From 526077259c8d4c530db1074f70a80b49ff625bf7 Mon Sep 17 00:00:00 2001
From: Isuru Madushanka Weerarathna <uisurumadushanka89@gmail.com>
Date: Fri, 20 Jul 2012 07:12:42 +0530
Subject: [PATCH] choice calendar events added

---
 mod/choice/lang/en/choice.php |    2 +
 mod/choice/lib.php            |   80 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 82 insertions(+), 0 deletions(-)

diff --git a/mod/choice/lang/en/choice.php b/mod/choice/lang/en/choice.php
index c069dc1..e328184 100644
--- a/mod/choice/lang/en/choice.php
+++ b/mod/choice/lang/en/choice.php
@@ -36,12 +36,14 @@ $string['full'] = '(Full)';
 $string['havetologin'] = 'You have to log in before you can submit your choice';
 $string['choice'] = 'Choice';
 $string['choiceclose'] = 'Until';
+$string['choicecloses'] = 'Choice closes';
 $string['choice:deleteresponses'] = 'Delete responses';
 $string['choice:downloadresponses'] = 'Download responses';
 $string['choicefull'] = 'This choice is full and there are no available places.';
 $string['choice:choose'] = 'Record a choice';
 $string['choicename'] = 'Choice name';
 $string['choiceopen'] = 'Open';
+$string['choiceopens'] = 'Choice opens';
 $string['choiceoptions'] = 'Choice options';
 $string['choiceoptions_help'] = 'Here is where you specify the options that participants have to choose from.
 
diff --git a/mod/choice/lib.php b/mod/choice/lib.php
index 6c247c2..75d9084 100644
--- a/mod/choice/lib.php
+++ b/mod/choice/lib.php
@@ -20,6 +20,7 @@
  * @copyright 1999 onwards Martin Dougiamas  {@link http://moodle.com}
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
+require_once($CFG->dirroot.'/calendar/lib.php');
 
 /** @global int $CHOICE_COLUMN_HEIGHT */
 global $CHOICE_COLUMN_HEIGHT;
@@ -40,6 +41,12 @@ define('CHOICE_SHOWRESULTS_ALWAYS',       '3');
 define('CHOICE_DISPLAY_HORIZONTAL',  '0');
 define('CHOICE_DISPLAY_VERTICAL',    '1');
 
+/**
+ * If start and end date for the choice are more than this many seconds apart
+ * they will be represented by two separate events in the calendar
+ */
+define('CHOICE_MAX_EVENT_LENGTH', 5*24*60*60); // 5 days
+
 /** @global array $CHOICE_PUBLISH */
 global $CHOICE_PUBLISH;
 $CHOICE_PUBLISH = array (CHOICE_PUBLISH_ANONYMOUS  => get_string('publishanonymous', 'choice'),
@@ -134,6 +141,9 @@ function choice_add_instance($choice) {
         }
     }
 
+    // add/update calendar event from this event
+    choice_update_events($choice);
+    
     return $choice->id;
 }
 
@@ -182,11 +192,72 @@ function choice_update_instance($choice) {
         }
     }
 
+    // add/update calendar event from this event
+    choice_update_events($choice);
+    
     return $DB->update_record('choice', $choice);
 
 }
 
 /**
+ * This function updates the events associated to the choice.
+ * If $override is non-zero, then it updates only the events
+ * associated with the specified override.
+ *
+ * @uses CHOICE_MAX_EVENT_LENGTH
+ * @param object $choice the choice object.
+ */
+function choice_update_events($choice) {
+    global $DB;
+    
+    // Load the old events relating to this choice.
+    $conds = array('modulename'=>'choice', 'instance'=>$choice->id);
+    $oldevents = $DB->get_records('event', $conds);
+    foreach($oldevents as $event) {
+        $event = calendar_event::load($event->id);
+        $event->delete();
+    }
+    
+    if (empty($choice->timerestrict)) {
+        return;
+    }
+    
+    $event = new stdClass;
+    $event->description = $choice->intro;
+    $event->courseid    = $choice->course;
+    $event->groupid     = 0;
+    $event->userid      = 0;
+    $event->modulename  = 'choice';
+    $event->instance    = $choice->id;
+    $event->eventtype   = 'open';
+    $event->timestart   = $choice->timeopen;
+
+    $event->visible     = instance_is_visible('choice', $choice);
+
+    $event->timeduration = ($choice->timeclose - $choice->timeopen);
+
+    if ($choice->timeclose and $choice->timeopen and $event->timeduration <= CHOICE_MAX_EVENT_LENGTH) {
+        // Single event for the whole lesson.
+        $event->name = $choice->name;
+        calendar_event::create(clone($event));
+    } else {
+        // Separate start and end events.
+        $event->timeduration  = 0;
+        if ($choice->timeopen) {
+            $event->name = $choice->name.' ('.get_string('choiceopens', 'choice').')';
+            calendar_event::create(clone($event));
+        }
+
+        if ($choice->timeclose) {
+            $event->name      = $choice->name.' ('.get_string('choicecloses', 'choice').')';
+            $event->timestart = $choice->timeclose;
+            $event->eventtype = 'close';
+            calendar_event::create(clone($event));
+        }
+    }
+}
+
+/**
  * @global object
  * @param object $choice
  * @param object $user
@@ -580,6 +651,15 @@ function choice_delete_instance($id) {
         $result = false;
     }
 
+    // delete caledar event if exist.
+    $events = $DB->get_records('event', array('modulename' => 'choice', 'instance' => $choice->id));
+    if (!empty($events)) {
+        foreach ($events as $event) {
+            $event = calendar_event::load($event);
+            $event->delete();
+        }
+    }
+    
     if (! $DB->delete_records("choice", array("id"=>"$choice->id"))) {
         $result = false;
     }
-- 
1.7.8.msysgit.0