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swad-core/swad_follow.c

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// swad_follow.c: user's followers and followed
/*
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) 1999-2017 Antonio Cañas 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 *********************************/
/*****************************************************************************/
#include <stdbool.h> // For boolean type
#include <stdio.h> // For sprintf
#include <string.h> // For string functions
#include "swad_database.h"
#include "swad_follow.h"
#include "swad_global.h"
#include "swad_notification.h"
#include "swad_privacy.h"
#include "swad_profile.h"
#include "swad_user.h"
/*****************************************************************************/
/****************************** Public constants *****************************/
/*****************************************************************************/
/*****************************************************************************/
/***************************** Private constants *****************************/
/*****************************************************************************/
#define Fol_NUM_COLUMNS_FOLLOW 3
#define Fol_MAX_USRS_TO_FOLLOW_SUGGESTED (Fol_NUM_COLUMNS_FOLLOW * 3)
/*****************************************************************************/
/****************************** Internal types *******************************/
/*****************************************************************************/
/*****************************************************************************/
/************** External global variables from others modules ****************/
/*****************************************************************************/
extern struct Globals Gbl;
/*****************************************************************************/
/************************* Internal global variables *************************/
/*****************************************************************************/
/*****************************************************************************/
/***************************** Private prototypes ****************************/
/*****************************************************************************/
static void Fol_PutIconsWhoToFollow (void);
static void Fol_PutIconToUpdateWhoToFollow (void);
static void Fol_ShowNumberOfFollowingOrFollowers (const struct UsrData *UsrDat,
unsigned NumUsrs,
Act_Action_t Action,
const char *Title);
static void Fol_ListFollowingUsr (struct UsrData *UsrDat);
static void Fol_ListFollowersUsr (struct UsrData *UsrDat);
static void Fol_ShowFollowedOrFollower (struct UsrData *UsrDat);
/*****************************************************************************/
/********************** Put link to show users to follow **********************/
/*****************************************************************************/
void Fol_PutLinkWhoToFollow (void)
{
extern const char *Txt_Who_to_follow;
fprintf (Gbl.F.Out,"<div class=\"CONTEXT_MENU\">");
Lay_PutContextualLink (ActSeeSocPrf,NULL,
"follow64x64.png",
Txt_Who_to_follow,Txt_Who_to_follow,
NULL);
fprintf (Gbl.F.Out,"</div>");
}
/*****************************************************************************/
/***************************** Show users to follow **************************/
/*****************************************************************************/
void Fol_SuggestWhoToFollow (void)
{
extern const char *Hlp_SOCIAL_Profiles_who_to_follow;
extern const char *Pri_VisibilityDB[Pri_NUM_OPTIONS_PRIVACY];
extern const char *Txt_Who_to_follow;
extern const char *Txt_No_user_to_whom_you_can_follow_Try_again_later;
char Query[2048];
MYSQL_RES *mysql_res;
