<?php
/* For licensing terms, see /license.txt */

/**
*    This class provides methods for the social network management.
*    Include/require it in your code to use its features.
*
*    @package chamilo.social
*/
/**
 * Code
 */

/**
 *
*    @package chamilo.social
 */
class SocialManager extends UserManager {

    public function __construct() {
    }

    /**
     * Allow to see contacts list
     * @author isaac flores paz
     * @return array
     */
    public static function show_list_type_friends () {
        $friend_relation_list=array();
        $count_list=0;
        $tbl_my_friend_relation_type = Database :: get_main_table(TABLE_MAIN_USER_FRIEND_RELATION_TYPE);
        $sql='SELECT id,title FROM '.$tbl_my_friend_relation_type.' WHERE id<>6 ORDER BY id ASC';
        $result=Database::query($sql);
        while ($row=Database::fetch_array($result,'ASSOC')) {
            $friend_relation_list[]=$row;
        }
        $count_list=count($friend_relation_list);
        if ($count_list==0) {
            $friend_relation_list[]=get_lang('Unknown');
        } else {
            return $friend_relation_list;
        }
    }

    /**
     * Get relation type contact by name
     * @param string names of the kind of relation
     * @return int
     * @author isaac flores paz
     */
    public static function get_relation_type_by_name ($relation_type_name) {
        $list_type_friend = self::show_list_type_friends();
        foreach ($list_type_friend as $value_type_friend) {
            if (strtolower($value_type_friend['title'])==$relation_type_name) {
                return $value_type_friend['id'];
            }
        }
    }

    /**
     * Get the kind of relation between contacts
     * @param int user id
     * @param int user friend id
     * @param string
     * @author isaac flores paz
     */
    public static function get_relation_between_contacts ($user_id,$user_friend) {
        $tbl_my_friend_relation_type = Database :: get_main_table(TABLE_MAIN_USER_FRIEND_RELATION_TYPE);
        $tbl_my_friend = Database :: get_main_table(TABLE_MAIN_USER_REL_USER);
        $sql= 'SELECT rt.id as id FROM '.$tbl_my_friend_relation_type.' rt ' .
              'WHERE rt.id=(SELECT uf.relation_type FROM '.$tbl_my_friend.' uf WHERE  user_id='.((int)$user_id).' AND friend_user_id='.((int)$user_friend).' AND uf.relation_type <> '.USER_RELATION_TYPE_RRHH.' )';
        $res=Database::query($sql);
        if (Database::num_rows($res)>0) {
            $row = Database::fetch_array($res,'ASSOC');
            return $row['id'];
        } else {
            return USER_UNKNOW;
        }
    }

    /**
     * Gets friends id list
     * @param int  user id
     * @param int group id
     * @param string name to search
     * @param bool true will load firstname, lastname, and image name
     * @return array
     * @author Julio Montoya <gugli100@gmail.com> Cleaning code, function renamed, $load_extra_info option added
     * @author isaac flores paz
     */
    public static function get_friends($user_id, $id_group = null, $search_name = null, $load_extra_info = true) {
        $list_ids_friends=array();
        $tbl_my_friend = Database :: get_main_table(TABLE_MAIN_USER_REL_USER);
        $tbl_my_user = Database :: get_main_table(TABLE_MAIN_USER);
        $sql='SELECT friend_user_id FROM '.$tbl_my_friend.' WHERE relation_type NOT IN ('.USER_RELATION_TYPE_DELETED.', '.USER_RELATION_TYPE_RRHH.') AND friend_user_id<>'.((int)$user_id).' AND user_id='.((int)$user_id);
        if (isset($id_group) && $id_group>0) {
            $sql.=' AND relation_type='.$id_group;
        }
        if (isset($search_name)) {
            $search_name = trim($search_name);
            $search_name = str_replace(' ', '', $search_name);
            $sql.=' AND friend_user_id IN (SELECT user_id FROM '.$tbl_my_user.' WHERE firstName LIKE "%'.Database::escape_string($search_name).'%" OR lastName LIKE "%'.Database::escape_string($search_name).'%"   OR    '.(api_is_western_name_order() ? 'concat(firstName, lastName)' : 'concat(lastName, firstName)').' like concat("%","'.Database::escape_string($search_name).'","%")    ) ';
        }

        $res = Database::query($sql);
        while ($row = Database::fetch_array($res, 'ASSOC')) {
            if ($load_extra_info) {
                $path = UserManager::get_user_picture_path_by_id($row['friend_user_id'],'web',false,true);
                $my_user_info = api_get_user_info($row['friend_user_id']);
                $list_ids_friends[] = array('friend_user_id'=>$row['friend_user_id'],'firstName'=>$my_user_info['firstName'] , 'lastName'=>$my_user_info['lastName'], 'username'=>$my_user_info['username'], 'image'=>$path['file']);
            } else {
                $list_ids_friends[] = $row;
            }
        }
        return $list_ids_friends;
    }


    /**
     * get list web path of contacts by user id
     * @param int user id
     * @param int group id
     * @param string name to search
     * @param array
     * @author isaac flores paz
     */
    public static function get_list_path_web_by_user_id ($user_id,$id_group=null,$search_name=null) {
        $combine_friend = array();
        $list_ids = self::get_friends($user_id,$id_group,$search_name);
        if (is_array($list_ids)) {
            foreach ($list_ids as $values_ids) {
                $list_path_image_friend[] = UserManager::get_user_picture_path_by_id($values_ids['friend_user_id'],'web',false,true);
                $combine_friend=array('id_friend'=>$list_ids,'path_friend'=>$list_path_image_friend);
            }
        }
        return $combine_friend;
    }

