Initial Commit

lib/audio_cache.dart

@@ -0,0 +1,64 @@
+
+import 'dart:typed_data';
+
+import 'package:archive/archive.dart';
+import 'package:flutter/services.dart';
+
+class AudioCache {
+
+  // Filename, bytes
+  Map<String, Uint8List> _audioCache = {};
+
+  List<String> get keys {
+    return _audioCache.keys.toList();
+  }
+
+  Uint8List operator [](String key) {
+    return _audioCache[key]!;
+  }
+}
+
+class AnnouncementCache extends AudioCache {
+
+  String _assetLocation = "assets/ibus_recordings.zip";
+
+  Future<void> loadAnnouncements(List<String> Announcements) async {
+
+    final bytes = await rootBundle.load(_assetLocation);
+    final archive = ZipDecoder().decodeBytes(bytes.buffer.asUint8List());
+
+    for (final file in archive) {
+      if (Announcements.contains(file.name)) {
+        _audioCache[file.name] = file.content;
+      }
+    }
+  }
+
+  Future<void> loadAllAnnouncements() async {
+
+    print("Loading all announcements.");
+
+    final bytes = await rootBundle.load(_assetLocation);
+    final archive = ZipDecoder().decodeBytes(bytes.buffer.asUint8List());
+
+    print("Done decoding zip file.");
+    print("Number of files: ${archive.length}");
+
+    for (final file in archive) {
+
+      if (file.isFile == false) {
+        continue;
+      }
+
+      String filename = file.name;
+      if (filename.contains("/")) {
+        filename = filename.split("/").last;
+      }
+
+      _audioCache[filename] = file.content;
+    }
+
+    print("Done loading all announcements.");
+  }
+
+}