MYSQL_ROW row;
unsigned NumUsrs;
unsigned NumUsr;
struct UsrData UsrDat;
/***** Put link to request user's profile *****/
Prf_PutLinkRequestUserProfile ();
/***** First try: build query to get users to follow *****/
// Get only users with surname 1 and first name
sprintf (Query,"SELECT DISTINCT UsrCod FROM"
" ("
/***** Likely known users *****/
"(SELECT DISTINCT UsrCod FROM"
" ("
// Users followed by my followed whose privacy is
// Pri_VISIBILITY_SYSTEM or Pri_VISIBILITY_WORLD
"("
"SELECT DISTINCT usr_follow.FollowedCod AS UsrCod"
" FROM usr_follow,"
"(SELECT FollowedCod FROM usr_follow"
" WHERE FollowerCod='%ld') AS my_followed,"
" usr_data"
" WHERE usr_follow.FollowerCod=my_followed.FollowedCod"
" AND usr_follow.FollowedCod<>'%ld'"
" AND usr_follow.FollowedCod=usr_data.UsrCod"
" AND usr_data.ProfileVisibility IN ('%s','%s')"
" AND usr_data.Surname1<>''" // Surname 1 not empty
" AND usr_data.FirstName<>''" // First name not empty
")"
" UNION "
// Users who share any course with me
// and whose privacy is Pri_VISIBILITY_COURSE,
// Pri_VISIBILITY_SYSTEM or Pri_VISIBILITY_WORLD
"("
"SELECT DISTINCT crs_usr.UsrCod"
" FROM crs_usr,"
"(SELECT CrsCod FROM crs_usr"
" WHERE UsrCod='%ld') AS my_crs,"
" usr_data"
" WHERE crs_usr.CrsCod=my_crs.CrsCod"
" AND crs_usr.UsrCod<>'%ld'"
" AND crs_usr.UsrCod=usr_data.UsrCod"
" AND usr_data.ProfileVisibility IN ('%s','%s','%s')"
" AND usr_data.Surname1<>''" // Surname 1 not empty
" AND usr_data.FirstName<>''" // First name not empty
")"
" UNION "
// Users who share any course with me with another role
// and whose privacy is Pri_VISIBILITY_USER
"("
"SELECT DISTINCT crs_usr.UsrCod"
" FROM crs_usr,"
"(SELECT CrsCod,Role FROM crs_usr"
" WHERE UsrCod='%ld') AS my_crs_role,"
" usr_data"
" WHERE crs_usr.CrsCod=my_crs_role.CrsCod"
" AND crs_usr.Role<>my_crs_role.Role"
" AND crs_usr.UsrCod=usr_data.UsrCod"
" AND usr_data.ProfileVisibility='%s'"
" AND usr_data.Surname1<>''" // Surname 1 not empty
" AND usr_data.FirstName<>''" // First name not empty
")"
") AS LikelyKnownUsrsToFollow"
// Do not select my followed
" WHERE UsrCod NOT IN"
" (SELECT FollowedCod FROM usr_follow"
" WHERE FollowerCod='%ld')"
// Get only Fol_MAX_USRS_TO_FOLLOW_SUGGESTED * 2 users
" ORDER BY RAND() LIMIT %u"
")"
" UNION "
"("
/***** Likely unknown users *****/
// Add some likely unknown random users with privacy
// Pri_VISIBILITY_SYSTEM or Pri_VISIBILITY_WORLD
"SELECT UsrCod FROM usr_data"
" WHERE UsrCod<>'%ld'"
" AND ProfileVisibility IN ('%s','%s')"
" AND Surname1<>''" // Surname 1 not empty
" AND FirstName<>''" // First name not empty
// Do not select my followed
" AND UsrCod NOT IN"
" (SELECT FollowedCod FROM usr_follow"
" WHERE FollowerCod='%ld')"
// Get only Fol_MAX_USRS_TO_FOLLOW_SUGGESTED users
" ORDER BY RAND() LIMIT %u"
")"
") AS UsrsToFollow"
// Get only Fol_MAX_USRS_TO_FOLLOW_SUGGESTED users
" ORDER BY RAND() LIMIT %u",
Gbl.Usrs.Me.UsrDat.UsrCod,
Gbl.Usrs.Me.UsrDat.UsrCod,
Pri_VisibilityDB[Pri_VISIBILITY_SYSTEM],
Pri_VisibilityDB[Pri_VISIBILITY_WORLD ],
Gbl.Usrs.Me.UsrDat.UsrCod,
Gbl.Usrs.Me.UsrDat.UsrCod,
Pri_VisibilityDB[Pri_VISIBILITY_COURSE],
Pri_VisibilityDB[Pri_VISIBILITY_SYSTEM],
Pri_VisibilityDB[Pri_VISIBILITY_WORLD ],
Gbl.Usrs.Me.UsrDat.UsrCod,
Pri_VisibilityDB[Pri_VISIBILITY_USER ],
Gbl.Usrs.Me.UsrDat.UsrCod,
Fol_MAX_USRS_TO_FOLLOW_SUGGESTED * 2, // 2/3 likely known users
Gbl.Usrs.Me.UsrDat.UsrCod,
Pri_VisibilityDB[Pri_VISIBILITY_SYSTEM],
Pri_VisibilityDB[Pri_VISIBILITY_WORLD ],
Gbl.Usrs.Me.UsrDat.UsrCod,
Fol_MAX_USRS_TO_FOLLOW_SUGGESTED, // 1/3 likely unknown users
Fol_MAX_USRS_TO_FOLLOW_SUGGESTED);
/***** Get users *****/
NumUsrs = (unsigned) DB_QuerySELECT (Query,&mysql_res,"can not get followed users");
if (NumUsrs)
{
/***** Start frame *****/