    /**
     * get web path of user invitate
     * @author isaac flores paz
     * @author Julio Montoya setting variable array
     * @param int user id
     * @return array
     */
    public static function get_list_web_path_user_invitation_by_user_id ($user_id) {
        $list_ids = self::get_list_invitation_of_friends_by_user_id((int)$user_id);
        $list_path_image_friend = array();
        foreach ($list_ids as $values_ids) {
            $list_path_image_friend[] = UserManager::get_user_picture_path_by_id($values_ids['user_sender_id'],'web',false,true);
        }
        return $list_path_image_friend;
    }

    /**
     * Sends an invitation to contacts
     * @param int user id
     * @param int user friend id
     * @param string title of the message
     * @param string content of the message
     * @return boolean
     * @author isaac flores paz
     * @author Julio Montoya <gugli100@gmail.com> Cleaning code
     */
    public static function send_invitation_friend($user_id, $friend_id, $message_title, $message_content) {
        $tbl_message = Database::get_main_table(TABLE_MAIN_MESSAGE);
        $user_id = intval($user_id);
        $friend_id = intval($friend_id);

        //Just in case we replace the and \n and \n\r while saving in the DB
        $message_content = str_replace(array("\n", "\n\r"), '<br />', $message_content);

        $clean_message_title   = Database::escape_string($message_title);
        $clean_message_content = Database::escape_string($message_content);

        $now = api_get_utc_datetime();

        $sql_exist='SELECT COUNT(*) AS count FROM '.$tbl_message.' WHERE user_sender_id='.$user_id.' AND user_receiver_id='.$friend_id.' AND msg_status IN(5,6,7);';

        $res_exist = Database::query($sql_exist);
        $row_exist = Database::fetch_array($res_exist,'ASSOC');

        if ($row_exist['count']==0) {

            $sql=' INSERT INTO '.$tbl_message.'(user_sender_id,user_receiver_id,msg_status,send_date,title,content)
                   VALUES('.$user_id.','.$friend_id.','.MESSAGE_STATUS_INVITATION_PENDING.',"'.$now.'","'.$clean_message_title.'","'.$clean_message_content.'") ';
            Database::query($sql);

            $sender_info = api_get_user_info($user_id);
            $notification = new Notification();
            $notification->save_notification(Notification::NOTIFICATION_TYPE_INVITATION, array($friend_id), $message_title, $message_content, $sender_info);

            return true;
        } else {
            //invitation already exist
            $sql_if_exist ='SELECT COUNT(*) AS count, id FROM '.$tbl_message.' WHERE user_sender_id='.$user_id.' AND user_receiver_id='.$friend_id.' AND msg_status = 7';
            $res_if_exist = Database::query($sql_if_exist);
            $row_if_exist = Database::fetch_array($res_if_exist,'ASSOC');
            if ($row_if_exist['count']==1) {
                $sql_if_exist_up='UPDATE '.$tbl_message.'SET msg_status=5, content = "'.$clean_message_content.'"  WHERE user_sender_id='.$user_id.' AND user_receiver_id='.$friend_id.' AND msg_status = 7 ';
                Database::query($sql_if_exist_up);
                return true;
            } else {
                return false;
            }
        }
    }
    /**
     * Get number messages of the inbox
     * @author isaac flores paz
     * @param int user receiver id
     * @return int
     */
    public static function get_message_number_invitation_by_user_id ($user_receiver_id) {
        $tbl_message=Database::get_main_table(TABLE_MAIN_MESSAGE);
        $sql='SELECT COUNT(*) as count_message_in_box FROM '.$tbl_message.' WHERE user_receiver_id='.intval($user_receiver_id).' AND msg_status='.MESSAGE_STATUS_INVITATION_PENDING;
        $res=Database::query($sql);
        $row=Database::fetch_array($res,'ASSOC');
        return $row['count_message_in_box'];
    }

    /**
     * Get invitation list received by user
     * @author isaac flores paz
     * @param int user id
     * @return array()
     */
    public static function get_list_invitation_of_friends_by_user_id ($user_id) {
        $list_friend_invitation=array();
        $tbl_message = Database::get_main_table(TABLE_MAIN_MESSAGE);
        $sql = 'SELECT user_sender_id,send_date,title,content FROM '.$tbl_message.' WHERE user_receiver_id='.intval($user_id).' AND msg_status = '.MESSAGE_STATUS_INVITATION_PENDING;
        $res = Database::query($sql);
        while ($row = Database::fetch_array($res,'ASSOC')) {
            $list_friend_invitation[]=$row;
        }
        return $list_friend_invitation;
    }

    /**
     * Get invitation list sent by user
     * @author Julio Montoya <gugli100@gmail.com>
     * @param int user id
     * @return array()
     */

    public static function get_list_invitation_sent_by_user_id ($user_id) {
        $list_friend_invitation=array();
        $tbl_message=Database::get_main_table(TABLE_MAIN_MESSAGE);
        $sql='SELECT user_receiver_id, send_date,title,content FROM '.$tbl_message.' WHERE user_sender_id = '.intval($user_id).' AND msg_status = '.MESSAGE_STATUS_INVITATION_PENDING;
        $res=Database::query($sql);
        while ($row=Database::fetch_array($res,'ASSOC')) {
            $list_friend_invitation[$row['user_receiver_id']]=$row;
        }
        return $list_friend_invitation;
    }

