implement video download

needs check, if converted files can be run on device

Signed-off-by: Peter Siegmund <developer@mars3142.org>

server/cinema/lib/feature/video/data/repositories/tmdb_video_loader.dart

@@ -0,0 +1,77 @@
+import 'package:cinema/common/dio_module.dart';
+import 'package:cinema/common/video_downloader.dart';
+import 'package:cinema/feature/poster/domain/movie.dart';
+import 'package:cinema/feature/video/data/repositories/video_loader.dart';
+import 'package:dio/dio.dart';
+import 'package:injectable/injectable.dart';
+
+@Injectable(as: VideoLoader)
+class TmdbVideoLoader implements VideoLoader {
+  final Dio api;
+  final VideoDownloader _videoDownloader;
+
+  TmdbVideoLoader(@Named(dioAPI) this.api, this._videoDownloader);
+
+  @override
+  Future<String?> getYouTubeVideoId(int movieId, {String language = 'de'}) async {
+    try {
+      final response = await api.get('/movie/$movieId/videos?language=$language');
+      if (response.data != null && response.data['results'] != null) {
+        final results = response.data['results'] as List;
+
+        // Filtere nur YouTube Videos
+        final youtubeVideos = results.where((v) => v['site'] == 'YouTube').toList();
+        if (youtubeVideos.isEmpty) {
+          return null;
+        }
+
+        // Sortiere nach published_at absteigend (neueste zuerst)
+        youtubeVideos.sort((a, b) {
+          final dateA = DateTime.tryParse(a['published_at'] ?? '') ?? DateTime(1970);
+          final dateB = DateTime.tryParse(b['published_at'] ?? '') ?? DateTime(1970);
+          return dateB.compareTo(dateA);
+        });
+
+        // Suche den neuesten Trailer oder Teaser
+        for (final video in youtubeVideos) {
+          if (video['type'] == 'Trailer' || video['type'] == 'Teaser') {
+            return video['key'] as String?;
+          }
+        }
+
+        // Falls kein Trailer/Teaser, nimm das neueste YouTube Video
+        return youtubeVideos.first['key'] as String?;
+      }
+    } catch (e) {
+      print('Error fetching video for movie $movieId: $e');
+    }
+    return null;
+  }
+
+  @override
+  Future<bool> downloadVideo(Movie movie) async {
+
+    final videoId = await getYouTubeVideoId(movie.id);
+    if (videoId == null) {
+      print('No YouTube video found for movie ${movie.id} (${movie.title})');
+      return false;
+    }
+
+    // Check if already cached
+    if (await _videoDownloader.isCached(videoId)) {
+      print('Video already cached: ${movie.title} ($videoId)');
+      return true;
+    }
+
+    print('Downloading video: ${movie.title} ($videoId)...');
+    final path = await _videoDownloader.downloadAndResize(videoId);
+
+    if (path != null) {
+      print('Video cached successfully: ${movie.title} ($videoId)');
+      return true;
+    }
+
+    print('Failed to cache video: ${movie.title} ($videoId)');
+    return false;
+  }
+}

server/cinema/lib/feature/video/data/repositories/video_loader.dart

@@ -0,0 +1,7 @@
+import 'package:cinema/feature/poster/domain/movie.dart';
+
+abstract class VideoLoader {
+  Future<String?> getYouTubeVideoId(int movieId, {String language = 'de'});
+
+  Future<bool> downloadVideo(Movie movie);
+}

server/cinema/lib/feature/video/data/services/video.service.dart

@@ -0,0 +1,75 @@
+import 'dart:convert';
+
+import 'package:cinema/common/video_downloader.dart';
+import 'package:injectable/injectable.dart';
+import 'package:shelf/shelf.dart';
+import 'package:shelf_router/shelf_router.dart';
+
+part 'video.service.g.dart';
+
+@injectable
+class VideoService {
+  final VideoDownloader _videoDownloader;
+
+  VideoService(this._videoDownloader);
+
+  @Route.get('/<videoId>')
+  Future<Response> downloadVideo(Request request, String videoId) async {
+    // Validate video ID (YouTube IDs are 11 characters, alphanumeric with - and _)
+    if (!RegExp(r'^[a-zA-Z0-9_-]{11}$').hasMatch(videoId)) {
+      return Response(
+        400,
+        body: jsonEncode({'error': 'Invalid YouTube video ID'}),
+        headers: {'Content-Type': 'application/json'},
+      );
+    }
+
+    // Check if already cached
+    if (await _videoDownloader.isCached(videoId)) {
+      return Response.ok(
+        jsonEncode({
+          'status': 'cached',
+          'videoId': videoId,
+          'path': '${VideoDownloader.cacheDir}/$videoId/video.mp4',
+        }),
+        headers: {'Content-Type': 'application/json'},
+      );
+    }
+
+    // Download and resize
+    final path = await _videoDownloader.downloadAndResize(videoId);
+
+    if (path == null) {
+      return Response(
+        500,
+        body: jsonEncode({
+          'error': 'Failed to download or resize video',
+          'videoId': videoId,
+        }),
+        headers: {'Content-Type': 'application/json'},
+      );
+    }
+
+    return Response.ok(
+      jsonEncode({
+        'status': 'downloaded',
+        'videoId': videoId,
+        'path': path,
+        'size': '${VideoDownloader.maxWidth}x${VideoDownloader.maxHeight} (max)',
+      }),
+      headers: {'Content-Type': 'application/json'},
+    );
+  }
+
+  @Route.get('/')
+  Future<Response> listVideos(Request request) async {
+    final videos = await _videoDownloader.getCachedVideos();
+
+    return Response.ok(
+      jsonEncode({'videos': videos}),
+      headers: {'Content-Type': 'application/json'},
+    );
+  }
+
+  Router get router => _$VideoServiceRouter(this);
+}