Create CSV export for Teilnehmr

includes/admin-teilnehmer.php

@@ -7,6 +7,14 @@ function kc_teilnehmer_page() {
     $all_wahlen = $wpdb->get_results("SELECT id, name, anzahl_einheiten FROM {$prefix}kc_wahlen WHERE deleted=0 ORDER BY id DESC");
     $all_workshops = $wpdb->get_results("SELECT id, name FROM {$prefix}kc_workshops ORDER BY name");
 
+    // Map of wahl id => name for quick lookup
+    $wahl_name_map = [];
+    if (!empty($all_wahlen)) {
+        foreach ($all_wahlen as $w) {
+            $wahl_name_map[intval($w->id)] = $w->name;
+        }
+    }
+
     // Map of workshop id => name for quick lookup in overview
     $workshops_map = [];
     if (!empty($all_workshops)) {
@@ -15,6 +23,59 @@ function kc_teilnehmer_page() {
         }
     }
 
+    // CSV-Export (alle Teilnehmer oder gefiltert nach Wahl)
+    if (isset($_GET['export_csv']) && current_user_can('manage_options')) {
+        $export_wahl_id = isset($_GET['wahl_id']) ? intval($_GET['wahl_id']) : 0;
+
+        $sql = "SELECT * FROM {$prefix}kc_teilnehmer";
+        if ($export_wahl_id > 0) {
+            $sql .= $wpdb->prepare(" WHERE wahl_id=%d", $export_wahl_id);
+        }
+        $sql .= " ORDER BY wahl_id, phase, nachname, vorname";
+        $export_rows = $wpdb->get_results($sql);
+
+        $filename_suffix = $export_wahl_id > 0 ? '_wahl_'.$export_wahl_id : '_alle';
+        header('Content-Type: text/csv; charset=utf-8');
+        header('Content-Disposition: attachment; filename="kc_teilnehmer'.$filename_suffix.'.csv"');
+        echo "\xEF\xBB\xBF";
+
+        $output = fopen('php://output', 'w');
+        $delimiter = ';';
+        fputcsv($output, ['Vorname','Nachname','Wahl','Phase','Wunsch 1','Wunsch 2','Wunsch 3'], $delimiter);
+
+        foreach ($export_rows as $tn) {
+            $w1_id = intval($tn->wunsch1);
+            $w2_id = intval($tn->wunsch2);
+            $w3_id = intval($tn->wunsch3);
+
+            $w1_disp = $w1_id && isset($workshops_map[$w1_id]) ? $workshops_map[$w1_id] : ($w1_id ? strval($w1_id) : '');
+            $w2_disp = $w2_id && isset($workshops_map[$w2_id]) ? $workshops_map[$w2_id] : ($w2_id ? strval($w2_id) : '');
+            $w3_disp = $w3_id && isset($workshops_map[$w3_id]) ? $workshops_map[$w3_id] : ($w3_id ? strval($w3_id) : '');
+
+            $wahl_name = isset($wahl_name_map[intval($tn->wahl_id)]) ? $wahl_name_map[intval($tn->wahl_id)] : '';
+
+            $vorname = preg_replace('/<[^>]*>/', '', $tn->vorname);
+            $nachname = preg_replace('/<[^>]*>/', '', $tn->nachname);
+            $wahl_name_clean = preg_replace('/<[^>]*>/', '', $wahl_name);
+            $w1_clean = preg_replace('/<[^>]*>/', '', $w1_disp);
+            $w2_clean = preg_replace('/<[^>]*>/', '', $w2_disp);
+            $w3_clean = preg_replace('/<[^>]*>/', '', $w3_disp);
+
+            fputcsv($output, [
+                $vorname,
+                $nachname,
+                $wahl_name_clean,
+                intval($tn->phase),
+                $w1_clean,
+                $w2_clean,
+                $w3_clean
+            ], $delimiter);
+        }
+
+        fclose($output);
+        exit;
+    }
+
     // Build map of wahl -> phases + workshops (for JS)
     $wahl_map = [];
     foreach($all_wahlen as $w) {
@@ -222,13 +283,10 @@ function kc_teilnehmer_page() {
     }
 
     // Übersicht
-    // Map für Wahl-ID => Name
+    // Map für Wahl-ID => Name ist bereits oben aufgebaut
-    $wahl_name_map = [];
-    foreach($all_wahlen as $w) {
-        $wahl_name_map[intval($w->id)] = $w->name;
-    }
     echo '<div class="kc-admin-table-wrap">';
     echo '<h2 style="margin-top:0;">Alle Teilnehmer</h2>';
+    echo '<a class="kc-btn" style="float:right;margin-right:8px;margin-bottom:12px;background:#2da66a;color:#fff;" href="?page=kc_teilnehmer&export_csv=1">CSV Export</a>';
     echo '<a class="kc-btn" style="float:right;margin-bottom:12px;" href="?page=kc_teilnehmer&new=1">+ Neuer Teilnehmer</a>';
 
     // Wahl-Filter-Buttons sortiert nach KC1, KC2, KC3, dann Rest
@@ -271,11 +329,19 @@ function kc_teilnehmer_page() {
 
     foreach ($gruppen as $wid => $phasen) {
         $wahl_disp = isset($wahl_name_map[$wid]) ? esc_html($wahl_name_map[$wid]) : $wid;
+        $csv_wahl_url = add_query_arg([
+            'page' => 'kc_teilnehmer',
+            'export_csv' => 1,
+            'wahl_id' => intval($wid)
+        ], admin_url('admin.php'));
         // Gesamtanzahl Teilnehmer für diese Wahl berechnen
         $gesamt = 0;
         foreach ($phasen as $tns) $gesamt += count($tns);
         echo '<details style="margin:10px 0 18px 0;border:1px solid #eaeaea;border-radius:6px;padding:8px;">';
         echo '<summary style="font-weight:700;cursor:pointer;">'. $wahl_disp . ' <span style="color:#555;font-weight:600;">(' . $gesamt . ' TN)</span></summary>';
+        echo '<div style="text-align:right;margin:8px 0 4px 0;">';
+        echo '<a class="kc-btn" style="background:#2da66a;color:#fff;" href="'.esc_url($csv_wahl_url).'">CSV Export dieser Wahl</a>';
+        echo '</div>';
         foreach ($phasen as $phase => $tns) {
             echo '<details style="margin:10px 0 10px 0;border:1px solid #f0f0f0;border-radius:6px;padding:8px;">';
             echo '<summary style="font-weight:600;">Phase '.intval($phase).' <span style="color:#555;font-weight:600;">('.count($tns).' TN)</span></summary>';