mirror of https://github.com/acanas/swad-core.git
752 lines
26 KiB
C
752 lines
26 KiB
C
// swad_program_resource.c: course program (resources)
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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) 1999-2021 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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#include "swad_error.h"
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#include "swad_form.h"
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#include "swad_global.h"
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#include "swad_program.h"
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#include "swad_program_database.h"
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#include "swad_program_resource.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 types *******************************/
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/*****************************************************************************/
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#define PrgRsc_NUM_MOVEMENTS_UP_DOWN 2
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typedef enum
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{
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PrgRsc_MOVE_UP,
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PrgRsc_MOVE_DOWN,
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} PrgRsc_MoveUpDown_t;
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/*****************************************************************************/
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/***************************** Private variables *****************************/
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/*****************************************************************************/
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static long PrgSrc_RscCodToBeRemoved = -1L;
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static const char *PrgRsc_RESOURCE_SECTION_ID = "rsc_section";
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/*****************************************************************************/
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/***************************** Private prototypes ****************************/
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/*****************************************************************************/
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static void PrgRsc_PutIconsViewResources (void *ItmCod);
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static void PrgRsc_PutIconsEditResources (void *ItmCod);
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static void PrgSrc_PutIconToViewResources (long ItmCod);
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static void PrgSrc_PutIconToEditResources (long ItmCod);
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static void PrgRsc_GetDataOfResourceByCod (struct PrgRsc_Resource *Resource);
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static void PrgRsc_GetDataOfResource (struct PrgRsc_Resource *Resource,
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MYSQL_RES **mysql_res);
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static void PrgRsc_ResetResource (struct PrgRsc_Resource *Resource);
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static void PrgRsc_WriteRowViewResource (unsigned NumRsc,
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struct PrgRsc_Resource *Resource);
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static void PrgRsc_WriteRowEditResource (unsigned NumRsc,unsigned NumResources,
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struct PrgRsc_Resource *Resource);
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static void PrgRsc_PutFormsToRemEditOneResource (unsigned NumRsc,
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unsigned NumResources,
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struct PrgRsc_Resource *Resource);
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static void PrgRsc_PutParams (void *RscCod);
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static void PrgRsc_PutParamRscCod (long RscCod);
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static long PrgRsc_GetParamRscCod (void);
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static void PrgRsc_HideOrUnhideResource (bool Hide);
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static void PrgRsc_MoveUpDownResource (PrgRsc_MoveUpDown_t UpDown);
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static bool PrgRsc_ExchangeResources (const struct PrgRsc_Rsc *Rsc1,
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const struct PrgRsc_Rsc *Rsc2);
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/*****************************************************************************/
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/****************************** View resources *******************************/
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/*****************************************************************************/
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void PrgRsc_ViewResourcesAfterEdit (void)
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{
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long ItmCod;
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unsigned FormLevel;
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/***** Get list of program items *****/
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Prg_GetListItems ();
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/***** Get the code of the program item *****/
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if ((ItmCod = Prg_GetParamItmCod ()) > 0)
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FormLevel = Prg_GetLevelFromNumItem (Prg_GetNumItemFromItmCod (ItmCod));
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else
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FormLevel = 0;
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/***** Show current program items, if any *****/
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Prg_ShowAllItems (Prg_END_EDIT_RES,NULL,-1L,ItmCod,FormLevel);
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/***** Free list of program items *****/
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Prg_FreeListItems ();
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}
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/*****************************************************************************/
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/****************************** Edit resources *******************************/
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/*****************************************************************************/
