Kleine Änderungen

zahler.php

@@ -0,0 +1,35 @@
+<?php
+function get_next_payer_username($conn, $meeting_id)
+{
+    $sql = "
+        SELECT 
+            u.username,
+            (SELECT COUNT(*) FROM meeting_teilnehmer WHERE user_id = u.id AND paid = 1) AS paid_count
+        FROM meeting_teilnehmer mt
+        JOIN users u ON mt.user_id = u.id
+        WHERE mt.meeting_id = ? AND mt.rsvp_status = 'accepted'
+        ORDER BY paid_count ASC
+    ";
+    $stmt = mysqli_prepare($conn, $sql);
+    if (!$stmt) return null;
+
+    mysqli_stmt_bind_param($stmt, "i", $meeting_id);
+    mysqli_stmt_execute($stmt);
+    $result = mysqli_stmt_get_result($stmt);
+
+    $candidates = [];
+    $min_count = -1;
+    while ($row = mysqli_fetch_assoc($result)) {
+        if ($min_count == -1 || $row['paid_count'] < $min_count) {
+            $min_count = $row['paid_count'];
+            $candidates = [$row['username']];
+        } elseif ($row['paid_count'] == $min_count) {
+            $candidates[] = $row['username'];
+        }
+    }
+    mysqli_stmt_close($stmt);
+
+    if (empty($candidates)) return null;
+    sort($candidates);
+    return $candidates[0];
+}