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swad-core/swad_exam.c

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// swad_exam.c: exams
/*
SWAD (Shared Workspace At a Distance),
is a web platform developed at the University of Granada (Spain),
and used to support university teaching.
This file is part of SWAD core.
Copyright (C) 1999-2020 Antonio Cañas Vargas
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General 3 License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*****************************************************************************/
/********************************* Headers ***********************************/
/*****************************************************************************/
#define _GNU_SOURCE // For asprintf
#include <float.h> // For DBL_MAX
#include <linux/limits.h> // For PATH_MAX
#include <stddef.h> // For NULL
#include <stdio.h> // For asprintf
#include <stdlib.h> // For calloc
#include <string.h> // For string functions
#include "swad_database.h"
#include "swad_exam.h"
#include "swad_exam_event.h"
#include "swad_exam_result.h"
#include "swad_figure.h"
#include "swad_form.h"
#include "swad_global.h"
#include "swad_HTML.h"
#include "swad_match.h"
#include "swad_match_result.h"
#include "swad_pagination.h"
#include "swad_role.h"
#include "swad_test.h"
#include "swad_test_visibility.h"
/*****************************************************************************/
/************** External global variables from others modules ****************/
/*****************************************************************************/
extern struct Globals Gbl;
/*****************************************************************************/
/***************************** Private constants *****************************/
/*****************************************************************************/
#define Exa_MAX_CHARS_ANSWER (1024 - 1) // 1023
#define Exa_MAX_BYTES_ANSWER ((Exa_MAX_CHARS_ANSWER + 1) * Str_MAX_BYTES_PER_CHAR - 1) // 16383
#define Exa_MAX_ANSWERS_PER_QUESTION 10
#define Exa_MAX_SELECTED_QUESTIONS 10000
#define Exa_MAX_BYTES_LIST_SELECTED_QUESTIONS (Exa_MAX_SELECTED_QUESTIONS * (Cns_MAX_DECIMAL_DIGITS_LONG + 1))
/* Score range [0...max.score]
will be converted to
grade range [0...max.grade]
Example: Exam with 5 questions, unique-choice, 4 options per question
max.score = 5 * 1 = 5
min.score = 5 * (-0.33) = -1,67
max.grade given by teacher = 0.2 ==> min.grade = -0,067
grade
^
| /
max.grade--> +---------+
| /|
| / |
| / |
| / |
| / |
| / |
| / |
| / |
|/ |
------+---0-+---------+---------> score
^ /0 ^
min.score/ | max.score
| / | (num.questions)
| / |
|/ |
+-----+ <--min.grade
/ |
*/
#define Exa_MAX_GRADE_DEFAULT 1.0
/*****************************************************************************/
/******************************* Private types *******************************/
/*****************************************************************************/
/*****************************************************************************/
/***************************** Private variables *****************************/
/*****************************************************************************/
/*****************************************************************************/
/***************************** Private prototypes ****************************/
/*****************************************************************************/
static void Exa_ListAllExams (struct Exa_Exams *Exams);
static bool Exa_CheckIfICanEditExams (void);
static void Exa_PutIconsListExams (void *Exams);
static void Exa_PutIconToCreateNewExam (struct Exa_Exams *Exams);
static void Exa_PutButtonToCreateNewExam (struct Exa_Exams *Exams);
static void Exa_PutParamsToCreateNewExam (void *Exams);
static void Exa_ShowOneExam (struct Exa_Exams *Exams,
struct Exa_Exam *Exam,bool ShowOnlyThisExam);
static void Exa_PutIconToShowResultsOfExam (void *Exams);
static void Exa_WriteAuthor (struct Exa_Exam *Exam);
static void Exa_PutHiddenParamExamOrder (Exa_Order_t SelectedOrder);
static void Exa_PutFormsToRemEditOneExam (struct Exa_Exams *Exams,
const struct Exa_Exam *Exam,
const char *Anchor);
static void Exa_PutParamsOneSet (void *Exams);
static void Exa_PutParamsOneQst (void *Exams);
static void Exa_PutHiddenParamOrder (Exa_Order_t SelectedOrder);
static Exa_Order_t Exa_GetParamOrder (void);
static void Exa_GetExamTxtFromDB (long ExaCod,char Txt[Cns_MAX_BYTES_TEXT + 1]);
static void Exa_RemoveExamFromAllTables (long ExaCod);
static bool ExaSet_CheckIfSimilarSetExists (const struct ExaSet_Set *Set);
static bool Exa_CheckIfSimilarExamExists (const struct Exa_Exam *Exam);
static void ExaSet_PutFormsEditionSet (struct Exa_Exams *Exams,
struct Exa_Exam *Exam,
struct ExaSet_Set *Set,
bool ItsANewSet);
static void ExaSet_ReceiveSetFieldsFromForm (struct ExaSet_Set *Set);
static bool ExaSet_CheckSetFieldsReceivedFromForm (const struct ExaSet_Set *Set);
static void Exa_PutFormsEditionExam (struct Exa_Exams *Exams,
struct Exa_Exam *Exam,
char Txt[Cns_MAX_BYTES_TEXT + 1],
bool ItsANewExam);
static void Exa_ReceiveExamFieldsFromForm (struct Exa_Exam *Exam,
char Txt[Cns_MAX_BYTES_TEXT + 1]);
static bool Exa_CheckExamFieldsReceivedFromForm (const struct Exa_Exam *Exam);
static void ExaSet_CreateSet (struct ExaSet_Set *Set);
static void ExaSet_UpdateSet (struct ExaSet_Set *Set);
static void Exa_CreateExam (struct Exa_Exam *Exam,const char *Txt);
static void Exa_UpdateExam (struct Exa_Exam *Exam,const char *Txt);
static void Exa_RemAnswersOfAQuestion (long ExaCod,unsigned QstInd);
static unsigned Exa_GetMaxSetIndexInExam (long ExaCod);
static unsigned Exa_GetMaxQuestionIndexInExam (long ExaCod);
static void Exa_ListExamSets (struct Exa_Exams *Exams,struct Exa_Exam *Exam);
static void Exa_ListExamQuestions (struct Exa_Exams *Exams,struct Exa_Exam *Exam);
static void ExaSet_ListOneOrMoreSetsForEdition (struct Exa_Exams *Exams,
long ExaCod,unsigned NumSets,
MYSQL_RES *mysql_res,
bool ICanEditSets);
static void ExaSet_ResetSet (struct ExaSet_Set *Set);
static void Exa_PutParamSetCod (void *SetCod);
static void Exa_ListOneOrMoreQuestionsForEdition (struct Exa_Exams *Exams,
long ExaCod,unsigned NumQsts,
MYSQL_RES *mysql_res,
bool ICanEditQuestions);
static void Exa_ListQuestionForEdition (const struct Tst_Question *Question,
unsigned QstInd,bool QuestionExists);
static void Exa_PutIconToAddNewSets (void *Exams);
static void Exa_PutIconToAddNewQuestions (void *Exams);
static void Exa_PutButtonToAddNewSet (struct Exa_Exams *Exams);
static void Exa_PutButtonToAddNewQuestions (struct Exa_Exams *Exams);
static void Exa_AllocateListSelectedQuestions (struct Exa_Exams *Exams);
static void Exa_FreeListsSelectedQuestions (struct Exa_Exams *Exams);
static unsigned Exa_CountNumQuestionsInList (const struct Exa_Exams *Exams);
static void Exa_ExchangeQuestions (long ExaCod,
unsigned QstIndTop,unsigned QstIndBottom);
static bool Exa_CheckIfEditable (const struct Exa_Exam *Exam);
/*****************************************************************************/
/******************************* Reset exams *********************************/
/*****************************************************************************/
void Exa_ResetExams (struct Exa_Exams *Exams)
{
Exams->LstIsRead = false; // List not read from database...
Exams->Num = 0; // Total number of exams
Exams->NumSelected = 0; // Number of exams selected
Exams->Lst = NULL; // List of exams
Exams->SelectedOrder = Exa_ORDER_DEFAULT;
Exams->CurrentPage = 0;
Exams->ListQuestions = NULL;
Exams->ExaCodsSelected = NULL; // String with selected exam codes separated by separator multiple
Exams->ExaCod = -1L; // Selected/current exam code
Exams->EvtCod = -1L; // Selected/current event code
Exams->SetInd = 0; // Current set index
Exams->QstInd = 0; // Current question index
}
/*****************************************************************************/
/*************************** Initialize exam to empty ************************/
/*****************************************************************************/
void Exa_ResetExam (struct Exa_Exam *Exam)
{
/***** Initialize to empty exam *****/
Exam->ExaCod = -1L;
Exam->CrsCod = -1L;
Exam->UsrCod = -1L;
Exam->MaxGrade = Exa_MAX_GRADE_DEFAULT;
Exam->Visibility = TstVis_VISIBILITY_DEFAULT;
Exam->TimeUTC[Dat_START_TIME] = (time_t) 0;
Exam->TimeUTC[Dat_END_TIME ] = (time_t) 0;
Exam->Title[0] = '\0';
Exam->NumQsts = 0;
Exam->NumEvts = 0;
Exam->NumUnfinishedEvts = 0;
Exam->Hidden = false;
}
/*****************************************************************************/
/***************************** List all exams ********************************/
/*****************************************************************************/
void Exa_SeeAllExams (void)
{
struct Exa_Exams Exams;
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Get parameters *****/
Exa_GetParams (&Exams);
/***** Show all exams *****/
Exa_ListAllExams (&Exams);
}
/*****************************************************************************/
/**************************** Show all the exams *****************************/
/*****************************************************************************/
static void Exa_ListAllExams (struct Exa_Exams *Exams)
{
extern const char *Hlp_ASSESSMENT_Exams;
extern const char *Txt_Exams;
extern const char *Txt_EXAMS_ORDER_HELP[Exa_NUM_ORDERS];
extern const char *Txt_EXAMS_ORDER[Exa_NUM_ORDERS];
extern const char *Txt_Events;
extern const char *Txt_No_exams;
Exa_Order_t Order;
struct Pagination Pagination;
unsigned NumExam;
struct Exa_Exam Exam;
/***** Get number of groups in current course *****/
if (!Gbl.Crs.Grps.NumGrps)
Gbl.Crs.Grps.WhichGrps = Grp_ALL_GROUPS;
/***** Get list of exams *****/
Exa_GetListExams (Exams,Exams->SelectedOrder);
/***** Compute variables related to pagination *****/
Pagination.NumItems = Exams->Num;
Pagination.CurrentPage = (int) Exams->CurrentPage;
Pag_CalculatePagination (&Pagination);
Exams->CurrentPage = (unsigned) Pagination.CurrentPage;
/***** Begin box *****/
Box_BoxBegin ("100%",Txt_Exams,
Exa_PutIconsListExams,Exams,
Hlp_ASSESSMENT_Exams,Box_NOT_CLOSABLE);
/***** Write links to pages *****/
Pag_WriteLinksToPagesCentered (Pag_EXAMS,&Pagination,
Exams,-1L);
if (Exams->Num)
{
/***** Table head *****/
HTM_TABLE_BeginWideMarginPadding (2);
HTM_TR_Begin (NULL);
if (Exa_CheckIfICanEditExams ())
HTM_TH (1,1,"CONTEXT_COL",NULL); // Column for contextual icons
for (Order = (Exa_Order_t) 0;
Order <= (Exa_Order_t) (Exa_NUM_ORDERS - 1);
Order++)
{
HTM_TH_Begin (1,1,"LM");
/* Form to change order */
Frm_StartForm (ActSeeAllExa);
Pag_PutHiddenParamPagNum (Pag_EXAMS,Exams->CurrentPage);
Par_PutHiddenParamUnsigned (NULL,"Order",(unsigned) Order);
HTM_BUTTON_SUBMIT_Begin (Txt_EXAMS_ORDER_HELP[Order],"BT_LINK TIT_TBL",NULL);
if (Order == Exams->SelectedOrder)
HTM_U_Begin ();
HTM_Txt (Txt_EXAMS_ORDER[Order]);
if (Order == Exams->SelectedOrder)
HTM_U_End ();
HTM_BUTTON_End ();
Frm_EndForm ();
HTM_TH_End ();
}
HTM_TH (1,1,"RM",Txt_Events);
HTM_TR_End ();
/***** Write all exams *****/
for (NumExam = Pagination.FirstItemVisible;
NumExam <= Pagination.LastItemVisible;
NumExam++)
{
/* Get data of this exam */
Exam.ExaCod = Exams->Lst[NumExam - 1].ExaCod;
Exa_GetDataOfExamByCod (&Exam);
/* Show exam */
Exa_ShowOneExam (Exams,
&Exam,
false); // Do not show only this exam
}
/***** End table *****/
HTM_TABLE_End ();
}
else // No exams created
Ale_ShowAlert (Ale_INFO,Txt_No_exams);
/***** Write again links to pages *****/
Pag_WriteLinksToPagesCentered (Pag_EXAMS,&Pagination,
Exams,-1L);
/***** Button to create a new exam *****/
if (Exa_CheckIfICanEditExams ())
Exa_PutButtonToCreateNewExam (Exams);
/***** End box *****/
Box_BoxEnd ();
/***** Free list of exams *****/
Exa_FreeListExams (Exams);
}
/*****************************************************************************/
/************************ Check if I can edit exams **************************/
/*****************************************************************************/
static bool Exa_CheckIfICanEditExams (void)
{
switch (Gbl.Usrs.Me.Role.Logged)
{
case Rol_TCH:
case Rol_SYS_ADM:
return true;
default:
return false;
}
return false;
}
/*****************************************************************************/
/***************** Put contextual icons in list of exams *******************/
/*****************************************************************************/
static void Exa_PutIconsListExams (void *Exams)
{
if (Exams)
{
/***** Put icon to create a new exam *****/
if (Exa_CheckIfICanEditExams ())
Exa_PutIconToCreateNewExam ((struct Exa_Exams *) Exams);
/***** Put icon to view events results *****/
switch (Gbl.Usrs.Me.Role.Logged)
{
case Rol_STD:
Ico_PutContextualIconToShowResults (ActSeeMyExaEvtResCrs,NULL,
NULL,NULL);
break;
case Rol_NET:
case Rol_TCH:
case Rol_SYS_ADM:
Ico_PutContextualIconToShowResults (ActReqSeeAllExaEvtRes,NULL,
NULL,NULL);
break;
default:
break;
}
/***** Put icon to show a figure *****/
Fig_PutIconToShowFigure (Fig_EXAMS);
}
}
/*****************************************************************************/
/********************** Put icon to create a new exam **********************/
/*****************************************************************************/
static void Exa_PutIconToCreateNewExam (struct Exa_Exams *Exams)
{
extern const char *Txt_New_exam;
Ico_PutContextualIconToAdd (ActFrmNewExa,NULL,
Exa_PutParamsToCreateNewExam,Exams,
Txt_New_exam);
}
/*****************************************************************************/
/********************* Put button to create a new exam *********************/
/*****************************************************************************/
static void Exa_PutButtonToCreateNewExam (struct Exa_Exams *Exams)
{
extern const char *Txt_New_exam;
Frm_StartForm (ActFrmNewExa);
Exa_PutParamsToCreateNewExam (Exams);
Btn_PutConfirmButton (Txt_New_exam);
Frm_EndForm ();
}
/*****************************************************************************/
/******************* Put parameters to create a new exam *******************/
/*****************************************************************************/
