Add initial JSON parsers for Friendica and Mastodon JSON formats

lib/models/attachment_media_type_enum.dart

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+enum AttachmentMediaType {
+  unknown,
+  image,
+  video;
+
+  static AttachmentMediaType parse(String? text) {
+    if (text == null) {
+      return AttachmentMediaType.unknown;
+    }
+
+    return AttachmentMediaType.values.firstWhere(
+      (e) => e.name == text,
+      orElse: () => unknown,
+    );
+  }
+}

lib/serializers/friendica/connection_friendica_extensions.dart

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+import '../../models/connection.dart';
+
+extension ConnectionFriendicaExtensions on Connection {
+  static Connection fromJson(Map<String, dynamic> json) {
+    final status = (json['following'] ?? '') == 'true'
+        ? ConnectionStatus.youFollowThem
+        : ConnectionStatus.none;
+    final name = json['name'] ?? '';
+    final id = json['id_str'] ?? '';
+    final profileUrl = Uri.parse(json['url'] ?? '');
+    final network = json['network'] ?? 'unkn';
+
+    return Connection(
+        status: status,
+        name: name,
+        id: id,
+        profileUrl: profileUrl,
+        network: network);
+  }
+}

lib/serializers/friendica/media_attachment_friendica_extensions.dart

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+import '../../models/attachment_media_type_enum.dart';
+import '../../models/media_attachment.dart';
+
+extension MediaAttachmentFriendicaExtensions on MediaAttachment {
+  static MediaAttachment fromJson(Map<String, dynamic> json) {
+    final uri = Uri.parse(json['url']);
+    const creationTimestamp = 0;
+    final metadata = (json['metadata'] as Map<String, dynamic>? ?? {})
+        .map((key, value) => MapEntry(key, value.toString()));
+    final explicitType = (json['mimetype'] ?? '').startsWith('image')
+        ? AttachmentMediaType.image
+        : (json['mimetype'] ?? '').startsWith('video')
+            ? AttachmentMediaType.video
+            : AttachmentMediaType.unknown;
+    final thumbnailUri = Uri();
+    const title = '';
+    const description = '';
+
+    return MediaAttachment(
+        uri: uri,
+        creationTimestamp: creationTimestamp,
+        metadata: metadata,
+        thumbnailUri: thumbnailUri,
+        title: title,
+        explicitType: explicitType,
+        description: description);
+  }
+}

lib/serializers/friendica/timeline_entry_friendica_extensions.dart

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+import 'package:flutter_portal/serializers/friendica/connection_friendica_extensions.dart';
+import 'package:flutter_portal/serializers/friendica/media_attachment_friendica_extensions.dart';
+import 'package:logging/logging.dart';
+
+import '../../models/location_data.dart';
+import '../../models/timeline_entry.dart';
+import '../../utils/dateutils.dart';
+
+final _logger = Logger('FriendicaTimelineEntrySerializer');
+
+extension TimelineEntryFriendicaExtensions on TimelineEntry {
+  static TimelineEntry fromJson(Map<String, dynamic> json) {
+    final int timestamp = json.containsKey('created_at')
+        ? OffsetDateTimeUtils.epochSecTimeFromFriendicaString(
+                json['created_at'])
+            .fold(
+                onSuccess: (value) => value,
+                onError: (error) {
+                  _logger.severe("Couldn't read date time string: $error");
+                  return 0;
+                })
+        : 0;
+    final id = json['id_str'] ?? '';
+    final isReshare = json.containsKey('retweeted_status');
+    final parentId = json['in_reply_to_status_id_str'] ?? '';
+    final parentAuthor = json['in_reply_to_screen_name'] ?? '';
+    final parentAuthorId = json['in_reply_to_user_id_str'] ?? '';
+    final body = json['friendica_html'] ?? '';
+    final author = json['user']['name'];
+    final authorId = json['user']['id_str'];
+    final title = json['friendica_title'] ?? '';
+    final externalLink = json['external_url'] ?? '';
+    final actualLocationData = LocationData();
+    final modificationTimestamp = timestamp;
+    final backdatedTimestamp = timestamp;
+    final mediaAttachments = (json['attachments'] as List<dynamic>? ?? [])
+        .map((j) => MediaAttachmentFriendicaExtensions.fromJson(j))
+        .toList();
+    final likes =
+        (json['friendica_activities']?['like'] as List<dynamic>? ?? [])
+            .map((json) => ConnectionFriendicaExtensions.fromJson(json))
+            .toList();
+    final dislikes =
+        (json['friendica_activities']?['dislike'] as List<dynamic>? ?? [])
+            .map((json) => ConnectionFriendicaExtensions.fromJson(json))
+            .toList();
+
+    return TimelineEntry(
+      creationTimestamp: timestamp,
+      modificationTimestamp: modificationTimestamp,
+      backdatedTimestamp: backdatedTimestamp,
+      locationData: actualLocationData,
+      body: body,
+      isReshare: isReshare,
+      id: id,
+      parentId: parentId,
+      parentAuthorId: parentAuthorId,
+      externalLink: externalLink,
+      author: author,
+      authorId: authorId,
+      parentAuthor: parentAuthor,
+      title: title,
+      likes: likes,
+      dislikes: dislikes,
+      mediaAttachments: mediaAttachments,
+    );
+  }
+}