    /**
     * Accepts invitation
     * @param int user sender id
     * @param int user receiver id
     * @author isaac flores paz
     * @author Julio Montoya <gugli100@gmail.com> Cleaning code
     */
    public static function invitation_accepted ($user_send_id,$user_receiver_id) {
        $tbl_message=Database::get_main_table(TABLE_MAIN_MESSAGE);
        $sql='UPDATE '.$tbl_message.' SET msg_status='.MESSAGE_STATUS_INVITATION_ACCEPTED.' WHERE user_sender_id='.((int)$user_send_id).' AND user_receiver_id='.((int)$user_receiver_id).';';
        Database::query($sql);
    }
    /**
     * Denies invitation
     * @param int user sender id
     * @param int user receiver id
     * @author isaac flores paz
     * @author Julio Montoya <gugli100@gmail.com> Cleaning code
     */
    public static function invitation_denied ($user_send_id,$user_receiver_id) {
        $tbl_message=Database::get_main_table(TABLE_MAIN_MESSAGE);
        //$msg_status=7;
        //$sql='UPDATE '.$tbl_message.' SET msg_status='.$msg_status.' WHERE user_sender_id='.((int)$user_send_id).' AND user_receiver_id='.((int)$user_receiver_id).';';
        $sql='DELETE FROM '.$tbl_message.' WHERE user_sender_id='.((int)$user_send_id).' AND user_receiver_id='.((int)$user_receiver_id).';';
        Database::query($sql);
    }
    /**
     * allow attach to group
     * @author isaac flores paz
     * @param int user to qualify
     * @param int kind of rating
     * @return void()
     */
    public static function qualify_friend ($id_friend_qualify,$type_qualify) {
        $tbl_user_friend=Database::get_main_table(TABLE_MAIN_USER_REL_USER);
        $user_id=api_get_user_id();
        $sql='UPDATE '.$tbl_user_friend.' SET relation_type='.((int)$type_qualify).' WHERE user_id='.((int)$user_id).' AND friend_user_id='.((int)$id_friend_qualify).';';
        Database::query($sql);
    }
    /**
     * Sends invitations to friends
     * @author Isaac Flores Paz <isaac.flores.paz@gmail.com>
     * @author Julio Montoya <gugli100@gmail.com> Cleaning code
     * @param void
     * @return string message invitation
     */
    public static function send_invitation_friend_user($userfriend_id, $subject_message = '', $content_message = '') {
        global $charset;

        $user_info = array();
        $user_info = api_get_user_info($userfriend_id);
        $succes = get_lang('MessageSentTo');
        $succes.= ' : '.api_get_person_name($user_info['firstName'], $user_info['lastName']);

        if (isset($subject_message) && isset($content_message) && isset($userfriend_id)) {
            $send_message = MessageManager::send_message($userfriend_id, $subject_message, $content_message);

            if ($send_message) {
                echo Display::display_confirmation_message($succes,true);
            } else {
                echo Display::display_error_message(get_lang('ErrorSendingMessage'),true);
            }
            return false;
        } elseif (isset($userfriend_id) && !isset($subject_message)) {
            $count_is_true = false;
            if (isset($userfriend_id) && $userfriend_id>0) {
                $message_title = get_lang('Invitation');
                $count_is_true = self::send_invitation_friend(api_get_user_id(), $userfriend_id, $message_title, $content_message);

                if ($count_is_true) {
                    echo Display::display_confirmation_message(api_htmlentities(get_lang('InvitationHasBeenSent'), ENT_QUOTES,$charset),false);
                } else {
                    echo Display::display_warning_message(api_htmlentities(get_lang('YouAlreadySentAnInvitation'), ENT_QUOTES,$charset),false);
                }
            }
        }
    }

    /**
     * Get user's feeds
     * @param   int User ID
     * @param   int Limit of posts per feed
     * @return  string  HTML section with all feeds included
     * @author  Yannick Warnier
     * @since   Dokeos 1.8.6.1
     */
    public static function get_user_feeds($user, $limit = 5)
    {
        if (!function_exists('fetch_rss')) {
            return '';
        }
        $feeds = array();
        $feed = UserManager::get_extra_user_data_by_field($user,'rssfeeds');
        if (empty($feed)) {
            return '';
        }
        $feeds = explode(';',$feed['rssfeeds']);
        if (count($feeds) == 0) {
            return '';
        }
        $res = '';
        foreach ($feeds as $url) {
            if (empty($url)) {
                continue;
            }
            $rss = @fetch_rss($url);
            $i = 1;
            if (!empty($rss->items)) {
                $icon_rss = '';
                if (!empty($feed)) {
                    $icon_rss = Display::url(Display::return_icon('rss.png', '', array(), 32), Security::remove_XSS($feed['rssfeeds']), array('target'=>'_blank'));
                }
                $res .= '<h2>'.$rss->channel['title'].''.$icon_rss.'</h2>';
                $res .= '<div class="social-rss-channel-items">';
                foreach ($rss->items as $item) {
                    if ($limit >= 0 and $i > $limit) {
                        break;
                    }
                    $res .= '<h3><a href="'.$item['link'].'">'.$item['title'].'</a></h3>';
                    $res .= '<div class="social-rss-item-date">'.api_get_datetime($item['date_timestamp']).'</div>';
                    $res .= '<div class="social-rss-item-content">'.$item['description'].'</div><br />';
                    $i++;
                }
                $res .= '</div>';
            }
        }
        return $res;
    }