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void PrgRsc_EditResources (void)
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{
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long ItmCod;
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unsigned FormLevel;
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/***** Get list of program items *****/
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Prg_GetListItems ();
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/***** Get the code of the program item *****/
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if ((ItmCod = Prg_GetParamItmCod ()) > 0)
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FormLevel = Prg_GetLevelFromNumItem (Prg_GetNumItemFromItmCod (ItmCod));
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else
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FormLevel = 0;
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/***** Show current program items, if any *****/
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Prg_ShowAllItems (Prg_EDIT_RESOURCES,NULL,-1L,ItmCod,FormLevel);
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/***** Free list of program items *****/
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Prg_FreeListItems ();
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}
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/*****************************************************************************/
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/****************************** List resources *******************************/
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/*****************************************************************************/
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void PrgRsc_ListItemResources (Prg_ListingType_t ListingType,long ItmCod)
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{
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extern const char *Hlp_COURSE_Program;
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extern const char *Txt_Remove_resource;
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extern const char *Txt_Resources;
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MYSQL_RES *mysql_res;
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unsigned NumRsc;
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unsigned NumResources;
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struct PrgRsc_Resource Resource;
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static bool GetHiddenResources[Prg_NUM_LISTING_TYPES] =
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{
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[Prg_PRINT ] = false,
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[Prg_VIEW ] = false,
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[Prg_EDIT_LIST ] = false,
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[Prg_NEW_ITEM ] = false,
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[Prg_EDIT_ITEM ] = false,
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[Prg_END_EDIT_ITEM ] = false,
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[Prg_EDIT_RESOURCES] = true,
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[Prg_END_EDIT_RES ] = false,
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};
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static bool ShowListWhenEmpty[Prg_NUM_LISTING_TYPES] =
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{
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[Prg_PRINT ] = false,
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[Prg_VIEW ] = false,
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[Prg_EDIT_LIST ] = true,
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[Prg_NEW_ITEM ] = true,
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[Prg_EDIT_ITEM ] = true,
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[Prg_END_EDIT_ITEM ] = true,
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[Prg_EDIT_RESOURCES] = true,
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[Prg_END_EDIT_RES ] = true,
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};
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static bool FeaturedList[Prg_NUM_LISTING_TYPES] =
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{
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[Prg_PRINT ] = false,
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[Prg_VIEW ] = false,
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[Prg_EDIT_LIST ] = false,
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[Prg_NEW_ITEM ] = false,
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[Prg_EDIT_ITEM ] = false,
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[Prg_END_EDIT_ITEM ] = false,
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[Prg_EDIT_RESOURCES] = true,
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[Prg_END_EDIT_RES ] = true,
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};
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static void (*FunctionToDrawContextualIcons[Prg_NUM_LISTING_TYPES]) (void *Args) =
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{
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[Prg_PRINT ] = NULL,
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[Prg_VIEW ] = NULL,
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[Prg_EDIT_LIST ] = PrgRsc_PutIconsEditResources,
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[Prg_NEW_ITEM ] = PrgRsc_PutIconsEditResources,
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[Prg_EDIT_ITEM ] = PrgRsc_PutIconsEditResources,
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[Prg_END_EDIT_ITEM ] = PrgRsc_PutIconsEditResources,
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[Prg_EDIT_RESOURCES] = PrgRsc_PutIconsViewResources,
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[Prg_END_EDIT_RES ] = PrgRsc_PutIconsEditResources,
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};
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/***** Trivial check *****/
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if (ItmCod <= 0)
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return;
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/***** Get list of item resources from database *****/
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NumResources = Prg_DB_GetListResources (&mysql_res,ItmCod,
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GetHiddenResources[ListingType]);
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if (NumResources || ShowListWhenEmpty[ListingType])
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{
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/***** Begin section *****/
