// swad_timeline_user.c: social timeline users

/*
    SWAD (Shared Workspace At a Distance),
    is a web platform developed at the University of Granada (Spain),
    and used to support university teaching.

    This file is part of SWAD core.
    Copyright (C) 1999-2021 Antonio Caņas Vargas

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General 3 License as
    published by the Free Software Foundation, either version 3 of the
    License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/*****************************************************************************/
/*********************************** Headers *********************************/
/*****************************************************************************/

#define _GNU_SOURCE 		// For asprintf
#include <linux/limits.h>	// For PATH_MAX
#include <stdio.h>		// For asprintf

#include "swad_global.h"
#include "swad_photo.h"
#include "swad_timeline.h"
#include "swad_timeline_database.h"
#include "swad_timeline_favourite.h"
#include "swad_timeline_user.h"

/*****************************************************************************/
/****************************** Public constants *****************************/
/*****************************************************************************/

/*****************************************************************************/
/************************* Private constants and types ***********************/
/*****************************************************************************/

/*****************************************************************************/
/************** External global variables from others modules ****************/
/*****************************************************************************/

extern struct Globals Gbl;

/*****************************************************************************/
/************************* Private global variables **************************/
/*****************************************************************************/

/*****************************************************************************/
/***************************** Private prototypes ****************************/
/*****************************************************************************/

/*****************************************************************************/
/************* Remove all the content of a user from database ****************/
/*****************************************************************************/

void TL_Usr_RemoveUsrContent (long UsrCod)
  {
   /***** Remove favs for comments *****/
   /* Remove all favs made by this user to any comment */
   TL_DB_RemoveAllFavsMadeByUsr (TL_Fav_COMM,UsrCod);

   /* Remove all favs to comments of this user */
   TL_DB_RemoveAllFavsToPubsBy (TL_Fav_COMM,UsrCod);

   /* Remove all favs to all comments in all notes authored by this user */
   TL_DB_RemoveAllFavsToAllCommsInAllNotesBy (UsrCod);

   /***** Remove favs for notes *****/
   /* Remove all favs made by this user to any note */
   TL_DB_RemoveAllFavsMadeByUsr (TL_Fav_NOTE,UsrCod);

   /* Remove all favs to notes of this user */
   TL_DB_RemoveAllFavsToPubsBy (TL_Fav_NOTE,UsrCod);

   /***** Remove comments *****/
   /* Remove all comments in all the notes of this user */
   TL_DB_RemoveAllCommsInAllNotesOf (UsrCod);

   /* Remove all comments made by this user in any note */
   TL_DB_RemoveAllCommsMadeBy (UsrCod);

   /***** Remove posts *****/
   /* Remove all posts of the user */
   TL_DB_RemoveAllPostsUsr (UsrCod);

   /***** Remove publications *****/
   /* Remove all publications (original, shared notes, comments)
      published by any user
      and related to notes authored by the user */
   TL_DB_RemoveAllPubsPublishedByAnyUsrOfNotesAuthoredBy (UsrCod);

   /* Remove all publications published by the user */
   TL_DB_RemoveAllPubsPublishedBy (UsrCod);

   /***** Remove notes *****/
   /* Remove all notes of the user */
   TL_DB_RemoveAllNotesUsr (UsrCod);
  }

/*****************************************************************************/
/************************ Show sharers or favouriters ************************/
/*****************************************************************************/

void TL_Usr_ShowNumSharersOrFavers (unsigned NumUsrs)
  {
   /***** Show number of sharers or favers
          (users who have shared or marked this note as favourite) *****/
   HTM_TxtF ("&nbsp;%u",NumUsrs);
  }

void TL_Usr_ShowSharersOrFavers (MYSQL_RES **mysql_res,
			         unsigned NumUsrs,unsigned NumFirstUsrs)
  {
   MYSQL_ROW row;
   unsigned NumUsr;
   struct UsrData UsrDat;

   /***** Trivial check 1: are there favers or sharers? *****/
   if (!NumUsrs)
      return;

   /***** Trivial check 1: number of favers or sharers to show *****/
   if (!NumFirstUsrs)
      return;

   /***** Initialize structure with user's data *****/
   Usr_UsrDataConstructor (&UsrDat);

   /***** List users *****/
   for (NumUsr = 0;
	NumUsr < NumFirstUsrs;
	NumUsr++)
     {
      /***** Get user's code *****/
      row = mysql_fetch_row (*mysql_res);
      UsrDat.UsrCod = Str_ConvertStrCodToLongCod (row[0]);

      /***** Get user's data and show user's photo *****/
      if (Usr_ChkUsrCodAndGetAllUsrDataFromUsrCod (&UsrDat,Usr_DONT_GET_PREFS))
	{
	 /* Begin container */
	 HTM_DIV_Begin ("class=\"TL_SHARER\"");

	    /* User's photo */
	    Pho_ShowUsrPhotoIfAllowed (&UsrDat,"PHOTO12x16",Pho_ZOOM,true);	// Use unique id

	 /* End container */
	 HTM_DIV_End ();
	}
     }

   /***** Free memory used for user's data *****/
   Usr_UsrDataDestructor (&UsrDat);
  }

/*****************************************************************************/
/***************** Check if I can fav/share a note/comment *******************/
/*****************************************************************************/

bool TL_Usr_CheckICanFavSha (long Cod,long UsrCod)
  {
   extern const char *Txt_The_post_no_longer_exists;

   /***** Trivial check 1: note/comment code should be > 0 *****/
   if (Cod <= 0)
     {
      Ale_ShowAlert (Ale_WARNING,Txt_The_post_no_longer_exists);
      return false;
     }

   /***** Trivial check 2: I must be logged
			   I can not fav/share my own notes/comments *****/
   if (!Gbl.Usrs.Me.Logged || Usr_ItsMe (UsrCod))
     {
      Lay_NoPermissionExit ();
      return false;	// Not reached
     }

   return true;
  }