feat(gitlab): repository tree screen

lib/models/auth.dart

@@ -132,6 +132,11 @@ class AuthModel with ChangeNotifier {
     }
   }
 
+  Future<String> fetchWithGitlabToken(String p) async {
+    final res = await http.get(p, headers: {'Private-Token': token});
+    return res.body;
+  }
+
   Future fetchGitlab(String p) async {
     final res = await http.get(activeAccount.domain + '/api/v4' + p,
         headers: {'Private-Token': token});

lib/models/gitlab.dart

@@ -121,3 +121,14 @@ class GitlabProjectNamespace {
   factory GitlabProjectNamespace.fromJson(Map<String, dynamic> json) =>
       _$GitlabProjectNamespaceFromJson(json);
 }
+
+@JsonSerializable(fieldRename: FieldRename.snake)
+class GitlabTreeItem {
+  String type;
+  String path;
+
+  GitlabTreeItem();
+
+  factory GitlabTreeItem.fromJson(Map<String, dynamic> json) =>
+      _$GitlabTreeItemFromJson(json);
+}

lib/models/gitlab.g.dart

@@ -166,3 +166,15 @@ Map<String, dynamic> _$GitlabProjectNamespaceToJson(
       'id': instance.id,
       'name': instance.name,
     };
+
+GitlabTreeItem _$GitlabTreeItemFromJson(Map<String, dynamic> json) {
+  return GitlabTreeItem()
+    ..type = json['type'] as String
+    ..path = json['path'] as String;
+}
+
+Map<String, dynamic> _$GitlabTreeItemToJson(GitlabTreeItem instance) =>
+    <String, dynamic>{
+      'type': instance.type,
+      'path': instance.path,
+    };

lib/screens/gitlab_project.dart

@@ -3,6 +3,7 @@ import 'package:flutter/cupertino.dart';
 import 'package:git_touch/models/auth.dart';
 import 'package:git_touch/models/gitlab.dart';
 import 'package:git_touch/scaffolds/refresh_stateful.dart';
+import 'package:git_touch/screens/gitlab_tree.dart';
 import 'package:git_touch/utils/utils.dart';
 import 'package:git_touch/widgets/app_bar_title.dart';
 import 'package:git_touch/widgets/entry_item.dart';
@@ -115,7 +116,7 @@ class GitlabProjectScreen extends StatelessWidget {
                 TableViewItem(
                   leftIconData: Octicons.code,
                   text: Text('Code'),
-                  // screenBuilder: (_) => GitlabObjectScreen(),
+                  screenBuilder: (_) => GitlabTreeScreen(data.id),
                 ),
                 if (data.issuesEnabled)
                   TableViewItem(

lib/screens/gitlab_tree.dart

@@ -0,0 +1,73 @@
+import 'package:flutter/cupertino.dart';
+import 'package:git_touch/models/gitlab.dart';
+import 'package:git_touch/scaffolds/refresh_stateful.dart';
+import 'package:git_touch/widgets/app_bar_title.dart';
+import 'package:git_touch/widgets/table_view.dart';
+import 'package:flutter/material.dart';
+import 'package:git_touch/models/auth.dart';
+import 'package:provider/provider.dart';
+import 'package:git_touch/utils/utils.dart';
+import 'package:primer/primer.dart';
+import 'package:seti/seti.dart';
+
+class GitlabTreeScreen extends StatelessWidget {
+  final int id;
+  final List<String> paths;
+
+  GitlabTreeScreen(this.id, {this.paths = const []});
+
+  String get _path => paths.join('/');
+
+  static const _iconDefaultColor = PrimerColors.blue300;
+
+  Widget _buildIcon(GitlabTreeItem item) {
+    switch (item.type) {
+      case 'blob':
+        return SetiIcon(item.path, size: 36);
+      case 'tree':
+      case 'commit':
+        return Icon(
+          item.type == 'tree'
+              ? Octicons.file_directory
+              : Octicons.file_submodule,
+          color: _iconDefaultColor,
+          size: 24,
+        );
+      default:
+        return null;
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return RefreshStatefulScaffold<Iterable<GitlabTreeItem>>(
+      title: AppBarTitle(_path.isEmpty ? 'Files' : _path),
+      fetchData: () async {
+        var url = '/projects/$id/repository/tree';
+        if (paths.isNotEmpty) {
+          url += '?path=' + paths.join('/');
+        }
+        final res = await Provider.of<AuthModel>(context).fetchGitlab(url);
+        return (res as List).map((v) => GitlabTreeItem.fromJson(v));
+      },
+      bodyBuilder: (data, _) {
+        return TableView(
+          hasIcon: true,
+          items: data.map((item) {
+            return TableViewItem(
+              leftWidget: _buildIcon(item),
+              text: Text(item.path),
+              screenBuilder: (_) {
+                if (item.type == 'commit') return null;
+                return GitlabTreeScreen(
+                  id,
+                  paths: [...paths, item.path],
+                );
+              },
+            );
+          }),
+        );
+      },
+    );
+  }
+}