static void Exa_PutParamsToCreateNewExam (void *Exams)
{
if (Exams)
{
Exa_PutHiddenParamExamOrder (((struct Exa_Exams *) Exams)->SelectedOrder);
Pag_PutHiddenParamPagNum (Pag_EXAMS,((struct Exa_Exams *) Exams)->CurrentPage);
}
}
/*****************************************************************************/
/****************************** Show one exam ******************************/
/*****************************************************************************/
void Exa_SeeOneExam (void)
{
struct Exa_Exams Exams;
struct Exa_Exam Exam;
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Reset exam *****/
Exa_ResetExam (&Exam);
/***** Get parameters *****/
Exa_GetParams (&Exams);
if (Exams.ExaCod <= 0)
Lay_WrongExamExit ();
Exam.ExaCod = Exams.ExaCod;
/***** Get data of exam *****/
Exa_GetDataOfExamByCod (&Exam);
/***** Show exam *****/
Exa_ShowOnlyOneExam (&Exams,&Exam,
false, // Do not list exam questions
false); // Do not put form to start new event
}
/*****************************************************************************/
/******************************* Show one exam *******************************/
/*****************************************************************************/
void Exa_ShowOnlyOneExam (struct Exa_Exams *Exams,
struct Exa_Exam *Exam,
bool ListExamQuestions,
bool PutFormNewMatch)
{
Exa_ShowOnlyOneExamBegin (Exams,Exam,ListExamQuestions,PutFormNewMatch);
Exa_ShowOnlyOneExamEnd ();
}
void Exa_ShowOnlyOneExamBegin (struct Exa_Exams *Exams,
struct Exa_Exam *Exam,
bool ListExamQuestions,
bool PutFormNewMatch)
{
extern const char *Hlp_ASSESSMENT_Exams;
extern const char *Txt_Exam;
/***** Begin box *****/
Exams->ExaCod = Exam->ExaCod;
Box_BoxBegin (NULL,Txt_Exam,
Exa_PutIconToShowResultsOfExam,Exams,
Hlp_ASSESSMENT_Exams,Box_NOT_CLOSABLE);
/***** Show exam *****/
Exa_ShowOneExam (Exams,
Exam,
true); // Show only this exam
if (ListExamQuestions)
/***** Write questions of this exam *****/
Exa_ListExamQuestions (Exams,Exam);
else
/***** List events *****/
ExaEvt_ListEvents (Exams,Exam,PutFormNewMatch);
}
void Exa_ShowOnlyOneExamEnd (void)
{
/***** End box *****/
Box_BoxEnd ();
}
static void Exa_ShowOneExam (struct Exa_Exams *Exams,
struct Exa_Exam *Exam,bool ShowOnlyThisExam)
{
extern const char *Txt_View_exam;
extern const char *Txt_No_of_questions;
extern const char *Txt_Maximum_grade;
extern const char *Txt_Result_visibility;
extern const char *Txt_Events;
char *Anchor = NULL;
static unsigned UniqueId = 0;
char *Id;
Dat_StartEndTime_t StartEndTime;
const char *Color;
char Txt[Cns_MAX_BYTES_TEXT + 1];
/***** Set anchor string *****/
Frm_SetAnchorStr (Exam->ExaCod,&Anchor);
/***** Begin box and table *****/
if (ShowOnlyThisExam)
HTM_TABLE_BeginWidePadding (2);
/***** Start first row of this exam *****/
HTM_TR_Begin (NULL);
/***** Icons related to this exam *****/
if (Exa_CheckIfICanEditExams ())
{
if (ShowOnlyThisExam)
HTM_TD_Begin ("rowspan=\"2\" class=\"CONTEXT_COL\"");
else
HTM_TD_Begin ("rowspan=\"2\" class=\"CONTEXT_COL COLOR%u\"",Gbl.RowEvenOdd);
/* Icons to remove/edit this exam */
Exa_PutFormsToRemEditOneExam (Exams,Exam,Anchor);
HTM_TD_End ();
}
/***** Start/end date/time *****/
UniqueId++;
for (StartEndTime = (Dat_StartEndTime_t) 0;
StartEndTime <= (Dat_StartEndTime_t) (Dat_NUM_START_END_TIME - 1);
StartEndTime++)
{
if (asprintf (&Id,"exa_date_%u_%u",(unsigned) StartEndTime,UniqueId) < 0)
Lay_NotEnoughMemoryExit ();
Color = Exam->NumUnfinishedEvts ? (Exam->Hidden ? "DATE_GREEN_LIGHT":
"DATE_GREEN") :
(Exam->Hidden ? "DATE_RED_LIGHT":
"DATE_RED");
if (ShowOnlyThisExam)
HTM_TD_Begin ("id=\"%s\" class=\"%s LT\"",
Id,Color);
else
HTM_TD_Begin ("id=\"%s\" class=\"%s LT COLOR%u\"",
Id,Color,Gbl.RowEvenOdd);
if (Exam->TimeUTC[Dat_START_TIME])
Dat_WriteLocalDateHMSFromUTC (Id,Exam->TimeUTC[StartEndTime],
Gbl.Prefs.DateFormat,Dat_SEPARATOR_BREAK,
true,true,true,0x7);
HTM_TD_End ();
free (Id);
}
/***** Exam title and main data *****/
if (ShowOnlyThisExam)
HTM_TD_Begin ("class=\"LT\"");
else
HTM_TD_Begin ("class=\"LT COLOR%u\"",Gbl.RowEvenOdd);
/* Exam title */
Exams->ExaCod = Exam->ExaCod;
HTM_ARTICLE_Begin (Anchor);
Frm_StartForm (ActSeeExa);
Exa_PutParams (Exams);
HTM_BUTTON_SUBMIT_Begin (Txt_View_exam,
Exam->Hidden ? "BT_LINK LT ASG_TITLE_LIGHT":
"BT_LINK LT ASG_TITLE",
NULL);
HTM_Txt (Exam->Title);
HTM_BUTTON_End ();
Frm_EndForm ();
HTM_ARTICLE_End ();
/* Number of questions, maximum grade, visibility of results */
HTM_DIV_Begin ("class=\"%s\"",Exam->Hidden ? "ASG_GRP_LIGHT" :
"ASG_GRP");
HTM_TxtColonNBSP (Txt_No_of_questions);
HTM_Unsigned (Exam->NumQsts);
HTM_BR ();
HTM_TxtColonNBSP (Txt_Maximum_grade);
HTM_Double (Exam->MaxGrade);
HTM_BR ();
HTM_TxtColonNBSP (Txt_Result_visibility);
TstVis_ShowVisibilityIcons (Exam->Visibility,Exam->Hidden);
HTM_DIV_End ();
/***** Number of events in exam *****/
if (ShowOnlyThisExam)
HTM_TD_Begin ("class=\"RT\"");
else
HTM_TD_Begin ("class=\"RT COLOR%u\"",Gbl.RowEvenOdd);
Exams->ExaCod = Exam->ExaCod;
Frm_StartForm (ActSeeExa);
Exa_PutParams (Exams);
HTM_BUTTON_SUBMIT_Begin (Txt_Events,
Exam->Hidden ? "BT_LINK LT ASG_TITLE_LIGHT" :
"BT_LINK LT ASG_TITLE",
NULL);
if (ShowOnlyThisExam)
HTM_TxtColonNBSP (Txt_Events);
HTM_Unsigned (Exam->NumEvts);
HTM_BUTTON_End ();
Frm_EndForm ();
HTM_TD_End ();
/***** End 1st row of this exam *****/
HTM_TR_End ();
/***** Start 2nd row of this exam *****/
HTM_TR_Begin (NULL);
/***** Author of the exam *****/
if (ShowOnlyThisExam)
HTM_TD_Begin ("colspan=\"2\" class=\"LT\"");
else
HTM_TD_Begin ("colspan=\"2\" class=\"LT COLOR%u\"",Gbl.RowEvenOdd);
Exa_WriteAuthor (Exam);
HTM_TD_End ();
/***** Text of the exam *****/
if (ShowOnlyThisExam)
HTM_TD_Begin ("colspan=\"2\" class=\"LT\"");
else
HTM_TD_Begin ("colspan=\"2\" class=\"LT COLOR%u\"",Gbl.RowEvenOdd);
Exa_GetExamTxtFromDB (Exam->ExaCod,Txt);
Str_ChangeFormat (Str_FROM_HTML,Str_TO_RIGOROUS_HTML,
Txt,Cns_MAX_BYTES_TEXT,false); // Convert from HTML to rigorous HTML
Str_InsertLinks (Txt,Cns_MAX_BYTES_TEXT,60); // Insert links
HTM_DIV_Begin ("class=\"PAR %s\"",Exam->Hidden ? "DAT_LIGHT" :
"DAT");
HTM_Txt (Txt);
HTM_DIV_End ();
HTM_TD_End ();
/***** End 2nd row of this exam *****/
HTM_TR_End ();
/***** End table *****/
if (ShowOnlyThisExam)
HTM_TABLE_End ();
else
Gbl.RowEvenOdd = 1 - Gbl.RowEvenOdd;
/***** Free anchor string *****/
Frm_FreeAnchorStr (Anchor);
}
/*****************************************************************************/
/************* Put icon to show results of events in an exam *****************/
/*****************************************************************************/
static void Exa_PutIconToShowResultsOfExam (void *Exams)
{
if (Exams)
{
/***** Put icon to view events results *****/
switch (Gbl.Usrs.Me.Role.Logged)
{
case Rol_STD:
Ico_PutContextualIconToShowResults (ActSeeMyExaEvtResExa,ExaRes_RESULTS_BOX_ID,
Exa_PutParams,Exams);
break;
case Rol_NET:
case Rol_TCH:
case Rol_SYS_ADM:
Ico_PutContextualIconToShowResults (ActSeeAllExaEvtResExa,ExaRes_RESULTS_BOX_ID,
Exa_PutParams,Exams);
break;
default:
break;
}
}
}
/*****************************************************************************/
/*********************** Write the author of an exam ************************/
/*****************************************************************************/
static void Exa_WriteAuthor (struct Exa_Exam *Exam)
{
Usr_WriteAuthor1Line (Exam->UsrCod,Exam->Hidden);
}
/*****************************************************************************/
/****** Put a hidden parameter with the type of order in list of exams *******/
/*****************************************************************************/
static void Exa_PutHiddenParamExamOrder (Exa_Order_t SelectedOrder)
{
Par_PutHiddenParamUnsigned (NULL,"Order",(unsigned) SelectedOrder);
}
/*****************************************************************************/
/******************** Put a link (form) to edit one exam *********************/
/*****************************************************************************/
static void Exa_PutFormsToRemEditOneExam (struct Exa_Exams *Exams,
const struct Exa_Exam *Exam,
const char *Anchor)
{
Exams->ExaCod = Exam->ExaCod;
/***** Put icon to remove exam *****/
Ico_PutContextualIconToRemove (ActReqRemExa,
Exa_PutParams,Exams);
/***** Put icon to unhide/hide exam *****/
if (Exam->Hidden)
Ico_PutContextualIconToUnhide (ActShoExa,Anchor,
Exa_PutParams,Exams);
else
Ico_PutContextualIconToHide (ActHidExa,Anchor,
Exa_PutParams,Exams);
/***** Put icon to edit exam *****/
Ico_PutContextualIconToEdit (ActEdiOneExa,NULL,
Exa_PutParams,Exams);
}
/*****************************************************************************/
/************** Put parameter to move/remove one set of questions ****************/
/*****************************************************************************/
static void Exa_PutParamsOneSet (void *Exams)
{
if (Exams)
{
Exa_PutParams (Exams);
Exa_PutParamSetInd (((struct Exa_Exams *) Exams)->SetInd);
}
}
/*****************************************************************************/
/**************** Put parameter to move/remove one question ******************/
/*****************************************************************************/
static void Exa_PutParamsOneQst (void *Exams)
{
if (Exams)
{
Exa_PutParams (Exams);
Exa_PutParamQstInd (((struct Exa_Exams *) Exams)->QstInd);
}
}
/*****************************************************************************/
/*********************** Params used to edit an exam **************************/
/*****************************************************************************/
void Exa_PutParams (void *Exams)
{
Grp_WhichGroups_t WhichGroups;
if (Exams)
{
if (((struct Exa_Exams *) Exams)->ExaCod > 0)
Exa_PutParamExamCod (((struct Exa_Exams *) Exams)->ExaCod);
Exa_PutHiddenParamOrder (((struct Exa_Exams *) Exams)->SelectedOrder);
WhichGroups = Grp_GetParamWhichGroups ();
Grp_PutParamWhichGroups (&WhichGroups);
Pag_PutHiddenParamPagNum (Pag_EXAMS,((struct Exa_Exams *) Exams)->CurrentPage);
}
}
/*****************************************************************************/
/******************** Write parameter with code of exam **********************/
/*****************************************************************************/
void Exa_PutParamExamCod (long ExaCod)
{
Par_PutHiddenParamLong (NULL,"ExaCod",ExaCod);
}
/*****************************************************************************/
/********************* Get parameter with code of exam ***********************/
/*****************************************************************************/
long Exa_GetParamExamCod (void)
{
/***** Get code of exam *****/
return Par_GetParToLong ("ExaCod");
}
/*****************************************************************************/
/********************** Get parameter with code of set ***********************/
/*****************************************************************************/
long ExaSet_GetParamSetCod (void)
{
/***** Get code of set *****/
return Par_GetParToLong ("SetCod");
}
/*****************************************************************************/
/******************* Get parameters used to edit an exam **********************/
/*****************************************************************************/
void Exa_GetParams (struct Exa_Exams *Exams)
{
/***** Get other parameters *****/
Exams->SelectedOrder = Exa_GetParamOrder ();
Exams->CurrentPage = Pag_GetParamPagNum (Pag_EXAMS);
/***** Get exam code *****/
Exams->ExaCod = Exa_GetParamExamCod ();
}
/*****************************************************************************/
/****** Put a hidden parameter with the type of order in list of exams *******/
/*****************************************************************************/
static void Exa_PutHiddenParamOrder (Exa_Order_t SelectedOrder)
{
if (SelectedOrder != Exa_ORDER_DEFAULT)
Par_PutHiddenParamUnsigned (NULL,"Order",(unsigned) SelectedOrder);
}
/*****************************************************************************/
/********** Get parameter with the type or order in list of exams ************/
/*****************************************************************************/
static Exa_Order_t Exa_GetParamOrder (void)
{
return (Exa_Order_t) Par_GetParToUnsignedLong ("Order",
0,
Exa_NUM_ORDERS - 1,
(unsigned long) Exa_ORDER_DEFAULT);
}
/*****************************************************************************/
/*********************** Get list of all the exams *************************/
/*****************************************************************************/
void Exa_GetListExams (struct Exa_Exams *Exams,Exa_Order_t SelectedOrder)
{
static const char *OrderBySubQuery[Exa_NUM_ORDERS] =
{
[Exa_ORDER_BY_START_DATE] = "StartTime DESC,EndTime DESC,exa_exams.Title DESC",
[Exa_ORDER_BY_END_DATE ] = "EndTime DESC,StartTime DESC,exa_exams.Title DESC",
[Exa_ORDER_BY_TITLE ] = "exa_exams.Title",
};
MYSQL_RES *mysql_res;
MYSQL_ROW row;
char *HiddenSubQuery;
unsigned long NumRows = 0; // Initialized to avoid warning
unsigned NumExam;
/***** Free list of exams *****/
if (Exams->LstIsRead)
Exa_FreeListExams (Exams);
/***** Subquery: get hidden exams depending on user's role *****/
switch (Gbl.Usrs.Me.Role.Logged)
{
case Rol_STD:
if (asprintf (&HiddenSubQuery," AND exa_exams.Hidden='N'") < 0)
Lay_NotEnoughMemoryExit ();
break;
case Rol_NET:
case Rol_TCH:
case Rol_DEG_ADM:
case Rol_CTR_ADM:
case Rol_INS_ADM:
case Rol_SYS_ADM:
if (asprintf (&HiddenSubQuery,"%s","") < 0)
Lay_NotEnoughMemoryExit ();
break;
default:
Rol_WrongRoleExit ();
break;
}
/***** Get list of exams from database *****/
NumRows = DB_QuerySELECT (&mysql_res,"can not get exams",
"SELECT exa_exams.ExaCod," // row[0]
"MIN(exa_events.StartTime) AS StartTime," // row[1]
"MAX(exa_events.EndTime) AS EndTime" // row[2]
" FROM exa_exams"
" LEFT JOIN exa_events"
" ON exa_exams.ExaCod=exa_events.ExaCod"
" WHERE exa_exams.CrsCod=%ld"
"%s"
" GROUP BY exa_exams.ExaCod"
" ORDER BY %s",
Gbl.Hierarchy.Crs.CrsCod,
HiddenSubQuery,
OrderBySubQuery[SelectedOrder]);
/***** Free allocated memory for subquery *****/
free (HiddenSubQuery);
if (NumRows) // Exams found...