Lay_StartRoundFrameTable ("560px",Txt_Who_to_follow,
Fol_PutIconsWhoToFollow,
Hlp_SOCIAL_Profiles_who_to_follow,2);
/***** Initialize structure with user's data *****/
Usr_UsrDataConstructor (&UsrDat);
/***** List users *****/
for (NumUsr = 0;
NumUsr < NumUsrs;
NumUsr++)
{
/***** Get user *****/
row = mysql_fetch_row (mysql_res);
/* Get user's code (row[0]) */
UsrDat.UsrCod = Str_ConvertStrCodToLongCod (row[0]);
/***** Show user *****/
if ((NumUsr % Fol_NUM_COLUMNS_FOLLOW) == 0)
fprintf (Gbl.F.Out,"<tr>");
if (Usr_ChkUsrCodAndGetAllUsrDataFromUsrCod (&UsrDat))
Fol_ShowFollowedOrFollower (&UsrDat);
if ((NumUsr % Fol_NUM_COLUMNS_FOLLOW) == (Fol_NUM_COLUMNS_FOLLOW-1) ||
NumUsr == NumUsrs - 1)
fprintf (Gbl.F.Out,"</tr>");
}
/***** Free memory used for user's data *****/
Usr_UsrDataDestructor (&UsrDat);
/***** End frame *****/
Lay_EndRoundFrameTable ();
}
else
Lay_ShowAlert (Lay_INFO,Txt_No_user_to_whom_you_can_follow_Try_again_later);
/***** Free structure that stores the query result *****/
DB_FreeMySQLResult (&mysql_res);
}
/*****************************************************************************/
/****************** Put contextual icons in "who to follow" ******************/
/*****************************************************************************/
static void Fol_PutIconsWhoToFollow (void)
{
/***** Put icon to update who to follow *****/
Fol_PutIconToUpdateWhoToFollow ();
/***** Put icon to show a figure *****/
Gbl.Stat.FigureType = Sta_FOLLOW;
Sta_PutIconToShowFigure ();
}
/*****************************************************************************/
/********************* Put icon to update who to follow **********************/
/*****************************************************************************/
static void Fol_PutIconToUpdateWhoToFollow (void)
{
extern const char *The_ClassFormBold[The_NUM_THEMES];
extern const char *Txt_Update;
Act_FormStart (ActSeeSocPrf);
Act_LinkFormSubmitAnimated (Txt_Update,The_ClassFormBold[Gbl.Prefs.Theme],
NULL);
Lay_PutCalculateIcon (Txt_Update);
Act_FormEnd ();
}
/*****************************************************************************/
/*************** Check if a user is a follower of another user ***************/
/*****************************************************************************/
bool Fol_CheckUsrIsFollowerOf (long FollowerCod,long FollowedCod)
{
char Query[256];
if (FollowerCod == FollowedCod)
return false;
/***** Check if a user is a follower of another user *****/
sprintf (Query,"SELECT COUNT(*) FROM usr_follow"
" WHERE FollowerCod='%ld' AND FollowedCod='%ld'",
FollowerCod,FollowedCod);
return (DB_QueryCOUNT (Query,"can not get if a user is a follower of another one") != 0);
}
/*****************************************************************************/
/*************************** Get number of followed **************************/
/*****************************************************************************/
unsigned Fol_GetNumFollowing (long UsrCod)
{
char Query[128];
/***** Check if a user is a follower of another user *****/
sprintf (Query,"SELECT COUNT(*) FROM usr_follow WHERE FollowerCod='%ld'",
UsrCod);
return DB_QueryCOUNT (Query,"can not get number of followed");
}
/*****************************************************************************/
/************************** Get number of followers **************************/
/*****************************************************************************/
unsigned Fol_GetNumFollowers (long UsrCod)
{
char Query[128];
/***** Check if a user is a follower of another user *****/
sprintf (Query,"SELECT COUNT(*) FROM usr_follow WHERE FollowedCod='%ld'",
UsrCod);
return DB_QueryCOUNT (Query,"can not get number of followers");
}
/*****************************************************************************/