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if (FeaturedList[ListingType])
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HTM_SECTION_Begin (PrgRsc_RESOURCE_SECTION_ID);
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/***** Show possible alerts *****/
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if (FeaturedList[ListingType])
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switch (Gbl.Action.Act)
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{
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case ActReqRemPrgRsc:
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/* Alert with button to remove resource */
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Ale_ShowLastAlertAndButton (ActRemPrgRsc,PrgRsc_RESOURCE_SECTION_ID,NULL,
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PrgRsc_PutParams,&PrgSrc_RscCodToBeRemoved,
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Btn_REMOVE_BUTTON,Txt_Remove_resource);
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break;
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default:
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Ale_ShowAlerts (PrgRsc_RESOURCE_SECTION_ID);
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break;
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}
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/***** Begin box *****/
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Box_BoxBegin ("100%",Txt_Resources,
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FunctionToDrawContextualIcons[ListingType],&ItmCod,
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Hlp_COURSE_Program,Box_NOT_CLOSABLE);
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/***** Table *****/
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HTM_TABLE_BeginWideMarginPadding (2);
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HTM_TBODY_Begin (NULL);
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/***** Write all item resources *****/
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for (NumRsc = 0;
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NumRsc < NumResources;
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NumRsc++)
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{
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/* Get data of this item resource */
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PrgRsc_GetDataOfResource (&Resource,&mysql_res);
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/* Show item */
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switch (ListingType)
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{
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case Prg_EDIT_RESOURCES:
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PrgRsc_WriteRowEditResource (NumRsc,NumResources,&Resource);
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break;
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default:
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PrgRsc_WriteRowViewResource (NumRsc,&Resource);
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break;
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}
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The_ChangeRowColor ();
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}
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/***** End table *****/
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HTM_TBODY_End ();
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HTM_TABLE_End ();
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/***** End box *****/
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Box_BoxEnd ();
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/***** End section *****/
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if (FeaturedList[ListingType])
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HTM_SECTION_End ();
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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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/*****************************************************************************/
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/************** Put contextual icons in list of item resources ***************/
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/*****************************************************************************/
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static void PrgRsc_PutIconsViewResources (void *ItmCod)
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{
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/***** Put icon to create a new item resource *****/
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if (ItmCod)
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if (*((long *) ItmCod) > 0)
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if (Prg_CheckIfICanEditProgram ())
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PrgSrc_PutIconToViewResources (*((long *) ItmCod));
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}
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static void PrgRsc_PutIconsEditResources (void *ItmCod)
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{
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/***** Put icon to create a new item resource *****/
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if (ItmCod)
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if (*((long *) ItmCod) > 0)
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if (Prg_CheckIfICanEditProgram ())
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PrgSrc_PutIconToEditResources (*((long *) ItmCod));
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}
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/*****************************************************************************/
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/********************* Put icon to edit item resources ***********************/
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/*****************************************************************************/
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static void PrgSrc_PutIconToViewResources (long ItmCod)
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{
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Ico_PutContextualIconToView (ActFrmSeePrgRsc,PrgRsc_RESOURCE_SECTION_ID,
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Prg_PutParams,&ItmCod);
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}
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static void PrgSrc_PutIconToEditResources (long ItmCod)
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{
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Ico_PutContextualIconToEdit (ActFrmEdiPrgRsc,PrgRsc_RESOURCE_SECTION_ID,