{
Exams->Num = (unsigned) NumRows;
/***** Create list of exams *****/
if ((Exams->Lst = (struct Exa_ExamSelected *) malloc (NumRows * sizeof (struct Exa_ExamSelected))) == NULL)
Lay_NotEnoughMemoryExit ();
/***** Get the exams codes *****/
for (NumExam = 0;
NumExam < Exams->Num;
NumExam++)
{
/* Get next exam code (row[0]) */
row = mysql_fetch_row (mysql_res);
if ((Exams->Lst[NumExam].ExaCod = Str_ConvertStrCodToLongCod (row[0])) <= 0)
Lay_ShowErrorAndExit ("Error: wrong exam code.");
}
}
else
Exams->Num = 0;
/***** Free structure that stores the query result *****/
DB_FreeMySQLResult (&mysql_res);
Exams->LstIsRead = true;
}
/*****************************************************************************/
/********************* Get list of exam events selected **********************/
/*****************************************************************************/
void Exa_GetListSelectedExaCods (struct Exa_Exams *Exams)
{
unsigned MaxSizeListExaCodsSelected;
unsigned NumExam;
const char *Ptr;
long ExaCod;
char LongStr[Cns_MAX_DECIMAL_DIGITS_LONG + 1];
/***** Allocate memory for list of exams selected *****/
MaxSizeListExaCodsSelected = Exams->Num * (Cns_MAX_DECIMAL_DIGITS_LONG + 1);
if ((Exams->ExaCodsSelected = (char *) malloc (MaxSizeListExaCodsSelected + 1)) == NULL)
Lay_NotEnoughMemoryExit ();
/***** Get parameter multiple with list of exams selected *****/
Par_GetParMultiToText ("ExaCod",Exams->ExaCodsSelected,MaxSizeListExaCodsSelected);
/***** Set which exams will be shown as selected (checkboxes on) *****/
if (Exams->ExaCodsSelected[0]) // Some exams selected
{
/* Reset selection */
for (NumExam = 0;
NumExam < Exams->Num;
NumExam++)
Exams->Lst[NumExam].Selected = false;
Exams->NumSelected = 0;
/* Set some exams as selected */
for (Ptr = Exams->ExaCodsSelected;
*Ptr;
)
{
/* Get next exam selected */
Par_GetNextStrUntilSeparParamMult (&Ptr,LongStr,Cns_MAX_DECIMAL_DIGITS_LONG);
ExaCod = Str_ConvertStrCodToLongCod (LongStr);
/* Set each exam in *StrExaCodsSelected as selected */
for (NumExam = 0;
NumExam < Exams->Num;
NumExam++)
if (Exams->Lst[NumExam].ExaCod == ExaCod)
{
Exams->Lst[NumExam].Selected = true;
Exams->NumSelected++;
break;
}
}
}
else // No exams selected
{
/***** Set all exams as selected *****/
for (NumExam = 0;
NumExam < Exams->Num;
NumExam++)
Exams->Lst[NumExam].Selected = true;
Exams->NumSelected = Exams->Num;
}
}
/*****************************************************************************/
/*********************** Get set data using its code *************************/
/*****************************************************************************/
void ExaSet_GetDataOfSetByCod (struct ExaSet_Set *Set)
{
MYSQL_RES *mysql_res;
MYSQL_ROW row;
unsigned long NumRows;
/***** Get data of set from database *****/
NumRows = DB_QuerySELECT (&mysql_res,"can not get set data",
"SELECT SetInd" // row[0]
" FROM exa_sets"
" WHERE SetCod=%ld"
" AND ExaCod=%ld", // Extra check
Set->SetCod,Set->ExaCod);
if (NumRows) // Set found...
{
/* Get row */
row = mysql_fetch_row (mysql_res);
/* Get index of the set (row[0]) */
Set->SetInd = Str_ConvertStrToUnsigned (row[0]);
}
else
/* Initialize to empty set */
ExaSet_ResetSet (Set);
/* Free structure that stores the query result */
DB_FreeMySQLResult (&mysql_res);
}
/*****************************************************************************/
/********************** Get exam data using its code *************************/
/*****************************************************************************/
void Exa_GetDataOfExamByCod (struct Exa_Exam *Exam)
{
MYSQL_RES *mysql_res;
MYSQL_ROW row;
unsigned long NumRows;
/***** Get data of exam from database *****/
NumRows = DB_QuerySELECT (&mysql_res,"can not get exam data",
"SELECT exa_exams.ExaCod," // row[0]
"exa_exams.CrsCod," // row[1]
"exa_exams.Hidden," // row[2]
"exa_exams.UsrCod," // row[3]
"exa_exams.MaxGrade," // row[4]
"exa_exams.Visibility," // row[5]
"exa_exams.Title" // row[6]
" FROM exa_exams"
" LEFT JOIN exa_events"
" ON exa_exams.ExaCod=exa_events.ExaCod"
" WHERE exa_exams.ExaCod=%ld",
Exam->ExaCod);
if (NumRows) // Exam found...
{
/* Get row */
row = mysql_fetch_row (mysql_res);
/* Get code of the exam (row[0]) */
Exam->ExaCod = Str_ConvertStrCodToLongCod (row[0]);
/* Get code of the course (row[1]) */
Exam->CrsCod = Str_ConvertStrCodToLongCod (row[1]);
/* Get whether the exam is hidden (row[2]) */
Exam->Hidden = (row[2][0] == 'Y');
/* Get author of the exam (row[3]) */
Exam->UsrCod = Str_ConvertStrCodToLongCod (row[3]);
/* Get maximum grade (row[4]) */
Exam->MaxGrade = Str_GetDoubleFromStr (row[4]);
if (Exam->MaxGrade < 0.0) // Only positive values allowed
Exam->MaxGrade = 0.0;
/* Get visibility (row[5]) */
Exam->Visibility = TstVis_GetVisibilityFromStr (row[5]);
/* Get the title of the exam (row[6]) */
Str_Copy (Exam->Title,row[6],
Exa_MAX_BYTES_TITLE);
/* Get number of questions */
Exam->NumQsts = Exa_GetNumQstsExam (Exam->ExaCod);
/* Get number of events */
Exam->NumEvts = ExaEvt_GetNumEventsInExam (Exam->ExaCod);
/* Get number of unfinished events */
Exam->NumUnfinishedEvts = ExaEvt_GetNumUnfinishedEventsInExam (Exam->ExaCod);
}
else
/* Initialize to empty exam */
Exa_ResetExam (Exam);
/* Free structure that stores the query result */
DB_FreeMySQLResult (&mysql_res);
if (Exam->ExaCod > 0)
{
/***** Get start and end times from database *****/
NumRows = DB_QuerySELECT (&mysql_res,"can not get exam data",
"SELECT UNIX_TIMESTAMP(MIN(StartTime))," // row[0]
"UNIX_TIMESTAMP(MAX(EndTime))" // row[1]
" FROM exa_events"
" WHERE ExaCod=%ld",
Exam->ExaCod);
if (NumRows)
{
/* Get row */
row = mysql_fetch_row (mysql_res);
/* Get start date (row[0] holds the start UTC time) */
Exam->TimeUTC[Dat_START_TIME] = Dat_GetUNIXTimeFromStr (row[0]);
/* Get end date (row[1] holds the end UTC time) */
Exam->TimeUTC[Dat_END_TIME ] = Dat_GetUNIXTimeFromStr (row[1]);
}
/* Free structure that stores the query result */
DB_FreeMySQLResult (&mysql_res);
}
else
{
Exam->TimeUTC[Dat_START_TIME] =
Exam->TimeUTC[Dat_END_TIME ] = (time_t) 0;
}
}
/*****************************************************************************/
/***************************** Free list of exams ****************************/
/*****************************************************************************/
void Exa_FreeListExams (struct Exa_Exams *Exams)
{
if (Exams->LstIsRead && Exams->Lst)
{
/***** Free memory used by the list of exams *****/
free (Exams->Lst);
Exams->Lst = NULL;
Exams->Num = 0;
Exams->LstIsRead = false;
}
}
/*****************************************************************************/
/********************** Get exam text from database ************************/
/*****************************************************************************/
static void Exa_GetExamTxtFromDB (long ExaCod,char Txt[Cns_MAX_BYTES_TEXT + 1])
{
MYSQL_RES *mysql_res;
MYSQL_ROW row;
unsigned long NumRows;
/***** Get text of exam from database *****/
NumRows = DB_QuerySELECT (&mysql_res,"can not get exam text",
"SELECT Txt FROM exa_exams WHERE ExaCod=%ld",
ExaCod);
/***** The result of the query must have one row or none *****/
if (NumRows == 1)
{
/* Get info text */
row = mysql_fetch_row (mysql_res);
Str_Copy (Txt,row[0],
Cns_MAX_BYTES_TEXT);
}
else
Txt[0] = '\0';
/***** Free structure that stores the query result *****/
DB_FreeMySQLResult (&mysql_res);
if (NumRows > 1)
Lay_ShowErrorAndExit ("Error when getting exam text.");
}
/*****************************************************************************/
/*************** Ask for confirmation of removing of an exam ******************/
/*****************************************************************************/
void Exa_AskRemExam (void)
{
extern const char *Txt_Do_you_really_want_to_remove_the_exam_X;
extern const char *Txt_Remove_exam;
struct Exa_Exams Exams;
struct Exa_Exam Exam;
/***** Check if I can edit exams *****/
if (!Exa_CheckIfICanEditExams ())
Lay_NoPermissionExit ();
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Reset exam *****/
Exa_ResetExam (&Exam);
/***** Get parameters *****/
Exa_GetParams (&Exams);
if (Exams.ExaCod <= 0)
Lay_WrongExamExit ();
Exam.ExaCod = Exams.ExaCod;
/***** Get data of the exam from database *****/
Exa_GetDataOfExamByCod (&Exam);
/***** Show question and button to remove exam *****/
Exams.ExaCod = Exam.ExaCod;
Ale_ShowAlertAndButton (ActRemExa,NULL,NULL,
Exa_PutParams,&Exams,
Btn_REMOVE_BUTTON,Txt_Remove_exam,
Ale_QUESTION,Txt_Do_you_really_want_to_remove_the_exam_X,
Exam.Title);
/***** Show exams again *****/
Exa_ListAllExams (&Exams);
}
/*****************************************************************************/
/******************************* Remove an exam *******************************/
/*****************************************************************************/
void Exa_RemoveExam (void)
{
extern const char *Txt_Exam_X_removed;
struct Exa_Exams Exams;
struct Exa_Exam Exam;
/***** Check if I can edit exams *****/
if (!Exa_CheckIfICanEditExams ())
Lay_NoPermissionExit ();
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Reset exam *****/
Exa_ResetExam (&Exam);
/***** Get exam code *****/
if ((Exam.ExaCod = Exa_GetParamExamCod ()) == -1L)
Lay_ShowErrorAndExit ("Code of exam is missing.");
/***** Get data of the exam from database *****/
Exa_GetDataOfExamByCod (&Exam);
/***** Remove exam from all tables *****/
Exa_RemoveExamFromAllTables (Exam.ExaCod);
/***** Write message to show the change made *****/
Ale_ShowAlert (Ale_SUCCESS,Txt_Exam_X_removed,
Exam.Title);
/***** Show exams again *****/
Exa_ListAllExams (&Exams);
}
/*****************************************************************************/
/*********************** Remove exam from all tables *************************/
/*****************************************************************************/
static void Exa_RemoveExamFromAllTables (long ExaCod)
{
/***** Remove all events in this exam *****/
ExaEvt_RemoveEventsInExamFromAllTables (ExaCod);
/***** Remove exam question *****/
DB_QueryDELETE ("can not remove exam questions",
"DELETE FROM exa_questions WHERE ExaCod=%ld",
ExaCod);
/***** Remove exam *****/
DB_QueryDELETE ("can not remove exam",
"DELETE FROM exa_exams WHERE ExaCod=%ld",
ExaCod);
}
/*****************************************************************************/
/******************** Remove all the exams of a course ***********************/
/*****************************************************************************/
void Exa_RemoveExamsCrs (long CrsCod)
{
/***** Remove all events in this course *****/
ExaEvt_RemoveEventInCourseFromAllTables (CrsCod);
/***** Remove the questions in exams *****/
DB_QueryDELETE ("can not remove questions in course exams",
"DELETE FROM exa_questions"
" USING exa_exams,exa_questions"
" WHERE exa_exams.CrsCod=%ld"
" AND exa_exams.ExaCod=exa_questions.ExaCod",
CrsCod);
/***** Remove the exams *****/
DB_QueryDELETE ("can not remove course exams",
"DELETE FROM exa_exams"
" WHERE CrsCod=%ld",
CrsCod);
}
/*****************************************************************************/
/******************************** Hide an exam ******************************/
/*****************************************************************************/
void Exa_HideExam (void)
{
struct Exa_Exams Exams;
struct Exa_Exam Exam;
/***** Check if I can edit exams *****/
if (!Exa_CheckIfICanEditExams ())
Lay_NoPermissionExit ();
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Reset exam *****/
Exa_ResetExam (&Exam);
/***** Get parameters *****/
Exa_GetParams (&Exams);
if (Exams.ExaCod <= 0)
Lay_WrongExamExit ();
Exam.ExaCod = Exams.ExaCod;
/***** Get data of the exam from database *****/
Exa_GetDataOfExamByCod (&Exam);
/***** Hide exam *****/
DB_QueryUPDATE ("can not hide exam",
"UPDATE exa_exams SET Hidden='Y' WHERE ExaCod=%ld",
Exam.ExaCod);
/***** Show exams again *****/
Exa_ListAllExams (&Exams);
}
/*****************************************************************************/
/******************************** Show an exam ******************************/
/*****************************************************************************/
void Exa_UnhideExam (void)
{
struct Exa_Exams Exams;
struct Exa_Exam Exam;
/***** Check if I can edit exams *****/
if (!Exa_CheckIfICanEditExams ())
Lay_NoPermissionExit ();
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Reset exam *****/
Exa_ResetExam (&Exam);
/***** Get parameters *****/
Exa_GetParams (&Exams);
if (Exams.ExaCod <= 0)
Lay_WrongExamExit ();
Exam.ExaCod = Exams.ExaCod;
/***** Get data of the exam from database *****/
Exa_GetDataOfExamByCod (&Exam);
/***** Show exam *****/
DB_QueryUPDATE ("can not show exam",
"UPDATE exa_exams SET Hidden='N' WHERE ExaCod=%ld",
Exam.ExaCod);
/***** Show exams again *****/
Exa_ListAllExams (&Exams);
}
/*****************************************************************************/
/************** Check if the title of a set of questions exists **************/
/*****************************************************************************/
static bool ExaSet_CheckIfSimilarSetExists (const struct ExaSet_Set *Set)
{
/***** Get number of set of questions with a field value from database *****/