/**************** Show following and followers of a user *********************/
/*****************************************************************************/
void Fol_ShowFollowingAndFollowers (const struct UsrData *UsrDat,
unsigned NumFollowing,unsigned NumFollowers,
bool UsrFollowsMe,bool IFollowUsr)
{
extern const char *Txt_FOLLOWS_YOU;
extern const char *Txt_Following;
extern const char *Txt_Followers;
extern const char *Txt_Following_unfollow;
extern const char *Txt_Unfollow;
extern const char *Txt_Follow;
bool ItsMe = (UsrDat->UsrCod == Gbl.Usrs.Me.UsrDat.UsrCod);
/***** Start section *****/
fprintf (Gbl.F.Out,"<section id=\"follow_section\">");
/***** Followed users *****/
fprintf (Gbl.F.Out,"<div id=\"following_side\">"
"<div class=\"FOLLOW_SIDE\">");
/* User follows me? */
fprintf (Gbl.F.Out,"<div id=\"follows_me\" class=\"DAT_LIGHT\">");
if (UsrFollowsMe)
fprintf (Gbl.F.Out,"%s",Txt_FOLLOWS_YOU);
fprintf (Gbl.F.Out,"</div>");
/* Number of followed */
Fol_ShowNumberOfFollowingOrFollowers (UsrDat,
NumFollowing,
ActSeeFlg,Txt_Following);
/* End following side */
fprintf (Gbl.F.Out,"</div>"
"</div>");
/***** Followers *****/
fprintf (Gbl.F.Out,"<div id=\"followers_side\">"
"<div class=\"FOLLOW_SIDE\">");
/* Number of followers */
Fol_ShowNumberOfFollowingOrFollowers (UsrDat,
NumFollowers,
ActSeeFlr,Txt_Followers);
/* I follow user? */
fprintf (Gbl.F.Out,"<div id=\"follow_usr\">");
if (Gbl.Usrs.Me.Logged && !ItsMe) // It's another logged user
{
if (IFollowUsr) // I follow this user
{
Act_FormStart (ActUnfUsr);
Usr_PutParamUsrCodEncrypted (UsrDat->EncryptedUsrCod);
Act_LinkFormSubmit (Txt_Following_unfollow,"REC_DAT_BOLD",NULL);
fprintf (Gbl.F.Out,"<div class=\"ICO_HIGHLIGHT\""
" style=\"display:inline;\" >"
"<img src=\"%s/following64x64.png\""
" alt=\"%s\" title=\"%s\""
" class=\"ICO40x40\" />"
"</div>"
"</a>",
Gbl.Prefs.IconsURL,
Txt_Unfollow,Txt_Following_unfollow);
Act_FormEnd ();
}
else // I do not follow this user
{
Act_FormStart (ActFolUsr);
Usr_PutParamUsrCodEncrypted (UsrDat->EncryptedUsrCod);
Act_LinkFormSubmit (Txt_Follow,"REC_DAT_BOLD",NULL);
fprintf (Gbl.F.Out,"<div class=\"ICO_HIGHLIGHT\""
" style=\"display:inline;\" >"
"<img src=\"%s/follow64x64.png\""
" alt=\"%s\" title=\"%s\""
" class=\"ICO40x40\" />"
"</div>"
"</a>",
Gbl.Prefs.IconsURL,
Txt_Follow,Txt_Follow);
Act_FormEnd ();
}
}
fprintf (Gbl.F.Out,"</div>");
/* End followers side */
fprintf (Gbl.F.Out,"</div>"
"</div>");
/***** End section *****/
fprintf (Gbl.F.Out,"</section>");
}
/*****************************************************************************/
/**************** Show following and followers of a user *********************/
/*****************************************************************************/
static void Fol_ShowNumberOfFollowingOrFollowers (const struct UsrData *UsrDat,
unsigned NumUsrs,
Act_Action_t Action,
const char *Title)
{
extern const char *The_ClassForm[The_NUM_THEMES];
extern const char *The_ClassFormBold[The_NUM_THEMES];
/***** Start container *****/
fprintf (Gbl.F.Out,"<div class=\"FOLLOW_BOX\">");
/***** Number *****/
if (NumUsrs)
{
/* Form to list users */
Act_FormStartAnchor (Action,"follow_section");
Usr_PutParamUsrCodEncrypted (UsrDat->EncryptedUsrCod);
Act_LinkFormSubmit (Title,
(Gbl.Action.Act == Action) ? "FOLLOW_NUM_B" :
"FOLLOW_NUM",NULL);
}
else
fprintf (Gbl.F.Out,"<span class=\"%s\">",
(Gbl.Action.Act == Action) ? "FOLLOW_NUM_B" :
"FOLLOW_NUM");
fprintf (Gbl.F.Out,"%u",NumUsrs);
if (NumUsrs)
{
fprintf (Gbl.F.Out,"</a>");
Act_FormEnd ();
}
else
fprintf (Gbl.F.Out,"</span>");
/***** Text *****/
fprintf (Gbl.F.Out,"<div class=\"%s\">",
(Gbl.Action.Act == Action) ? The_ClassFormBold[Gbl.Prefs.Theme] :
The_ClassForm[Gbl.Prefs.Theme]);
