feat: create issue

lib/models/auth.dart

@@ -212,19 +212,32 @@ class AuthModel with ChangeNotifier {
         .timeout(_timeoutDuration);
   }
 
-  Future<void> putWithCredentials(String url,
-      {String contentType, String body}) async {
-    await http
-        .put(_apiPrefix + url, headers: _headers, body: body ?? {})
+  Future<http.Response> putWithCredentials(
+    String url, {
+    String contentType = 'application/json',
+    Map<String, dynamic> body = const {},
+  }) async {
+    return http
+        .put(
+          _apiPrefix + url,
+          headers: {..._headers, HttpHeaders.contentTypeHeader: contentType},
+          body: json.encode(body),
+        )
         .timeout(_timeoutDuration);
   }
 
-  Future<void> postWithCredentials(String url,
-      {String contentType, String body}) async {
-    final res = await http
-        .post(_apiPrefix + url, headers: _headers, body: body ?? {})
+  Future<http.Response> postWithCredentials(
+    String url, {
+    String contentType = 'application/json',
+    Map<String, dynamic> body = const {},
+  }) async {
+    return http
+        .post(
+          _apiPrefix + url,
+          headers: {..._headers, HttpHeaders.contentTypeHeader: contentType},
+          body: json.encode(body),
+        )
         .timeout(_timeoutDuration);
-    // print(res.body);
   }
 
   Future<void> deleteWithCredentials(String url) async {

lib/screens/issue_form.dart

@@ -0,0 +1,80 @@
+import 'dart:io';
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+import 'package:git_touch/models/auth.dart';
+import 'package:git_touch/models/theme.dart';
+import 'package:git_touch/scaffolds/common.dart';
+import 'package:git_touch/utils/utils.dart';
+import 'package:provider/provider.dart';
+
+class IssueFormScreen extends StatefulWidget {
+  final String owner;
+  final String name;
+
+  IssueFormScreen(this.owner, this.name);
+
+  @override
+  _IssueFormScreenState createState() => _IssueFormScreenState();
+}
+
+class _IssueFormScreenState extends State<IssueFormScreen> {
+  String get owner => widget.owner;
+  String get name => widget.name;
+
+  String _title = '';
+  String _body = '';
+
+  @override
+  Widget build(BuildContext context) {
+    return CommonScaffold(
+      title: Text('Submit an issue'),
+      body: Column(
+        children: <Widget>[
+          Padding(
+            padding: CommonStyle.padding,
+            child: CupertinoTextField(
+              placeholder: 'Title',
+              onChanged: (v) {
+                setState(() {
+                  _title = v;
+                });
+              },
+            ),
+          ),
+          Padding(
+            padding: CommonStyle.padding,
+            child: CupertinoTextField(
+              placeholder: 'Body',
+              onChanged: (v) {
+                setState(() {
+                  _body = v;
+                });
+              },
+            ),
+          ),
+          CupertinoButton(
+            child: Text('Submit'),
+            onPressed: () async {
+              try {
+                var res =
+                    await Provider.of<AuthModel>(context).postWithCredentials(
+                  '/repos/$owner/$name/issues',
+                  body: {'title': _title, 'body': _body},
+                );
+                if (res.statusCode != HttpStatus.created) {
+                  throw 'Create fail, response: ${res.body}';
+                }
+                await Provider.of<ThemeModel>(context)
+                    .showConfirm(context, 'Issue created');
+                Navigator.of(context).pop();
+              } catch (err) {
+                print(err); // TODO:
+              }
+            },
+          ),
+        ],
+      ),
+    );
+  }
+}

lib/screens/issues.dart

@@ -1,6 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:git_touch/models/auth.dart';
+import 'package:git_touch/models/theme.dart';
 import 'package:git_touch/scaffolds/list_stateful.dart';
+import 'package:git_touch/screens/issue_form.dart';
+import 'package:git_touch/widgets/action_entry.dart';
 import 'package:git_touch/widgets/app_bar_title.dart';
 import 'package:git_touch/widgets/issue_item.dart';
 import 'package:provider/provider.dart';
@@ -50,6 +53,13 @@ class IssuesScreen extends StatelessWidget {
   Widget build(BuildContext context) {
     return ListStatefulScaffold(
       title: AppBarTitle((isPullRequest ? 'Pull requests' : 'Issues')),
+      actionBuilder: () => ActionEntry(
+          iconData: Octicons.plus,
+          onTap: () {
+            Provider.of<ThemeModel>(context).pushRoute(
+                context, (_) => IssueFormScreen(owner, name),
+                fullscreenDialog: true);
+          }),
       onRefresh: () => _query(context),
       onLoadMore: (cursor) => _query(context, cursor),
       itemBuilder: (payload) =>