    /**
     * Helper functions definition
     */
    public static function get_logged_user_course_html($my_course, $count) {
        //initialise
        $result = '';

        $course_code   = $my_course['code'];
        $course_title  = $my_course['course_info']['title'];
        $course_id     = $my_course['course_info']['real_id'];

        $course_access_settings = CourseManager :: get_access_settings($course_code);

        $course_visibility = $course_access_settings['visibility'];

        $user_in_course_status = CourseManager :: get_user_in_course_status(api_get_user_id(), $course_code);

        $s_htlm_status_icon = Display::return_icon('course.gif', get_lang('Course'));

        //display course entry
        $result .= '<div id="div_'.$count.'">';
        $result .= '<h3><img src="../img/nolines_plus.gif" id="btn_'.$count.'" onclick="toogle_course(this,\''.$course_id.'\' )">';
        $result .= $s_htlm_status_icon;

        //show a hyperlink to the course, unless the course is closed and user is not course admin
        if ($course_visibility != COURSE_VISIBILITY_HIDDEN && ($course_visibility != COURSE_VISIBILITY_CLOSED || $user_in_course_status == COURSEMANAGER)) {
            $result .= '<a href="javascript:void(0)" id="ln_'.$count.'"  onclick=toogle_course(this,\''.$course_id.'\');>&nbsp;'.$course_title.'</a>';
        } else {
            $result .= $course_title." "." ".get_lang('CourseClosed')."";
        }
        $result .= '</h3>';

        $result .= '</li>';
        $result .= '</div>';
        return $result;
    }

    /**
     * Shows the right menu of the Social Network tool
     *
     * @param string highlight link possible values: group_add, home, messages, messages_inbox, messages_compose ,messages_outbox ,invitations, shared_profile, friends, groups search
     * @param int group id
     * @param int user id
     * @param bool show profile or not (show or hide the user image/information)
     *
     */
    public static function show_social_menu($show = '', $group_id = 0, $user_id = 0, $show_full_profile = false, $show_delete_account_button = false)
    {
        if (empty($user_id)) {
            $user_id = api_get_user_id();
        }
        $usergroup = new UserGroup();
        $user_info = api_get_user_info($user_id, true);

        $current_user_id = api_get_user_id();
        $current_user_info = api_get_user_info($current_user_id, true);

        if ($current_user_id == $user_id) {
            $user_friend_relation = null;
        } else {
            $user_friend_relation = SocialManager::get_relation_between_contacts($current_user_id, $user_id);
        }

        $show_groups = array('groups', 'group_messages', 'messages_list', 'group_add', 'mygroups', 'group_edit', 'member_list', 'invite_friends', 'waiting_list', 'browse_groups');

        // get count unread message and total invitations
        $count_unread_message = MessageManager::get_number_of_messages(true);
        $count_unread_message = (!empty($count_unread_message)? Display::badge($count_unread_message) :'');

        $number_of_new_messages_of_friend    = SocialManager::get_message_number_invitation_by_user_id(api_get_user_id());
        $group_pending_invitations = $usergroup->get_groups_by_user(api_get_user_id(), GROUP_USER_PERMISSION_PENDING_INVITATION, false);
        $group_pending_invitations = count($group_pending_invitations);
        $total_invitations = $number_of_new_messages_of_friend + $group_pending_invitations;
        $total_invitations = (!empty($total_invitations) ? Display::badge($total_invitations) :'');

        $html = '<div class="social-menu">';
        if (in_array($show, $show_groups) && !empty($group_id)) {
            //--- Group image
            $group_info = $usergroup->get($group_id);
            $big        = $usergroup->get_picture_group($group_id, $group_info['picture'],160,GROUP_IMAGE_SIZE_BIG);

            $html .= '<div class="social-content-image">';
            $html .= '<div class="well social-background-content">';
            $html .= Display::url('<img src='.$big['file'].' class="social-groups-image" /> </a><br /><br />', api_get_path(WEB_PATH).'main/social/groups.php?id='.$group_id);
            if ($usergroup->is_group_admin($group_id, api_get_user_id())) {
                $html .= '<div id="edit_image" class="hidden_message" style="display:none"><a href="'.api_get_path(WEB_PATH).'main/social/group_edit.php?id='.$group_id.'">'.get_lang('EditGroup').'</a></div>';
            }
            $html .= '</div>';
            $html .= '</div>';
        } else {
            $img_array = UserManager::get_user_picture_path_by_id($user_id,'web',true,true);
            $big_image = UserManager::get_picture_user($user_id, $img_array['file'],'', USER_IMAGE_SIZE_BIG);
            $big_image = $big_image['file'];
            $normal_image = $img_array['dir'].$img_array['file'];

            //--- User image

            $html .= '<div class="well social-background-content">';
            if ($img_array['file'] != 'unknown.jpg') {
                $html .= '<a class="thumbnail ajax" href="'.$big_image.'"><img src='.$normal_image.' /> </a>';
            } else {
                $html .= '<img src='.$normal_image.' width="110px" />';
            }
            if (api_get_user_id() == $user_id) {
                $html .= '<div id="edit_image" class="hidden_message" style="display:none">';
                $html .= '<a href="'.api_get_path(WEB_PATH).'main/auth/profile.php">'.get_lang('EditProfile').'</a></div>';
            }
            $html .= '</div>';
        }

        if (!in_array($show, array('shared_profile', 'groups', 'group_edit', 'member_list','waiting_list','invite_friends'))) {

