Initial commit

lib/core/util.dart

@@ -0,0 +1,66 @@
+import 'dart:convert';
+import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:flutter_paperless_mobile/core/logic/timeout_client.dart';
+import 'package:flutter_paperless_mobile/core/model/error_message.dart';
+import 'package:flutter_paperless_mobile/core/type/json.dart';
+import 'package:flutter_paperless_mobile/di_initializer.dart';
+import 'package:http/http.dart';
+import 'package:path_provider/path_provider.dart';
+
+const requestTimeout = Duration(seconds: 5);
+
+Future<T> getSingleResult<T>(
+  String url,
+  T Function(JSON) fromJson,
+  ErrorCode errorCode, {
+  int minRequiredApiVersion = 1,
+}) async {
+  final httpClient = getIt<BaseClient>(instanceName: "timeoutClient");
+  final response = await httpClient.get(
+    Uri.parse(url),
+    headers: {'accept': 'application/json; version=$minRequiredApiVersion'},
+  );
+  if (response.statusCode == 200) {
+    return fromJson(jsonDecode(utf8.decode(response.bodyBytes)) as JSON);
+  }
+  return Future.error(errorCode);
+}
+
+Future<List<T>> getCollection<T>(
+  String url,
+  T Function(JSON) fromJson,
+  ErrorCode errorCode, {
+  int minRequiredApiVersion = 1,
+}) async {
+  final httpClient = getIt<BaseClient>(instanceName: "timeoutClient");
+  final response = await httpClient.get(
+    Uri.parse(url),
+    headers: {'accept': 'application/json; version=$minRequiredApiVersion'},
+  );
+  if (response.statusCode == 200) {
+    final JSON body = jsonDecode(utf8.decode(response.bodyBytes));
+    if (body.containsKey('count')) {
+      if (body['count'] == 0) {
+        return <T>[];
+      } else {
+        return body['results'].cast<JSON>().map<T>((result) => fromJson(result)).toList();
+      }
+    }
+  }
+  return Future.error(errorCode);
+}
+
+class FileUtils {
+  static Future<File> saveToFile(
+    Uint8List bytes,
+    String filename, {
+    StorageDirectory directoryType = StorageDirectory.documents,
+  }) async {
+    final dir = (await getExternalStorageDirectories(type: directoryType));
+    File file = File("$dir/$filename");
+    file.writeAsBytesSync(bytes);
+    return file;
+  }
+}