Slim API deployment - composer install + full CRUD endpoints

www/fahrschultermin.de/app/Repositories/InstructorAvailabilityRepository.php

@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Repositories;
+
+final class InstructorAvailabilityRepository extends BaseRepository
+{
+    public function getForInstructor(int $instructorId): array
+    {
+        $stmt = $this->db->prepare(
+            'SELECT * FROM instructor_availability
+             WHERE instructor_id = :instructor_id
+             ORDER BY weekday, time_from'
+        );
+        $stmt->execute(['instructor_id' => $instructorId]);
+        return $stmt->fetchAll();
+    }
+
+    public function getActiveForInstructor(int $instructorId): array
+    {
+        $stmt = $this->db->prepare(
+            'SELECT * FROM instructor_availability
+             WHERE instructor_id = :instructor_id AND is_active = 1
+             ORDER BY weekday, time_from'
+        );
+        $stmt->execute(['instructor_id' => $instructorId]);
+        return $stmt->fetchAll();
+    }
+
+    public function upsert(int $instructorId, array $entries): void
+    {
+        // Delete all existing, then insert new (full replace)
+        $this->db->beginTransaction();
+        try {
+            $stmt = $this->db->prepare('DELETE FROM instructor_availability WHERE instructor_id = :instructor_id');
+            $stmt->execute(['instructor_id' => $instructorId]);
+
+            $insert = $this->db->prepare(
+                'INSERT INTO instructor_availability (instructor_id, weekday, time_from, time_to, is_active)
+                 VALUES (:instructor_id, :weekday, :time_from, :time_to, :is_active)'
+            );
+            foreach ($entries as $e) {
+                $insert->execute([
+                    'instructor_id' => $instructorId,
+                    'weekday' => (int) $e['weekday'],
+                    'time_from' => $e['time_from'],
+                    'time_to' => $e['time_to'],
+                    'is_active' => (int) ($e['is_active'] ?? 1),
+                ]);
+            }
+            $this->db->commit();
+        } catch (\Throwable $e) {
+            $this->db->rollBack();
+            throw $e;
+        }
+    }
+
+    public function delete(int $id): bool
+    {
+        $stmt = $this->db->prepare('DELETE FROM instructor_availability WHERE id = :id RETURNING id');
+        $stmt->execute(['id' => $id]);
+        return (bool) $stmt->fetch();
+    }
+}