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Prg_PutParams,&ItmCod);
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}
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/*****************************************************************************/
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/****************** Get item resource data using its code ********************/
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/*****************************************************************************/
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static void PrgRsc_GetDataOfResourceByCod (struct PrgRsc_Resource *Resource)
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{
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MYSQL_RES *mysql_res;
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if (Resource->Rsc.Cod > 0)
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{
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/***** Get data of item resource *****/
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if (Prg_DB_GetDataOfResourceByCod (&mysql_res,Resource->Rsc.Cod))
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PrgRsc_GetDataOfResource (Resource,&mysql_res);
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else
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PrgRsc_ResetResource (Resource);
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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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else
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/***** Clear all item resource data *****/
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PrgRsc_ResetResource (Resource);
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}
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/*****************************************************************************/
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/************************* Get item resource data ****************************/
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/*****************************************************************************/
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static void PrgRsc_GetDataOfResource (struct PrgRsc_Resource *Resource,
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MYSQL_RES **mysql_res)
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{
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MYSQL_ROW row;
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/***** Get data of item resource from database *****/
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/* Get row */
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row = mysql_fetch_row (*mysql_res);
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/*
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ItmCod row[0]
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RscCod row[1]
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RscInd row[2]
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Hidden row[3]
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Title row[4]
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*/
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/* Get code of the program item (row[0]) */
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Resource->ItmCod = Str_ConvertStrCodToLongCod (row[0]);
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/* Get code and index of the item resource (row[1], row[2]) */
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Resource->Rsc.Cod = Str_ConvertStrCodToLongCod (row[1]);
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Resource->Rsc.Ind = Str_ConvertStrToUnsigned (row[2]);
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/* Get whether the program item is hidden (row(3)) */
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Resource->Hidden = (row[3][0] == 'Y');
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/* Get the title of the item resource (row[4]) */
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Str_Copy (Resource->Title,row[4],sizeof (Resource->Title) - 1);
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}
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/*****************************************************************************/
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/************************ Clear all item resource data ***********************/
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/*****************************************************************************/
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static void PrgRsc_ResetResource (struct PrgRsc_Resource *Resource)
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{
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Resource->ItmCod = -1L;
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Resource->Rsc.Cod = -1L;
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Resource->Rsc.Ind = 0;
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Resource->Hidden = false;
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Resource->Title[0] = '\0';
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}
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/*****************************************************************************/
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/************************** Show one item resource ***************************/
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/*****************************************************************************/
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static void PrgRsc_WriteRowViewResource (unsigned NumRsc,
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struct PrgRsc_Resource *Resource)
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{
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/***** Begin row *****/
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HTM_TR_Begin (NULL);
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/***** Resource number *****/
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HTM_TD_Begin ("class=\"PRG_NUM PRG_RSC_%s RT %s\"",
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The_GetSuffix (),The_GetColorRows ());
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HTM_Unsigned (NumRsc + 1);
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HTM_TD_End ();
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/***** Title *****/
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HTM_TD_Begin ("class=\"PRG_MAIN PRG_RSC_%s %s\"",
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The_GetSuffix (),The_GetColorRows ());
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HTM_Txt (Resource->Title);
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HTM_TD_End ();
