refactor: fix null types

lib/models/auth.dart

@@ -688,18 +688,15 @@ class AuthModel with ChangeNotifier {
   // var _timeoutDuration = Duration(seconds: 1);
 
   GitHub? _ghClient;
-  GitHub? get ghClient {
+  GitHub get ghClient {
-    if (token == null) return null;
     if (_ghClient == null) {
       _ghClient = GitHub(auth: Authentication.withToken(token));
     }
-    return _ghClient;
+    return _ghClient!;
   }
 
   Client? _gqlClient;
-  Client? get gqlClient {
+  Client get gqlClient {
-    if (token == null) return null;
-
     if (_gqlClient == null) {
       _gqlClient = Client(
         link: HttpLink(
@@ -710,16 +707,13 @@ class AuthModel with ChangeNotifier {
       );
     }
 
-    return _gqlClient;
+    return _gqlClient!;
   }
 
   Future<dynamic> query(String query, [String? _token]) async {
     if (_token == null) {
       _token = token;
     }
-    if (_token == null) {
-      throw 'token is null';
-    }
 
     final res = await http
         .post(Uri.parse(_apiPrefix + '/graphql'),

lib/screens/gh_commits.dart

@@ -43,7 +43,7 @@ class GhCommits extends StatelessWidget {
           b.vars.after = cursor;
         });
         final OperationResponse<GCommitsData, GCommitsVars?> res =
-            await context.read<AuthModel>().gqlClient!.request(req).first;
+            await context.read<AuthModel>().gqlClient.request(req).first;
         final ref = res.data!.repository!.defaultBranchRef ??
             res.data!.repository!.ref!;
         final history = (ref.target as GCommitsRefCommit).history;

lib/screens/gh_compare.dart

@@ -20,7 +20,7 @@ class GhComparisonScreen extends StatelessWidget {
     return RefreshStatefulScaffold(
       title: AppBarTitle(AppLocalizations.of(context)!.files),
       fetch: () async {
-        final res = await context.read<AuthModel>().ghClient!.getJSON(
+        final res = await context.read<AuthModel>().ghClient.getJSON(
             '/repos/$owner/$name/compare/$before...$head',
             convert: (dynamic vs) => GithubComparisonItem.fromJson(vs));
         return res.files;

lib/screens/gh_contributors.dart

@@ -20,7 +20,7 @@ class GhContributorsScreen extends StatelessWidget {
         page = page ?? 1;
         final res = await context
             .read<AuthModel>()
-            .ghClient!
+            .ghClient
             .getJSON<List, List<GithubContributorItem>>(
               '/repos/$owner/$name/contributors?page=$page',
               convert: (vs) =>

lib/screens/gh_events.dart

@@ -20,7 +20,7 @@ class GhEventsScreen extends StatelessWidget {
       itemBuilder: (payload) => EventItem(payload),
       fetch: (page) async {
         page = page ?? 1;
-        final events = await context.read<AuthModel>().ghClient!.getJSON(
+        final events = await context.read<AuthModel>().ghClient.getJSON(
             '/users/$login/events?page=$page&per_page=$PAGE_SIZE',
             convert: (dynamic vs) =>
                 [for (var v in vs) GithubEvent.fromJson(v)]);

lib/screens/gh_files.dart

@@ -31,7 +31,7 @@ class GhFilesScreen extends StatelessWidget {
         page = page ?? 1;
         final res = await context
             .read<AuthModel>()
-            .ghClient!
+            .ghClient
             .getJSON<List, List<GithubFilesItem>>(
               '/repos/$owner/$name/pulls/$pullNumber/files?page=$page',
               convert: (vs) => [for (var v in vs) GithubFilesItem.fromJson(v)],

lib/screens/gh_gists.dart

@@ -24,7 +24,7 @@ class GhGistsScreen extends StatelessWidget {
           ..vars.login = login
           ..vars.after = page);
         final OperationResponse<GGistsData, GGistsVars?> res =
-            await context.read<AuthModel>().gqlClient!.request(req).first;
+            await context.read<AuthModel>().gqlClient.request(req).first;
         final gists = res.data!.user!.gists;
         return ListPayload(
           cursor: gists.pageInfo.endCursor,

