mirror of https://github.com/acanas/swad-core.git
351 lines
10 KiB
C
351 lines
10 KiB
C
// swad_exam_log.c: exam access log
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/*
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SWAD (Shared Workspace At a Distance),
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is a web platform developed at the University of Granada (Spain),
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and used to support university teaching.
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This file is part of SWAD core.
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Copyright (C) 1999-2020 Antonio Cañas Vargas
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*****************************************************************************/
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/********************************* Headers ***********************************/
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/*****************************************************************************/
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#define _GNU_SOURCE // For asprintf
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#include <stdio.h> // For asprintf
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#include <string.h> // For string functions
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#include "swad_action.h"
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#include "swad_database.h"
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#include "swad_exam_log.h"
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#include "swad_global.h"
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/*****************************************************************************/
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/************** External global variables from others modules ****************/
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/*****************************************************************************/
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extern struct Globals Gbl;
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/*****************************************************************************/
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/***************************** Private constants *****************************/
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/*****************************************************************************/
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/*****************************************************************************/
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/******************************* Private types *******************************/
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/*****************************************************************************/
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/*****************************************************************************/
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/***************************** Private variables *****************************/
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/*****************************************************************************/
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static struct
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{
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long PrnCod; // Exam print code
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int QstInd; // Exam print question index
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ExaLog_Action_t Action; // Action performed by user
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bool ICanAnswer; // Exam print is open and accesible to answer by the user
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} ExaLog_Log =
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{
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.PrnCod = -1L, // -1 means no print code set
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.QstInd = -1, // -1 means no question index set
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.Action = ExaLog_UNKNOWN_ACTION,
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.ICanAnswer = false,
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};
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/*****************************************************************************/
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/***************************** Private prototypes ****************************/
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/*****************************************************************************/
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/*****************************************************************************/
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/************* Set and get current exam print code (used in log) *************/
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/*****************************************************************************/
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void ExaLog_SetAction (ExaLog_Action_t Action)
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{
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ExaLog_Log.Action = Action;
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}
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ExaLog_Action_t ExaLog_GetAction (void)
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{
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return ExaLog_Log.Action;
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}
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/*****************************************************************************/
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/******************** Set and get current exam print code ********************/
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/*****************************************************************************/
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void ExaLog_SetPrnCod (long PrnCod)
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{
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ExaLog_Log.PrnCod = PrnCod;
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}
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long ExaLog_GetPrnCod (void)
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{
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return ExaLog_Log.PrnCod;
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}
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/*****************************************************************************/
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/************* Set and get current question index in exam print **************/
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/*****************************************************************************/
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void ExaLog_SetQstInd (unsigned QstInd)
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{
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ExaLog_Log.QstInd = (int) QstInd;
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}
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int ExaLog_GetQstInd (void)
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{
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return ExaLog_Log.QstInd;
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}
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/*****************************************************************************/
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/************* Set and get if exam print is open and accessible **************/
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/*****************************************************************************/
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void ExaLog_SetIfCanAnswer (bool ICanAnswer)
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{
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ExaLog_Log.ICanAnswer = ICanAnswer;
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}
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bool ExaLog_GetIfCanAnswer (void)
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{
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return ExaLog_Log.ICanAnswer;
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}
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/*****************************************************************************/
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/**************************** Log access in database *************************/
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/*****************************************************************************/
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void ExaLog_LogAccess (long LogCod)
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{
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ExaLog_Action_t Action;
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long PrnCod;
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Action = ExaLog_GetAction ();
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if (Action != ExaLog_UNKNOWN_ACTION)
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{
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PrnCod = ExaLog_GetPrnCod ();
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if (PrnCod > 0) // Only if exam print is accesible (visible, open...)
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/***** Insert access into database *****/
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/* Log access in exam log.
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Redundant data (also present in log table) are stored for speed */
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DB_QueryINSERT ("can not log exam access",
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"INSERT INTO exa_log "
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"(LogCod,PrnCod,ActCod,QstInd,CanAnswer,ClickTime,IP,SessionId)"
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" VALUES "
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"(%ld,%ld,%ld,%d,'%c',NOW(),'%s','%s')",
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LogCod,
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PrnCod,
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(unsigned) Action,
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ExaLog_GetQstInd (),
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ExaLog_GetIfCanAnswer () ? 'Y' :
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'N',
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// NOW() Redundant, for speed
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Gbl.IP, // Redundant, for speed
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Gbl.Session.Id);
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}
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}
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/*****************************************************************************/
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/****************************** Show exam log ********************************/
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/*****************************************************************************/
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void ExaLog_ShowExamLog (const struct ExaPrn_Print *Print)
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{
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extern const char *Txt_Hits;
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extern const char *Txt_Date_and_time;