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/***** End row *****/
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HTM_TR_End ();
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}
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/*****************************************************************************/
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/************************** Edit one item resource ***************************/
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/*****************************************************************************/
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static void PrgRsc_WriteRowEditResource (unsigned NumRsc,unsigned NumResources,
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struct PrgRsc_Resource *Resource)
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{
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/***** Begin row *****/
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HTM_TR_Begin (NULL);
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/***** Forms to remove/edit this item resource *****/
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HTM_TD_Begin ("class=\"PRG_COL1 LT %s\"",The_GetColorRows ());
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PrgRsc_PutFormsToRemEditOneResource (NumRsc,NumResources,Resource);
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HTM_TD_End ();
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/***** Resource number *****/
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HTM_TD_Begin ("class=\"PRG_NUM PRG_RSC_%s RT %s\"",
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The_GetSuffix (),The_GetColorRows ());
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HTM_Unsigned (NumRsc + 1);
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HTM_TD_End ();
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/***** Title *****/
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HTM_TD_Begin ("class=\"PRG_MAIN PRG_RSC_%s %s\"",
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The_GetSuffix (),The_GetColorRows ());
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HTM_Txt (Resource->Title);
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HTM_TD_End ();
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/***** End row *****/
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HTM_TR_End ();
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}
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/*****************************************************************************/
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/**************** Put a link (form) to edit one program item *****************/
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/*****************************************************************************/
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static void PrgRsc_PutFormsToRemEditOneResource (unsigned NumRsc,
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unsigned NumResources,
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struct PrgRsc_Resource *Resource)
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{
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static Act_Action_t ActionHideUnhide[2] =
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{
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[false] = ActHidPrgRsc, // Visible ==> action to hide
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[true ] = ActUnhPrgRsc, // Hidden ==> action to unhide
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};
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extern const char *Txt_Movement_not_allowed;
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switch (Gbl.Usrs.Me.Role.Logged)
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{
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case Rol_TCH:
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case Rol_SYS_ADM:
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/***** Icon to remove item resource *****/
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Ico_PutContextualIconToRemove (ActReqRemPrgRsc,PrgRsc_RESOURCE_SECTION_ID,
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PrgRsc_PutParams,&Resource->Rsc.Cod);
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/***** Icon to hide/unhide item resource *****/
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Ico_PutContextualIconToHideUnhide (ActionHideUnhide,PrgRsc_RESOURCE_SECTION_ID,
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PrgRsc_PutParams,&Resource->Rsc.Cod,
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Resource->Hidden);
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/***** Icon to edit program resource *****/
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// Ico_PutContextualIconToEdit (ActFrmChgPrgItm,"item_form",
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// Prg_PutParams,&Item->Hierarchy.ItmCod);
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/***** Icon to add a new resource after this resource *****/
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// Ico_PutContextualIconToAdd (ActFrmNewPrgItm,"item_form",
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// Prg_PutParams,&Item->Hierarchy.ItmCod);
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/***** Icon to move up the item *****/
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if (NumRsc > 0)
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Lay_PutContextualLinkOnlyIcon (ActUp_PrgRsc,PrgRsc_RESOURCE_SECTION_ID,
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PrgRsc_PutParams,&Resource->Rsc.Cod,
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"arrow-up.svg",Ico_BLACK);
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else
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Ico_PutIconOff ("arrow-up.svg",Ico_BLACK,Txt_Movement_not_allowed);
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/***** Put icon to move down the item *****/
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if (NumRsc < NumResources - 1)
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Lay_PutContextualLinkOnlyIcon (ActDwnPrgRsc,PrgRsc_RESOURCE_SECTION_ID,
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PrgRsc_PutParams,&Resource->Rsc.Cod,
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"arrow-down.svg",Ico_BLACK);
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else
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Ico_PutIconOff ("arrow-down.svg",Ico_BLACK,Txt_Movement_not_allowed);
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break;
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case Rol_STD:
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case Rol_NET:
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break;
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default:
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break;
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}
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}
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/*****************************************************************************/
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/******************** Params used to edit a program item *********************/
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/*****************************************************************************/
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|
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static void PrgRsc_PutParams (void *RscCod)
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|
{
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if (RscCod)
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if (*((long *) RscCod) > 0)
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PrgRsc_PutParamRscCod (*((long *) RscCod));
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|
}
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|
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/*****************************************************************************/
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/**************** Write parameter with code of program item ******************/
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/*****************************************************************************/
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static void PrgRsc_PutParamRscCod (long RscCod)
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{
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Par_PutHiddenParamLong (NULL,"RscCod",RscCod);
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}
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/*****************************************************************************/
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/***************** Get parameter with code of item resource ******************/
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/*****************************************************************************/
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|
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static long PrgRsc_GetParamRscCod (void)
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{
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return Par_GetParToLong ("RscCod");
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}
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/*****************************************************************************/
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/************ Ask for confirmation of removing an item resource **************/
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/*****************************************************************************/
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void PrgRsc_ReqRemResource (void)
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{
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extern const char *Txt_Do_you_really_want_to_remove_the_resource_X;
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struct PrgRsc_Resource Resource;
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long ItmCod;
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unsigned FormLevel;
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/***** Get list of program items *****/
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Prg_GetListItems ();
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/***** Get data of the item resource from database *****/
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Resource.Rsc.Cod = PrgRsc_GetParamRscCod ();
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PrgRsc_GetDataOfResourceByCod (&Resource);
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if (Resource.ItmCod <= 0)
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Err_WrongResourceExit ();
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/***** Create alert to remove the item resource *****/
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Ale_CreateAlert (Ale_QUESTION,PrgRsc_RESOURCE_SECTION_ID,
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Txt_Do_you_really_want_to_remove_the_resource_X,
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Resource.Title);
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PrgSrc_RscCodToBeRemoved = Resource.Rsc.Cod;
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|
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/***** Get the code of the program item *****/
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ItmCod = Resource.ItmCod;
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FormLevel = Prg_GetLevelFromNumItem (Prg_GetNumItemFromItmCod (Resource.ItmCod));
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/***** Show current program items, if any *****/
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Prg_ShowAllItems (Prg_EDIT_RESOURCES,NULL,-1L,ItmCod,FormLevel);
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|
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/***** Free list of program items *****/
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Prg_FreeListItems ();
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}
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|
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/*****************************************************************************/
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/**************************** Remove an item resource ************************/
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/*****************************************************************************/
|
|
|
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void PrgRsc_RemoveResource (void)
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{
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extern const char *Txt_Resource_X_removed;
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struct PrgRsc_Resource Resource;
|
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long ItmCod;
|
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unsigned FormLevel;
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|
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/***** Get list of program items *****/
|
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Prg_GetListItems ();
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|
|
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/***** Get data of the item resource from database *****/
