Veranstalter am Markt verankern

modules/erp/kontakte/service.php

@@ -166,6 +166,76 @@ function get_party_options(PDO $pdo): array
     );
 }
 
+function get_market_organizer_options(PDO $pdo): array
+{
+    $stmt = $pdo->query(
+        "SELECT p.id, p.name, p.email, p.phone
+         FROM party p
+         INNER JOIN party_role pr ON pr.party_id = p.id AND pr.role_code = 'market_organizer'
+         WHERE p.status = 'active'
+         ORDER BY p.name ASC, p.id ASC"
+    );
+
+    return $stmt->fetchAll() ?: [];
+}
+
+function get_market_organizer_reference(PDO $pdo, int $partyId): ?array
+{
+    $stmt = $pdo->prepare(
+        "SELECT p.id, p.name, p.email, p.phone
+         FROM party p
+         INNER JOIN party_role pr ON pr.party_id = p.id AND pr.role_code = 'market_organizer'
+         WHERE p.id = :id AND p.status = 'active'"
+    );
+    $stmt->execute([':id' => $partyId]);
+    $party = $stmt->fetch();
+
+    return is_array($party) ? $party : null;
+}
+
+function create_market_organizer(PDO $pdo, string $name, ?string $email = null, ?string $phone = null): array
+{
+    $name = trim($name);
+    $email = $email !== null ? trim($email) : null;
+    $phone = $phone !== null ? trim($phone) : null;
+    if ($name === '') {
+        throw new InvalidArgumentException('Veranstaltername fehlt.');
+    }
+
+    $pdo->beginTransaction();
+    try {
+        $stmt = $pdo->prepare(
+            "SELECT id, name, email, phone FROM party WHERE LOWER(TRIM(name)) = LOWER(:name) LIMIT 1 FOR UPDATE"
+        );
+        $stmt->execute([':name' => $name]);
+        $party = $stmt->fetch();
+        if (!is_array($party)) {
+            $stmt = $pdo->prepare(
+                "INSERT INTO party (type, name, email, phone, status, created_at, updated_at)
+                 VALUES ('customer', :name, :email, :phone, 'active', NOW(), NOW())
+                 RETURNING id, name, email, phone"
+            );
+            $stmt->execute([':name' => $name, ':email' => $email ?: null, ':phone' => $phone ?: null]);
+            $party = $stmt->fetch();
+        }
+        if (!is_array($party)) {
+            throw new RuntimeException('Veranstalter konnte nicht angelegt werden.');
+        }
+        $role = $pdo->prepare(
+            "INSERT INTO party_role (party_id, role_code) VALUES (:party_id, 'market_organizer')
+             ON CONFLICT (party_id, role_code) DO NOTHING"
+        );
+        $role->execute([':party_id' => (int) $party['id']]);
+        $pdo->commit();
+        return (array) $party;
+    } catch (Throwable $error) {
+        if ($pdo->inTransaction()) {
+            $pdo->rollBack();
+        }
+        throw $error;
+    }
+}
+
 function get_contact_options(PDO $pdo): array
 {
     $stmt = $pdo->query(