MDL-60063 feedback: add drag and drop of open close events

mod/feedback/lang/en/feedback.php

@@ -207,6 +207,7 @@
 $string['oldvaluespreserved'] = 'All old questions and the assigned values will be preserved';
 $string['oldvalueswillbedeleted'] = 'Current questions and all responses will be deleted.';
 $string['only_one_captcha_allowed'] = 'Only one captcha is allowed in a feedback';
+$string['openafterclose'] = 'You have specified an open date after the close date';
 $string['overview'] = 'Overview';
 $string['page'] = 'Page';
 $string['page-mod-feedback-x'] = 'Any feedback module page';

mod/feedback/lib.php

@@ -3556,3 +3556,153 @@ function mod_feedback_get_completion_active_rule_descriptions($cm) {
     }
     return $descriptions;
 }
+
+/**
+ * This function calculates the minimum and maximum cutoff values for the timestart of
+ * the given event.
+ *
+ * It will return an array with two values, the first being the minimum cutoff value and
+ * the second being the maximum cutoff value. Either or both values can be null, which
+ * indicates there is no minimum or maximum, respectively.
+ *
+ * If a cutoff is required then the function must return an array containing the cutoff
+ * timestamp and error string to display to the user if the cutoff value is violated.
+ *
+ * A minimum and maximum cutoff return value will look like:
+ * [
+ *     [1505704373, 'The due date must be after the sbumission start date'],
+ *     [1506741172, 'The due date must be before the cutoff date']
+ * ]
+ *
+ * @param calendar_event $event The calendar event to get the time range for
+ * @param stdClass|null $instance The module instance to get the range from
+ * @return array
+ */
+function mod_feedback_core_calendar_get_valid_event_timestart_range(\calendar_event $event, \stdClass $instance = null) {
+    global $DB;
+
+    if (!$instance) {
+        $instance = $DB->get_record('feedback', ['id' => $event->instance], '*', MUST_EXIST);
+    }
+
+    $mindate = null;
+    $maxdate = null;
+
+    if ($event->eventtype == FEEDBACK_EVENT_TYPE_OPEN) {
+        // The start time of the open event can't be equal to or after the
+        // close time of the choice activity.
+        if (!empty($instance->timeclose)) {
+            $maxdate = [
+                $instance->timeclose,
+                get_string('openafterclose', 'feedback')
+            ];
+        }
+    } else if ($event->eventtype == FEEDBACK_EVENT_TYPE_CLOSE) {
+        // The start time of the close event can't be equal to or earlier than the
+        // open time of the choice activity.
+        if (!empty($instance->timeopen)) {
+            $mindate = [
+                $instance->timeopen,
+                get_string('closebeforeopen', 'feedback')
+            ];
+        }
+    }
+
+    return [$mindate, $maxdate];
+}
+
+/**
+ * This function will check that the given event is valid for it's
+ * corresponding feedback module.
+ *
+ * An exception is thrown if the event fails validation.
+ *
+ * @throws \moodle_exception
+ * @param \calendar_event $event
+ */
+function mod_feedback_core_calendar_validate_event_timestart(\calendar_event $event) {
+    global $DB;
+
+    $record = $DB->get_record('feedback', ['id' => $event->instance], '*', MUST_EXIST);
+    $timestart = $event->timestart;
+
+    list($min, $max) = mod_feedback_core_calendar_get_valid_event_timestart_range($event, $record);
+
+    if ($min && $timestart < $min[0]) {
+        throw new \moodle_exception($min[1]);
+    }
+
+    if ($max && $timestart > $max[0]) {
+        throw new \moodle_exception($max[1]);
+    }
+}
+
+/**
+ * This function will update the feedback module according to the
+ * event that has been modified.
+ *
+ * It will set the timeopen or timeclose value of the feedback instance
+ * according to the type of event provided.
+ *
+ * @throws \moodle_exception
+ * @param \calendar_event $event
+ */
+function mod_feedback_core_calendar_event_timestart_updated(\calendar_event $event) {
+    global $CFG, $DB;
+
+    if (empty($event->instance) || $event->modulename != 'feedback') {
+        return;
+    }
+
+    $coursemodule = get_coursemodule_from_instance('feedback',
+                                         $event->instance,
+                                         $event->courseid,
+                                         false,
+                                         MUST_EXIST);
+
+    if (empty($coursemodule)) {
+        // If we don't have a course module yet then it likely means
+        // the activity is still being set up. In this case there is
+        // nothing for us to do anyway.
+        return;
+    }
+
+    $context = context_module::instance($coursemodule->id);
+
+    // The user does not have the capability to modify this activity.
+    if (!has_capability('moodle/course:manageactivities', $context)) {
+        return;
+    }
+
+    $modified = false;
+
+    if ($event->eventtype == FEEDBACK_EVENT_TYPE_OPEN) {
+        // If the event is for the feedback activity opening then we should
+        // set the start time of the feedback activity to be the new start
+        // time of the event.
+        $record = $DB->get_record('feedback', ['id' => $event->instance], '*', MUST_EXIST);
+
+        if ($record->timeopen != $event->timestart) {
+            $record->timeopen = $event->timestart;
+            $record->timemodified = time();
+            $modified = true;
+        }
+    } else if ($event->eventtype == FEEDBACK_EVENT_TYPE_CLOSE) {
+        // If the event is for the feedback activity closing then we should
+        // set the end time of the feedback activity to be the new start
+        // time of the event.
+        $record = $DB->get_record('feedback', ['id' => $event->instance], '*', MUST_EXIST);
+
+        if ($record->timeclose != $event->timestart) {
+            $record->timeclose = $event->timestart;
+            $record->timemodified = time();
+            $modified = true;
+        }
+    }
+
+    if ($modified) {
+        $DB->update_record('feedback', $record);
+        $event = \core\event\course_module_updated::create_from_cm($coursemodule, $context);
+        $event->trigger();
+    }
+}