return (DB_QueryCOUNT ("can not get similar sets of questions",
"SELECT COUNT(*) FROM exa_sets,exa_exams"
" WHERE exa_sets.ExaCod=%ld AND exa_sets.Title='%s'"
" AND exa_sets.SetCod<>%ld"
" AND exa_sets.ExaCod=exa_exams.ExaCod"
" AND exa_exams.CrsCod=%ld", // Extra check
Set->ExaCod,Set->Title,
Set->SetCod,
Gbl.Hierarchy.Crs.CrsCod) != 0);
}
/*****************************************************************************/
/******************* Check if the title of an exam exists *******************/
/*****************************************************************************/
static bool Exa_CheckIfSimilarExamExists (const struct Exa_Exam *Exam)
{
/***** Get number of exams with a field value from database *****/
return (DB_QueryCOUNT ("can not get similar exams",
"SELECT COUNT(*) FROM exa_exams"
" WHERE CrsCod=%ld AND Title='%s'"
" AND ExaCod<>%ld",
Gbl.Hierarchy.Crs.CrsCod,Exam->Title,
Exam->ExaCod) != 0);
}
/*****************************************************************************/
/**************** Request the creation or edition of an exam ******************/
/*****************************************************************************/
void Exa_RequestCreatOrEditExam (void)
{
struct Exa_Exams Exams;
struct Exa_Exam Exam;
bool ItsANewExam;
char Txt[Cns_MAX_BYTES_TEXT + 1];
/***** Check if I can edit exams *****/
if (!Exa_CheckIfICanEditExams ())
Lay_NoPermissionExit ();
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Reset exam *****/
Exa_ResetExam (&Exam);
/***** Get parameters *****/
Exa_GetParams (&Exams);
if (Exams.ExaCod <= 0)
Lay_WrongExamExit ();
Exam.ExaCod = Exams.ExaCod;
ItsANewExam = (Exam.ExaCod <= 0);
/***** Get exam data *****/
if (ItsANewExam)
{
/* Initialize to empty exam */
Exa_ResetExam (&Exam);
Txt[0] = '\0';
}
else
{
/* Get exam data from database */
Exa_GetDataOfExamByCod (&Exam);
Exa_GetExamTxtFromDB (Exam.ExaCod,Txt);
}
/***** Put forms to create/edit an exam *****/
Exa_PutFormsEditionExam (&Exams,&Exam,Txt,ItsANewExam);
/***** Show exams or questions *****/
if (ItsANewExam)
/* Show exams again */
Exa_ListAllExams (&Exams);
else
{
/* Show sets of the exam ready to be edited */
Exa_ListExamSets (&Exams,&Exam);
/* Show questions of the exam ready to be edited */
Exa_ListExamQuestions (&Exams,&Exam);
}
}
/*****************************************************************************/
/********************* Put a form to create/edit an exam **********************/
/*****************************************************************************/
static void ExaSet_PutFormsEditionSet (struct Exa_Exams *Exams,
struct Exa_Exam *Exam,
struct ExaSet_Set *Set,
bool ItsANewSet)
{
// extern const char *Hlp_ASSESSMENT_Exams_new_set;
// extern const char *Hlp_ASSESSMENT_Exams_edit_set;
extern const char *The_ClassFormInBox[The_NUM_THEMES];
extern const char *Txt_New_set;
extern const char *Txt_Edit_set;
extern const char *Txt_Title;
extern const char *Txt_Number_of_questions_in_this_set_that_will_appear_in_the_exam;
extern const char *Txt_Create_set;
extern const char *Txt_Save_changes;
/***** Begin form *****/
Exams->ExaCod = Exam->ExaCod;
Frm_StartForm (ItsANewSet ? ActNewExaSet :
ActChgExaSet);
Exa_PutParams (Exams);
/***** Begin box and table *****/
if (ItsANewSet)
Box_BoxTableBegin (NULL,Txt_New_set,
NULL,NULL,
NULL,Box_NOT_CLOSABLE,2);
else
Box_BoxTableBegin (NULL,
Exam->Title[0] ? Exam->Title :
Txt_Edit_set,
NULL,NULL,
NULL,Box_NOT_CLOSABLE,2);
/***** Set title *****/
HTM_TR_Begin (NULL);
/* Label */
Frm_LabelColumn ("RT","Title",Txt_Title);
/* Data */
HTM_TD_Begin ("class=\"LT\"");
HTM_INPUT_TEXT ("Title",ExaSet_MAX_CHARS_TITLE,Set->Title,false,
"id=\"Title\" required=\"required\""
" class=\"TITLE_DESCRIPTION_WIDTH\"");
HTM_TD_End ();
HTM_TR_End ();
/***** Number of questions in this set that will appear in the exam *****/
HTM_TR_Begin (NULL);
HTM_TD_Begin ("class=\"%s RM\"",The_ClassFormInBox[Gbl.Prefs.Theme]);
HTM_TxtF ("%s:",Txt_Number_of_questions_in_this_set_that_will_appear_in_the_exam);
HTM_TD_End ();
HTM_TD_Begin ("class=\"LM\"");
HTM_INPUT_LONG ("NumQstsToExam",0,UINT_MAX,Set->NumQstsToExam,false,
"required=\"required\"");
HTM_TD_End ();
HTM_TR_End ();
/***** End table, send button and end box *****/
if (ItsANewSet)
Box_BoxTableWithButtonEnd (Btn_CREATE_BUTTON,Txt_Create_set);
else
Box_BoxTableWithButtonEnd (Btn_CONFIRM_BUTTON,Txt_Save_changes);
/***** End form *****/
Frm_EndForm ();
}
/*****************************************************************************/
/**************** Receive form to create a new set of questions **************/
/*****************************************************************************/
void ExaSet_RecFormSet (void)
{
struct Exa_Exams Exams;
struct Exa_Exam Exam;
struct ExaSet_Set Set;
bool ItsANewSet;
/***** Check if I can edit exams *****/
if (!Exa_CheckIfICanEditExams ())
Lay_NoPermissionExit ();
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Reset exam and set *****/
Exa_ResetExam (&Exam);
ExaSet_ResetSet (&Set);
/***** Get parameters *****/
Exa_GetParams (&Exams);
if (Exams.ExaCod <= 0)
Lay_WrongExamExit ();
Set.ExaCod = Exam.ExaCod = Exams.ExaCod;
Set.SetCod = ExaSet_GetParamSetCod ();
ItsANewSet = (Exam.ExaCod <= 0);
/***** If I can edit exams ==> receive set from form *****/
ExaSet_ReceiveSetFieldsFromForm (&Set);
if (ExaSet_CheckSetFieldsReceivedFromForm (&Set))
{
/***** Create a new exam or update an existing one *****/
if (ItsANewSet)
ExaSet_CreateSet (&Set); // Add new set to database
else
ExaSet_UpdateSet (&Set); // Update set data in database
/***** Put forms to edit the set created or updated *****/
ExaSet_PutFormsEditionSet (&Exams,&Exam,&Set,
false); // No new set
/***** Show questions of the exam ready to be edited ******/
Exa_ListExamQuestions (&Exams,&Exam);
}
else
{
/***** Put forms to create/edit the set *****/
ExaSet_PutFormsEditionSet (&Exams,&Exam,&Set,ItsANewSet);
/***** Show exams or questions *****/
if (ItsANewSet)
/* Show exams again */
Exa_ListAllExams (&Exams);
else
/* Show questions of the exam ready to be edited */
Exa_ListExamQuestions (&Exams,&Exam);
}
}
static void ExaSet_ReceiveSetFieldsFromForm (struct ExaSet_Set *Set)
{
/***** Get set title *****/
Par_GetParToText ("Title",Set->Title,ExaSet_MAX_BYTES_TITLE);
/***** Get number of questions in set to appear in exam *****/
Set->NumQstsToExam = (unsigned) Par_GetParToUnsignedLong ("NumQstsToExam",
0,
UINT_MAX,
0);
}
static bool ExaSet_CheckSetFieldsReceivedFromForm (const struct ExaSet_Set *Set)
{
extern const char *Txt_Already_existed_a_set_of_questions_in_this_exam_with_the_title_X;
extern const char *Txt_You_must_specify_the_title_of_the_set_of_questions;
bool NewSetIsCorrect;
/***** Check if title is correct *****/
NewSetIsCorrect = true;
if (Set->Title[0]) // If there's an set title
{
/* If title of set was in database... */
if (ExaSet_CheckIfSimilarSetExists (Set))
{
NewSetIsCorrect = false;
Ale_ShowAlert (Ale_WARNING,Txt_Already_existed_a_set_of_questions_in_this_exam_with_the_title_X,
Set->Title);
}
}
else // If there is not a set title
{
NewSetIsCorrect = false;
Ale_ShowAlert (Ale_WARNING,Txt_You_must_specify_the_title_of_the_set_of_questions);
}
return NewSetIsCorrect;
}
/*****************************************************************************/
/********************* Put a form to create/edit an exam **********************/
/*****************************************************************************/
static void Exa_PutFormsEditionExam (struct Exa_Exams *Exams,
struct Exa_Exam *Exam,
char Txt[Cns_MAX_BYTES_TEXT + 1],
bool ItsANewExam)
{
extern const char *Hlp_ASSESSMENT_Exams_new_exam;
extern const char *Hlp_ASSESSMENT_Exams_edit_exam;
extern const char *The_ClassFormInBox[The_NUM_THEMES];
extern const char *Txt_New_exam;
extern const char *Txt_Edit_exam;
extern const char *Txt_Title;
extern const char *Txt_Maximum_grade;
extern const char *Txt_Result_visibility;
extern const char *Txt_Description;
extern const char *Txt_Create_exam;
extern const char *Txt_Save_changes;
/***** Begin form *****/
Exams->ExaCod = Exam->ExaCod;
Frm_StartForm (ItsANewExam ? ActNewExa :
ActChgExa);
Exa_PutParams (Exams);
/***** Begin box and table *****/
if (ItsANewExam)
Box_BoxTableBegin (NULL,Txt_New_exam,
NULL,NULL,
Hlp_ASSESSMENT_Exams_new_exam,Box_NOT_CLOSABLE,2);
else
Box_BoxTableBegin (NULL,
Exam->Title[0] ? Exam->Title :
Txt_Edit_exam,
NULL,NULL,
Hlp_ASSESSMENT_Exams_edit_exam,Box_NOT_CLOSABLE,2);
/***** Exam title *****/
HTM_TR_Begin (NULL);
/* Label */
Frm_LabelColumn ("RT","Title",Txt_Title);
/* Data */
HTM_TD_Begin ("class=\"LT\"");
HTM_INPUT_TEXT ("Title",Exa_MAX_CHARS_TITLE,Exam->Title,false,
"id=\"Title\" required=\"required\""
" class=\"TITLE_DESCRIPTION_WIDTH\"");
HTM_TD_End ();
HTM_TR_End ();
/***** Maximum grade *****/
HTM_TR_Begin (NULL);
HTM_TD_Begin ("class=\"%s RM\"",The_ClassFormInBox[Gbl.Prefs.Theme]);
HTM_TxtF ("%s:",Txt_Maximum_grade);
HTM_TD_End ();
HTM_TD_Begin ("class=\"LM\"");
HTM_INPUT_FLOAT ("MaxGrade",0.0,DBL_MAX,0.01,Exam->MaxGrade,false,
"required=\"required\"");
HTM_TD_End ();
HTM_TR_End ();
/***** Visibility of results *****/
HTM_TR_Begin (NULL);
HTM_TD_Begin ("class=\"%s RT\"",The_ClassFormInBox[Gbl.Prefs.Theme]);
HTM_TxtF ("%s:",Txt_Result_visibility);
HTM_TD_End ();
HTM_TD_Begin ("class=\"LB\"");
TstVis_PutVisibilityCheckboxes (Exam->Visibility);
HTM_TD_End ();
HTM_TR_End ();
/***** Exam text *****/
HTM_TR_Begin (NULL);
/* Label */
Frm_LabelColumn ("RT","Txt",Txt_Description);
/* Data */
HTM_TD_Begin ("class=\"LT\"");
HTM_TEXTAREA_Begin ("id=\"Txt\" name=\"Txt\" rows=\"5\""
" class=\"TITLE_DESCRIPTION_WIDTH\"");
HTM_Txt (Txt);
HTM_TEXTAREA_End ();
HTM_TD_End ();
HTM_TR_End ();
/***** End table, send button and end box *****/
if (ItsANewExam)
Box_BoxTableWithButtonEnd (Btn_CREATE_BUTTON,Txt_Create_exam);
else
Box_BoxTableWithButtonEnd (Btn_CONFIRM_BUTTON,Txt_Save_changes);
/***** End form *****/
Frm_EndForm ();
}
/*****************************************************************************/
/********************** Receive form to create a new exam ********************/
/*****************************************************************************/
void Exa_RecFormExam (void)
{
struct Exa_Exams Exams;
struct Exa_Exam Exam;
bool ItsANewExam;
char Txt[Cns_MAX_BYTES_TEXT + 1];
/***** Check if I can edit exams *****/
if (!Exa_CheckIfICanEditExams ())
Lay_NoPermissionExit ();
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Reset exam *****/
Exa_ResetExam (&Exam);
/***** Get parameters *****/
Exa_GetParams (&Exams);
if (Exams.ExaCod <= 0)
Lay_WrongExamExit ();
Exam.ExaCod = Exams.ExaCod;
ItsANewExam = (Exam.ExaCod <= 0);
/***** If I can edit exams ==> receive exam from form *****/
Exa_ReceiveExamFieldsFromForm (&Exam,Txt);
if (Exa_CheckExamFieldsReceivedFromForm (&Exam))
{
/***** Create a new exam or update an existing one *****/
if (ItsANewExam)
Exa_CreateExam (&Exam,Txt); // Add new exam to database
else
Exa_UpdateExam (&Exam,Txt); // Update exam data in database
/***** Put forms to edit the exam created or updated *****/
Exa_PutFormsEditionExam (&Exams,&Exam,Txt,
false); // No new exam
/***** Show questions of the exam ready to be edited ******/
Exa_ListExamQuestions (&Exams,&Exam);
}
else
{
/***** Put forms to create/edit the exam *****/
Exa_PutFormsEditionExam (&Exams,&Exam,Txt,ItsANewExam);
/***** Show exams or questions *****/
if (ItsANewExam)
/* Show exams again */
Exa_ListAllExams (&Exams);
else
/* Show questions of the exam ready to be edited */
Exa_ListExamQuestions (&Exams,&Exam);
}
}
static void Exa_ReceiveExamFieldsFromForm (struct Exa_Exam *Exam,
char Txt[Cns_MAX_BYTES_TEXT + 1])
{
char MaxGradeStr[64];
/***** Get exam title *****/
Par_GetParToText ("Title",Exam->Title,Exa_MAX_BYTES_TITLE);
/***** Get maximum grade *****/
Par_GetParToText ("MaxGrade",MaxGradeStr,sizeof (MaxGradeStr) - 1);
Exam->MaxGrade = Str_GetDoubleFromStr (MaxGradeStr);
if (Exam->MaxGrade < 0.0) // Only positive values allowed
Exam->MaxGrade = 0.0;
/***** Get visibility *****/
Exam->Visibility = TstVis_GetVisibilityFromForm ();
/***** Get exam text *****/
Par_GetParToHTML ("Txt",Txt,Cns_MAX_BYTES_TEXT); // Store in HTML format (not rigorous)
}
static bool Exa_CheckExamFieldsReceivedFromForm (const struct Exa_Exam *Exam)
{
extern const char *Txt_Already_existed_an_exam_with_the_title_X;
extern const char *Txt_You_must_specify_the_title_of_the_exam;
bool NewExamIsCorrect;
/***** Check if title is correct *****/
NewExamIsCorrect = true;
if (Exam->Title[0]) // If there's an exam title
{
/* If title of exam was in database... */
if (Exa_CheckIfSimilarExamExists (Exam))
{
NewExamIsCorrect = false;
Ale_ShowAlert (Ale_WARNING,Txt_Already_existed_an_exam_with_the_title_X,
Exam->Title);
}
}
else // If there is not an exam title
{
NewExamIsCorrect = false;
Ale_ShowAlert (Ale_WARNING,Txt_You_must_specify_the_title_of_the_exam);
}
return NewExamIsCorrect;
}
/*****************************************************************************/
/********************** Create a new set of questions ************************/
/*****************************************************************************/
static void ExaSet_CreateSet (struct ExaSet_Set *Set)
{
extern const char *Txt_Created_new_set_of_questions_X;
