added cargo files

PinePods-0.8.2/mobile/lib/core/environment.dart

@@ -0,0 +1,54 @@
+// Copyright 2020 Ben Hills and the project contributors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:io';
+
+/// The key required when searching via PodcastIndex.org.
+const podcastIndexKey = String.fromEnvironment('PINDEX_KEY', defaultValue: '');
+
+/// The secret required when searching via PodcastIndex.org.
+const podcastIndexSecret = String.fromEnvironment(
+  'PINDEX_SECRET',
+  defaultValue: '',
+);
+
+/// Allows a user to override the default user agent string.
+const userAgentAppString = String.fromEnvironment(
+  'USER_AGENT',
+  defaultValue: '',
+);
+
+/// Link to a feedback form. This will be shown in the main overflow menu if set
+const feedbackUrl = String.fromEnvironment('FEEDBACK_URL', defaultValue: '');
+
+/// This class stores version information for PinePods, including project version and
+/// build number. This is then used for user agent strings when interacting with
+/// APIs and RSS feeds.
+///
+/// The user agent string can be overridden by passing in the USER_AGENT variable
+/// using dart-define.
+class Environment {
+  static const _applicationName = 'Pinepods';
+  static const _applicationUrl =
+      'https://github.com/madeofpendletonwool/pinepods';
+  static const _projectVersion = '0.8.1';
+  static const _build = '20252203';
+
+  static var _agentString = userAgentAppString;
+
+  static String userAgent() {
+    if (_agentString.isEmpty) {
+      var platform =
+          '${Platform.operatingSystem} ${Platform.operatingSystemVersion}'
+              .trim();
+
+      _agentString =
+          '$_applicationName/$_projectVersion b$_build (phone;$platform) $_applicationUrl';
+    }
+
+    return _agentString;
+  }
+
+  static String get projectVersion => '$_projectVersion b$_build';
+}