lib/serializers/mastodon/timeline_entry_mastodon_extensions.dart

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+import 'package:logging/logging.dart';
+
+import '../../models/engagement_summary.dart';
+import '../../models/link_data.dart';
+import '../../models/location_data.dart';
+import '../../models/media_attachment.dart';
+import '../../models/timeline_entry.dart';
+import '../../utils/dateutils.dart';
+
+final _logger = Logger('TimelineEntryMastodonExtensions');
+
+extension TimelineEntryMastodonExtensions on TimelineEntry {
+  static TimelineEntry fromJson(Map<String, dynamic> json) {
+    final int timestamp = json.containsKey('created_at')
+        ? OffsetDateTimeUtils.epochSecTimeFromTimeZoneString(json['created_at'])
+            .fold(
+                onSuccess: (value) => value,
+                onError: (error) {
+                  _logger.severe("Couldn't read date time string: $error");
+                  return 0;
+                })
+        : 0;
+    final id = json['id'] ?? '';
+    final isReshare = json.containsKey('reblogged');
+    final parentId = json['in_reply_to_id'] ?? '';
+    final parentAuthor = json['in_reply_to_account_id'] ?? '';
+    final parentAuthorId = json['in_reply_to_account_id'] ?? '';
+    final body = json['content'] ?? '';
+    final author = json['account']['acct'];
+    final authorId = json['account']['id'];
+    const title = '';
+    final externalLink = json['uri'] ?? '';
+    final actualLocationData = LocationData();
+    final modificationTimestamp = timestamp;
+    final backdatedTimestamp = timestamp;
+    final linkData = json['card'] == null
+        ? <LinkData>[]
+        : [LinkData.fromMastodonJson(json['card'])];
+    final mediaAttachments = (json['media_attachments'] as List<dynamic>? ?? [])
+        .map((json) => MediaAttachment.fromMastodonJson(json))
+        .toList();
+    final favoritesCount = json['favorites_count'] ?? 0;
+    final repliesCount = json['replies_count'] ?? 0;
+    final rebloggedCount = json['reblogs_count'] ?? 0;
+    final engagementSummary = EngagementSummary(
+      favoritesCount: favoritesCount,
+      rebloggedCount: rebloggedCount,
+      repliesCount: repliesCount,
+    );
+    return TimelineEntry(
+      creationTimestamp: timestamp,
+      modificationTimestamp: modificationTimestamp,
+      backdatedTimestamp: backdatedTimestamp,
+      locationData: actualLocationData,
+      body: body,
+      isReshare: isReshare,
+      id: id,
+      parentId: parentId,
+      parentAuthorId: parentAuthorId,
+      externalLink: externalLink,
+      author: author,
+      authorId: authorId,
+      parentAuthor: parentAuthor,
+      title: title,
+      links: linkData,
+      mediaAttachments: mediaAttachments,
+      engagementSummary: engagementSummary,
+    );
+  }
+}

test/widget_test.dart

@@ -1,30 +0,0 @@
-// This is a basic Flutter widget test.
-//
-// To perform an interaction with a widget in your test, use the WidgetTester
-// utility in the flutter_test package. For example, you can send tap and scroll
-// gestures. You can also use WidgetTester to find child widgets in the widget
-// tree, read text, and verify that the values of widget properties are correct.
-
-import 'package:flutter/material.dart';
-import 'package:flutter_test/flutter_test.dart';
-
-import 'package:flutter_portal/main.dart';
-
-void main() {
-  testWidgets('Counter increments smoke test', (WidgetTester tester) async {
-    // Build our app and trigger a frame.
-    await tester.pumpWidget(const MyApp());
-
-    // Verify that our counter starts at 0.
-    expect(find.text('0'), findsOneWidget);
-    expect(find.text('1'), findsNothing);
-
-    // Tap the '+' icon and trigger a frame.
-    await tester.tap(find.byIcon(Icons.add));
-    await tester.pump();
-
-    // Verify that our counter has incremented.
-    expect(find.text('0'), findsNothing);
-    expect(find.text('1'), findsOneWidget);
-  });
-}