/***** Create a new exam *****/
Set->SetCod =
DB_QueryINSERTandReturnCode ("can not create new set of questions",
"INSERT INTO exa_sets"
" (ExaCod,SetInd,NumQstsToExam,Title)"
" VALUES"
" (%ld,'N',%ld,%.15lg,%u,'%s','%s')",
Set->ExaCod,
Set->SetInd,
Set->NumQstsToExam,
Set->Title);
/***** Write success message *****/
Ale_ShowAlert (Ale_SUCCESS,Txt_Created_new_set_of_questions_X,
Set->Title);
}
/*****************************************************************************/
/******************** Update an existing set of questions ********************/
/*****************************************************************************/
static void ExaSet_UpdateSet (struct ExaSet_Set *Set)
{
extern const char *Txt_The_set_of_questions_has_been_modified;
/***** Update the data of the set of questions *****/
DB_QueryUPDATE ("can not update set of questions",
"UPDATE exa_exams"
" SET ExaCod=%ld,"
"SetInd=%u,"
"NumQstsToExam=%u,"
"Title='%s'"
" WHERE SetCod=%ld",
Set->ExaCod,
Set->SetInd,
Set->NumQstsToExam,
Set->Title,
Set->SetCod);
/***** Write success message *****/
Ale_ShowAlert (Ale_SUCCESS,Txt_The_set_of_questions_has_been_modified);
}
/*****************************************************************************/
/**************************** Create a new exam ******************************/
/*****************************************************************************/
static void Exa_CreateExam (struct Exa_Exam *Exam,const char *Txt)
{
extern const char *Txt_Created_new_exam_X;
/***** Create a new exam *****/
Str_SetDecimalPointToUS (); // To write the decimal point as a dot
Exam->ExaCod =
DB_QueryINSERTandReturnCode ("can not create new exam",
"INSERT INTO exa_exams"
" (CrsCod,Hidden,UsrCod,MaxGrade,Visibility,Title,Txt)"
" VALUES"
" (%ld,'N',%ld,%.15lg,%u,'%s','%s')",
Gbl.Hierarchy.Crs.CrsCod,
Gbl.Usrs.Me.UsrDat.UsrCod,
Exam->MaxGrade,
Exam->Visibility,
Exam->Title,
Txt);
Str_SetDecimalPointToLocal (); // Return to local system
/***** Write success message *****/
Ale_ShowAlert (Ale_SUCCESS,Txt_Created_new_exam_X,
Exam->Title);
}
/*****************************************************************************/
/************************* Update an existing exam *************************/
/*****************************************************************************/
static void Exa_UpdateExam (struct Exa_Exam *Exam,const char *Txt)
{
extern const char *Txt_The_exam_has_been_modified;
/***** Update the data of the exam *****/
Str_SetDecimalPointToUS (); // To write the decimal point as a dot
DB_QueryUPDATE ("can not update exam",
"UPDATE exa_exams"
" SET CrsCod=%ld,"
"MaxGrade=%.15lg,"
"Visibility=%u,"
"Title='%s',"
"Txt='%s'"
" WHERE ExaCod=%ld",
Gbl.Hierarchy.Crs.CrsCod,
Exam->MaxGrade,
Exam->Visibility,
Exam->Title,
Txt,
Exam->ExaCod);
Str_SetDecimalPointToLocal (); // Return to local system
/***** Write success message *****/
Ale_ShowAlert (Ale_SUCCESS,Txt_The_exam_has_been_modified);
}
/*****************************************************************************/
/******************* Get number of questions of an exam *********************/
/*****************************************************************************/
unsigned Exa_GetNumQstsExam (long ExaCod)
{
/***** Get nuumber of questions in an exam from database *****/
return
(unsigned) DB_QueryCOUNT ("can not get number of questions of an exam",
"SELECT COUNT(*) FROM exa_questions"
" WHERE ExaCod=%ld",
ExaCod);
}
/*****************************************************************************/
/************ Request the creation or edition of an set of questions *************/
/*****************************************************************************/
void ExaSet_RequestCreatOrEditSet (void)
{
struct Exa_Exams Exams;
struct Exa_Exam Exam;
struct ExaSet_Set Set;
bool ItsANewSet;
/***** Check if I can edit exams *****/
if (!Exa_CheckIfICanEditExams ())
Lay_NoPermissionExit ();
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Reset exam *****/
Exa_ResetExam (&Exam);
/***** Create set of questions *****/
ExaSet_ResetSet (&Set);
/***** Get parameters *****/
Exa_GetParams (&Exams);
if (Exams.ExaCod <= 0)
Lay_WrongExamExit ();
Exam.ExaCod = Exams.ExaCod;
ItsANewSet = ((Set.SetCod = ExaSet_GetParamSetCod ()) <= 0);
Lay_ShowErrorAndExit ("Wrong set.");
/***** Get exam data *****/
Exa_GetDataOfExamByCod (&Exam);
/***** Get set data *****/
if (ItsANewSet)
/* Initialize to empty set */
ExaSet_ResetSet (&Set);
else
/* Get set data from database */
ExaSet_GetDataOfSetByCod (&Set);
/***** Put forms to create/edit a set *****/
ExaSet_PutFormsEditionSet (&Exams,&Exam,&Set,ItsANewSet);
/***** Show exams or questions *****/
if (ItsANewSet)
/* Show exams again */
Exa_ListAllExams (&Exams);
else
{
/* Show sets of the exam ready to be edited */
Exa_ListExamSets (&Exams,&Exam);
/* Show questions of the exam ready to be edited */
Exa_ListExamQuestions (&Exams,&Exam);
}
}
/*****************************************************************************/
/*************** Put a form to edit/create a question in exam ****************/
/*****************************************************************************/
void Exa_RequestNewQuestion (void)
{
struct Exa_Exams Exams;
struct Exa_Exam Exam;
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Reset exam *****/
Exa_ResetExam (&Exam);
/***** Get parameters *****/
Exa_GetParams (&Exams);
if (Exams.ExaCod <= 0)
Lay_WrongExamExit ();
Exam.ExaCod = Exams.ExaCod;
/***** Get data of exam from database *****/
Exa_GetDataOfExamByCod (&Exam);
/***** Check if exam has events *****/
if (Exa_CheckIfEditable (&Exam))
{
/***** Show form to create a new question in this exam *****/
Exams.ExaCod = Exam.ExaCod;
Tst_RequestSelectTestsForExam (&Exams);
}
else
Lay_NoPermissionExit ();
/***** Show current exam *****/
Exa_ShowOnlyOneExam (&Exams,&Exam,
true, // List exam questions
false); // Do not put form to start new event
}
/*****************************************************************************/
/**************** List several test questions for selection ******************/
/*****************************************************************************/
void Exa_ListQuestionsToSelect (void)
{
struct Exa_Exams Exams;
struct Exa_Exam Exam;
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Reset exam *****/
Exa_ResetExam (&Exam);
/***** Get parameters *****/
Exa_GetParams (&Exams);
if (Exams.ExaCod <= 0)
Lay_WrongExamExit ();
Exam.ExaCod = Exams.ExaCod;
/***** Get data of exam from database *****/
Exa_GetDataOfExamByCod (&Exam);
/***** Check if exam has events *****/
if (Exa_CheckIfEditable (&Exam))
{
/***** List several test questions for selection *****/
Exams.ExaCod = Exam.ExaCod;
Tst_ListQuestionsToSelectForExam (&Exams);
}
else
Lay_NoPermissionExit ();
}
/*****************************************************************************/
/**************** Write parameter with index of set of questions *****************/
/*****************************************************************************/
void Exa_PutParamSetInd (unsigned SetInd)
{
Par_PutHiddenParamUnsigned (NULL,"SetInd",SetInd);
}
/*****************************************************************************/
/****************** Write parameter with index of question *******************/
/*****************************************************************************/
void Exa_PutParamQstInd (unsigned QstInd)
{
Par_PutHiddenParamUnsigned (NULL,"QstInd",QstInd);
}
/*****************************************************************************/
/******************* Get parameter with index of question ********************/
/*****************************************************************************/
unsigned Exa_GetParamQstInd (void)
{
long QstInd;
QstInd = Par_GetParToLong ("QstInd");
if (QstInd < 0)
Lay_ShowErrorAndExit ("Wrong question index.");
return (unsigned) QstInd;
}
/*****************************************************************************/
/********************** Remove answers of an exam question ********************/
/*****************************************************************************/
static void Exa_RemAnswersOfAQuestion (long ExaCod,unsigned QstInd)
{
/***** Remove answers from all events of this exam *****/
DB_QueryDELETE ("can not remove the answers of a question",
"DELETE FROM exa_answers"
" USING exa_events,exa_answers"
" WHERE exa_events.ExaCod=%ld" // From all events of this exam...
" AND exa_events.EvtCod=exa_answers.EvtCod"
" AND exa_answers.QstInd=%u", // ...remove only answers to this question
ExaCod,QstInd);
}
/*****************************************************************************/
/************ Get question code given exam and index of question *************/
/*****************************************************************************/
long Exa_GetQstCodFromQstInd (long ExaCod,unsigned QstInd)
{
MYSQL_RES *mysql_res;
MYSQL_ROW row;
long QstCod;
/***** Get question code of thw question to be moved up *****/
if (!DB_QuerySELECT (&mysql_res,"can not get question code",
"SELECT QstCod FROM exa_questions"
" WHERE ExaCod=%ld AND QstInd=%u",
ExaCod,QstInd))
Lay_ShowErrorAndExit ("Error: wrong question index.");
/***** Get question code (row[0]) *****/
row = mysql_fetch_row (mysql_res);
if ((QstCod = Str_ConvertStrCodToLongCod (row[0])) <= 0)
Lay_ShowErrorAndExit ("Error: wrong question code.");
/***** Free structure that stores the query result *****/
DB_FreeMySQLResult (&mysql_res);
return QstCod;
}
/*****************************************************************************/
/********************* Get maximum set index in an exam **********************/
/*****************************************************************************/
// Question index can be 1, 2, 3...
// Return 0 if no questions
static unsigned Exa_GetMaxSetIndexInExam (long ExaCod)
{
MYSQL_RES *mysql_res;
MYSQL_ROW row;
unsigned SetInd = 0;
/***** Get maximum set index in an exam from database *****/
DB_QuerySELECT (&mysql_res,"can not get max set index",
"SELECT MAX(SetInd)"
" FROM exa_sets"
" WHERE ExaCod=%ld",
ExaCod);
row = mysql_fetch_row (mysql_res);
if (row[0]) // There are sets
if (sscanf (row[0],"%u",&SetInd) != 1)
Lay_ShowErrorAndExit ("Error when getting max set index.");
/***** Free structure that stores the query result *****/
DB_FreeMySQLResult (&mysql_res);
return SetInd;
}
/*****************************************************************************/
/****************** Get maximum question index in an exam *********************/
/*****************************************************************************/
// Question index can be 1, 2, 3...
// Return 0 if no questions
static unsigned Exa_GetMaxQuestionIndexInExam (long ExaCod)
{
MYSQL_RES *mysql_res;
MYSQL_ROW row;
unsigned QstInd = 0;
/***** Get maximum question index in an exam from database *****/
DB_QuerySELECT (&mysql_res,"can not get max question index",
"SELECT MAX(QstInd)"
" FROM exa_questions"
" WHERE ExaCod=%ld",
ExaCod);
row = mysql_fetch_row (mysql_res);
if (row[0]) // There are questions
if (sscanf (row[0],"%u",&QstInd) != 1)
Lay_ShowErrorAndExit ("Error when getting max question index.");
/***** Free structure that stores the query result *****/
DB_FreeMySQLResult (&mysql_res);
return QstInd;
}
/*****************************************************************************/
/*********** Get previous question index to a given index in an exam **********/
/*****************************************************************************/
// Input question index can be 1, 2, 3... n-1
// Return question index will be 1, 2, 3... n if previous question exists, or 0 if no previous question
unsigned Exa_GetPrevQuestionIndexInExam (long ExaCod,unsigned QstInd)
{
MYSQL_RES *mysql_res;
MYSQL_ROW row;
unsigned PrevQstInd = 0;
/***** Get previous question index in an exam from database *****/
// Although indexes are always continuous...
// ...this implementation works even with non continuous indexes
if (!DB_QuerySELECT (&mysql_res,"can not get previous question index",
"SELECT MAX(QstInd) FROM exa_questions"
" WHERE ExaCod=%ld AND QstInd<%u",
ExaCod,QstInd))
Lay_ShowErrorAndExit ("Error: previous question index not found.");
/***** Get previous question index (row[0]) *****/
row = mysql_fetch_row (mysql_res);
if (row)
if (row[0])
if (sscanf (row[0],"%u",&PrevQstInd) != 1)
Lay_ShowErrorAndExit ("Error when getting previous question index.");
/***** Free structure that stores the query result *****/
DB_FreeMySQLResult (&mysql_res);
return PrevQstInd;
}
/*****************************************************************************/
/************* Get next question index to a given index in an exam ************/
/*****************************************************************************/
// Input question index can be 0, 1, 2, 3... n-1
// Return question index will be 1, 2, 3... n if next question exists, or 0 if no next question
unsigned Exa_GetNextQuestionIndexInExam (long ExaCod,unsigned QstInd)
{
MYSQL_RES *mysql_res;
MYSQL_ROW row;
unsigned NextQstInd = ExaEvt_AFTER_LAST_QUESTION; // End of questions has been reached
/***** Get next question index in an exam from database *****/
// Although indexes are always continuous...