            $html .= '<div class="well sidebar-nav"><ul class="nav nav-list">';

            $active = $show=='home' ? 'active' : null;
            $html .= '<li class="'.$active.'"><a href="'.api_get_path(WEB_PATH).'main/social/home.php">'.Display::return_icon('home.png',get_lang('Home'),array()).get_lang('Home').'</a></li>';

            if (api_get_setting('allow_message_tool') == 'true') {
                $active = $show=='messages' ? 'active' : null;
                $html .= '<li class="'.$active.'"><a href="'.api_get_path(WEB_PATH).'main/messages/inbox.php?f=social">'.Display::return_icon('instant_message.png',get_lang('Messages'),array()).get_lang('Messages').$count_unread_message.'</a></li>';
            }

            // Invitations
            if (api_get_setting('allow_message_tool') == 'true') {
                $active = $show=='invitations' ? 'active' : null;
                $html .= '<li class="'.$active.'"><a href="'.api_get_path(WEB_PATH).'main/social/invitations.php">'.Display::return_icon('invitation.png',get_lang('Invitations'),array()).get_lang('Invitations').$total_invitations.'</a></li>';
            }

            //Shared profile and groups
            $active = $show=='shared_profile' ? 'active' : null;
            $html .= '<li class="'.$active.'"><a href="'.api_get_path(WEB_PATH).'main/social/profile.php">'.Display::return_icon('my_shared_profile.png',get_lang('ViewMySharedProfile'),array()).get_lang('ViewMySharedProfile').'</a></li>';
            $active = $show=='friends' ? 'active' : null;
            $html .= '<li class="'.$active.'"><a href="'.api_get_path(WEB_PATH).'main/social/friends.php">'.Display::return_icon('friend.png',get_lang('Friends'),array()).get_lang('Friends').'</a></li>';
            $active = $show=='browse_groups' ? 'active' : null;
            $html .= '<li class="'.$active.'"><a href="'.api_get_path(WEB_PATH).'main/social/groups.php">'.Display::return_icon('group_s.png',get_lang('SocialGroups'),array()).get_lang('SocialGroups').'</a></li>';

            //Search users
            $active = $show=='search' ? 'active' : null;
            $html .= '<li class="'.$active.'"><a href="'.api_get_path(WEB_PATH).'main/social/search.php">'.Display::return_icon('zoom.png',get_lang('Search'), array()).get_lang('Search').'</a></li>';

            //My files
            $active = $show=='myfiles' ? 'active' : null;
            $html .= '<li class="'.$active.'"><a href="'.api_get_path(WEB_PATH).'main/social/myfiles.php">'.Display::return_icon('briefcase.png',get_lang('MyFiles'),array(), 16).get_lang('MyFiles').'</span></a></li>';
            $html .='</ul>
                  </div>';
        }

        if (in_array($show, $show_groups) && !empty($group_id)) {
            $html .= $usergroup->show_group_column_information($group_id, api_get_user_id(), $show);
        }

        if ($show == 'shared_profile') {
            //echo '<div align="center" class="social-menu-title" ><span class="social-menu-text1">'.get_lang('Menu').'</span></div>';
            $html .= '<div class="well sidebar-nav">
                    <ul class="nav nav-list">';

              // My own profile
            if ($show_full_profile && $user_id == intval(api_get_user_id())) {
                $html .= '<li><a href="'.api_get_path(WEB_PATH).'main/social/home.php">'.Display::return_icon('home.png',get_lang('Home'),array()).get_lang('Home').'</a></li>';

                if (api_get_setting('allow_message_tool') == 'true') {
                    $html .= '<li><a href="'.api_get_path(WEB_PATH).'main/messages/inbox.php?f=social">'.Display::return_icon('instant_message.png', get_lang('Messages'),array()).get_lang('Messages').$count_unread_message.'</a></li>';
                    $active = $show=='invitations' ? 'active' : null;
                    $html .= '<li class="'.$active.'"><a href="'.api_get_path(WEB_PATH).'main/social/invitations.php">'.Display::return_icon('invitation.png',get_lang('Invitations'),array()).get_lang('Invitations').$total_invitations.'</a></li>';
                }

                $html .= '<li class="active"><a href="'.api_get_path(WEB_PATH).'main/social/profile.php">'.Display::return_icon('my_shared_profile.png', get_lang('ViewMySharedProfile'), array('style'=>'float:left')).''.get_lang('ViewMySharedProfile').'</a></li>
                          <li><a href="'.api_get_path(WEB_PATH).'main/social/friends.php">'.Display::return_icon('friend.png',get_lang('Friends'),array()).get_lang('Friends').'</a></li>
                          <li><a href="'.api_get_path(WEB_PATH).'main/social/groups.php">'.Display::return_icon('group_s.png', get_lang('SocialGroups'),array()).get_lang('SocialGroups').'</a></li>';
                $active = $show=='search' ? 'active' : null;
                $html .= '<li class="'.$active.'"><a href="'.api_get_path(WEB_PATH).'main/social/search.php">'.Display::return_icon('zoom.png',get_lang('Search'),array()).get_lang('Search').'</a></li>';
                $active = $show=='myfiles' ? 'active' : null;
                $html .= '<li class="'.$active.'"><a href="'.api_get_path(WEB_PATH).'main/social/myfiles.php">'.Display::return_icon('briefcase.png',get_lang('MyFiles'),array(),16).get_lang('MyFiles').'</a></li>';
            }

