feat(gl): add starrers screen

closes #48

lib/models/gitlab.dart

@@ -201,3 +201,12 @@ class GitlabIssue {
   factory GitlabIssue.fromJson(Map<String, dynamic> json) =>
       _$GitlabIssueFromJson(json);
 }
+
+@JsonSerializable(fieldRename: FieldRename.snake)
+class GitlabStarrer {
+  DateTime starredSince;
+  GitlabUser user;
+  GitlabStarrer();
+  factory GitlabStarrer.fromJson(Map<String, dynamic> json) =>
+      _$GitlabStarrerFromJson(json);
+}

lib/models/gitlab.g.dart

@@ -348,3 +348,19 @@ Map<String, dynamic> _$GitlabIssueToJson(GitlabIssue instance) =>
       'updated_at': instance.updatedAt?.toIso8601String(),
       'labels': instance.labels,
     };
+
+GitlabStarrer _$GitlabStarrerFromJson(Map<String, dynamic> json) {
+  return GitlabStarrer()
+    ..starredSince = json['starred_since'] == null
+        ? null
+        : DateTime.parse(json['starred_since'] as String)
+    ..user = json['user'] == null
+        ? null
+        : GitlabUser.fromJson(json['user'] as Map<String, dynamic>);
+}
+
+Map<String, dynamic> _$GitlabStarrerToJson(GitlabStarrer instance) =>
+    <String, dynamic>{
+      'starred_since': instance.starredSince?.toIso8601String(),
+      'user': instance.user,
+    };

lib/router.dart

@@ -7,6 +7,7 @@ import 'package:git_touch/screens/code_theme.dart';
 import 'package:git_touch/screens/gh_commits.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';
 import 'package:git_touch/screens/gt_commits.dart';
 import 'package:git_touch/screens/gt_issues.dart';
 import 'package:git_touch/screens/gt_object.dart';
@@ -144,6 +145,7 @@ class GitlabRouter {
     GitlabRouter.blob,
     GitlabRouter.tree,
     GitlabRouter.project,
+    GitlabRouter.starrers,
     GitlabRouter.issues,
     GitlabRouter.mergeRequests,
     GitlabRouter.commits,
@@ -168,6 +170,8 @@ class GitlabRouter {
           path: params['path']?.first));
   static final project = RouterScreen('/projects/:id',
       (context, params) => GlProjectScreen(int.parse(params['id'].first)));
+  static final starrers = RouterScreen('/projects/:id/starrers',
+      (context, params) => GlStarrersScreen(int.parse(params['id'].first)));
   static final issues = RouterScreen(
       '/projects/:id/issues',
       (context, params) => GlIssuesScreen(

lib/screens/gl_project.dart

@@ -96,6 +96,7 @@ class GlProjectScreen extends StatelessWidget {
                 EntryItem(
                   count: p.starCount,
                   text: 'Stars',
+                  url: '/gitlab/projects/$id/starrers',
                 ),
                 EntryItem(
                   count: p.forksCount,

lib/screens/gl_starrers.dart

@@ -0,0 +1,44 @@
+import 'package:flutter/material.dart';
+import 'package:git_touch/models/auth.dart';
+import 'package:git_touch/models/gitlab.dart';
+import 'package:git_touch/scaffolds/list_stateful.dart';
+import 'package:git_touch/widgets/app_bar_title.dart';
+import 'package:git_touch/widgets/user_item.dart';
+import 'package:provider/provider.dart';
+import 'package:timeago/timeago.dart' as timeago;
+
+class GlStarrersScreen extends StatelessWidget {
+  final int id;
+  GlStarrersScreen(this.id);
+
+  Future<ListPayload<GitlabStarrer, int>> _query(BuildContext context,
+      [int page = 1]) async {
+    final auth = Provider.of<AuthModel>(context);
+    final res =
+        await auth.fetchGitlabWithPage('/projects/$id/starrers?page=$page');
+    return ListPayload(
+      cursor: res.cursor,
+      hasMore: res.hasMore,
+      items: <GitlabStarrer>[
+        for (var v in res.data) GitlabStarrer.fromJson(v),
+      ],
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return ListStatefulScaffold<GitlabStarrer, int>(
+      title: AppBarTitle('Members'),
+      onRefresh: () => _query(context),
+      onLoadMore: (page) => _query(context, page),
+      itemBuilder: (v) {
+        return UserItem(
+          avatarUrl: v.user.avatarUrl,
+          login: v.user.username,
+          bio: Text('Starred ' + timeago.format(v.starredSince)),
+          url: '/gitlab/user/${v.user.id}',
+        );
+      },
+    );
+  }
+}