if (NumUsrs)
{
/* Form to list users */
Act_FormStartAnchor (Action,"follow_section");
Usr_PutParamUsrCodEncrypted (UsrDat->EncryptedUsrCod);
Act_LinkFormSubmit (Title,
(Gbl.Action.Act == Action) ? The_ClassFormBold[Gbl.Prefs.Theme] :
The_ClassForm[Gbl.Prefs.Theme],NULL);
}
fprintf (Gbl.F.Out,"%s",Title);
if (NumUsrs)
{
fprintf (Gbl.F.Out,"</a>");
Act_FormEnd ();
}
fprintf (Gbl.F.Out,"</div>");
/***** End container *****/
fprintf (Gbl.F.Out,"</div>");
}
/*****************************************************************************/
/***************************** List followed users ***************************/
/*****************************************************************************/
void Fol_ListFollowing (void)
{
extern const char *Txt_User_not_found_or_you_do_not_have_permission_;
/***** Get user to view user he/she follows *****/
Usr_GetParamOtherUsrCodEncryptedAndGetListIDs ();
if (Gbl.Usrs.Other.UsrDat.UsrCod > 0)
{
if (Usr_ChkUsrCodAndGetAllUsrDataFromUsrCod (&Gbl.Usrs.Other.UsrDat))
Fol_ListFollowingUsr (&Gbl.Usrs.Other.UsrDat);
else
Lay_ShowAlert (Lay_WARNING,Txt_User_not_found_or_you_do_not_have_permission_);
}
else // If user not specified, view my profile
Fol_ListFollowingUsr (&Gbl.Usrs.Me.UsrDat);
}
static void Fol_ListFollowingUsr (struct UsrData *UsrDat)
{
extern const char *Txt_Following;
extern const char *Txt_User_not_found_or_you_do_not_have_permission_;
char Query[256];
MYSQL_RES *mysql_res;
MYSQL_ROW row;
unsigned NumUsrs;
unsigned NumUsr;
struct UsrData FollowingUsrDat;
/***** Show user's profile *****/
if (Prf_ShowUserProfile (UsrDat))
{
/***** Check if a user is a follower of another user *****/
sprintf (Query,"SELECT FollowedCod FROM usr_follow"
" WHERE FollowerCod='%ld' ORDER BY FollowTime DESC",
UsrDat->UsrCod);
NumUsrs = (unsigned) DB_QuerySELECT (Query,&mysql_res,"can not get followed users");
if (NumUsrs)
{
/***** Initialize structure with user's data *****/
Usr_UsrDataConstructor (&FollowingUsrDat);
/***** Start listing *****/
Lay_StartRoundFrameTable ("560px",Txt_Following,NULL,NULL,2);
for (NumUsr = 0;
NumUsr < NumUsrs;
NumUsr++)
{
/***** Get user *****/
row = mysql_fetch_row (mysql_res);
/* Get user's code (row[0]) */
FollowingUsrDat.UsrCod = Str_ConvertStrCodToLongCod (row[0]);
/***** Show user *****/
if ((NumUsr % Fol_NUM_COLUMNS_FOLLOW) == 0)
fprintf (Gbl.F.Out,"<tr>");
if (Usr_ChkUsrCodAndGetAllUsrDataFromUsrCod (&FollowingUsrDat))
Fol_ShowFollowedOrFollower (&FollowingUsrDat);
if ((NumUsr % Fol_NUM_COLUMNS_FOLLOW) == (Fol_NUM_COLUMNS_FOLLOW-1) ||
NumUsr == NumUsrs - 1)
fprintf (Gbl.F.Out,"</tr>");
}
/***** End listing *****/
Lay_EndRoundFrameTable ();
/***** Free memory used for user's data *****/
Usr_UsrDataDestructor (&FollowingUsrDat);
}
/***** Free structure that stores the query result *****/
DB_FreeMySQLResult (&mysql_res);
}
else
Lay_ShowAlert (Lay_WARNING,Txt_User_not_found_or_you_do_not_have_permission_);
}
/*****************************************************************************/
/******************************* List followers ******************************/
/*****************************************************************************/
void Fol_ListFollowers (void)
{
extern const char *Txt_User_not_found_or_you_do_not_have_permission_;
/***** Get user to view user he/she follows *****/
Usr_GetParamOtherUsrCodEncryptedAndGetListIDs ();
if (Gbl.Usrs.Other.UsrDat.UsrCod > 0)
{
if (Usr_ChkUsrCodAndGetAllUsrDataFromUsrCod (&Gbl.Usrs.Other.UsrDat))
Fol_ListFollowersUsr (&Gbl.Usrs.Other.UsrDat);
else
Lay_ShowAlert (Lay_WARNING,Txt_User_not_found_or_you_do_not_have_permission_);
}
else // If user not specified, view my profile
Fol_ListFollowersUsr (&Gbl.Usrs.Me.UsrDat);
}
static void Fol_ListFollowersUsr (struct UsrData *UsrDat)
{