            // My friend profile

            if (api_get_setting('allow_message_tool') == 'true') {

                if ($user_id != api_get_user_id()) {
                    $html .=  '<li><a href="javascript:void(0);" onclick="javascript:send_message_to_user(\''.$user_id.'\');" title="'.get_lang('SendMessage').'">';
                    $html .=  Display::return_icon('compose_message.png',get_lang('SendMessage')).'&nbsp;&nbsp;'.get_lang('SendMessage').'</a></li>';
                }

                //check if I already sent an invitation message
                $invitation_sent_list = SocialManager::get_list_invitation_sent_by_user_id(api_get_user_id());

                if (isset($invitation_sent_list[$user_id]) && is_array($invitation_sent_list[$user_id]) && count($invitation_sent_list[$user_id]) > 0 ) {
                    $html .= '<li><a href="'.api_get_path(WEB_PATH).'main/social/invitations.php">'.Display::return_icon('invitation.png',get_lang('YouAlreadySentAnInvitation')).'&nbsp;&nbsp;'.get_lang('YouAlreadySentAnInvitation').'</a></li>';
                } else {
                    if (!$show_full_profile) {
                        $html .=  '<li><a  href="javascript:void(0);" onclick="javascript:send_invitation_to_user(\''.$user_id.'\');" title="'.get_lang('SendInvitation').'">'.Display :: return_icon('invitation.png', get_lang('SocialInvitationToFriends')).'&nbsp;'.get_lang('SendInvitation').'</a></li>';
                    }
                }
            }

            //@todo check if user is online and if it's a friend to show the chat link
            if (api_is_global_chat_enabled()) {
                $user_name = $user_info['complete_name'];

                if ($user_friend_relation == USER_RELATION_TYPE_FRIEND) {
                if ($user_id != api_get_user_id()) {
                    //Only show chat if I'm available to talk
                    if ($current_user_info['user_is_online_in_chat'] == 1) {

                        $options = array('onclick' => "javascript:chatWith('".$user_id."', '".Security::remove_XSS($user_name)."', '".$user_info['user_is_online_in_chat']."')");
                        $chat_icon = $user_info['user_is_online_in_chat'] ? Display::return_icon('online.png', get_lang('Online')) : Display::return_icon('offline.png', get_lang('Offline'));
                        $html .=   Display::tag('li', Display::url($chat_icon.'&nbsp;&nbsp;'.get_lang('Chat'),  'javascript:void(0);', $options));
                        }
                    }
                    } else {
                       // Do something?
                    if ($user_id != api_get_user_id()) {
                        if ($current_user_info['user_is_online_in_chat'] == 1) {
                            $message = Security::remove_XSS(sprintf(get_lang("YouHaveToAddXAsAFriendFirst"), $user_name));
                            $options = array('onclick' => "javascript:chatNotYetWith('".$message."')");
                            $chat_icon = $user_info['user_is_online_in_chat'] ? Display::return_icon('online.png', get_lang('Online')) : Display::return_icon('offline.png', get_lang('Offline'));
                            $html .= Display::tag('li', Display::url($chat_icon.'&nbsp;&nbsp;'.get_lang('Chat'), 'javascript:void(0);', $options));
                        }
                    }
                }
            }
            $html .= '</ul></div>';

            if ($show_full_profile && $user_id == intval(api_get_user_id())) {
                $personal_course_list = UserManager::get_personal_session_course_list($user_id);
                $course_list_code = array();
                $i=1;
                if (is_array($personal_course_list)) {
                    foreach ($personal_course_list as $my_course) {
                        if ($i<=10) {
                            $course_list_code[] = array('code' => $my_course['code']);
                        } else {
                            break;
                        }
                        $i++;
                    }
                    //to avoid repeted courses
                    $course_list_code = ArrayClass::array_unique_dimensional($course_list_code);
                }

                //-----Announcements
                $my_announcement_by_user_id= intval($user_id);
                $announcements = array();
                foreach ($course_list_code as $course) {
                    $course_info = api_get_course_info($course['code']);
                    if (!empty($course_info)) {
                        $content = AnnouncementManager::get_all_annoucement_by_user_course($course_info['code'], $my_announcement_by_user_id);

                          if (!empty($content)) {
                            $url = Display::url(Display::return_icon('announcement.png',get_lang('Announcements')).$course_info['name'].' ('.$content['count'].')', api_get_path(WEB_CODE_PATH).'announcements/announcements.php?cidReq='.$course['code']);
                            $announcements[] = Display::tag('li', $url);
                          }
                    }
                  }
                  if (!empty($announcements)) {
                    //echo '<div align="center" class="social-menu-title" ><span class="social-menu-text1">'.get_lang('ToolAnnouncement').'</span></div>';
                    $html .= '<div class="social_menu_items">';
                    $html .= '<ul>';
                        foreach ($announcements as $announcement) {
                            $html .= $announcement;
                        }
                    $html .= '</ul>';
                    $html .= '</div>';
                  }
            }
        }

        if ($show_delete_account_button) {
            $html .= '<div class="sidebar-nav"><ul><li>';
            $url = api_get_path(WEB_CODE_PATH).'auth/unsubscribe_account.php';
            $html .= Display::url(Display::return_icon('delete.png',get_lang('Unsubscribe'), array(), ICON_SIZE_TINY).get_lang('Unsubscribe'), $url);
            $html .= '</li></ul></div>';
        }
        $html .= '</div>';


        return $html;
    }

    /**
     * Displays a sortable table with the list of online users.
     * @param array $user_list
     */
    public static function display_user_list($user_list) {
        if (!isset($_GET['id'])) {