// ...this implementation works even with non continuous indexes
if (!DB_QuerySELECT (&mysql_res,"can not get next question index",
"SELECT MIN(QstInd) FROM exa_questions"
" WHERE ExaCod=%ld AND QstInd>%u",
ExaCod,QstInd))
Lay_ShowErrorAndExit ("Error: next question index not found.");
/***** Get next question index (row[0]) *****/
row = mysql_fetch_row (mysql_res);
if (row)
if (row[0])
if (sscanf (row[0],"%u",&NextQstInd) != 1)
Lay_ShowErrorAndExit ("Error when getting next question index.");
/***** Free structure that stores the query result *****/
DB_FreeMySQLResult (&mysql_res);
return NextQstInd;
}
/*****************************************************************************/
/************************* List the sets of an exam **************************/
/*****************************************************************************/
static void Exa_ListExamSets (struct Exa_Exams *Exams,struct Exa_Exam *Exam)
{
extern const char *Hlp_ASSESSMENT_Exams_question_sets;
extern const char *Txt_Sets_of_questions;
extern const char *Txt_This_exam_has_no_sets_of_questions;
MYSQL_RES *mysql_res;
unsigned NumSets;
bool ICanEditSets = Exa_CheckIfEditable (Exam);
/***** Get data of set of questionss from database *****/
NumSets = (unsigned)
DB_QuerySELECT (&mysql_res,"can not get exam set of questionss",
"SELECT SetInd," // row[0]
"SetCod" // row[1]
" FROM exa_sets"
" WHERE ExaCod=%ld"
" ORDER BY SetInd",
Exam->ExaCod);
/***** Begin box *****/
Exams->ExaCod = Exam->ExaCod;
if (ICanEditSets)
Box_BoxBegin (NULL,Txt_Sets_of_questions,
Exa_PutIconToAddNewSets,Exams,
Hlp_ASSESSMENT_Exams_question_sets,Box_NOT_CLOSABLE);
else
Box_BoxBegin (NULL,Txt_Sets_of_questions,
NULL,NULL,
Hlp_ASSESSMENT_Exams_question_sets,Box_NOT_CLOSABLE);
/***** Show table with sets *****/
if (NumSets)
ExaSet_ListOneOrMoreSetsForEdition (Exams,
Exam->ExaCod,NumSets,mysql_res,
ICanEditSets);
else // This exam has no sets
Ale_ShowAlert (Ale_INFO,Txt_This_exam_has_no_sets_of_questions);
/***** Put button to add a new set in this exam *****/
if (ICanEditSets) // I can edit set of questionss
Exa_PutButtonToAddNewSet (Exams);
/***** Free structure that stores the query result *****/
DB_FreeMySQLResult (&mysql_res);
/***** End box *****/
Box_BoxEnd ();
}
/*****************************************************************************/
/************************ List the questions of an exam ***********************/
/*****************************************************************************/
static void Exa_ListExamQuestions (struct Exa_Exams *Exams,struct Exa_Exam *Exam)
{
extern const char *Hlp_ASSESSMENT_Exams_questions;
extern const char *Txt_Questions;
extern const char *Txt_This_exam_has_no_questions;
MYSQL_RES *mysql_res;
unsigned NumQsts;
bool ICanEditQuestions = Exa_CheckIfEditable (Exam);
/***** Get data of questions from database *****/
NumQsts = (unsigned)
DB_QuerySELECT (&mysql_res,"can not get exam questions",
"SELECT QstInd," // row[0]
"QstCod" // row[1]
" FROM exa_questions"
" WHERE ExaCod=%ld"
" ORDER BY QstInd",
Exam->ExaCod);
/***** Begin box *****/
Exams->ExaCod = Exam->ExaCod;
if (ICanEditQuestions)
Box_BoxBegin (NULL,Txt_Questions,
Exa_PutIconToAddNewQuestions,Exams,
Hlp_ASSESSMENT_Exams_questions,Box_NOT_CLOSABLE);
else
Box_BoxBegin (NULL,Txt_Questions,
NULL,NULL,
Hlp_ASSESSMENT_Exams_questions,Box_NOT_CLOSABLE);
/***** Show table with questions *****/
if (NumQsts)
Exa_ListOneOrMoreQuestionsForEdition (Exams,
Exam->ExaCod,NumQsts,mysql_res,
ICanEditQuestions);
else // This exam has no questions
Ale_ShowAlert (Ale_INFO,Txt_This_exam_has_no_questions);
/***** Put button to add a new question in this exam *****/
if (ICanEditQuestions) // I can edit questions
Exa_PutButtonToAddNewQuestions (Exams);
/***** Free structure that stores the query result *****/
DB_FreeMySQLResult (&mysql_res);
/***** End box *****/
Box_BoxEnd ();
}
/*****************************************************************************/
/************************* List exam sets for edition ************************/
/*****************************************************************************/
static void ExaSet_ListOneOrMoreSetsForEdition (struct Exa_Exams *Exams,
long ExaCod,unsigned NumSets,
MYSQL_RES *mysql_res,
bool ICanEditSets)
{
extern const char *Txt_Sets_of_questions;
extern const char *Txt_No_INDEX;
extern const char *Txt_Code;
extern const char *Txt_Tags;
extern const char *Txt_Set_of_questions;
extern const char *Txt_Move_up_X;
extern const char *Txt_Move_down_X;
extern const char *Txt_Movement_not_allowed;
unsigned NumSet;
MYSQL_ROW row;
struct ExaSet_Set Set;
unsigned SetInd;
unsigned MaxSetInd;
char StrSetInd[Cns_MAX_DECIMAL_DIGITS_UINT + 1];
// bool SetExists;
/***** Get maximum question index *****/
MaxSetInd = Exa_GetMaxSetIndexInExam (ExaCod);
/***** Write the heading *****/
HTM_TABLE_BeginWideMarginPadding (2);
HTM_TR_Begin (NULL);
HTM_TH_Empty (1);
HTM_TH (1,1,"CT",Txt_No_INDEX);
HTM_TH (1,1,"CT",Txt_Code);
HTM_TH (1,1,"CT",Txt_Tags);
HTM_TH (1,1,"CT",Txt_Set_of_questions);
HTM_TR_End ();
/***** Write rows *****/
for (NumSet = 0;
NumSet < NumSets;
NumSet++)
{
Gbl.RowEvenOdd = NumSet % 2;
/***** Create set of questions *****/
ExaSet_ResetSet (&Set);
/***** Get set data *****/
row = mysql_fetch_row (mysql_res);
/*
row[0] SetInd
row[1] SetCod
*/
/* Get set index (row[0]) */
SetInd = Str_ConvertStrToUnsigned (row[0]);
snprintf (StrSetInd,sizeof (SetInd),
"%u",
SetInd);
/* Get set code (row[1]) */
Set.SetCod = Str_ConvertStrCodToLongCod (row[1]);
/***** Icons *****/
Exams->ExaCod = ExaCod;
Exams->SetInd = SetInd;
HTM_TR_Begin (NULL);
HTM_TD_Begin ("class=\"BT%u\"",Gbl.RowEvenOdd);
/* Put icon to remove the set */
if (ICanEditSets)
{
Frm_StartForm (ActReqRemExaSet);
Exa_PutParams (Exams);
Exa_PutParamQstInd (SetInd);
Ico_PutIconRemove ();
Frm_EndForm ();
}
else
Ico_PutIconRemovalNotAllowed ();
/* Put icon to move up the question */
if (ICanEditSets && SetInd > 1)
{
Lay_PutContextualLinkOnlyIcon (ActUp_ExaSet,NULL,
Exa_PutParamsOneSet,Exams,
"arrow-up.svg",
Str_BuildStringStr (Txt_Move_up_X,
StrSetInd));
Str_FreeString ();
}
else
Ico_PutIconOff ("arrow-up.svg",Txt_Movement_not_allowed);
/* Put icon to move down the set */
if (ICanEditSets && SetInd < MaxSetInd)
{
Lay_PutContextualLinkOnlyIcon (ActDwnExaSet,NULL,
Exa_PutParamsOneSet,Exams,
"arrow-down.svg",
Str_BuildStringStr (Txt_Move_down_X,
StrSetInd));
Str_FreeString ();
}
else
Ico_PutIconOff ("arrow-down.svg",Txt_Movement_not_allowed);
/* Put icon to edit the set */
if (ICanEditSets)
// Ico_PutContextualIconToEdit (ActEdiOneExaSet,NULL,
// Exa_PutParamSetCod,&Set.SetCod);
Ico_PutContextualIconToEdit (ActEdiOneTstQst,NULL, // TODO: Change for ActEdiOneExaSet
Exa_PutParamSetCod,&Set.SetCod);
HTM_TD_End ();
/***** Set *****/
// SetExists = Exa_GetSetDataFromDB (&Set);
// Exa_ListSetForEdition (&Set,SetInd,SetExists);
HTM_TR_End ();
}
/***** End table *****/
HTM_TABLE_End ();
}
/*****************************************************************************/
/************************** Question set constructor *************************/
/*****************************************************************************/
static void ExaSet_ResetSet (struct ExaSet_Set *Set)
{
Set->ExaCod = -1L;
Set->SetCod = -1L;
Set->SetInd = 0;
Set->Title[0] = '\0';
Set->NumQstsToExam = 0;
}
/*****************************************************************************/
/*************** Put parameter with set code to edit, remove... **************/
/*****************************************************************************/
static void Exa_PutParamSetCod (void *SetCod) // Should be a pointer to long
{
if (SetCod)
if (*((long *) SetCod) > 0) // If set exists
Par_PutHiddenParamLong (NULL,"SetCod",*((long *) SetCod));
}
/*****************************************************************************/
/********************* List exam questions for edition ***********************/
/*****************************************************************************/
static void Exa_ListOneOrMoreQuestionsForEdition (struct Exa_Exams *Exams,
long ExaCod,unsigned NumQsts,
MYSQL_RES *mysql_res,
bool ICanEditQuestions)
{
extern const char *Txt_Questions;
extern const char *Txt_No_INDEX;
extern const char *Txt_Code;
extern const char *Txt_Tags;
extern const char *Txt_Question;
extern const char *Txt_Move_up_X;
extern const char *Txt_Move_down_X;
extern const char *Txt_Movement_not_allowed;
unsigned NumQst;
MYSQL_ROW row;
struct Tst_Question Question;
unsigned QstInd;
unsigned MaxQstInd;
char StrQstInd[Cns_MAX_DECIMAL_DIGITS_UINT + 1];
bool QuestionExists;
/***** Get maximum question index *****/
MaxQstInd = Exa_GetMaxQuestionIndexInExam (ExaCod);
/***** Write the heading *****/
HTM_TABLE_BeginWideMarginPadding (2);
HTM_TR_Begin (NULL);
HTM_TH_Empty (1);
HTM_TH (1,1,"CT",Txt_No_INDEX);
HTM_TH (1,1,"CT",Txt_Code);
HTM_TH (1,1,"CT",Txt_Tags);
HTM_TH (1,1,"CT",Txt_Question);
HTM_TR_End ();
/***** Write rows *****/
for (NumQst = 0;
NumQst < NumQsts;
NumQst++)
{
Gbl.RowEvenOdd = NumQst % 2;
/***** Create test question *****/
Tst_QstConstructor (&Question);
/***** Get question data *****/
row = mysql_fetch_row (mysql_res);
/*
row[0] QstInd
row[1] QstCod
*/
/* Get question index (row[0]) */
QstInd = Str_ConvertStrToUnsigned (row[0]);
snprintf (StrQstInd,sizeof (StrQstInd),
"%u",
QstInd);
/* Get question code (row[1]) */
Question.QstCod = Str_ConvertStrCodToLongCod (row[1]);
/***** Icons *****/
Exams->ExaCod = ExaCod;
Exams->QstInd = QstInd;
HTM_TR_Begin (NULL);
HTM_TD_Begin ("class=\"BT%u\"",Gbl.RowEvenOdd);
/* Put icon to remove the question */
if (ICanEditQuestions)
{
Frm_StartForm (ActReqRemExaQst);
Exa_PutParams (Exams);
Exa_PutParamQstInd (QstInd);
Ico_PutIconRemove ();
Frm_EndForm ();
}
else
Ico_PutIconRemovalNotAllowed ();
/* Put icon to move up the question */
if (ICanEditQuestions && QstInd > 1)
{
Lay_PutContextualLinkOnlyIcon (ActUp_ExaQst,NULL,
Exa_PutParamsOneQst,Exams,
"arrow-up.svg",
Str_BuildStringStr (Txt_Move_up_X,
StrQstInd));
Str_FreeString ();
}
else
Ico_PutIconOff ("arrow-up.svg",Txt_Movement_not_allowed);
/* Put icon to move down the question */
if (ICanEditQuestions && QstInd < MaxQstInd)
{
Lay_PutContextualLinkOnlyIcon (ActDwnExaQst,NULL,
Exa_PutParamsOneQst,Exams,
"arrow-down.svg",
Str_BuildStringStr (Txt_Move_down_X,
StrQstInd));
Str_FreeString ();
}
else
Ico_PutIconOff ("arrow-down.svg",Txt_Movement_not_allowed);
/* Put icon to edit the question */
if (ICanEditQuestions)
Ico_PutContextualIconToEdit (ActEdiOneTstQst,NULL,
Tst_PutParamQstCod,&Question.QstCod);
HTM_TD_End ();
/***** Question *****/
QuestionExists = Tst_GetQstDataFromDB (&Question);
Exa_ListQuestionForEdition (&Question,QstInd,QuestionExists);
HTM_TR_End ();
/***** Destroy test question *****/
Tst_QstDestructor (&Question);
}
/***** End table *****/
HTM_TABLE_End ();
}
/*****************************************************************************/
/********************** List exam question for edition ***********************/
/*****************************************************************************/
static void Exa_ListQuestionForEdition (const struct Tst_Question *Question,
unsigned QstInd,bool QuestionExists)
{
extern const char *Txt_Question_removed;
/***** Number of question and answer type (row[1]) *****/
HTM_TD_Begin ("class=\"RT COLOR%u\"",Gbl.RowEvenOdd);
Tst_WriteNumQst (QstInd);
if (QuestionExists)
Tst_WriteAnswerType (Question->Answer.Type);
HTM_TD_End ();
/***** Write question code *****/
HTM_TD_Begin ("class=\"DAT_SMALL CT COLOR%u\"",Gbl.RowEvenOdd);
HTM_TxtF ("%ld&nbsp;",Question->QstCod);
HTM_TD_End ();
/***** Write the question tags *****/
HTM_TD_Begin ("class=\"LT COLOR%u\"",Gbl.RowEvenOdd);
if (QuestionExists)
Tst_GetAndWriteTagsQst (Question->QstCod);
HTM_TD_End ();
/***** Write stem (row[3]) and media *****/
HTM_TD_Begin ("class=\"LT COLOR%u\"",Gbl.RowEvenOdd);
if (QuestionExists)
{
/* Write stem */
Tst_WriteQstStem (Question->Stem,"TEST_EDI",
true); // Visible
/* Show media */
Med_ShowMedia (&Question->Media,
"TEST_MED_EDIT_LIST_STEM_CONTAINER",
"TEST_MED_EDIT_LIST_STEM");
/* Show feedback */
Tst_WriteQstFeedback (Question->Feedback,"TEST_EDI_LIGHT");
/* Show answers */
Tst_WriteAnswersListing (Question);
}
else
{
HTM_SPAN_Begin ("class=\"DAT_LIGHT\"");
HTM_Txt (Txt_Question_removed);
HTM_SPAN_End ();
}
HTM_TD_End ();
}
/*****************************************************************************/
/*************** Put icon to add a new set of questions to exam ******************/
/*****************************************************************************/
static void Exa_PutIconToAddNewSets (void *Exams)
{
extern const char *Txt_New_set_of_questions;
/***** Put form to create a new set of questions *****/
Ico_PutContextualIconToAdd (ActFrmNewExaSet,NULL,
Exa_PutParams,Exams,
Txt_New_set_of_questions);
}
/*****************************************************************************/
/***************** Put icon to add a new questions to exam *******************/
/*****************************************************************************/
static void Exa_PutIconToAddNewQuestions (void *Exams)
{
extern const char *Txt_Add_questions;
/***** Put form to create a new question *****/
Ico_PutContextualIconToAdd (ActAddOneExaQst,NULL,
Exa_PutParams,Exams,
Txt_Add_questions);
}
/*****************************************************************************/
/*************** Put button to add new set of questions to exam ******************/
/*****************************************************************************/
static void Exa_PutButtonToAddNewSet (struct Exa_Exams *Exams)
{
extern const char *Txt_New_set_of_questions;
Frm_StartForm (ActFrmNewExaSet);
Exa_PutParams (Exams);
Btn_PutConfirmButton (Txt_New_set_of_questions);
Frm_EndForm ();
}
/*****************************************************************************/
/***************** Put button to add new questions to exam *******************/
/*****************************************************************************/
static void Exa_PutButtonToAddNewQuestions (struct Exa_Exams *Exams)
{
extern const char *Txt_Add_questions;
Frm_StartForm (ActAddOneExaQst);
Exa_PutParams (Exams);
Btn_PutConfirmButton (Txt_Add_questions);
Frm_EndForm ();
}
/*****************************************************************************/
/******************** Add selected test questions to exam ********************/
/*****************************************************************************/
void Exa_AddQuestionsToExam (void)
{
extern const char *Txt_No_questions_have_been_added;
struct Exa_Exams Exams;
struct Exa_Exam Exam;
const char *Ptr;
char LongStr[Cns_MAX_DECIMAL_DIGITS_LONG + 1];
long QstCod;
unsigned MaxQstInd;
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Reset exam *****/
Exa_ResetExam (&Exam);
/***** Get parameters *****/
Exa_GetParams (&Exams);
if (Exams.ExaCod <= 0)
Lay_WrongExamExit ();
Exam.ExaCod = Exams.ExaCod;
/***** Get data of exam from database *****/
Exa_GetDataOfExamByCod (&Exam);
/***** Check if exam has events *****/
if (Exa_CheckIfEditable (&Exam))
{
/***** Get selected questions *****/
/* Allocate space for selected question codes */
Exa_AllocateListSelectedQuestions (&Exams);
/* Get question codes */
Par_GetParMultiToText ("QstCods",Exams.ListQuestions,
Exa_MAX_BYTES_LIST_SELECTED_QUESTIONS);
/* Check number of questions */
if (Exa_CountNumQuestionsInList (&Exams)) // If questions selected...
