Adding ICS file on calendar reminder

objects/ICS.php

@@ -0,0 +1,170 @@
+<?php
+
+/**
+ * This is free and unencumbered software released into the public domain.
+ * 
+ * Anyone is free to copy, modify, publish, use, compile, sell, or
+ * distribute this software, either in source code form or as a compiled
+ * binary, for any purpose, commercial or non-commercial, and by any
+ * means.
+ * 
+ * In jurisdictions that recognize copyright laws, the author or authors
+ * of this software dedicate any and all copyright interest in the
+ * software to the public domain. We make this dedication for the benefit
+ * of the public at large and to the detriment of our heirs and
+ * successors. We intend this dedication to be an overt act of
+ * relinquishment in perpetuity of all present and future rights to this
+ * software under copyright law.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ * For more information, please refer to <http://unlicense.org>
+ * 
+ * ICS.php
+ * =============================================================================
+ * Use this class to create an .ics file.
+ * 
+ *
+ * Usage
+ * -----------------------------------------------------------------------------
+ * Basic usage - generate ics file contents (see below for available properties):
+ *   $ics = new ICS($props);
+ *   $ics_file_contents = $ics->to_string();
+ *
+ * Setting properties after instantiation
+ *   $ics = new ICS();
+ *   $ics->set('summary', 'My awesome event');
+ *
+ * You can also set multiple properties at the same time by using an array:
+ *   $ics->set(array(
+ *     'dtstart' => 'now + 30 minutes',
+ *     'dtend' => 'now + 1 hour'
+ *   ));
+ *
+ * Available properties
+ * -----------------------------------------------------------------------------
+ * description
+ *   String description of the event.
+ * dtend
+ *   A date/time stamp designating the end of the event. You can use either a
+ *   DateTime object or a PHP datetime format string (e.g. "now + 1 hour").
+ * dtstart
+ *   A date/time stamp designating the start of the event. You can use either a
+ *   DateTime object or a PHP datetime format string (e.g. "now + 1 hour").
+ * location
+ *   String address or description of the location of the event.
+ * summary
+ *   String short summary of the event - usually used as the title.
+ * url
+ *   A url to attach to the the event. Make sure to add the protocol (http://
+ *   or https://).
+ */
+
+class ICS {
+  const DT_FORMAT = 'Ymd\THis\Z';
+
+  protected $properties = array();
+  private $available_properties = array(
+    'description',
+    'dtend',
+    'dtstart',
+    'location',
+    'summary',
+    'url',
+    'valarm'
+  );
+
+  public function __construct($props) {
+    $this->set($props);
+  }
+
+  public function set($key, $val = false) {
+    if (is_array($key)) {
+      foreach ($key as $k => $v) {
+        $this->set($k, $v);
+      }
+    } else {
+      if (in_array($key, $this->available_properties)) {
+        $this->properties[$key] = $this->sanitize_val($val, $key);
+      }
+    }
+  }
+
+  public function to_string() {
+    $rows = $this->build_props();
+    return implode("\r\n", $rows);
+  }
+
+  private function build_props() {
+    // Build ICS properties - add header
+    $ics_props = array(
+      'BEGIN:VCALENDAR',
+      'VERSION:2.0',
+      'PRODID:-//hacksw/handcal//NONSGML v1.0//EN',
+      'CALSCALE:GREGORIAN',
+      'BEGIN:VEVENT'
+    );
+
+    // Build ICS properties - add header
+    $props = array();
+    foreach($this->properties as $k => $v) {
+      $props[strtoupper($k . ($k === 'url' ? ';VALUE=URI' : ''))] = $v;
+    }
+
+    // Set some default values
+    $props['DTSTAMP'] = $this->format_timestamp('now');
+    $props['UID'] = uniqid();
+
+    // Append properties
+    foreach ($props as $k => $v) {
+        if($k=='VALARM'){
+            $ics_props[] = "BEGIN:VALARM";
+            $ics_props[] = "$k:$v";
+            if(!empty($props['DESCRIPTION'])){
+                $ics_props[] = "ACTION:DISPLAY";
+            }else{
+                $ics_props[] = "ACTION:AUDIO";
+            }
+            $ics_props[] = "END:VALARM";
+        }else{
+            $ics_props[] = "$k:$v";
+        }
+    }
+    
+    // Build ICS properties - add footer
+    $ics_props[] = 'END:VEVENT';
+    $ics_props[] = 'END:VCALENDAR';
+
+    return $ics_props;
+  }
+
+  private function sanitize_val($val, $key = false) {
+    switch($key) {
+      case 'dtend':
+      case 'dtstamp':
+      case 'dtstart':
+        $val = $this->format_timestamp($val);
+        break;
+      default:
+        $val = $this->escape_string($val);
+    }
+
+    return $val;
+  }
+
+  private function format_timestamp($timestamp) {
+    $dt = new DateTime($timestamp);
+    $dt->setTimezone(new DateTimeZone('UTC'));
+    return $dt->format(self::DT_FORMAT);
+  }
+
+  private function escape_string($str) {
+    return preg_replace('/([\,;])/','\\\$1', $str);
+  }
+}

plugin/Live/Live.php

@@ -3430,7 +3430,20 @@ Click <a href=\"{link}\">here</a> to join our live.";
             $selectedEarlierOptions[] = intval($parts[3]);
         }
         