            $html = null;

            $column_size = '9';
            $add_row = false;
            if (api_is_anonymous()) {
                $column_size = '12';
                $add_row = true;
            }

            $extra_params = array();
            $course_url = '';

            if (isset($_GET['cidReq']) && !empty($_GET['cidReq'])) {
                $extra_params['cidReq'] = Security::remove_XSS($_GET['cidReq']);
                $course_url = '&amp;cidReq='.Security::remove_XSS($_GET['cidReq']);
            }

            if ($add_row) {
                $html .='<div class="row">';
            }

            $html .= '<div class="span'.$column_size.'">';

            $html .= '<ul id="online_grid_container" class="thumbnails">';
            foreach ($user_list as $uid) {
                $user_info = api_get_user_info($uid);
                //Anonymous users can't have access to the profile
                if (!api_is_anonymous()) {
                    if (api_get_setting('allow_social_tool')=='true') {
                        $url = api_get_path(WEB_PATH).'main/social/profile.php?u='.$uid.$course_url;
                    } else {
                        $url = '?id='.$uid.$course_url;
                    }
                } else {
                    $url = '#';
                }
                $image_array = UserManager::get_user_picture_path_by_id($uid, 'system', false, true);

                // reduce image
                $name = $user_info['complete_name'];
                $status_icon = Display::span('', array('class' => 'online_user_in_text'));
                $user_status = $user_info['status'] == 1 ? Display::span('', array('class' => 'teacher_online')) : Display::span('', array('class' => 'student_online'));

                if ($image_array['file'] == 'unknown.jpg' || !file_exists($image_array['dir'].$image_array['file'])) {
                    $friends_profile['file'] = api_get_path(WEB_CODE_PATH).'img/unknown_180_100.jpg';
                    $img = '<img title = "'.$name.'" alt="'.$name.'" src="'.$friends_profile['file'].'">';
                } else {
                    $friends_profile = UserManager::get_picture_user($uid, $image_array['file'], 80, USER_IMAGE_SIZE_ORIGINAL);
                    $img = '<img title = "'.$name.'" alt="'.$name.'" src="'.$friends_profile['file'].'">';
                }
                $name = '<a href="'.$url.'">'.$status_icon.$user_status.$name.'</a><br>';
                $html .= '<li class="span'.($column_size/3).'"><div class="thumbnail">'.$img.'<div class="caption">'.$name.'</div</div></li>';
            }
            $counter = $_SESSION['who_is_online_counter'];

            $html .= '</ul></div>';
            if (count($user_list) >= 9) {
                $html .= '<div class="span'.$column_size.'"><a class="btn btn-large" id="link_load_more_items" data_link="'.$counter.'" >'.get_lang('More').'</a></div>';
            }
            if ($add_row) {
                $html .= '</div>';
            }
        }
        return $html;
    }

    /**
     * Displays the information of an individual user
     * @param int $user_id
     */
    public static function display_individual_user($user_id, $returnContent = false) {
        global $interbreadcrumb;
        $safe_user_id = intval($user_id);
        $curretUserId = api_get_user_id();

        $user_table = Database::get_main_table(TABLE_MAIN_USER);
        $sql = "SELECT * FROM $user_table WHERE user_id = ".$safe_user_id;
        $result = Database::query($sql);

        $userInfo = api_get_user_info($user_id);
        $content = null;

        if (Database::num_rows($result) == 1) {
            $user_object = Database::fetch_object($result);
            $alt  = $userInfo['complete_name'].($curretUserId == $user_id ? '&nbsp;('.get_lang('Me').')' : '');

            $status = api_get_status_from_code($user_object->status);

            $interbreadcrumb[] = array('url' => SocialManager::getUserOnlineLink(), 'name' => get_lang('UsersOnLineList'));

            if ($returnContent == false) {
                Display::display_header($alt, null, $alt);
            }

            $content = '<div class ="thumbnail">';
            if (strlen(trim($user_object->picture_uri)) > 0) {
                $sysdir_array = UserManager::get_user_picture_path_by_id($safe_user_id, 'system');
                $sysdir = $sysdir_array['dir'];
                $webdir_array = UserManager::get_user_picture_path_by_id($safe_user_id, 'web');
                $webdir = $webdir_array['dir'];
                $fullurl = $webdir.$user_object->picture_uri;
                $system_image_path = $sysdir.$user_object->picture_uri;
                list($width, $height, $type, $attr) = @getimagesize($system_image_path);
                $height += 30;
                $width += 30;
                // get the path,width and height from original picture
                $big_image = $webdir.'big_'.$user_object->picture_uri;
                $big_image_size = api_getimagesize($big_image);
                $big_image_width = $big_image_size['width'];
                $big_image_height = $big_image_size['height'];
                $url_big_image = $big_image.'?rnd='.time();
                //echo '<a href="javascript:void()" onclick="javascript: return show_image(\''.$url_big_image.'\',\''.$big_image_width.'\',\''.$big_image_height.'\');" >';
                $content .= '<img src="'.$fullurl.'" alt="'.$alt.'" />';
            } else {
                $content .= Display::return_icon('unknown.jpg', get_lang('Unknown'));
            }

            if (!empty($status)) {
                $content .= '<div class="caption">'.$status.'</div>';
            }
            $content .= '</div>';

            if (api_get_setting('show_email_addresses') == 'true') {
                $content .= Display::encrypted_mailto_link($user_object->email,$user_object->email).'<br />';
            }

            if ($user_object->competences) {
                $content .= Display::page_subheader(get_lang('MyCompetences'));
                $content .= '<p>'.$user_object->competences.'</p>';
            }
            if ($user_object->diplomas) {
                $content .= Display::page_subheader(get_lang('MyDiplomas'));
                $content .= '<p>'.$user_object->diplomas.'</p>';
            }
            if ($user_object->teach) {
                $content .= Display::page_subheader(get_lang('MyTeach'));
                $content .= '<p>'.$user_object->teach.'</p>';
            }