extern const char *Txt_Followers;
extern const char *Txt_User_not_found_or_you_do_not_have_permission_;
char Query[256];
MYSQL_RES *mysql_res;
MYSQL_ROW row;
unsigned NumUsrs;
unsigned NumUsr;
struct UsrData FollowerUsrDat;
/***** Show user's profile *****/
if (Prf_ShowUserProfile (UsrDat))
{
/***** Check if a user is a follower of another user *****/
sprintf (Query,"SELECT FollowerCod FROM usr_follow"
" WHERE FollowedCod='%ld' ORDER BY FollowTime DESC",
UsrDat->UsrCod);
NumUsrs = (unsigned) DB_QuerySELECT (Query,&mysql_res,"can not get followers");
if (NumUsrs)
{
/***** Initialize structure with user's data *****/
Usr_UsrDataConstructor (&FollowerUsrDat);
/***** Start listing *****/
Lay_StartRoundFrameTable ("560px",Txt_Followers,NULL,NULL,2);
for (NumUsr = 0;
NumUsr < NumUsrs;
NumUsr++)
{
/***** Get user and number of clicks *****/
row = mysql_fetch_row (mysql_res);
/* Get user's code (row[0]) */
FollowerUsrDat.UsrCod = Str_ConvertStrCodToLongCod (row[0]);
/***** Show user *****/
if ((NumUsr % Fol_NUM_COLUMNS_FOLLOW) == 0)
fprintf (Gbl.F.Out,"<tr>");
if (Usr_ChkUsrCodAndGetAllUsrDataFromUsrCod (&FollowerUsrDat))
Fol_ShowFollowedOrFollower (&FollowerUsrDat);
if ((NumUsr % Fol_NUM_COLUMNS_FOLLOW) == (Fol_NUM_COLUMNS_FOLLOW-1) ||
NumUsr == NumUsrs - 1)
fprintf (Gbl.F.Out,"</tr>");
}
/***** End listing *****/
Lay_EndRoundFrameTable ();
/***** Free memory used for user's data *****/
Usr_UsrDataDestructor (&FollowerUsrDat);
}
/***** Free structure that stores the query result *****/
DB_FreeMySQLResult (&mysql_res);
/***** If it's me, mark possible notification as seen *****/
if (UsrDat->UsrCod == Gbl.Usrs.Me.UsrDat.UsrCod)
Ntf_MarkNotifAsSeen (Ntf_EVENT_FOLLOWER,
-1L,-1L,
Gbl.Usrs.Me.UsrDat.UsrCod);
}
else
Lay_ShowAlert (Lay_WARNING,Txt_User_not_found_or_you_do_not_have_permission_);
}
/*****************************************************************************/
/************************* Show followed or follower *************************/
/*****************************************************************************/
static void Fol_ShowFollowedOrFollower (struct UsrData *UsrDat)
{
extern const char *Txt_View_public_profile;
extern const char *Txt_Following_unfollow;
extern const char *Txt_Unfollow;
extern const char *Txt_Follow;
bool ShowPhoto;
char PhotoURL[PATH_MAX + 1];
bool Visible = Pri_ShowingIsAllowed (UsrDat->ProfileVisibility,UsrDat);
/***** Show user's photo *****/
fprintf (Gbl.F.Out,"<td class=\"FOLLOW_USR_PHOTO\">");
if (Visible)
{
ShowPhoto = Pho_ShowingUsrPhotoIsAllowed (UsrDat,PhotoURL);
Pho_ShowUsrPhoto (UsrDat,ShowPhoto ? PhotoURL :
NULL,
"PHOTO60x80",Pho_ZOOM,false);
}
fprintf (Gbl.F.Out,"</td>");
/***** Show user's name and icon to follow/unfollow *****/
fprintf (Gbl.F.Out,"<td class=\"FOLLOW_USR_NAME\">");
if (Visible)
{
/* Put form to go to public profile */
Act_FormStart (ActSeePubPrf);
Usr_PutParamUsrCodEncrypted (UsrDat->EncryptedUsrCod);
Act_LinkFormSubmit (Txt_View_public_profile,"DAT",NULL);
Usr_RestrictLengthAndWriteName (UsrDat,10);
fprintf (Gbl.F.Out,"</a>");
Act_FormEnd ();
}
if (!Gbl.Usrs.Me.Logged || // Not logged
Gbl.Usrs.Me.UsrDat.UsrCod == UsrDat->UsrCod) // It's me
/* Inactive icon to follow/unfollow */
fprintf (Gbl.F.Out,"<div class=\"FOLLOW_USR_ICO ICO_HIDDEN\">"
"<img src=\"%s/usr64x64.gif\""
" alt=\"\""
" class=\"ICO25x25\" />"
"</div>",
Gbl.Prefs.IconsURL);
else
{
/* Put form to follow / unfollow */
if (Fol_CheckUsrIsFollowerOf (Gbl.Usrs.Me.UsrDat.UsrCod,UsrDat->UsrCod)) // I follow user
{
/* Form to unfollow */
Act_FormStart (ActUnfUsr);
Usr_PutParamUsrCodEncrypted (UsrDat->EncryptedUsrCod);
Act_LinkFormSubmit (Txt_Following_unfollow,NULL,NULL);
fprintf (Gbl.F.Out,"<div class=\"FOLLOW_USR_ICO ICO_HIGHLIGHT\">"
"<img src=\"%s/following64x64.png\""