-        return Scheduler::getReminderOptions($destinationURL, $selectedEarlierOptions);
+        $ls = new Live_schedule($_REQUEST['live_schedule_id']);
+        
+        $ls = new Live_schedule($live_schedule_id);
+        $users_id = Live_schedule::getUsers_idOrCompany($live_schedule_id);
+        $title = $ls->getTitle();
+        $date_start = $ls->getScheduled_time();
+        $date_end = '';
+        $joinURL = Live::getLinkToLiveFromUsers_id($users_id);
+        $joinURL = addQueryStringParameter($joinURL, 'live_schedule', $live_schedule_id);
+                
+        //        , $date_start, $selectedEarlierOptions = array(), $date_end = '', $joinURL='', $description=''
+        
+        return Scheduler::getReminderOptions($destinationURL, $title, $date_start, $selectedEarlierOptions, $date_end, $joinURL);
+
     }
 
     public function getWatchActionButton($videos_id): string {

plugin/Scheduler/Scheduler.php

@@ -1,6 +1,7 @@
 <?php
 
 global $global;
+require_once $global['systemRootPath'] . 'objects/ICS.php';
 require_once $global['systemRootPath'] . 'plugin/Plugin.abstract.php';
 
 require_once $global['systemRootPath'] . 'plugin/Scheduler/Objects/Scheduler_commands.php';
@@ -79,7 +80,7 @@ class Scheduler extends PluginAbstract {
     }
 
     static public function run($scheduler_commands_id) {
-        global $_executeSchelude,$global;
+        global $_executeSchelude, $global;
         if (!isset($_executeSchelude)) {
             $_executeSchelude = array();
         }
@@ -96,7 +97,7 @@ class Scheduler extends PluginAbstract {
             $_executeSchelude[$callBackURL] = url_get_contents($callBackURL, '', 30);
             _error_log("Scheduler::run got callback " . json_encode($_executeSchelude[$callBackURL]));
             $json = _json_decode($_executeSchelude[$callBackURL]);
-            if(is_object($json) && !empty($json->error)){
+            if (is_object($json) && !empty($json->error)) {
                 _error_log("Scheduler::run callback ERROR " . json_encode($json));
                 return false;
             }
@@ -117,7 +118,7 @@ class Scheduler extends PluginAbstract {
         $date_to_execute_time = _strtotime($date_to_execute);
 
         if ($date_to_execute_time <= time()) {
-            _error_log("Scheduler::add ERROR date_to_execute must be greater than now [{$date_to_execute}] ".date('Y/m/d H:i:s', $date_to_execute_time).' '.date('Y/m/d H:i:s'));
+            _error_log("Scheduler::add ERROR date_to_execute must be greater than now [{$date_to_execute}] " . date('Y/m/d H:i:s', $date_to_execute_time) . ' ' . date('Y/m/d H:i:s'));
             return false;
         }
 
@@ -157,7 +158,7 @@ class Scheduler extends PluginAbstract {
         return $scheduler_commands_id;
     }
 
-    static public function getReminderOptions($destinationURL, $selectedEarlierOptions = array(), $earlierOptions = array(
+    static public function getReminderOptions($destinationURL, $title, $date_start, $selectedEarlierOptions = array(), $date_end = '', $joinURL='', $description='',$earlierOptions = array(
                 '10 minutes earlier' => 10,
                 '30 minutes earlier' => 30,
                 '1 hour earlier' => 60,
@@ -168,9 +169,77 @@ class Scheduler extends PluginAbstract {
             )
     ) {
         global $global;
-        $varsArray = array('destinationURL' => $destinationURL, 'earlierOptions' => $earlierOptions, 'selectedEarlierOptions' => $selectedEarlierOptions);
+        $varsArray = array(
+            'destinationURL' => $destinationURL, 
+            'title' => $title, 
+            'date_start' => $date_start, 
+            'selectedEarlierOptions' => $selectedEarlierOptions, 
+            'date_end' => $date_end, 
+            'joinURL' => $joinURL, 
+            'description' => $description,
+            'earlierOptions' => $earlierOptions);
         $filePath = "{$global['systemRootPath']}plugin/Scheduler/reminderOptions.php";
         return getIncludeFileContent($filePath, $varsArray);
     }
 