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Resource.Rsc.Cod = PrgRsc_GetParamRscCod ();
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PrgRsc_GetDataOfResourceByCod (&Resource);
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if (Resource.ItmCod <= 0)
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Err_WrongResourceExit ();
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|
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/***** Remove resource *****/
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Prg_DB_RemoveResource (&Resource);
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|
|
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/***** Create alert to remove the item resource *****/
|
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Ale_CreateAlert (Ale_SUCCESS,PrgRsc_RESOURCE_SECTION_ID,
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Txt_Resource_X_removed,Resource.Title);
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|
|
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/***** Get the code of the program item *****/
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ItmCod = Resource.ItmCod;
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FormLevel = Prg_GetLevelFromNumItem (Prg_GetNumItemFromItmCod (Resource.ItmCod));
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|
|
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/***** Show current program items, if any *****/
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Prg_ShowAllItems (Prg_EDIT_RESOURCES,NULL,-1L,ItmCod,FormLevel);
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|
|
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/***** Free list of program items *****/
|
|
Prg_FreeListItems ();
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/***************************** Hide a program item ***************************/
|
|
/*****************************************************************************/
|
|
|
|
void PrgRsc_HideResource (void)
|
|
{
|
|
PrgRsc_HideOrUnhideResource (true);
|
|
}
|
|
|
|
void PrgRsc_UnhideResource (void)
|
|
{
|
|
PrgRsc_HideOrUnhideResource (false);
|
|
}
|
|
|
|
static void PrgRsc_HideOrUnhideResource (bool Hide)
|
|
{
|
|
struct PrgRsc_Resource Resource;
|
|
long ItmCod;
|
|
unsigned FormLevel;
|
|
|
|
/***** Get list of program items *****/
|
|
Prg_GetListItems ();
|
|
|
|
/***** Get data of the item resource from database *****/
|
|
Resource.Rsc.Cod = PrgRsc_GetParamRscCod ();
|
|
PrgRsc_GetDataOfResourceByCod (&Resource);
|
|
if (Resource.ItmCod <= 0)
|
|
Err_WrongResourceExit ();
|
|
|
|
/***** Hide/unhide item resource *****/
|
|
Prg_DB_HideOrUnhideResource (Resource.Rsc.Cod,Hide);
|
|
|
|
/***** Get the code of the program item *****/
|
|
ItmCod = Resource.ItmCod;
|
|
FormLevel = Prg_GetLevelFromNumItem (Prg_GetNumItemFromItmCod (Resource.ItmCod));
|
|
|
|
/***** Show current program items, if any *****/
|
|
Prg_ShowAllItems (Prg_EDIT_RESOURCES,NULL,-1L,ItmCod,FormLevel);
|
|
|
|
/***** Free list of program items *****/
|
|
Prg_FreeListItems ();
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/**************************** Move up/down resource **************************/
|
|
/*****************************************************************************/
|
|
|
|
void PrgRsc_MoveUpResource (void)
|
|
{
|
|
PrgRsc_MoveUpDownResource (PrgRsc_MOVE_UP);
|
|
}
|
|
|
|
void PrgRsc_MoveDownResource (void)
|
|
{
|
|
PrgRsc_MoveUpDownResource (PrgRsc_MOVE_DOWN);
|
|
}
|
|
|
|
static void PrgRsc_MoveUpDownResource (PrgRsc_MoveUpDown_t UpDown)
|
|
{
|
|
extern const char *Txt_Movement_not_allowed;
|
|
struct PrgRsc_Resource Resource;
|
|
struct PrgRsc_Rsc Rsc2;
|
|
long ItmCod;
|
|
unsigned FormLevel;
|
|
bool Success = false;
|
|
static unsigned (*GetOtherRscInd[PrgRsc_NUM_MOVEMENTS_UP_DOWN])(long ItmCod,unsigned RscInd) =
|
|
{
|
|
[PrgRsc_MOVE_UP ] = Prg_DB_GetRscIndBefore,
|
|
[PrgRsc_MOVE_DOWN] = Prg_DB_GetRscIndAfter,
|
|
};
|
|
|
|
/***** Get list of program items *****/
|
|
Prg_GetListItems ();
|
|
|
|
/***** Get data of the item resource from database *****/
|
|
Resource.Rsc.Cod = PrgRsc_GetParamRscCod ();
|
|
PrgRsc_GetDataOfResourceByCod (&Resource);
|
|
if (Resource.ItmCod <= 0)
|
|
Err_WrongResourceExit ();
|
|
|
|
/***** Move up/down resource *****/
|
|
if ((Rsc2.Ind = GetOtherRscInd[UpDown] (Resource.ItmCod,Resource.Rsc.Ind))) // 0 ==> movement not allowed
|
|
{
|
|
/* Get the other resource code */
|
|
Rsc2.Cod = Prg_DB_GetRscCodFromRscInd (Resource.ItmCod,Rsc2.Ind);
|
|
|
|
/* Exchange subtrees */
|
|
Success = PrgRsc_ExchangeResources (&Resource.Rsc,&Rsc2);
|
|
}
|
|
if (!Success)
|
|
Ale_ShowAlert (Ale_WARNING,Txt_Movement_not_allowed);
|
|
|
|
/***** Get the code of the program item *****/
|
|
ItmCod = Resource.ItmCod;
|
|
FormLevel = Prg_GetLevelFromNumItem (Prg_GetNumItemFromItmCod (Resource.ItmCod));
|
|
|
|
/***** Show current program items, if any *****/
|
|
Prg_ShowAllItems (Prg_EDIT_RESOURCES,NULL,-1L,ItmCod,FormLevel);
|
|
|
|
/***** Free list of program items *****/
|
|
Prg_FreeListItems ();
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/**** Exchange the order of two consecutive subtrees in a course program *****/
|
|
/*****************************************************************************/
|
|
// Return true if success
|
|
|
|
static bool PrgRsc_ExchangeResources (const struct PrgRsc_Rsc *Rsc1,
|
|
const struct PrgRsc_Rsc *Rsc2)
|
|
{
|
|
if (Rsc1->Ind > 0 && // Indexes should be in the range [1, 2,...]
|
|
Rsc2->Ind > 0)
|
|
{
|
|
/***** Lock table to make the move atomic *****/
|
|
Prg_DB_LockTableResources ();
|
|
|
|
/***** Exchange indexes of items *****/
|
|
// This implementation works with non continuous indexes
|
|
/*
|
|
Example:
|
|
Rsc1->Ind = 5
|
|
Rsc2->Ind = 17
|
|
Step 1 Step 2 Step 3 (Equivalent to)
|
|
+-------+-------+ +-------+-------+ +-------+-------+ +-------+-------+ +-------+-------+
|
|
|Rsc.Ind|Rsc.Cod| |Rsc.Ind|Rsc.Cod| |Rsc.Ind|Rsc.Cod| |Rsc.Ind|Rsc.Cod| |Rsc.Ind|Rsc.Cod|
|
|
+-------+-------+ +-------+-------+ +-------+-------+ +-------+-------+ +-------+-------+
|
|
| 5 | 218 | | 5 | 218 |-->|--> 17 | 218 | | 17 | 218 | | 5 | 240 |
|
|
| 17 | 240 |-->|-->-17 | 240 | | -17 | 240 |-->|--> 5 | 240 | | 17 | 218 |
|
|
+-------+-------+ +-------+-------+ +-------+-------+ +-------+-------+ +-------+-------+
|
|
*/
|
|
/* Step 1: Change second index to negative,
|
|
necessary to preserve unique index (ItmCod,RscInd) */
|
|
Prg_DB_UpdateRscInd (Rsc2->Cod,-(int) Rsc2->Ind);
|
|
|
|
/* Step 2: Change first index */
|
|
Prg_DB_UpdateRscInd (Rsc1->Cod, (int) Rsc2->Ind);
|
|
|
|
/* Step 3: Change second index */
|
|
Prg_DB_UpdateRscInd (Rsc2->Cod, (int) Rsc1->Ind);
|
|
|
|
/***** Unlock table *****/
|
|
DB_UnlockTables ();
|
|
|
|
return true; // Success
|
|
}
|
|
|
|
return false; // No success
|
|
}
|