lib/screens/gh_gists_files.dart

@@ -26,7 +26,7 @@ class GhGistsFilesScreen extends StatelessWidget {
           ..vars.login = login
           ..vars.name = id);
         final OperationResponse<GGistData, GGistVars?> res =
-            await context.read<AuthModel>().gqlClient!.request(req).first;
+            await context.read<AuthModel>().gqlClient.request(req).first;
         final gist = res.data!.user!.gist;
         return gist;
       },

lib/screens/gh_issue.dart

@@ -96,7 +96,7 @@ class GhIssueScreen extends StatelessWidget {
       b.vars.cursor = cursor;
     });
     OperationResponse<GIssueData, GIssueVars?> res =
-        await context.read<AuthModel>().gqlClient!.request(req).first;
+        await context.read<AuthModel>().gqlClient.request(req).first;
     return res.data!.repository!;
   }
 
@@ -115,7 +115,7 @@ class GhIssueScreen extends StatelessWidget {
                 ActionItem(
                   text: d.closed ? 'Reopen issue' : 'Close issue',
                   onTap: (_) async {
-                    await context.read<AuthModel>().ghClient!.issues.edit(
+                    await context.read<AuthModel>().ghClient.issues.edit(
                         github.RepositorySlug(owner, name),
                         number,
                         github.IssueRequest(

lib/screens/gh_issue_form.dart

@@ -59,7 +59,7 @@ class _GhIssueFormScreenState extends State<GhIssueFormScreen> {
               final slug = RepositorySlug(widget.owner, widget.name);
               final res = await context
                   .read<AuthModel>()
-                  .ghClient!
+                  .ghClient
                   .issues
                   .create(slug, IssueRequest(title: _title, body: _body));
               await theme.push(

lib/screens/gh_issues.dart

@@ -33,7 +33,7 @@ class GhIssuesScreen extends StatelessWidget {
           b.vars.cursor = cursor;
         });
         final OperationResponse<GIssuesData, GIssuesVars?> res =
-            await context.read<AuthModel>().gqlClient!.request(req).first;
+            await context.read<AuthModel>().gqlClient.request(req).first;
         final issues = res.data!.repository!.issues;
         return ListPayload(
           cursor: issues.pageInfo.endCursor,

lib/screens/gh_news.dart

@@ -24,7 +24,7 @@ class GhNewsScreenState extends State<GhNewsScreen> {
       // 1 item is enough since count is not displayed for now.
       var items = await context
           .read<AuthModel>()
-          .ghClient!
+          .ghClient
           .getJSON('/notifications?per_page=1');
 
       if (items is List && items.isNotEmpty) {
@@ -43,7 +43,7 @@ class GhNewsScreenState extends State<GhNewsScreen> {
         final auth = context.read<AuthModel>();
         final login = auth.activeAccount!.login;
 
-        final events = await auth.ghClient!.getJSON(
+        final events = await auth.ghClient.getJSON(
           '/users/$login/received_events?page=$page&per_page=$PAGE_SIZE',
           convert: (dynamic vs) => [for (var v in vs) GithubEvent.fromJson(v)],
         );

lib/screens/gh_notification.dart

@@ -21,7 +21,7 @@ class GhNotificationScreen extends StatefulWidget {
 
 class GhNotificationScreenState extends State<GhNotificationScreen> {
   Future<Map<String, NotificationGroup>> fetchNotifications(int index) async {
-    final ns = await context.read<AuthModel>().ghClient!.getJSON(
+    final ns = await context.read<AuthModel>().ghClient.getJSON(
           '/notifications?all=${index == 2}&participating=${index == 1}',
           convert: (dynamic vs) =>
               [for (var v in vs) GithubNotificationItem.fromJson(v)],
@@ -123,7 +123,7 @@ ${item.key}: pullRequest(number: ${item.subject!.number}) {
             onTap: () async {
               await context
                   .read<AuthModel>()
-                  .ghClient!
+                  .ghClient
                   .activity
                   .markRepositoryNotificationsRead(
                       RepositorySlug.full(group.fullName!));