" alt=\"%s\" title=\"%s\""
" class=\"ICO25x25\" />"
"</div>"
"</a>",
Gbl.Prefs.IconsURL,
Txt_Unfollow,Txt_Following_unfollow);
Act_FormEnd ();
}
else if (Visible) // I do not follow this user and I can follow
{
/* Form to follow */
Act_FormStart (ActFolUsr);
Usr_PutParamUsrCodEncrypted (UsrDat->EncryptedUsrCod);
Act_LinkFormSubmit (Txt_Follow,NULL,NULL);
fprintf (Gbl.F.Out,"<div class=\"FOLLOW_USR_ICO ICO_HIGHLIGHT\">"
"<img src=\"%s/follow64x64.png\""
" alt=\"%s\" title=\"%s\""
" class=\"ICO25x25\" />"
"</div>"
"</a>",
Gbl.Prefs.IconsURL,
Txt_Follow,Txt_Follow);
Act_FormEnd ();
}
}
fprintf (Gbl.F.Out,"</td>");
}
/*****************************************************************************/
/***************************** Follow another user ***************************/
/*****************************************************************************/
void Fol_FollowUsr (void)
{
extern const char *Txt_User_not_found_or_you_do_not_have_permission_;
char Query[256];
bool CreateNotif;
bool NotifyByEmail;
bool Error;
/***** Get user to be followed *****/
if (Usr_GetParamOtherUsrCodEncryptedAndGetUsrData ())
{
// Follow only if I can view his/her public profile
if (Pri_ShowingIsAllowed (Gbl.Usrs.Other.UsrDat.ProfileVisibility,&Gbl.Usrs.Other.UsrDat))
// Follow only if I do not follow him/her
if (!Fol_CheckUsrIsFollowerOf (Gbl.Usrs.Me.UsrDat.UsrCod,
Gbl.Usrs.Other.UsrDat.UsrCod))
{
/***** Follow user in database *****/
sprintf (Query,"REPLACE INTO usr_follow"
" (FollowerCod,FollowedCod,FollowTime)"
" VALUES ('%ld','%ld',NOW())",
Gbl.Usrs.Me.UsrDat.UsrCod,
Gbl.Usrs.Other.UsrDat.UsrCod);
DB_QueryREPLACE (Query,"can not follow user");
/***** This follow must be notified by email? *****/
CreateNotif = (Gbl.Usrs.Other.UsrDat.Prefs.NotifNtfEvents & (1 << Ntf_EVENT_FOLLOWER));
NotifyByEmail = CreateNotif &&
(Gbl.Usrs.Other.UsrDat.Prefs.EmailNtfEvents & (1 << Ntf_EVENT_FOLLOWER));
/***** Create notification for this followed.
If this followed wants to receive notifications by email, activate the sending of a notification *****/
if (CreateNotif)
Ntf_StoreNotifyEventToOneUser (Ntf_EVENT_FOLLOWER,&Gbl.Usrs.Other.UsrDat,Gbl.Usrs.Me.UsrDat.UsrCod,
(Ntf_Status_t) (NotifyByEmail ? Ntf_STATUS_BIT_EMAIL :
0));
}
/***** Show user's profile again *****/
Error = !Prf_ShowUserProfile (&Gbl.Usrs.Other.UsrDat);
}
else
Error = true;
if (Error)
Lay_ShowAlert (Lay_WARNING,Txt_User_not_found_or_you_do_not_have_permission_);
}
/*****************************************************************************/
/***************************** Unfollow another user *************************/
/*****************************************************************************/
void Fol_UnfollowUsr (void)
{
extern const char *Txt_User_not_found_or_you_do_not_have_permission_;
char Query[256];
/***** Get user to be unfollowed *****/
if (Usr_GetParamOtherUsrCodEncryptedAndGetUsrData ())
{
// Unfollow only if I follow him/her
if (Fol_CheckUsrIsFollowerOf (Gbl.Usrs.Me.UsrDat.UsrCod,
Gbl.Usrs.Other.UsrDat.UsrCod))
{
/***** Follow user in database *****/
sprintf (Query,"DELETE FROM usr_follow"
" WHERE FollowerCod='%ld' AND FollowedCod='%ld'",
Gbl.Usrs.Me.UsrDat.UsrCod,
Gbl.Usrs.Other.UsrDat.UsrCod);
DB_QueryREPLACE (Query,"can not unfollow user");
}
/***** Show user's profile again *****/
if (!Prf_ShowUserProfile (&Gbl.Usrs.Other.UsrDat)) // I can not view user's profile
/* 1) I followed a user when I had permission
2) User restricted permission, so now I can not view his/her profile
3) Now I can not view his/her profile ==> show users I follow */
Fol_ListFollowingUsr (&Gbl.Usrs.Me.UsrDat); // List users I follow
}
else
Lay_ShowAlert (Lay_WARNING,Txt_User_not_found_or_you_do_not_have_permission_);
}
/*****************************************************************************/
