feat: files screen (#75)

Fixes #74

lib/models/github.dart

@@ -325,3 +325,28 @@ class GithubUserOrganizationItem {
   factory GithubUserOrganizationItem.fromJson(Map<String, dynamic> json) =>
       _$GithubUserOrganizationItemFromJson(json);
 }
+
+@JsonSerializable(fieldRename: FieldRename.snake)
+class GithubGistsItem {
+  int id;
+  bool isFork;
+  bool isPublic;
+  String name;
+  DateTime updatedAt;
+  GithubGistsItem();
+  factory GithubGistsItem.fromJson(Map<String, dynamic> json) =>
+      _$GithubGistsItemFromJson(json);
+}
+
+@JsonSerializable(fieldRename: FieldRename.snake)
+class GithubFilesItem {
+  String filename;
+  String status;
+  int additions;
+  int deletions;
+  int changes;
+  String patch;
+  GithubFilesItem();
+  factory GithubFilesItem.fromJson(Map<String, dynamic> json) =>
+      _$GithubFilesItemFromJson(json);
+}

lib/models/github.g.dart

@@ -460,3 +460,43 @@ Map<String, dynamic> _$GithubUserOrganizationItemToJson(
       'description': instance.description,
       'url': instance.url,
     };
+
+GithubGistsItem _$GithubGistsItemFromJson(Map<String, dynamic> json) {
+  return GithubGistsItem()
+    ..id = json['id'] as int
+    ..isFork = json['is_fork'] as bool
+    ..isPublic = json['is_public'] as bool
+    ..name = json['name'] as String
+    ..updatedAt = json['updated_at'] == null
+        ? null
+        : DateTime.parse(json['updated_at'] as String);
+}
+
+Map<String, dynamic> _$GithubGistsItemToJson(GithubGistsItem instance) =>
+    <String, dynamic>{
+      'id': instance.id,
+      'is_fork': instance.isFork,
+      'is_public': instance.isPublic,
+      'name': instance.name,
+      'updated_at': instance.updatedAt?.toIso8601String(),
+    };
+
+GithubFilesItem _$GithubFilesItemFromJson(Map<String, dynamic> json) {
+  return GithubFilesItem()
+    ..filename = json['filename'] as String
+    ..status = json['status'] as String
+    ..additions = json['additions'] as int
+    ..deletions = json['deletions'] as int
+    ..changes = json['changes'] as int
+    ..patch = json['patch'] as String;
+}
+
+Map<String, dynamic> _$GithubFilesItemToJson(GithubFilesItem instance) =>
+    <String, dynamic>{
+      'filename': instance.filename,
+      'status': instance.status,
+      'additions': instance.additions,
+      'deletions': instance.deletions,
+      'changes': instance.changes,
+      'patch': instance.patch,
+    };

lib/router.dart

@@ -6,6 +6,7 @@ import 'package:git_touch/screens/bb_user.dart';
 import 'package:git_touch/screens/code_theme.dart';
 import 'package:git_touch/screens/gh_commits.dart';
 import 'package:git_touch/screens/gh_contributors.dart';
+import 'package:git_touch/screens/gh_files.dart';
 import 'package:git_touch/screens/gh_org_repos.dart';
 import 'package:git_touch/screens/gl_commit.dart';
 import 'package:git_touch/screens/gl_starrers.dart';
@@ -37,6 +38,7 @@ import 'package:git_touch/screens/settings.dart';
 import 'package:git_touch/screens/gh_user.dart';
 import 'package:git_touch/screens/gh_users.dart';
 import 'package:git_touch/screens/gh_user_organization.dart';
+import 'package:git_touch/screens/gh_gists.dart';
 
 class RouterScreen {
   String path;
@@ -74,6 +76,7 @@ class GithubRouter {
     GithubRouter.stargazers,
     GithubRouter.watchers,
     GithubRouter.contributors,
+    GithubRouter.files,
   ];
   static final user = RouterScreen('/:login', (_, p) {
     final login = p['login'].first;
@@ -93,6 +96,8 @@ class GithubRouter {
         return GhOrgReposScreen(login);
       case 'organizations':
         return GhUserOrganizationScreen(login);
+      case 'gists':
+        return GhGistsScreen(login);
       default:
         return GhUserScreen(login);
     }
@@ -121,6 +126,13 @@ class GithubRouter {
       (context, p) => GhIssueScreen(
           p['owner'].first, p['name'].first, int.parse(p['number'].first),
           isPullRequest: true));
+  static final files = RouterScreen(
+      '/:owner/:name/pull/:number/files',
+      (context, p) => GhFilesScreen(
+            p['owner'].first,
+            p['name'].first,
+            int.parse(p['number'].first),
+          ));
   static final commits = RouterScreen('/:owner/:name/commits',
       (context, p) => GhCommitsScreen(p['owner'].first, p['name'].first));
   static final object = RouterScreen('/:owner/:name/blob/:ref', (_, p) {