lib/screens/gh_object.dart

@@ -37,7 +37,7 @@ class GhObjectScreen extends StatelessWidget {
         final suffix = path == null ? '' : '/$path';
         final res = await context
             .read<AuthModel>()
-            .ghClient!
+            .ghClient
             .repositories
             .getContents(RepositorySlug(owner, name), suffix, ref: ref);
         if (res.isDirectory) {

lib/screens/gh_org_repos.dart

@@ -25,7 +25,7 @@ class GhOrgReposScreen extends StatelessWidget {
         page = page ?? 1;
         final rs = await context
             .read<AuthModel>()
-            .ghClient!
+            .ghClient
             .getJSON<List, List<Repository>>(
               '/orgs/$owner/repos?sort=updated&page=$page',
               convert: (vs) => [for (var v in vs) Repository.fromJson(v)],

lib/screens/gh_orgs.dart

@@ -19,7 +19,7 @@ class GhUserOrganizationScreen extends StatelessWidget {
         page = page ?? 1;
         final res = await context
             .read<AuthModel>()
-            .ghClient!
+            .ghClient
             .getJSON<List, List<GithubUserOrganizationItem>>(
               '/users/$login/orgs?page=$page',
               convert: (vs) =>

lib/screens/gh_pulls.dart

@@ -28,7 +28,7 @@ class GhPullsScreen extends StatelessWidget {
           b.vars.cursor = cursor;
         });
         final OperationResponse<GPullsData, GPullsVars?> res =
-            await context.read<AuthModel>().gqlClient!.request(req).first;
+            await context.read<AuthModel>().gqlClient.request(req).first;
         final pulls = res.data!.repository!.pullRequests;
         return ListPayload(
           cursor: pulls.pageInfo.endCursor,

lib/screens/gh_releases.dart

@@ -26,7 +26,7 @@ class GhReleasesScreen extends StatelessWidget {
           ..vars.name = name
           ..vars.cursor = page);
         final OperationResponse<GReleasesData, GReleasesVars?> res =
-            await context.read<AuthModel>().gqlClient!.request(req).first;
+            await context.read<AuthModel>().gqlClient.request(req).first;
         final releases = res.data!.repository!.releases;
         return ListPayload(
           cursor: releases.pageInfo.endCursor,

lib/screens/gh_repo.dart

@@ -57,10 +57,10 @@ class GhRepoScreen extends StatelessWidget {
           ..vars.branchSpecified = branch != null
           ..vars.branch = branch ?? '');
         final OperationResponse<GRepoData, GRepoVars?> res =
-            await context.read<AuthModel>().gqlClient!.request(req).first;
+            await context.read<AuthModel>().gqlClient.request(req).first;
         final repo = res.data!.repository;
 
-        final ghClient = context.read<AuthModel>().ghClient!;
+        final ghClient = context.read<AuthModel>().ghClient;
         final countFuture = ghClient
             .getJSON('/repos/$owner/$name/stats/contributors')
             .then((v) => (v as List).length);
@@ -132,10 +132,8 @@ class GhRepoScreen extends StatelessWidget {
                             ActionItem(
                               text: _buildWatchState(v),
                               onTap: (_) async {
-                                final activityApi = context
+                                final activityApi =
-                                    .read<AuthModel>()
+                                    context.read<AuthModel>().ghClient.activity;
-                                    .ghClient!
-                                    .activity;
                                 switch (v) {
                                   case GSubscriptionState.SUBSCRIBED:
                                   case GSubscriptionState.IGNORED:
@@ -173,7 +171,7 @@ class GhRepoScreen extends StatelessWidget {
                       text: repo.viewerHasStarred ? 'Unstar' : 'Star',
                       onTap: () async {
                         final activityApi =
-                            context.read<AuthModel>().ghClient!.activity;
+                            context.read<AuthModel>().ghClient.activity;
                         if (repo.viewerHasStarred) {
                           await activityApi.unstar(
                               RepositorySlug(repo.owner.login, repo.name));

