feat: add files and commits links for repo screen

lib/screens/repo.dart

@@ -48,6 +48,10 @@ class _RepoScreenState extends State<RepoScreen> {
     pullRequests(states: OPEN) {
       totalCount
     }
+    url
+    defaultBranchRef {
+      name
+    }
   }
 }
 
@@ -106,6 +110,16 @@ class _RepoScreenState extends State<RepoScreen> {
                           isPullRequest: true,
                         ),
                   ),
+                  EntryItem(
+                    text: 'Files',
+                    url: payload['url'] + '?files=1',
+                  ),
+                  EntryItem(
+                    text: 'Commits',
+                    url: payload['url'] +
+                        '/commits/' +
+                        payload['defaultBranchRef']['name'],
+                  ),
                 ],
               ),
             ),

lib/utils/constants.dart

@@ -1,3 +1,6 @@
-// These keys are for development
+// These keys are for development, not the production keys
+// You can also create OAuth App at https://github.com/settings/applications/new
+// to get your own keys and replace these ones
+
 var clientId = '9b7d1cc04a1db5710767';
 var clientSecret = '710e085908dde6a8b55f7a9dc447ad5c0c5617d1';

lib/widgets/entry_item.dart

@@ -5,8 +5,9 @@ class EntryItem extends StatelessWidget {
   final int count;
   final String text;
   final WidgetBuilder screenBuilder;
+  final String url;
 
-  EntryItem({this.count, this.text, this.screenBuilder});
+  EntryItem({this.count, this.text, this.screenBuilder, this.url});
 
   @override
   Widget build(BuildContext context) {
@@ -17,12 +18,14 @@ class EntryItem extends StatelessWidget {
           padding: EdgeInsets.symmetric(vertical: 10),
           child: Column(
             children: <Widget>[
-              Text(count.toString(), style: TextStyle(fontSize: 18)),
+              Text(count == null ? '' : count.toString(),
+                  style: TextStyle(fontSize: 18)),
               Text(text, style: TextStyle(fontSize: 13))
             ],
           ),
         ),
         screenBuilder: screenBuilder,
+        url: url,
       ),
     );
   }

lib/widgets/link.dart

@@ -1,9 +1,11 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/cupertino.dart';
+import 'package:url_launcher/url_launcher.dart';
 import '../providers/settings.dart';
 
 class Link extends StatelessWidget {
   final Widget child;
+  final String url;
   final WidgetBuilder screenBuilder;
   final Function beforeRedirect;
   final Color bgColor;
@@ -13,13 +15,15 @@ class Link extends StatelessWidget {
 
   Link({
     this.child,
+    this.url,
     this.screenBuilder,
     this.beforeRedirect,
     this.bgColor,
     this.material = true,
     this.fullscreenDialog = false,
     this.iconButton,
-  }) : assert(child != null || iconButton != null);
+  })  : assert(child != null || iconButton != null),
+        assert(screenBuilder == null || url == null);
 
   void _onTap(BuildContext context, int theme) {
     if (beforeRedirect != null) {
@@ -41,6 +45,10 @@ class Link extends StatelessWidget {
           ));
       }
     }
+
+    if (url != null) {
+      launch(url);
+    }
   }
 
   @override