Draft: Update - Matches export, Master-Filter and indicator for Master OSKAs

• Adding CSV export for matches.
• Filter option for Master-Mentees.
• Only show Master Mentors for Master Mentees in the manual match dialog.

controllers/admin.php

@@ -87,6 +87,14 @@ class AdminController extends PluginController {
         }
 
         $this->matches = $matches;
+
+        $sidebar = Sidebar::Get();
+        $actions = $sidebar->addWidget(new ActionsWidget());
+        $actions->addLink(
+            _('Matches-Liste exportieren'),
+            $this->url_for('admin/export_matches/'),
+            Icon::create('export', 'clickable')
+        );
     }
 
     public function mentees_action($page = 1, $fach_selection= null, $has_oska = null)
@@ -457,6 +465,35 @@ class AdminController extends PluginController {
         $this->redirect('admin/mentees');
     }
 
+    public function export_matches_action()
+    {
+        $data = [array(_('Mentor'), _('Mentee'), _('gemeinsames Fach'))];
+
+        foreach(OskaMatches::findAllMatches() as $match){
+            $mentee = User::find($match['mentee_id']);
+            $mentor = User::find($match['mentor_id']);
+            $studycourse = '';
+
+            foreach ($mentee->studycourses as $i => $val) {
+                if ($val->studycourse->fach_id == OskaMentees::find($match['mentee_id'])->getMenteePrefStudycourse()) {
+                    $studycourse = $val->studycourse->name;
+                }
+            }
+
+            $mentee_data = array(
+                $mentor->nachname . ', ' . $mentor->vorname,
+                $mentee->nachname . ', ' . $mentee->vorname,
+                $studycourse
+            );
+            array_push($data, $mentee_data);
+        }
+
+        $this->render_csv(
+            $data,
+            'Matches.csv'
+        );
+    }
+
     public function export_mentees_action()
     {
         $data = [array(_('Vorname'), _('Nachname'), _('Benutzername'), _('E-Mail'), _('Studiengang'), _('präferiertes Fach'), _('hat OSKA'))];