lib/screens/gh_repos.dart

@@ -25,7 +25,7 @@ class GhRepos extends StatelessWidget {
           b.vars.after = cursor;
         });
         final OperationResponse<GReposData, GReposVars?> res =
-            await auth.gqlClient!.request(req).first;
+            await auth.gqlClient.request(req).first;
         final p = res.data!.user!.repositories;
         return ListPayload(
           cursor: p.pageInfo.endCursor,
@@ -56,7 +56,7 @@ class GhStars extends StatelessWidget {
           b.vars.after = cursor;
         });
         final OperationResponse<GStarsData, GStarsVars?> res =
-            await auth.gqlClient!.request(req).first;
+            await auth.gqlClient.request(req).first;
         final p = res.data!.user!.starredRepositories;
         return ListPayload(
           cursor: p.pageInfo.endCursor,

lib/screens/gh_user.dart

@@ -272,7 +272,7 @@ class GhViewer extends StatelessWidget {
       fetch: () async {
         final req = GViewerReq();
         final OperationResponse<GViewerData, GViewerVars?> res =
-            await auth.gqlClient!.request(req).first;
+            await auth.gqlClient.request(req).first;
         return res.data!.viewer;
       },
       title: AppBarTitle(AppLocalizations.of(context)!.me),
@@ -298,7 +298,7 @@ class GhUser extends StatelessWidget {
       fetch: () async {
         final req = GUserReq((b) => b..vars.login = login);
         final OperationResponse<GUserData, GUserVars?> res =
-            await auth.gqlClient!.request(req).first;
+            await auth.gqlClient.request(req).first;
         return res.data;
       },
       title: AppBarTitle(login),
@@ -322,9 +322,9 @@ class GhUser extends StatelessWidget {
                       : AppLocalizations.of(context)!.follow,
                   onTap: () async {
                     if (p.viewerIsFollowing) {
-                      await auth.ghClient!.users.unfollowUser(p.login);
+                      await auth.ghClient.users.unfollowUser(p.login);
                     } else {
-                      await auth.ghClient!.users.followUser(p.login);
+                      await auth.ghClient.users.followUser(p.login);
                     }
                     setData(data.rebuild((b) {
                       final u = b.repositoryOwner

lib/screens/gh_users.dart

@@ -24,7 +24,7 @@ class GhFollowers extends StatelessWidget {
           b.vars.after = cursor;
         });
         final OperationResponse<GFollowersData, GFollowersVars?> res =
-            await auth.gqlClient!.request(req).first;
+            await auth.gqlClient.request(req).first;
         final p = res.data!.user!.followers;
         return ListPayload(
           cursor: p.pageInfo.endCursor,
@@ -54,7 +54,7 @@ class GhFollowing extends StatelessWidget {
           b.vars.after = cursor;
         });
         final OperationResponse<GFollowingData, GFollowingVars?> res =
-            await auth.gqlClient!.request(req).first;
+            await auth.gqlClient.request(req).first;
         final p = res.data!.user!.following;
         return ListPayload(
           cursor: p.pageInfo.endCursor,
@@ -84,7 +84,7 @@ class GhMembers extends StatelessWidget {
           b.vars.after = cursor;
         });
         final OperationResponse<GMembersData, GMembersVars?> res =
-            await auth.gqlClient!.request(req).first;
+            await auth.gqlClient.request(req).first;
         final p = res.data!.organization!.membersWithRole;
         return ListPayload(
           cursor: p.pageInfo.endCursor,
@@ -116,7 +116,7 @@ class GhWachers extends StatelessWidget {
           b.vars.after = cursor;
         });
         final OperationResponse<GWatchersData, GWatchersVars?> res =
-            await auth.gqlClient!.request(req).first;
+            await auth.gqlClient.request(req).first;
         final p = res.data!.repository!.watchers;
         return ListPayload(
           cursor: p.pageInfo.endCursor,
@@ -148,7 +148,7 @@ class GhStargazers extends StatelessWidget {
           b.vars.after = cursor;
         });
         final OperationResponse<GStargazersData, GStargazersVars?> res =
-            await auth.gqlClient!.request(req).first;
+            await auth.gqlClient.request(req).first;
         final p = res.data!.repository!.stargazers;
         return ListPayload(
           cursor: p.pageInfo.endCursor,