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extern const char *Txt_Action;
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extern const char *Txt_Question;
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extern const char *Txt_EXAM_Open;
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extern const char *Txt_IP;
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extern const char *Txt_Session;
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extern const char *Txt_EXAM_LOG_ACTIONS[ExaLog_NUM_ACTIONS];
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MYSQL_RES *mysql_res;
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MYSQL_ROW row;
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unsigned NumClicks;
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unsigned NumClick;
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unsigned ActCod;
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int QstInd;
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bool UsrCouldAnswer;
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time_t ClickTimeUTC;
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char IP[Cns_MAX_BYTES_IP + 1];
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char SessionId[Cns_BYTES_SESSION_ID + 1];
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char *Id;
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size_t Length;
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char Anonymized[14 + 1]; // XXX…XXX
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// 12345678901234
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/***** Check if I can view this print result *****/
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switch (Gbl.Usrs.Me.Role.Logged)
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{
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case Rol_NET:
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case Rol_TCH:
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case Rol_DEG_ADM:
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case Rol_CTR_ADM:
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case Rol_INS_ADM:
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case Rol_SYS_ADM:
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break;
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default: // Other users can not see log
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return;
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}
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/***** Get print log from database *****/
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NumClicks = (unsigned)
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DB_QuerySELECT (&mysql_res,"can not get exam print log",
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"SELECT ActCod," // row[0]
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"QstInd," // row[1]
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"CanAnswer," // row[2]
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"UNIX_TIMESTAMP(ClickTime)," // row[3]
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"IP," // row[4]
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"SessionId" // row[5]
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" FROM exa_log"
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" WHERE PrnCod=%ld"
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" ORDER BY LogCod",
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Print->PrnCod);
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if (NumClicks)
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{
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/***** Begin box *****/
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Box_BoxTableBegin (NULL,Txt_Hits,
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NULL,NULL,
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NULL,Box_CLOSABLE,2);
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/***** Begin table *****/
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HTM_TABLE_BeginWideMarginPadding (2);
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/***** Write heading *****/
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HTM_TR_Begin (NULL);
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HTM_TH (1,1,"LB",Txt_Date_and_time);
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HTM_TH (1,1,"LB",Txt_Action);
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HTM_TH (1,1,"RB",Txt_Question);
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HTM_TH (1,1,"CB",Txt_EXAM_Open);
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HTM_TH (1,1,"LB",Txt_IP);
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HTM_TH (1,1,"LB",Txt_Session);
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HTM_TR_End ();
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/***** Write clicks *****/
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for (NumClick = 0;
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NumClick < NumClicks;
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NumClick++)
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{
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/***** Get row *****/
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row = mysql_fetch_row (mysql_res);
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/* Get code of action (row[0]) */
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ActCod = Str_ConvertStrToUnsigned (row[0]);
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if (ActCod >= ExaLog_NUM_ACTIONS)
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ActCod = ExaLog_UNKNOWN_ACTION;
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/* Get question index (row[1]) */
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QstInd = (int) Str_ConvertStrCodToLongCod (row[1]);
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/* Get if the user could answer (row[2]) */
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UsrCouldAnswer = (row[2][0] == 'Y');
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/* Get click time (row[3] holds the UTC time) */
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ClickTimeUTC = Dat_GetUNIXTimeFromStr (row[3]);
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/* Get IP (row[4]) */
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Str_Copy (IP,row[4],
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Cns_MAX_BYTES_IP);
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/* Get session id (row[5]) */
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Str_Copy (SessionId,row[5],
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Cns_BYTES_SESSION_ID);
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/***** Write row *****/
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HTM_TR_Begin (NULL);
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/* Write click time */
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if (asprintf (&Id,"click_date_%u",NumClick) < 0)
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Lay_NotEnoughMemoryExit ();
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HTM_TD_Begin ("id=\"%s\" class=\"LM DAT\"",Id);
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Dat_WriteLocalDateHMSFromUTC (Id,ClickTimeUTC,
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Gbl.Prefs.DateFormat,Dat_SEPARATOR_COMMA,
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true,true,true,0x7);
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free (Id);
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HTM_TD_End ();
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/* Write action */
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HTM_TD_Begin ("class=\"LM DAT\"");
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HTM_Txt (Txt_EXAM_LOG_ACTIONS[ActCod]);
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HTM_TD_End ();
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/* Write number of question */
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HTM_TD_Begin ("class=\"RM DAT\"");
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if (QstInd >= 0)
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HTM_Unsigned ((unsigned) QstInd + 1);
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HTM_TD_End ();
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/* Write if exam print was open and accesible to answer */
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HTM_TD_Begin ("class=\"CM %s\"",UsrCouldAnswer ? "DAT_GREEN" :
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"DAT_RED");
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HTM_Txt (UsrCouldAnswer ? "✓" :
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"✗");
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HTM_TD_End ();
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/* Write IP */
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HTM_TD_Begin ("class=\"CM DAT\"");
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Length = strlen (IP);
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if (Length > 6)
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{
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sprintf (Anonymized,"%c%c%c…%c%c%c",
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IP[0],
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IP[1],
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IP[2],
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IP[Length - 3],
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IP[Length - 2],
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IP[Length - 1]);
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HTM_Txt (Anonymized);
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}
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else
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HTM_Txt ("…");
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HTM_TD_End ();
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/* Write session id */
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HTM_TD_Begin ("class=\"CM DAT\"");
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Length = strlen (SessionId);
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Length = strlen (IP);
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if (Length > 6)
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{
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sprintf (Anonymized,"%c%c%c…%c%c%c",
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SessionId[0],
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SessionId[1],
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SessionId[2],
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SessionId[Length - 3],
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SessionId[Length - 2],
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SessionId[Length - 1]);
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HTM_Txt (Anonymized);
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}
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else
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HTM_Txt ("…");
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HTM_TD_End ();
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HTM_TR_End ();
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}
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/***** End table and box *****/
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Box_BoxTableEnd ();
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}
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/***** Free structure that stores the query result *****/
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DB_FreeMySQLResult (&mysql_res);
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}
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