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239 lines
9.1 KiB
C
239 lines
9.1 KiB
C
// swad_timeline_database.c: social timeline 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 3 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_database.h"
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#include "swad_timeline.h"
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#include "swad_timeline_database.h"
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#include "swad_timeline_publication.h"
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/*****************************************************************************/
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/****************************** Public constants *****************************/
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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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/************** External global variables from others modules ****************/
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/*****************************************************************************/
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/*****************************************************************************/
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/************************* Private global variables **************************/
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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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/********************* Get number of comments in a note **********************/
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/*****************************************************************************/
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unsigned TL_DB_GetNumCommentsInNote (long NotCod)
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{
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return (unsigned)
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DB_QueryCOUNT ("can not get number of comments in a note",
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"SELECT COUNT(*) FROM tl_pubs"
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" WHERE NotCod=%ld AND PubType=%u",
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NotCod,(unsigned) TL_Pub_COMMENT_TO_NOTE);
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}
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/*****************************************************************************/
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/************** Get initial comments of a note from database *****************/
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/*****************************************************************************/
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// Returns the number of rows got
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unsigned TL_DB_GetInitialComments (long NotCod,
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unsigned NumInitialCommentsToGet,
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MYSQL_RES **mysql_res)
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{
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return (unsigned)
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DB_QuerySELECT (mysql_res,"can not get comments",
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"SELECT tl_pubs.PubCod," // row[0]
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"tl_pubs.PublisherCod," // row[1]
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"tl_pubs.NotCod," // row[2]
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"UNIX_TIMESTAMP(tl_pubs.TimePublish),"// row[3]
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"tl_comments.Txt," // row[4]
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"tl_comments.MedCod" // row[5]
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" FROM tl_pubs,tl_comments"
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" WHERE tl_pubs.NotCod=%ld"
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" AND tl_pubs.PubType=%u"
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" AND tl_pubs.PubCod=tl_comments.PubCod"
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" ORDER BY tl_pubs.PubCod"
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" LIMIT %lu",
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NotCod,(unsigned) TL_Pub_COMMENT_TO_NOTE,
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NumInitialCommentsToGet);
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}
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/*****************************************************************************/
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/*************** Get final comments of a note from database ******************/
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/*****************************************************************************/
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// Returns the number of rows got
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unsigned TL_DB_GetFinalComments (long NotCod,
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unsigned NumFinalCommentsToGet,
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MYSQL_RES **mysql_res)
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{
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/***** Get final comments of a note from database *****/
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return (unsigned)
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DB_QuerySELECT (mysql_res,"can not get comments",
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"SELECT * FROM "
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"("
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"SELECT tl_pubs.PubCod," // row[0]
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"tl_pubs.PublisherCod," // row[1]
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"tl_pubs.NotCod," // row[2]
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"UNIX_TIMESTAMP(tl_pubs.TimePublish),"// row[3]
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"tl_comments.Txt," // row[4]
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"tl_comments.MedCod" // row[5]
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" FROM tl_pubs,tl_comments"
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" WHERE tl_pubs.NotCod=%ld"
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" AND tl_pubs.PubType=%u"
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" AND tl_pubs.PubCod=tl_comments.PubCod"
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" ORDER BY tl_pubs.PubCod DESC LIMIT %u"
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") AS comments"
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" ORDER BY PubCod",
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NotCod,(unsigned) TL_Pub_COMMENT_TO_NOTE,
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NumFinalCommentsToGet);
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}
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/*****************************************************************************/
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/******************* Get data of comment using its code **********************/
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/*****************************************************************************/
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// Returns the number of rows got
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unsigned TL_DB_GetDataOfCommByCod (long PubCod,MYSQL_RES **mysql_res)
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{
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/***** Trivial check: publication code should be > 0 *****/
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if (PubCod <= 0)
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return 0;
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/***** Get data of comment from database *****/
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return (unsigned)
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DB_QuerySELECT (&mysql_res,"can not get data of comment",
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"SELECT tl_pubs.PubCod," // row[0]
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"tl_pubs.PublisherCod," // row[1]
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"tl_pubs.NotCod," // row[2]
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"UNIX_TIMESTAMP(tl_pubs.TimePublish),"// row[3]
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"tl_comments.Txt," // row[4]
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"tl_comments.MedCod" // row[5]
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" FROM tl_pubs,tl_comments"
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" WHERE tl_pubs.PubCod=%ld"
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" AND tl_pubs.PubType=%u"
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" AND tl_pubs.PubCod=tl_comments.PubCod",
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PubCod,(unsigned) TL_Pub_COMMENT_TO_NOTE);
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}
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/*****************************************************************************/
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/******************* Insert comment content in database **********************/
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/*****************************************************************************/
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void TL_DB_InsertCommentContent (long PubCod,
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const struct TL_Pst_PostContent *Content)
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{
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/***** Insert comment content in database *****/
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DB_QueryINSERT ("can not store comment content",
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"INSERT INTO tl_comments"
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" (PubCod,Txt,MedCod)"
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" VALUES"
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" (%ld,'%s',%ld)",
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PubCod,
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Content->Txt,
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Content->Media.MedCod);
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}
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/*****************************************************************************/
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/**************** Get code of media associated to comment ********************/
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/*****************************************************************************/
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long TL_DB_GetMedCodFromComment (long PubCod)
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{
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MYSQL_RES *mysql_res;
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MYSQL_ROW row;
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long MedCod = -1L; // Default value
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/***** Get code of media associated to comment *****/
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if (DB_QuerySELECT (&mysql_res,"can not get media code",
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"SELECT MedCod" // row[0]
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" FROM tl_comments"
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" WHERE PubCod=%ld",
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PubCod) == 1) // Result should have a unique row
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{
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/* Get media code */
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row = mysql_fetch_row (mysql_res);
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MedCod = Str_ConvertStrCodToLongCod (row[0]);
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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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return MedCod;
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}
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/*****************************************************************************/
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/****************** Remove favs for comment from database ********************/
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/*****************************************************************************/
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void TL_DB_RemoveCommentFavs (long PubCod)
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{
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/***** Remove favs for comment *****/
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DB_QueryDELETE ("can not remove favs for comment",
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"DELETE FROM tl_comments_fav"
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" WHERE PubCod=%ld",
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PubCod);
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}
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/*****************************************************************************/
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/***************** Remove content of comment from database *******************/
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/*****************************************************************************/
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void TL_DB_RemoveCommentContent (long PubCod)
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{
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/***** Remove content of comment *****/
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DB_QueryDELETE ("can not remove comment content",
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"DELETE FROM tl_comments"
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" WHERE PubCod=%ld",
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PubCod);
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}
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/*****************************************************************************/
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/***************** Remove comment publication from database ******************/
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/*****************************************************************************/
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void TL_DB_RemoveCommentPub (long PubCod,long PublisherCod)
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{
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/***** Remove comment publication *****/
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DB_QueryDELETE ("can not remove comment",
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"DELETE FROM tl_pubs"
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" WHERE PubCod=%ld"
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" AND PublisherCod=%ld" // Extra check: author
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" AND PubType=%u", // Extra check: it's a comment
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PubCod,
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PublisherCod,
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(unsigned) TL_Pub_COMMENT_TO_NOTE);
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}
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