lib/screens/gh_files.dart

@@ -0,0 +1,57 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:git_touch/models/github.dart';
+import 'package:git_touch/scaffolds/list_stateful.dart';
+import 'package:git_touch/widgets/action_button.dart';
+import 'package:git_touch/widgets/app_bar_title.dart';
+import 'package:provider/provider.dart';
+import 'package:git_touch/widgets/files_item.dart';
+import 'package:git_touch/models/auth.dart';
+
+class GhFilesScreen extends StatelessWidget {
+  final String owner;
+  final String name;
+  final int pullNumber;
+  GhFilesScreen(this.owner, this.name, this.pullNumber);
+
+  Future<ListPayload<GithubFilesItem, int>> _query(BuildContext context,
+      [int page = 1]) async {
+    final auth = Provider.of<AuthModel>(context);
+    final res = await auth.ghClient.getJSON<List, List<GithubFilesItem>>(
+      '/repos/$owner/$name/pulls/$pullNumber/files?page=$page',
+      convert: (vs) => [for (var v in vs) GithubFilesItem.fromJson(v)],
+    );
+    return ListPayload(
+      cursor: page + 1,
+      items: res,
+      hasMore: res.isNotEmpty,
+    );
+  }
+
+  Widget build(BuildContext context) {
+    return ListStatefulScaffold<GithubFilesItem, int>(
+      title: AppBarTitle('Files'),
+      actionBuilder: () {
+        return ActionButton(
+          title: 'Actions',
+          items: [
+            ...ActionItem.getUrlActions(
+                'https://github.com/$owner/$name/pull/$pullNumber/files'),
+          ],
+        );
+      },
+      onRefresh: () => _query(context),
+      onLoadMore: (cursor) => _query(context, cursor),
+      itemBuilder: (v) {
+        return FilesItem(
+          filename: v.filename,
+          additions: v.additions,
+          deletions: v.deletions,
+          status: v.status,
+          changes: v.changes,
+          patch: v.patch,
+        );
+      },
+    );
+  }
+}

lib/screens/gh_issue.dart

@@ -587,7 +587,7 @@ fragment ReactableParts on Reactable {
                           ],
                         ),
                       ),
-                      url: 'https://github.com/$owner/$name/pull/$number/files',
+                      url: '/$owner/$name/pull/$number/files',
                     ),
                     CommonStyle.border,
                   ],

lib/widgets/files_item.dart

@@ -0,0 +1,61 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_highlight/flutter_highlight.dart';
+import 'package:git_touch/models/theme.dart';
+import 'package:git_touch/models/code.dart';
+import 'package:git_touch/utils/utils.dart';
+import 'package:provider/provider.dart';
+import 'package:flutter_highlight/theme_map.dart';
+
+class FilesItem extends StatelessWidget {
+  final String filename;
+  final String status;
+  final int changes;
+  final int additions;
+  final int deletions;
+  final String patch;
+
+  FilesItem({
+    @required this.filename,
+    @required this.status,
+    @required this.changes,
+    @required this.deletions,
+    @required this.additions,
+    @required this.patch,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Provider.of<ThemeModel>(context);
+    final codeProvider = Provider.of<CodeModel>(context);
+    return Card(
+      color: theme.palette.background,
+      margin: EdgeInsets.all(0),
+      child: ExpansionTile(
+        title: Text(
+          filename,
+          style: TextStyle(
+            color: theme.palette.primary,
+            fontSize: 18,
+            fontWeight: FontWeight.w600,
+          ),
+        ),
+        children: <Widget>[
+          SingleChildScrollView(
+            scrollDirection: Axis.horizontal,
+            child: HighlightView(
+              patch,
+              language: 'diff',
+              padding: CommonStyle.padding,
+              theme: themeMap[theme.brightness == Brightness.dark
+                  ? codeProvider.themeDark
+                  : codeProvider.theme],
+              textStyle: TextStyle(
+                  fontSize: codeProvider.fontSize.toDouble(),
+                  fontFamily: codeProvider.fontFamilyUsed),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}