feat: contributor screen (#64)

closes #53

lib/models/github.dart

@@ -301,3 +301,15 @@ class GithubContentReferenceItem {
   factory GithubContentReferenceItem.fromJson(Map<String, dynamic> json) =>
       _$GithubContentReferenceItemFromJson(json);
 }
+
+@JsonSerializable(fieldRename: FieldRename.snake)
+class GithubContributorItem {
+  int id;
+  String login;
+  String avatarUrl;
+  String htmlUrl;
+  int contributions;
+  GithubContributorItem();
+  factory GithubContributorItem.fromJson(Map<String, dynamic> json) =>
+      _$GithubContributorItemFromJson(json);
+}

lib/models/github.g.dart

@@ -108,7 +108,11 @@ GithubEventPayload _$GithubEventPayloadFromJson(Map<String, dynamic> json) {
     ..checkSuite = json['check_suite'] == null
         ? null
         : GithubCheckSuiteItem.fromJson(
-            json['check_suite'] as Map<String, dynamic>);
+            json['check_suite'] as Map<String, dynamic>)
+    ..contentReference = json['content_reference'] == null
+        ? null
+        : GithubContentReferenceItem.fromJson(
+            json['content_reference'] as Map<String, dynamic>);
 }
 
 Map<String, dynamic> _$GithubEventPayloadToJson(GithubEventPayload instance) =>
@@ -132,6 +136,7 @@ Map<String, dynamic> _$GithubEventPayloadToJson(GithubEventPayload instance) =>
       'installation': instance.installation,
       'check_run': instance.checkRun,
       'check_suite': instance.checkSuite,
+      'content_reference': instance.contentReference,
     };
 
 GithubEventIssue _$GithubEventIssueFromJson(Map<String, dynamic> json) {
@@ -415,3 +420,23 @@ Map<String, dynamic> _$GithubContentReferenceItemToJson(
       'id': instance.id,
       'reference': instance.reference,
     };
+
+GithubContributorItem _$GithubContributorItemFromJson(
+    Map<String, dynamic> json) {
+  return GithubContributorItem()
+    ..id = json['id'] as int
+    ..login = json['login'] as String
+    ..avatarUrl = json['avatar_url'] as String
+    ..htmlUrl = json['html_url'] as String
+    ..contributions = json['contributions'] as int;
+}
+
+Map<String, dynamic> _$GithubContributorItemToJson(
+        GithubContributorItem instance) =>
+    <String, dynamic>{
+      'id': instance.id,
+      'login': instance.login,
+      'avatar_url': instance.avatarUrl,
+      'html_url': instance.htmlUrl,
+      'contributions': instance.contributions,
+    };

lib/router.dart

@@ -5,6 +5,7 @@ import 'package:git_touch/screens/bb_repo.dart';
 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_org_repos.dart';
 import 'package:git_touch/screens/gl_commit.dart';
 import 'package:git_touch/screens/gl_starrers.dart';
@@ -71,6 +72,7 @@ class GithubRouter {
     GithubRouter.object,
     GithubRouter.stargazers,
     GithubRouter.watchers,
+    GithubRouter.contributors,
   ];
   static final user = RouterScreen('/:login', (_, p) {
     final login = p['login'].first;
@@ -135,6 +137,10 @@ class GithubRouter {
     return GhUsersScreen(p['owner'].first, UsersScreenType.watch,
         repoName: p['name'].first);
   });
+  static final contributors =
+      RouterScreen('/:owner/:name/contributors', (_, p) {
+    return GhContributorsScreen(p['owner'].first, p['name'].first);
+  });
 }
 
 class GitlabRouter {

lib/screens/gh_contributors.dart

@@ -0,0 +1,49 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:git_touch/models/github.dart';
+import 'package:git_touch/models/notification.dart';
+import 'package:git_touch/scaffolds/list_stateful.dart';
+import 'package:git_touch/utils/utils.dart';
+import 'package:git_touch/widgets/app_bar_title.dart';
+import 'package:git_touch/widgets/contributor_item.dart';
+import 'package:github/github.dart';
+import 'package:provider/provider.dart';
+import 'package:git_touch/widgets/event_item.dart';
+import 'package:git_touch/models/auth.dart';
+
+class GhContributorsScreen extends StatelessWidget {
+  final String owner;
+  final String name;
+  GhContributorsScreen(this.owner, this.name);
+
+  Future<ListPayload<GithubContributorItem, int>> _query(BuildContext context,
+      [int page = 1]) async {
+    final auth = Provider.of<AuthModel>(context);
+    final res = await auth.ghClient.getJSON<List, List<GithubContributorItem>>(
+      '/repos/$owner/$name/contributors?page=$page',
+      convert: (vs) => [for (var v in vs) GithubContributorItem.fromJson(v)],
+    );
+    return ListPayload(
+      cursor: page + 1,
+      items: res,
+      hasMore: res.isNotEmpty,
+    );
+  }
+
+  Widget build(BuildContext context) {
+    return ListStatefulScaffold<GithubContributorItem, int>(
+      title: AppBarTitle('Contributors'),
+      onRefresh: () => _query(context),
+      onLoadMore: (cursor) => _query(context, cursor),
+      itemBuilder: (v) {
+        final String login = v.login;
+        return ContributorItem(
+          avatarUrl: v.avatarUrl,
+          commits: v.contributions,
+          login: v.login,
+          url: '/$login?tab=contributors',
+        );
+      },
+    );
+  }
+}