{
/***** Insert questions in database *****/
Ptr = Exams.ListQuestions;
while (*Ptr)
{
/* Get next code */
Par_GetNextStrUntilSeparParamMult (&Ptr,LongStr,Cns_MAX_DECIMAL_DIGITS_LONG);
if (sscanf (LongStr,"%ld",&QstCod) != 1)
Lay_ShowErrorAndExit ("Wrong question code.");
/* Get current maximum index */
MaxQstInd = Exa_GetMaxQuestionIndexInExam (Exam.ExaCod); // -1 if no questions
/* Insert question in the table of questions */
DB_QueryINSERT ("can not create question",
"INSERT INTO exa_questions"
" (ExaCod,QstCod,QstInd)"
" VALUES"
" (%ld,%ld,%u)",
Exam.ExaCod,QstCod,MaxQstInd + 1);
}
}
else
Ale_ShowAlert (Ale_WARNING,Txt_No_questions_have_been_added);
/***** Free space for selected question codes *****/
Exa_FreeListsSelectedQuestions (&Exams);
}
else
Lay_NoPermissionExit ();
/***** Show current exam *****/
Exa_ShowOnlyOneExam (&Exams,&Exam,
true, // List exam questions
false); // Do not put form to start new event
}
/*****************************************************************************/
/****************** Allocate memory for list of questions ********************/
/*****************************************************************************/
static void Exa_AllocateListSelectedQuestions (struct Exa_Exams *Exams)
{
if (!Exams->ListQuestions)
{
if ((Exams->ListQuestions = (char *) malloc (Exa_MAX_BYTES_LIST_SELECTED_QUESTIONS + 1)) == NULL)
Lay_NotEnoughMemoryExit ();
Exams->ListQuestions[0] = '\0';
}
}
/*****************************************************************************/
/*********** Free memory used by list of selected question codes *************/
/*****************************************************************************/
static void Exa_FreeListsSelectedQuestions (struct Exa_Exams *Exams)
{
if (Exams->ListQuestions)
{
free (Exams->ListQuestions);
Exams->ListQuestions = NULL;
}
}
/*****************************************************************************/
/**** Count the number of questions in the list of selected question codes ***/
/*****************************************************************************/
static unsigned Exa_CountNumQuestionsInList (const struct Exa_Exams *Exams)
{
const char *Ptr;
unsigned NumQuestions = 0;
char LongStr[Cns_MAX_DECIMAL_DIGITS_LONG + 1];
long QstCod;
/***** Go over list of questions counting the number of questions *****/
Ptr = Exams->ListQuestions;
while (*Ptr)
{
Par_GetNextStrUntilSeparParamMult (&Ptr,LongStr,Cns_MAX_DECIMAL_DIGITS_LONG);
if (sscanf (LongStr,"%ld",&QstCod) != 1)
Lay_ShowErrorAndExit ("Wrong question code.");
NumQuestions++;
}
return NumQuestions;
}
/*****************************************************************************/
/***************** Request the removal of a set of questions *****************/
/*****************************************************************************/
void ExaSet_RequestRemoveSet (void)
{
}
/*****************************************************************************/
/************************* Remove a set of questions *************************/
/*****************************************************************************/
void ExaSet_RemoveSet (void)
{
}
/*****************************************************************************/
/************ Move up position of a set of questions in an exam **************/
/*****************************************************************************/
void ExaSet_MoveUpSet (void)
{
}
/*****************************************************************************/
/*********** Move down position of a set of questions in an exam *************/
/*****************************************************************************/
void ExaSet_MoveDownSet (void)
{
}
/*****************************************************************************/
/********************** Request the removal of a question ********************/
/*****************************************************************************/
void Exa_RequestRemoveQst (void)
{
extern const char *Txt_Do_you_really_want_to_remove_the_question_X;
extern const char *Txt_Remove_question;
struct Exa_Exams Exams;
struct Exa_Exam Exam;
unsigned QstInd;
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Reset exam *****/
Exa_ResetExam (&Exam);
/***** Get parameters *****/
Exa_GetParams (&Exams);
if (Exams.ExaCod <= 0)
Lay_WrongExamExit ();
Exam.ExaCod = Exams.ExaCod;
/***** Get data of exam from database *****/
Exa_GetDataOfExamByCod (&Exam);
/***** Check if exam has events *****/
if (Exa_CheckIfEditable (&Exam))
{
/***** Get question index *****/
QstInd = Exa_GetParamQstInd ();
/***** Show question and button to remove question *****/
Exams.ExaCod = Exam.ExaCod;
Exams.QstInd = QstInd;
Ale_ShowAlertAndButton (ActRemExaQst,NULL,NULL,
Exa_PutParamsOneQst,&Exams,
Btn_REMOVE_BUTTON,Txt_Remove_question,
Ale_QUESTION,Txt_Do_you_really_want_to_remove_the_question_X,
QstInd);
}
else
Lay_NoPermissionExit ();
/***** Show current exam *****/
Exa_ShowOnlyOneExam (&Exams,&Exam,
true, // List exam questions
false); // Do not put form to start new event
}
/*****************************************************************************/
/****************************** Remove a question ****************************/
/*****************************************************************************/
void Exa_RemoveQst (void)
{
extern const char *Txt_Question_removed;
struct Exa_Exams Exams;
struct Exa_Exam Exam;
unsigned QstInd;
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Reset exam *****/
Exa_ResetExam (&Exam);
/***** Get parameters *****/
Exa_GetParams (&Exams);
if (Exams.ExaCod <= 0)
Lay_WrongExamExit ();
Exam.ExaCod = Exams.ExaCod;
/***** Get data of exam from database *****/
Exa_GetDataOfExamByCod (&Exam);
/***** Check if exam has events *****/
if (Exa_CheckIfEditable (&Exam))
{
/***** Get question index *****/
QstInd = Exa_GetParamQstInd ();
/***** Remove the question from all the tables *****/
/* Remove answers from this test question */
Exa_RemAnswersOfAQuestion (Exam.ExaCod,QstInd);
/* Remove the question itself */
DB_QueryDELETE ("can not remove a question",
"DELETE FROM exa_questions"
" WHERE ExaCod=%ld AND QstInd=%u",
Exam.ExaCod,QstInd);
if (!mysql_affected_rows (&Gbl.mysql))
Lay_ShowErrorAndExit ("The question to be removed does not exist.");
/* Change index of questions greater than this */
DB_QueryUPDATE ("can not update indexes of questions in table of answers",
"UPDATE exa_answers,exa_events"
" SET exa_answers.QstInd=exa_answers.QstInd-1"
" WHERE exa_events.ExaCod=%ld"
" AND exa_events.EvtCod=exa_answers.EvtCod"
" AND exa_answers.QstInd>%u",
Exam.ExaCod,QstInd);
DB_QueryUPDATE ("can not update indexes of questions",
"UPDATE exa_questions SET QstInd=QstInd-1"
" WHERE ExaCod=%ld AND QstInd>%u",
Exam.ExaCod,QstInd);
/***** Write message *****/
Ale_ShowAlert (Ale_SUCCESS,Txt_Question_removed);
}
else
Lay_NoPermissionExit ();
/***** Show current exam *****/
Exa_ShowOnlyOneExam (&Exams,&Exam,
true, // List exam questions
false); // Do not put form to start new event
}
/*****************************************************************************/
/***************** Move up position of a question in an exam ******************/
/*****************************************************************************/
void Exa_MoveUpQst (void)
{
extern const char *Txt_The_question_has_been_moved_up;
extern const char *Txt_Movement_not_allowed;
struct Exa_Exams Exams;
struct Exa_Exam Exam;
unsigned QstIndTop;
unsigned QstIndBottom;
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Reset exam *****/
Exa_ResetExam (&Exam);
/***** Get parameters *****/
Exa_GetParams (&Exams);
if (Exams.ExaCod <= 0)
Lay_WrongExamExit ();
Exam.ExaCod = Exams.ExaCod;
/***** Get data of exam from database *****/
Exa_GetDataOfExamByCod (&Exam);
/***** Check if exam has events *****/
if (Exa_CheckIfEditable (&Exam))
{
/***** Get question index *****/
QstIndBottom = Exa_GetParamQstInd ();
/***** Move up question *****/
if (QstIndBottom > 1)
{
/* Indexes of questions to be exchanged */
QstIndTop = Exa_GetPrevQuestionIndexInExam (Exam.ExaCod,QstIndBottom);
if (!QstIndTop)
Lay_ShowErrorAndExit ("Wrong index of question.");
/* Exchange questions */
Exa_ExchangeQuestions (Exam.ExaCod,QstIndTop,QstIndBottom);
/* Success alert */
Ale_ShowAlert (Ale_SUCCESS,Txt_The_question_has_been_moved_up);
}
else
Ale_ShowAlert (Ale_WARNING,Txt_Movement_not_allowed);
}
else
Lay_NoPermissionExit ();
/***** Show current exam *****/
Exa_ShowOnlyOneExam (&Exams,&Exam,
true, // List exam questions
false); // Do not put form to start new event
}
/*****************************************************************************/
/**************** Move down position of a question in an exam *****************/
/*****************************************************************************/
void Exa_MoveDownQst (void)
{
extern const char *Txt_The_question_has_been_moved_down;
extern const char *Txt_Movement_not_allowed;
extern const char *Txt_This_exam_has_no_questions;
struct Exa_Exams Exams;
struct Exa_Exam Exam;
unsigned QstIndTop;
unsigned QstIndBottom;
unsigned MaxQstInd; // 0 if no questions
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Reset exam *****/
Exa_ResetExam (&Exam);
/***** Get parameters *****/
Exa_GetParams (&Exams);
if (Exams.ExaCod <= 0)
Lay_WrongExamExit ();
Exam.ExaCod = Exams.ExaCod;
/***** Get data of exam from database *****/
Exa_GetDataOfExamByCod (&Exam);
/***** Check if exam has events *****/
if (Exa_CheckIfEditable (&Exam))
{
/***** Get question index *****/
QstIndTop = Exa_GetParamQstInd ();
/***** Get maximum question index *****/
MaxQstInd = Exa_GetMaxQuestionIndexInExam (Exam.ExaCod);
/***** Move down question *****/
if (MaxQstInd)
{
if (QstIndTop < MaxQstInd)
{
/* Indexes of questions to be exchanged */
QstIndBottom = Exa_GetNextQuestionIndexInExam (Exam.ExaCod,QstIndTop);
if (!QstIndBottom)
Lay_ShowErrorAndExit ("Wrong index of question.");
/* Exchange questions */
Exa_ExchangeQuestions (Exam.ExaCod,QstIndTop,QstIndBottom);
/* Success alert */
Ale_ShowAlert (Ale_SUCCESS,Txt_The_question_has_been_moved_down);
}
else
Ale_ShowAlert (Ale_WARNING,Txt_Movement_not_allowed);
}
else
Ale_ShowAlert (Ale_WARNING,Txt_This_exam_has_no_questions);
}
else
Lay_NoPermissionExit ();
/***** Show current exam *****/
Exa_ShowOnlyOneExam (&Exams,&Exam,
true, // List exam questions
false); // Do not put form to start new event
}
/*****************************************************************************/
/********* Exchange the order of two consecutive questions in an exam *********/
/*****************************************************************************/
static void Exa_ExchangeQuestions (long ExaCod,
unsigned QstIndTop,unsigned QstIndBottom)
{
long QstCodTop;
long QstCodBottom;
/***** Lock table to make the move atomic *****/
DB_Query ("can not lock tables to move exam question",
"LOCK TABLES exa_questions WRITE");
Gbl.DB.LockedTables = true;
/***** Get question code of the questions to be moved *****/
QstCodTop = Exa_GetQstCodFromQstInd (ExaCod,QstIndTop);
QstCodBottom = Exa_GetQstCodFromQstInd (ExaCod,QstIndBottom);
/***** Exchange indexes of questions *****/
/*
Example:
QstIndTop = 1; QstCodTop = 218
QstIndBottom = 2; QstCodBottom = 220
+--------+--------+ +--------+--------+ +--------+--------+
| QstInd | QstCod | | QstInd | QstCod | | QstInd | QstCod |
+--------+--------+ +--------+--------+ +--------+--------+
| 1 | 218 | -----> | 2 | 218 | = | 1 | 220 |
| 2 | 220 | | 1 | 220 | | 2 | 218 |
| 3 | 232 | | 3 | 232 | | 3 | 232 |
+--------+--------+ +--------+--------+ +--------+--------+
*/
DB_QueryUPDATE ("can not exchange indexes of questions",
"UPDATE exa_questions SET QstInd=%u"
" WHERE ExaCod=%ld AND QstCod=%ld",
QstIndBottom,
ExaCod,QstCodTop);
DB_QueryUPDATE ("can not exchange indexes of questions",
"UPDATE exa_questions SET QstInd=%u"
" WHERE ExaCod=%ld AND QstCod=%ld",
QstIndTop,
ExaCod,QstCodBottom);
/***** Unlock table *****/
Gbl.DB.LockedTables = false; // Set to false before the following unlock...