lib/screens/go_user.dart

@@ -44,62 +44,58 @@ class GoUserScreen extends StatelessWidget {
       bodyBuilder: (p, _) {
         final user = p.item1;
         final repos = p.item2;
-        if (p.item1 != null) {
+        return Column(
-          return Column(
+          children: <Widget>[
-            children: <Widget>[
+            UserHeader(
-              UserHeader(
+              login: user.username,
-                login: user.username,
+              avatarUrl: user.avatarUrl,
-                avatarUrl: user.avatarUrl,
+              name: user.fullName,
-                name: user.fullName,
+              createdAt:
-                createdAt:
+                  null, // TODO: API response does not have this attribute
-                    null, // TODO: API response does not have this attribute
+              isViewer: isViewer,
-                isViewer: isViewer,
+              bio: null, // TODO: API response does not have this attribute
-                bio: null, // TODO: API response does not have this attribute
+            ),
+            CommonStyle.border,
+            Row(children: [
+              EntryItem(
+                text: 'Repositories',
+                url: '/gogs/$login?tab=repositories&isViewer=$isViewer',
               ),
-              CommonStyle.border,
+              EntryItem(
-              Row(children: [
+                text: 'Followers',
-                EntryItem(
+                url: '/gogs/$login?tab=followers',
-                  text: 'Repositories',
+              ),
-                  url: '/gogs/$login?tab=repositories&isViewer=$isViewer',
+              EntryItem(
+                text: 'Following',
+                url: '/gogs/$login?tab=following',
+              ),
+            ]),
+            CommonStyle.border,
+            TableView(
+              items: [
+                TableViewItem(
+                  leftIconData: Octicons.home,
+                  text: Text('Organizations'),
+                  url:
+                      '/gogs/${user.username}?tab=organizations&isViewer=$isViewer',
                 ),
-                EntryItem(
+              ],
-                  text: 'Followers',
+            ),
-                  url: '/gogs/$login?tab=followers',
+            CommonStyle.border,
-                ),
+            Column(
-                EntryItem(
+              children: <Widget>[
-                  text: 'Following',
+                for (var v in repos) ...[
-                  url: '/gogs/$login?tab=following',
+                  RepositoryItem.go(
-                ),
+                    payload: v,
-              ]),
+                    name: v.fullName!.split('/')[1],
-              CommonStyle.border,
+                    owner: v.owner!.username,
-              TableView(
-                items: [
-                  TableViewItem(
-                    leftIconData: Octicons.home,
-                    text: Text('Organizations'),
-                    url:
-                        '/gogs/${user.username}?tab=organizations&isViewer=$isViewer',
                   ),
-                ],
+                  CommonStyle.border,
-              ),
+                ]
-              CommonStyle.border,
+              ],
-              Column(
+            ),
-                children: <Widget>[
+          ],
-                  for (var v in repos) ...[
+        );
-                    RepositoryItem.go(
-                      payload: v,
-                      name: v.fullName!.split('/')[1],
-                      owner: v.owner!.username,
-                    ),
-                    CommonStyle.border,
-                  ]
-                ],
-              ),
-            ],
-          );
-        } else {
-          return Text('404'); // TODO:
-        }
       },
     );
   }

lib/widgets/notification_item.dart

@@ -83,7 +83,7 @@ class _NotificationItemState extends State<NotificationItem> {
       try {
         await context
             .read<AuthModel>()
-            .ghClient!
+            .ghClient
             .activity
             .markThreadRead(payload.id!);
         widget.markAsRead();