mirror of https://github.com/acanas/swad-core.git
264 lines
9.7 KiB
C
264 lines
9.7 KiB
C
// swad_forum_database.c: forums operations with database
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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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// #define _GNU_SOURCE // For asprintf
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#include <stdbool.h> // For boolean type
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// #include <malloc.h> // For malloc
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// #include <mysql/mysql.h> // To access MySQL databases
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// #include <stddef.h> // For NULL
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// #include <stdio.h> // For asprintf
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// #include <string.h>
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// #include <time.h> // For time_t
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// #include "swad_action.h"
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// #include "swad_box.h"
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// #include "swad_config.h"
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#include "swad_database.h"
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// #include "swad_error.h"
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// #include "swad_figure.h"
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// #include "swad_form.h"
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#include "swad_forum.h"
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#include "swad_forum_database.h"
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#include "swad_global.h"
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// #include "swad_hierarchy.h"
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// #include "swad_HTML.h"
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// #include "swad_layout.h"
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// #include "swad_logo.h"
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// #include "swad_message.h"
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// #include "swad_notification.h"
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// #include "swad_pagination.h"
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// #include "swad_parameter.h"
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// #include "swad_profile.h"
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// #include "swad_role.h"
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// #include "swad_timeline.h"
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// #include "swad_timeline_database.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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/************************ Public constants and types *************************/
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/*****************************************************************************/
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/*****************************************************************************/
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/*********************** Private constants and types *************************/
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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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/**************** Insert new post in the table of forum posts ****************/
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/*****************************************************************************/
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long For_DB_InsertForumPst (long ThrCod,long UsrCod,
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const char *Subject,const char *Content,
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long MedCod)
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{
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return
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DB_QueryINSERTandReturnCode ("can not create a new post in a forum",
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"INSERT INTO for_posts"
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" (ThrCod,UsrCod,CreatTime,ModifTime,NumNotif,"
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"Subject,Content,MedCod)"
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" VALUES"
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" (%ld,%ld,NOW(),NOW(),0,"
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"'%s','%s',%ld)",
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ThrCod,
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UsrCod,
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Subject,
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Content,
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MedCod);
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}
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/*****************************************************************************/
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/******************** Get if a forum post exists in database *****************/
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/*****************************************************************************/
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bool For_DB_GetIfForumPstExists (long PstCod)
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{
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return (DB_QueryCOUNT ("can not check if a post of a forum already existed",
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"SELECT COUNT(*)"
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" FROM for_posts"
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" WHERE PstCod=%ld",
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PstCod) != 0); // Post exists if it appears in table of forum posts
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}
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/*****************************************************************************/
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/*********** Get the number of posts in the thread than holds a post *********/
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/*****************************************************************************/
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unsigned For_DB_GetThreadAndNumPostsGivenPstCod (MYSQL_RES **mysql_res,long PstCod)
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{
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return (unsigned)
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DB_QuerySELECT (mysql_res,"can not get number of posts in a thread",
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"SELECT ThrCod," // row[1]
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" COUNT(PstCod)" // row[0]
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" FROM for_posts"
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" WHERE ThrCod IN"
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" (SELECT ThrCod"
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" FROM for_posts"
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" WHERE PstCod=%ld)"
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" GROUP BY ThrCod;",
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PstCod);
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}
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/*****************************************************************************/
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/********************* Remove post from forum posts table ********************/
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/*****************************************************************************/
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void For_DB_RemovePst (long PstCod)
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{
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DB_QueryDELETE ("can not remove a post from a forum",
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"DELETE FROM for_posts"
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" WHERE PstCod=%ld",
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PstCod);
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}
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/*****************************************************************************/
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/************************ Remove all posts in a thread ***********************/
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/*****************************************************************************/
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void For_DB_RemoveThreadPsts (long ThrCod)
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{
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DB_QueryDELETE ("can not remove the posts of a thread of a forum",
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"DELETE FROM for_posts"
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" WHERE ThrCod=%ld",
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ThrCod);
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}
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/*****************************************************************************/
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/*************** Insert a new thread in table of forum threads ***************/
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/*****************************************************************************/
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// Returns the code of the new inserted thread
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long For_DB_InsertForumThread (const struct For_Forums *Forums,
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long FirstPstCod)
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{
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return
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DB_QueryINSERTandReturnCode ("can not create a new thread in a forum",
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"INSERT INTO for_threads"
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" (ForumType,Location,FirstPstCod,LastPstCod)"
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" VALUES"
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" (%u,%ld,%ld,%ld)",
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(unsigned) Forums->Forum.Type,
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Forums->Forum.Location,
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FirstPstCod,
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FirstPstCod);
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}
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/*****************************************************************************/
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/********************* Get the thread subject from a thread ******************/
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/*****************************************************************************/
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void For_DB_GetThrSubject (long ThrCod,char Subject[Cns_MAX_BYTES_SUBJECT + 1])
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{
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DB_QuerySELECTString (Subject,Cns_MAX_BYTES_SUBJECT,
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"can not get the subject of a thread of a forum",
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"SELECT for_posts.Subject" // row[0]
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" FROM for_threads,"
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"for_posts"
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" WHERE for_threads.ThrCod=%ld"
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" AND for_threads.FirstPstCod=for_posts.PstCod",
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ThrCod);
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}
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/*****************************************************************************/
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/*************** Delete a thread from the forum thread table *****************/
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/*****************************************************************************/
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void For_DB_RemoveThread (long ThrCod)
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{
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DB_QueryDELETE ("can not remove a thread from a forum",
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"DELETE FROM for_threads"
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" WHERE ThrCod=%ld",
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ThrCod);
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}
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/*****************************************************************************/
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/****************** Insert post into table of banned posts *******************/
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/*****************************************************************************/
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void For_DB_InsertPstIntoDisabled (long PstCod)
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{
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DB_QueryREPLACE ("can not ban a post of a forum",
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"REPLACE INTO for_disabled"
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" (PstCod,UsrCod,DisableTime)"
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" VALUES"
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" (%ld,%ld,NOW())",
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PstCod,
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Gbl.Usrs.Me.UsrDat.UsrCod);
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}
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/*****************************************************************************/
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/*********************** Get if a forum post is enabled **********************/
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/*****************************************************************************/
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bool For_DB_GetIfPstIsEnabled (long PstCod)
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{
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/***** Trivial check: post code should be > 0 *****/
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if (PstCod <= 0)
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return false;
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/***** Get if post is disabled from database *****/
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return (DB_QueryCOUNT ("can not check if a post of a forum is disabled",
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"SELECT COUNT(*)"
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" FROM for_disabled"
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" WHERE PstCod=%ld",
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PstCod) == 0); // Post is enabled if it does not appear in table of disabled posts
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}
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/*****************************************************************************/
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/****************** Remove post from table of disabled posts *****************/
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/*****************************************************************************/
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void For_DB_RemovePstFromDisabled (long PstCod)
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{
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DB_QueryDELETE ("can not unban a post of a forum",
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"DELETE FROM for_disabled"
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" WHERE PstCod=%ld",
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PstCod);
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}
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/*****************************************************************************/
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/*********************** Delete disabled posts in thread *********************/
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/*****************************************************************************/
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void For_DB_RemoveDisabledPstsInThread (long ThrCod)
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{
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DB_QueryDELETE ("can not unban the posts of a thread of a forum",
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"DELETE FROM for_disabled"
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"USING for_posts,"
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"for_disabled"
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" WHERE for_posts.ThrCod=%ld"
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" AND for_posts.PstCod=for_disabled.PstCod",
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ThrCod);
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}
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