// ...to not retry the unlock if error in unlocking
DB_Query ("can not unlock tables after moving exam questions",
"UNLOCK TABLES");
}
/*****************************************************************************/
/*********** Get number of events and check is edition is possible **********/
/*****************************************************************************/
// Before calling this function, number of events must be calculated
static bool Exa_CheckIfEditable (const struct Exa_Exam *Exam)
{
if (Exa_CheckIfICanEditExams ())
/***** Questions are editable only if exam has no events *****/
return (bool) (Exam->NumEvts == 0); // Exams with events should not be edited
else
return false; // Questions are not editable
}
/*****************************************************************************/
/********************* Put button to create a new event **********************/
/*****************************************************************************/
void Exa_PutButtonNewEvent (struct Exa_Exams *Exams,long ExaCod)
{
extern const char *Txt_New_event;
Exams->ExaCod = ExaCod;
Frm_StartFormAnchor (ActReqNewExaEvt,ExaEvt_NEW_EVENT_SECTION_ID);
Exa_PutParams (Exams);
Btn_PutConfirmButton (Txt_New_event);
Frm_EndForm ();
}
/*****************************************************************************/
/************* Request the creation of a new event as a teacher **************/
/*****************************************************************************/
void Exa_RequestNewEvent (void)
{
struct Exa_Exams Exams;
struct Exa_Exam Exam;
/***** Reset exams context *****/
Exa_ResetExams (&Exams);
/***** Reset exam *****/
Exa_ResetExam (&Exam);
/***** Get parameters *****/
Exa_GetParams (&Exams);
if (Exams.ExaCod <= 0)
Lay_WrongExamExit ();
Exam.ExaCod = Exams.ExaCod;
/***** Get data of exam from database *****/
Exa_GetDataOfExamByCod (&Exam);
/***** Show exam *****/
Exa_ShowOnlyOneExam (&Exams,&Exam,
false, // Do not list exam questions
true); // Put form to start new event
}
/*****************************************************************************/
/********************* Get number of courses with exams **********************/
/*****************************************************************************/
// Returns the number of courses with exams in this location
unsigned Exa_GetNumCoursesWithExams (Hie_Level_t Scope)
{
MYSQL_RES *mysql_res;
MYSQL_ROW row;
unsigned NumCourses;
/***** Get number of courses with exams from database *****/
switch (Scope)
{
case Hie_SYS:
DB_QuerySELECT (&mysql_res,"can not get number of courses with exams",
"SELECT COUNT(DISTINCT CrsCod)"
" FROM exa_exams");
break;
case Hie_CTY:
DB_QuerySELECT (&mysql_res,"can not get number of courses with exams",
"SELECT COUNT(DISTINCT exa_exams.CrsCod)"
" FROM institutions,centres,degrees,courses,exa_exams"
" WHERE institutions.CtyCod=%ld"
" AND institutions.InsCod=centres.InsCod"
" AND centres.CtrCod=degrees.CtrCod"
" AND degrees.DegCod=courses.DegCod"
" AND courses.CrsCod=exa_exams.CrsCod",
Gbl.Hierarchy.Ins.InsCod);
break;
case Hie_INS:
DB_QuerySELECT (&mysql_res,"can not get number of courses with exams",
"SELECT COUNT(DISTINCT exa_exams.CrsCod)"
" FROM centres,degrees,courses,exa_exams"
" WHERE centres.InsCod=%ld"
" AND centres.CtrCod=degrees.CtrCod"
" AND degrees.DegCod=courses.DegCod"
" AND courses.CrsCod=exa_exams.CrsCod",
Gbl.Hierarchy.Ins.InsCod);
break;
case Hie_CTR:
DB_QuerySELECT (&mysql_res,"can not get number of courses with exams",
"SELECT COUNT(DISTINCT exa_exams.CrsCod)"
" FROM degrees,courses,exa_exams"
" WHERE degrees.CtrCod=%ld"
" AND degrees.DegCod=courses.DegCod"
" AND courses.CrsCod=exa_exams.CrsCod",
Gbl.Hierarchy.Ctr.CtrCod);
break;
case Hie_DEG:
DB_QuerySELECT (&mysql_res,"can not get number of courses with exams",
"SELECT COUNT(DISTINCT exa_exams.CrsCod)"
" FROM courses,exa_exams"
" WHERE courses.DegCod=%ld"
" AND courses.CrsCod=exa_exams.CrsCod",
Gbl.Hierarchy.Deg.DegCod);
break;
case Hie_CRS:
DB_QuerySELECT (&mysql_res,"can not get number of courses with exams",
"SELECT COUNT(DISTINCT CrsCod)"
" FROM exa_exams"
" WHERE CrsCod=%ld",
Gbl.Hierarchy.Crs.CrsCod);
break;
default:
Lay_WrongScopeExit ();
break;
}
/***** Get number of exams *****/
row = mysql_fetch_row (mysql_res);
if (sscanf (row[0],"%u",&NumCourses) != 1)
Lay_ShowErrorAndExit ("Error when getting number of courses with exams.");
/***** Free structure that stores the query result *****/
DB_FreeMySQLResult (&mysql_res);
return NumCourses;
}
/*****************************************************************************/
/**************************** Get number of exams ****************************/
/*****************************************************************************/
// Returns the number of exams in this location
unsigned Exa_GetNumExams (Hie_Level_t Scope)
{
MYSQL_RES *mysql_res;
MYSQL_ROW row;
unsigned NumExams;
/***** Get number of exams from database *****/
switch (Scope)
{
case Hie_SYS:
DB_QuerySELECT (&mysql_res,"can not get number of exams",
"SELECT COUNT(*)"
" FROM exa_exams");
break;
case Hie_CTY:
DB_QuerySELECT (&mysql_res,"can not get number of exams",
"SELECT COUNT(*)"
" FROM institutions,centres,degrees,courses,exa_exams"
" WHERE institutions.CtyCod=%ld"
" AND institutions.InsCod=centres.InsCod"
" AND centres.CtrCod=degrees.CtrCod"
" AND degrees.DegCod=courses.DegCod"
" AND courses.CrsCod=exa_exams.CrsCod",
Gbl.Hierarchy.Cty.CtyCod);
break;
case Hie_INS:
DB_QuerySELECT (&mysql_res,"can not get number of exams",
"SELECT COUNT(*)"
" FROM centres,degrees,courses,exa_exams"
" WHERE centres.InsCod=%ld"
" AND centres.CtrCod=degrees.CtrCod"
" AND degrees.DegCod=courses.DegCod"
" AND courses.CrsCod=exa_exams.CrsCod",
Gbl.Hierarchy.Ins.InsCod);
break;
case Hie_CTR:
DB_QuerySELECT (&mysql_res,"can not get number of exams",
"SELECT COUNT(*)"
" FROM degrees,courses,exa_exams"
" WHERE degrees.CtrCod=%ld"
" AND degrees.DegCod=courses.DegCod"
" AND courses.CrsCod=exa_exams.CrsCod",
Gbl.Hierarchy.Ctr.CtrCod);
break;
case Hie_DEG:
DB_QuerySELECT (&mysql_res,"can not get number of exams",
"SELECT COUNT(*)"
" FROM courses,exa_exams"
" WHERE courses.DegCod=%ld"
" AND courses.CrsCod=exa_exams.CrsCod",
Gbl.Hierarchy.Deg.DegCod);
break;
case Hie_CRS:
DB_QuerySELECT (&mysql_res,"can not get number of exams",
"SELECT COUNT(*)"
" FROM exa_exams"
" WHERE CrsCod=%ld",
Gbl.Hierarchy.Crs.CrsCod);
break;
default:
Lay_WrongScopeExit ();
break;
}
/***** Get number of exams *****/
row = mysql_fetch_row (mysql_res);
if (sscanf (row[0],"%u",&NumExams) != 1)
Lay_ShowErrorAndExit ("Error when getting number of exams.");
/***** Free structure that stores the query result *****/
DB_FreeMySQLResult (&mysql_res);
return NumExams;
}
/*****************************************************************************/
/************* Get average number of questions per course exam ***************/
/*****************************************************************************/
double Exa_GetNumQstsPerCrsExam (Hie_Level_t Scope)
{
MYSQL_RES *mysql_res;
MYSQL_ROW row;
double NumQstsPerExam;
/***** Get number of questions per exam from database *****/
switch (Scope)
{
case Hie_SYS:
DB_QuerySELECT (&mysql_res,"can not get number of questions per exam",
"SELECT AVG(NumQsts) FROM"
" (SELECT COUNT(exa_questions.QstCod) AS NumQsts"
" FROM exa_exams,exa_questions"
" WHERE exa_exams.ExaCod=exa_questions.ExaCod"
" GROUP BY exa_questions.ExaCod) AS NumQstsTable");
break;
case Hie_CTY:
DB_QuerySELECT (&mysql_res,"can not get number of questions per exam",
"SELECT AVG(NumQsts) FROM"
" (SELECT COUNT(exa_questions.QstCod) AS NumQsts"
" FROM institutions,centres,degrees,courses,exa_exams,exa_questions"
" WHERE institutions.CtyCod=%ld"
" AND institutions.InsCod=centres.InsCod"
" AND centres.CtrCod=degrees.CtrCod"
" AND degrees.DegCod=courses.DegCod"
" AND courses.CrsCod=exa_exams.CrsCod"
" AND exa_exams.ExaCod=exa_questions.ExaCod"
" GROUP BY exa_questions.ExaCod) AS NumQstsTable",
Gbl.Hierarchy.Cty.CtyCod);
break;
case Hie_INS:
DB_QuerySELECT (&mysql_res,"can not get number of questions per exam",
"SELECT AVG(NumQsts) FROM"
" (SELECT COUNT(exa_questions.QstCod) AS NumQsts"
" FROM centres,degrees,courses,exa_exams,exa_questions"
" WHERE centres.InsCod=%ld"
" AND centres.CtrCod=degrees.CtrCod"
" AND degrees.DegCod=courses.DegCod"
" AND courses.CrsCod=exa_exams.CrsCod"
" AND exa_exams.ExaCod=exa_questions.ExaCod"
" GROUP BY exa_questions.ExaCod) AS NumQstsTable",
Gbl.Hierarchy.Ins.InsCod);
break;
case Hie_CTR:
DB_QuerySELECT (&mysql_res,"can not get number of questions per exam",
"SELECT AVG(NumQsts) FROM"
" (SELECT COUNT(exa_questions.QstCod) AS NumQsts"
" FROM degrees,courses,exa_exams,exa_questions"
" WHERE degrees.CtrCod=%ld"
" AND degrees.DegCod=courses.DegCod"
" AND courses.CrsCod=exa_exams.CrsCod"
" AND exa_exams.ExaCod=exa_questions.ExaCod"
" GROUP BY exa_questions.ExaCod) AS NumQstsTable",
Gbl.Hierarchy.Ctr.CtrCod);
break;
case Hie_DEG:
DB_QuerySELECT (&mysql_res,"can not get number of questions per exam",
"SELECT AVG(NumQsts) FROM"
" (SELECT COUNT(exa_questions.QstCod) AS NumQsts"
" FROM courses,exa_exams,exa_questions"
" WHERE courses.DegCod=%ld"
" AND courses.CrsCod=exa_exams.CrsCod"
" AND exa_exams.ExaCod=exa_questions.ExaCod"
" GROUP BY exa_questions.ExaCod) AS NumQstsTable",
Gbl.Hierarchy.Deg.DegCod);
break;
case Hie_CRS:
DB_QuerySELECT (&mysql_res,"can not get number of questions per exam",
"SELECT AVG(NumQsts) FROM"
" (SELECT COUNT(exa_questions.QstCod) AS NumQsts"
" FROM exa_exams,exa_questions"
" WHERE exa_exams.Cod=%ld"
" AND exa_exams.ExaCod=exa_questions.ExaCod"
" GROUP BY exa_questions.ExaCod) AS NumQstsTable",
Gbl.Hierarchy.Crs.CrsCod);
break;
default:
Lay_WrongScopeExit ();
break;
}
/***** Get average number of questions per exam *****/
row = mysql_fetch_row (mysql_res);
NumQstsPerExam = Str_GetDoubleFromStr (row[0]);
/***** Free structure that stores the query result *****/
DB_FreeMySQLResult (&mysql_res);
return NumQstsPerExam;
}
/*****************************************************************************/
/************************* Show test tags in an exam **************************/
/*****************************************************************************/
void Exa_ShowTstTagsPresentInAnExam (long ExaCod)
{
MYSQL_RES *mysql_res;
unsigned long NumTags;
/***** Get all tags of questions in this exam *****/
NumTags = (unsigned)
DB_QuerySELECT (&mysql_res,"can not get tags"
" present in an event result",
"SELECT tst_tags.TagTxt" // row[0]
" FROM"
" (SELECT DISTINCT(tst_question_tags.TagCod)"
" FROM tst_question_tags,exa_questions"
" WHERE exa_questions.ExaCod=%ld"
" AND exa_questions.QstCod=tst_question_tags.QstCod)"
" AS TagsCods,tst_tags"
" WHERE TagsCods.TagCod=tst_tags.TagCod"
" ORDER BY tst_tags.TagTxt",
ExaCod);
Tst_ShowTagList (NumTags,mysql_res);
/***** Free structure that stores the query result *****/
DB_FreeMySQLResult (&mysql_res);
}
/*****************************************************************************/
/*************** Get maximum score of an exam from database *******************/
/*****************************************************************************/
void Exa_GetScoreRange (long ExaCod,double *MinScore,double *MaxScore)
{
MYSQL_RES *mysql_res;
MYSQL_ROW row;
unsigned NumRows;
unsigned NumRow;
unsigned NumAnswers;
/***** Get maximum score of an exam from database *****/
NumRows = (unsigned)
DB_QuerySELECT (&mysql_res,"can not get data of a question",
"SELECT COUNT(tst_answers.AnsInd) AS N"
" FROM tst_answers,exa_questions"
" WHERE exa_questions.ExaCod=%ld"
" AND exa_questions.QstCod=tst_answers.QstCod"
" GROUP BY tst_answers.QstCod",
ExaCod);
for (NumRow = 0, *MinScore = *MaxScore = 0.0;
NumRow < NumRows;
NumRow++)
{
row = mysql_fetch_row (mysql_res);
/* Get min answers (row[0]) */
if (sscanf (row[0],"%u",&NumAnswers) != 1)
NumAnswers = 0;
/* Accumulate minimum and maximum score */
if (NumAnswers < 2)
Lay_ShowErrorAndExit ("Wrong number of answers.");
*MinScore += -1.0 / (double) (NumAnswers - 1);
*MaxScore += 1.0;
}
/***** Free structure that stores the query result *****/
DB_FreeMySQLResult (&mysql_res);
}
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