+    /**
+     * 
+     * @global type $global
+     * @param type $title
+     * @param type $description
+     * @param type $date_start
+     * @param type $date_end
+     * 
+     *  description - string description of the event.
+        dtend - date/time stamp designating the end of the event. You can use either a DateTime object or a PHP datetime format string (e.g. "now + 1 hour").
+        dtstart - date/time stamp designating the start of the event. You can use either a DateTime object or a PHP datetime format string (e.g. "now + 1 hour").
+        location - string address or description of the location of the event.
+        summary - string short summary of the event - usually used as the title.
+        url - string url to attach to the the event. Make sure to add the protocol (http:// or https://).
+     */
+    static public function downloadICS($title, $date_start, $date_end = '', $reminderInMinutes='', $joinURL='', $description='') {
+        global $global,$config;        
+        //var_dump(date_default_timezone_get());exit;
+        header('Content-Type: text/calendar; charset=utf-8');
+        header('Content-Disposition: attachment; filename=invite.ics');
+
+        $location = $config->getWebSiteTitle();
+        if(!isValidURL($joinURL)){
+            $joinURL = $global['webSiteRootURL'];
+        }
+        
+        if(empty($description)){
+            $description = $location;
+        }
+        
+        $date_start = _strtotime($date_start);
+        $date_end = _strtotime($date_end);
+        
+        if(empty($date_end) || $date_end <= $date_start){
+            $date_end = strtotime(date('Y/m/d H:i:s', $date_start).' + 1 hour');
+        }
+        $dtstart = date('Y/m/d H:i:s', $date_start);
+        $dtend = date('Y/m/d H:i:s', $date_end);
+        $reminderInMinutes = intval($reminderInMinutes);
+        if(!empty($reminderInMinutes)){
+            $VALARM = "-P{$reminderInMinutes}M";
+        }else{
+            $VALARM = '';
+        }
+        
+        $props = array(
+            'location' => $location,
+            'description' => $description,
+            'dtstart' => $dtstart,
+            'dtend' => $dtend,
+            'summary' => $title,
+            'url' => $joinURL,
+            'valarm' => $VALARM,
+            //'X-WR-TIMEZONE' => date_default_timezone_get()
+        );
+        $ics = new ICS($props);
+        //var_dump($props);
+        echo $ics->to_string();
+    }
+
 }

plugin/Scheduler/downloadICS.php

@@ -0,0 +1,17 @@
+<?php
+
+//streamer config
+require_once dirname(__FILE__) . '/../../videos/configuration.php';
+
+if(!AVideoPlugin::isEnabledByName('Scheduler')){
+    forbiddenPage('Scheduler is disabled');
+}
+
+if(empty($_REQUEST['title'])){
+    forbiddenPage('Title cannot be empty');
+}
+if(empty($_REQUEST['date_start'])){
+    forbiddenPage('date_start cannot be empty');
+}
+
+Scheduler::downloadICS($_REQUEST['title'], $_REQUEST['date_start'], @$_REQUEST['date_end'], @$_REQUEST['reminder'], @$_REQUEST['joinURL'], @$_REQUEST['description']);

plugin/Scheduler/reminderOptions.php

@@ -4,14 +4,21 @@ $md5DestinationURL = md5($destinationURL);
 <div class="<?php echo $md5DestinationURL; ?>">
     <ul class="list-group">
         <?php
+        $ics = "{$global['webSiteRootURL']}plugin/Scheduler/downloadICS.php";
+        $ics = addQueryStringParameter($ics, 'title', $title);
+        $ics = addQueryStringParameter($ics, 'date_start', $date_start);
+        $ics = addQueryStringParameter($ics, 'date_end', $date_end);
+        $ics = addQueryStringParameter($ics, 'joinURL', $joinURL);
+        $ics = addQueryStringParameter($ics, 'description', $description);
         foreach ($earlierOptions as $key => $value) {
             $checked = '';
             if (in_array($value, $selectedEarlierOptions)) {
                 $checked = 'checked';
             }
+            $icsURL = addQueryStringParameter($ics, 'reminder', $value);
             ?>
             <li class="list-group-item">
-                <?php echo __($key); ?>
+                <a href="<?php echo $icsURL; ?>"><i class="fas fa-file-download" data-toggle="tooltip" title="<?php echo __('Download reminder'); ?>"></i></a> <?php echo __($key); ?>
                 <div class="material-switch pull-right">
                     <input name="reminder<?php echo $value; ?>" id="reminder<?php echo $value; ?>" type="checkbox" value="<?php echo $value; ?>" class="reminder" <?php echo $checked; ?>>
                     <label for="reminder<?php echo $value; ?>" class="label-success"></label>