            $content .= SocialManager::display_productions($user_object->user_id);

            if ($user_object->openarea) {
                $content .= Display::page_subheader(get_lang('MyPersonalOpenArea'));
                $content .= '<p>'.$user_object->openarea.'</p>';
            }

        } else    {
            if ($returnContent == false) {
                Display::display_header(get_lang('UsersOnLineList'));
            }
            $content .= '<div class="actions-title">';
            $content .= get_lang('UsersOnLineList');
            $content .= '</div>';
        }

        if ($returnContent) {
            return $content;
        } else {
            echo $content;
        }

    }

    /**
     * Display productions in whoisonline
     * @param int $user_id User id
     */
    public static function display_productions($user_id, $returnContent = false) {
        $sysdir_array = UserManager::get_user_picture_path_by_id($user_id, 'system', true);
        $sysdir = $sysdir_array['dir'].$user_id.'/';
        $webdir_array = UserManager::get_user_picture_path_by_id($user_id, 'web', true);
        $webdir = $webdir_array['dir'].$user_id.'/';
        if (!is_dir($sysdir)) {
            mkdir($sysdir, api_get_permissions_for_new_directories(), true);
        }
        /*
        $handle = opendir($sysdir);
        $productions = array();
        while ($file = readdir($handle)) {
            if ($file == '.' || $file == '..' || $file == '.htaccess') {
                continue;                        // Skip current and parent directories
            }
            if (preg_match('/('.$user_id.'|[0-9a-f]{13}|saved)_.+\.(png|jpg|jpeg|gif)$/i', $file)) {
                // User's photos should not be listed as productions.
                continue;
            }
            $productions[] = $file;
        }
        */
        $content = null;
        $productions = UserManager::get_user_productions($user_id);

        if (count($productions) > 0) {
            $content .= '<dt><strong>'.get_lang('Productions').'</strong></dt>';
            $content .='<dd><ul>';
            foreach ($productions as $file) {
                // Only display direct file links to avoid browsing an empty directory
                if (is_file($sysdir.$file) && $file != $webdir_array['file']) {
                    $content .= '<li><a href="'.$webdir.urlencode($file).'" target=_blank>'.$file.'</a></li>';
                }
                // Real productions are under a subdirectory by the User's id
                if (is_dir($sysdir.$file)) {
                    $subs = scandir($sysdir.$file);
                    foreach ($subs as $my => $sub) {
                        if (substr($sub, 0, 1) != '.' && is_file($sysdir.$file.'/'.$sub)) {
                            $content .= '<li><a href="'.$webdir.urlencode($file).'/'.urlencode($sub).'" target=_blank>'.$sub.'</a></li>';
                        }
                    }
                }
            }
            $content .= '</ul></dd>';
        }
        if ($returnContent) {
            return $content;
        } else {
            echo $content;
        }
    }

    public static function social_wrapper_div($content, $span_count) {
        $span_count = intval($span_count);
        $html = '<div class="span'.$span_count.'">';
        $html .= '<div class="well_border">';
        $html .= $content;
        $html .= '</div></div>';
        return $html;

    }

    /**
     * Dummy function
     *
     */
    public static function get_plugins($place = SOCIAL_CENTER_PLUGIN) {
        $content = '';
        switch ($place) {
            case SOCIAL_CENTER_PLUGIN:
                $social_plugins = array(1, 2);
                if (is_array($social_plugins) && count($social_plugins)>0) {
                    $content.= '<div id="social-plugins">';
                    foreach($social_plugins as $plugin ) {
                        $content.=  '<div class="social-plugin-item">';
                        $content.=  $plugin;
                        $content.=  '</div>';
                    }
                    $content.=  '</div>';
                }
            break;
            case SOCIAL_LEFT_PLUGIN:
            break;
            case SOCIAL_RIGHT_PLUGIN:
            break;
        }
        return $content;
    }

    /**
     *
     * @param $courseCode
     * @param null $sessionId
     * @return string
     */
    static function getUserOnlineLink($courseCode = null, $sessionId = null)
    {
        if (empty($courseCode) && empty($sessionId)) {
            return api_get_path(WEB_PATH).'whoisonline.php';
            //return api_get_path(WEB_PUBLIC_PATH).'users/online';
        }

        if (!empty($courseCode)) {
            return api_get_path(WEB_PATH).'whoisonline.php?cidReq='.$courseCode;
            //return api_get_path(WEB_PUBLIC_PATH).'users/online/course/'.$courseCode;
        }

        if (!empty($sessionId)) {
            return api_get_path(WEB_PATH).'whoisonlinesession.php?session_id='.$sessionId;
            //return api_get_path(WEB_PUBLIC_PATH).'users/online/session/'.$sessionId;
        }
    }
}