MDL-37781 Check for switching the workshop phase without waiting for cron

Now we are checking for the need to switch the phase when the main
view.php is displayed to any user (previously this was done via cron
only). To give our subplugins (such as the scheduled allocation method)
a chance to do what they need to do, the workshop_viewed event is
triggered before the phase is actually switched.

mod/workshop/version.php

@@ -24,7 +24,7 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$module->version   = 2012112900;        // the current module version (YYYYMMDDXX)
+$module->version   = 2012112901;        // the current module version (YYYYMMDDXX)
 $module->requires  = 2012112900;        // requires this Moodle version
 $module->component = 'mod_workshop';    // full name of the plugin (used for diagnostics)
 $module->cron      = 60;                // give as a chance every minute

mod/workshop/view.php

@@ -60,6 +60,24 @@ $workshop->log('view');
 $completion = new completion_info($course);
 $completion->set_module_viewed($cm);
 
+// Fire the event
+events_trigger('workshop_viewed', (object)array(
+    'workshop' => $workshop,
+    'user' => $USER,
+));
+
+// If the phase is to be switched, do it asap. This just has to happen after triggering
+// the event so that the scheduled allocator had a chance to allocate submissions.
+if ($workshop->phase == workshop::PHASE_SUBMISSION and $workshop->phaseswitchassessment
+        and $workshop->submissionend > 0 and $workshop->submissionend < time()) {
+    $workshop->switch_phase(workshop::PHASE_ASSESSMENT);
+    $workshop->log('update switch phase', $workshop->view_url(), $workshop->phase);
+    // Disable the automatic switching now so that it is not executed again by accident
+    // if the teacher changes the phase back to the submission one.
+    $DB->set_field('workshop', 'phaseswitchassessment', 0, array('id' => $workshop->id));
+    $workshop->phaseswitchassessment = 0;
+}
+
 if (!is_null($editmode) && $PAGE->user_allowed_editing()) {
     $USER->editing = $editmode;
 }