lib/screens/gh_repo.dart

@@ -51,6 +51,14 @@ class GhRepoScreen extends StatelessWidget {
     }
   }
 
+  Future<String> _fetchContributors(BuildContext context) async {
+    final auth = Provider.of<AuthModel>(context);
+    final res = await auth.ghClient.getJSON(
+      '/repos/$owner/$name/stats/contributors',
+    );
+    return res.length.toString();
+  }
+
   Future<String> _fetchReadme(BuildContext context) async {
     try {
       final auth = Provider.of<AuthModel>(context);
@@ -67,14 +75,16 @@ class GhRepoScreen extends StatelessWidget {
   Widget build(BuildContext context) {
     final theme = Provider.of<ThemeModel>(context);
     final auth = Provider.of<AuthModel>(context);
-    return RefreshStatefulScaffold<Tuple2<GhRepoRepository, String>>(
+    return RefreshStatefulScaffold<Tuple3<GhRepoRepository, String, String>>(
       title: AppBarTitle('Repository'),
       fetchData: () async {
         final rs = await Future.wait([
           _query(context),
           _fetchReadme(context),
+          _fetchContributors(context),
         ]);
-        return Tuple2(rs[0] as GhRepoRepository, rs[1] as String);
+
+        return Tuple3(rs[0] as GhRepoRepository, rs[1] as String, rs[2]);
       },
       actionBuilder: (data, setState) {
         final repo = data.item1;
@@ -96,6 +106,7 @@ class GhRepoScreen extends StatelessWidget {
       bodyBuilder: (data, setState) {
         final repo = data.item1;
         final readme = data.item2;
+        final contributorsCount = data.item3;
         final ref = branch == null ? repo.defaultBranchRef : repo.ref;
         final license = repo.licenseInfo?.spdxId ?? repo.licenseInfo?.name;
 
@@ -321,6 +332,12 @@ class GhRepoScreen extends StatelessWidget {
                       },
                     ),
                 ],
+                TableViewItem(
+                  leftIconData: Octicons.organization,
+                  text: Text('Contributors'),
+                  rightWidget: Text(contributorsCount),
+                  url: '/$owner/$name/contributors',
+                )
               ],
             ),
             if (readme != null)

lib/widgets/contributor_item.dart

@@ -0,0 +1,66 @@
+import 'package:flutter/material.dart';
+import 'package:git_touch/models/theme.dart';
+import 'package:git_touch/utils/utils.dart';
+import 'package:git_touch/widgets/avatar.dart';
+import 'package:git_touch/widgets/link.dart';
+import 'package:provider/provider.dart';
+
+class ContributorItem extends StatelessWidget {
+  final String login;
+  final String avatarUrl;
+  final int commits;
+  final String url;
+
+  ContributorItem({
+    @required this.login,
+    @required this.avatarUrl,
+    @required this.commits,
+    @required this.url,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Provider.of<ThemeModel>(context);
+    return Link(
+      url: url,
+      child: Container(
+        padding: CommonStyle.padding,
+        child: Row(
+          children: <Widget>[
+            Avatar(url: avatarUrl, size: AvatarSize.large),
+            SizedBox(width: 10),
+            Expanded(
+              child: Column(
+                mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: <Widget>[
+                  Row(
+                    children: <Widget>[
+                      Text(
+                        login,
+                        style: TextStyle(
+                          color: theme.palette.primary,
+                          fontSize: 18,
+                          fontWeight: FontWeight.w600,
+                        ),
+                      ),
+                    ],
+                  ),
+                  SizedBox(height: 6),
+                  if (commits != null)
+                    DefaultTextStyle(
+                      style: TextStyle(
+                        color: theme.palette.secondaryText,
+                        fontSize: 16,
+                      ),
+                      child: Text("Commits: " + commits.toString()),
+                    ),
+                ],
+              ),
+            )
+          ],
+        ),
+      ),
+    );
+  }
+}