/****** Get and show ranking of users attending to number of followers *******/
/*****************************************************************************/
void Fol_GetAndShowRankingFollowers (void)
{
char Query[512];
/***** Get ranking from database *****/
switch (Gbl.Scope.Current)
{
case Sco_SCOPE_SYS:
sprintf (Query,"SELECT FollowedCod,COUNT(FollowerCod) AS N"
" FROM usr_follow"
" GROUP BY FollowedCod"
" ORDER BY N DESC,FollowedCod LIMIT 100");
break;
case Sco_SCOPE_CTY:
sprintf (Query,"SELECT usr_follow.FollowedCod,COUNT(DISTINCT usr_follow.FollowerCod) AS N"
" FROM institutions,centres,degrees,courses,crs_usr,usr_follow"
" WHERE institutions.CtyCod='%ld'"
" AND institutions.InsCod=centres.InsCod"
" AND centres.CtrCod=degrees.CtrCod"
" AND degrees.DegCod=courses.DegCod"
" AND courses.CrsCod=crs_usr.CrsCod"
" AND crs_usr.UsrCod=usr_follow.FollowedCod"
" GROUP BY usr_follow.FollowedCod"
" ORDER BY N DESC,usr_follow.FollowedCod LIMIT 100",
Gbl.CurrentCty.Cty.CtyCod);
break;
case Sco_SCOPE_INS:
sprintf (Query,"SELECT usr_follow.FollowedCod,COUNT(DISTINCT usr_follow.FollowerCod) AS N"
" FROM centres,degrees,courses,crs_usr,usr_follow"
" WHERE centres.InsCod='%ld'"
" AND centres.CtrCod=degrees.CtrCod"
" AND degrees.DegCod=courses.DegCod"
" AND courses.CrsCod=crs_usr.CrsCod"
" AND crs_usr.UsrCod=usr_follow.FollowedCod"
" GROUP BY usr_follow.FollowedCod"
" ORDER BY N DESC,usr_follow.FollowedCod LIMIT 100",
Gbl.CurrentIns.Ins.InsCod);
break;
case Sco_SCOPE_CTR:
sprintf (Query,"SELECT usr_follow.FollowedCod,COUNT(DISTINCT usr_follow.FollowerCod) AS N"
" FROM degrees,courses,crs_usr,usr_follow"
" WHERE degrees.CtrCod='%ld'"
" AND degrees.DegCod=courses.DegCod"
" AND courses.CrsCod=crs_usr.CrsCod"
" AND crs_usr.UsrCod=usr_follow.FollowedCod"
" GROUP BY usr_follow.FollowedCod"
" ORDER BY N DESC,usr_follow.FollowedCod LIMIT 100",
Gbl.CurrentCtr.Ctr.CtrCod);
break;
case Sco_SCOPE_DEG:
sprintf (Query,"SELECT usr_follow.FollowedCod,COUNT(DISTINCT usr_follow.FollowerCod) AS N"
" FROM courses,crs_usr,usr_follow"
" WHERE courses.DegCod='%ld'"
" AND courses.CrsCod=crs_usr.CrsCod"
" AND crs_usr.UsrCod=usr_follow.FollowedCod"
" GROUP BY usr_follow.FollowedCod"
" ORDER BY N DESC,usr_follow.FollowedCod LIMIT 100",
Gbl.CurrentDeg.Deg.DegCod);
break;
case Sco_SCOPE_CRS:
sprintf (Query,"SELECT usr_follow.FollowedCod,COUNT(DISTINCT usr_follow.FollowerCod) AS N"
" FROM crs_usr,usr_follow"
" WHERE crs_usr.CrsCod='%ld'"
" AND crs_usr.UsrCod=usr_follow.FollowedCod"
" GROUP BY usr_follow.FollowedCod"
" ORDER BY N DESC,usr_follow.FollowedCod LIMIT 100",
Gbl.CurrentCrs.Crs.CrsCod);
break;
default:
Lay_ShowErrorAndExit ("Wrong scope.");
break;
}
Prf_ShowRankingFigure (Query);
}
/*****************************************************************************/
/********************* Get notification of a new follower ********************/
/*****************************************************************************/
// This function may be called inside a web service, so don't report error
void Fol_GetNotifFollower (char SummaryStr[Cns_MAX_BYTES_TEXT + 1],
char **ContentStr)
{
SummaryStr[0] = '\0';
if ((*ContentStr = (char *) malloc (1)))
*ContentStr[0] = '\0';
}
/*****************************************************************************/
/*********************** Remove user from user follow ************************/
/*****************************************************************************/
void Fol_RemoveUsrFromUsrFollow (long UsrCod)
{
char Query[128];
sprintf (Query,"DELETE FROM usr_follow"
" WHERE FollowerCod='%ld' OR FollowedCod='%ld'",
UsrCod,UsrCod);
DB_QueryDELETE (Query,"can not remove user from followers and followed");
}
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