GitHost AutoConfigure: Handle errors a bit better

lib/apis/githost.dart

@@ -20,3 +20,16 @@ class GitRepo {
     return 'GitRepo{fulleName: $fullName, cloneUrl: $cloneUrl}';
   }
 }
+
+class GitHostException implements Exception {
+  static const OAuthFailed = const GitHostException("OAuthFailed");
+  static const RepoExists = const GitHostException("RepoExists");
+
+  final String cause;
+  const GitHostException(this.cause);
+
+  @override
+  String toString() {
+    return "GitHostException: " + cause;
+  }
+}

lib/apis/github.dart

@@ -30,7 +30,7 @@ class GitHub implements GitHost {
       var authCode = uri.queryParameters['code'];
       if (authCode == null) {
         print("GitHub: Missing auth code. Now what?");
-        callback();
+        throw GitHostException.OAuthFailed;
       }
 
       this._accessCode = await _getAccessCode(authCode);
@@ -51,7 +51,7 @@ class GitHub implements GitHost {
           response.statusCode.toString() +
           ": " +
           response.body);
-      return null;
+      throw GitHostException.OAuthFailed;
     }
     print("GithubResponse: " + response.body);
 

lib/apis/gitlab.dart

@@ -27,19 +27,21 @@ class GitLab implements GitHost {
 
       print("GitLab: Called onUrl with " + call.arguments.toString());
 
-      var url = call.arguments["URL"];
-      var uri = Uri.parse(url);
+      String url = call.arguments["URL"];
+      var queryParamters = url.substring(url.indexOf('#') + 1);
+      var map = Uri.splitQueryString(queryParamters);
 
-      var state = uri.queryParameters['state'];
+      var state = map['state'];
       if (state != _stateOAuth) {
         print("GitLab: OAuth State incorrect");
-        callback();
+        print("Required State: " + _stateOAuth);
+        print("Actual State: " + state);
+        throw GitHostException.OAuthFailed;
       }
 
-      _accessCode = uri.queryParameters['access_token'];
+      _accessCode = map['access_token'];
       if (_accessCode == null) {
-        print("GitLab: Missing access code. Now what?");
-        callback();
+        throw GitHostException.OAuthFailed;
       }
 
       callback();

lib/screens/githostsetup_autoconfigure.dart

@@ -19,40 +19,74 @@ class GitHostSetupAutoConfigure extends StatefulWidget {
 
 class GitHostSetupAutoConfigureState extends State<GitHostSetupAutoConfigure> {
   GitHost gitHost;
+  String errorMessage = "";
 
   @override
   void initState() {
     super.initState();
 
+    print("Starting autoconfigure");
     gitHost = createGitHost(widget.gitHostType);
-    gitHost.init(() async {
-      print("GitHub Initalized");
+    try {
+      gitHost.init(() async {
+        print("GitHost Initalized: " + widget.gitHostType.toString());
 
-      var repo = await gitHost.createRepo("journal");
-      var publicKey = await generateSSHKeys(comment: "GitJournal");
-      await gitHost.addDeployKey(publicKey, repo.fullName);
+        var repo = await gitHost.createRepo("journal");
+        var publicKey = await generateSSHKeys(comment: "GitJournal");
+        await gitHost.addDeployKey(publicKey, repo.fullName);
 
-      widget.onDone(repo.cloneUrl);
-    });
-    gitHost.launchOAuthScreen();
+        widget.onDone(repo.cloneUrl);
+      });
+      gitHost.launchOAuthScreen();
+    } on GitHostException catch (e) {
+      print("GitHostSetupAutoConfigur: " + e.toString());
+      setState(() {
+        errorMessage = widget.gitHostType.toString() + ": " + e.toString();
+      });
+    }
   }
 
   @override
   Widget build(BuildContext context) {
-    var children = <Widget>[
-      Text(
-        'Configuring ...',
-        textAlign: TextAlign.center,
-        style: Theme.of(context).textTheme.display1,
-      ),
-      SizedBox(height: 8.0),
-      Padding(
-        padding: const EdgeInsets.all(8.0),
-        child: CircularProgressIndicator(
-          value: null,
+    var children = <Widget>[];
+    if (this.errorMessage == null || this.errorMessage.isEmpty) {
+      children = <Widget>[
+        Padding(
+          padding: const EdgeInsets.all(8.0),
+          child: Text(
+            'Configuring ...',
+            textAlign: TextAlign.center,
+            style: Theme.of(context).textTheme.display1,
+          ),
         ),
-      ),
-    ];
+        SizedBox(height: 8.0),
+        Padding(
+          padding: const EdgeInsets.all(8.0),
+          child: CircularProgressIndicator(
+            value: null,
+          ),
+        ),
+      ];
+    } else {
+      children = <Widget>[
+        Padding(
+          padding: const EdgeInsets.all(8.0),
+          child: Text(
+            'Failed',
+            textAlign: TextAlign.center,
+            style: Theme.of(context).textTheme.display1,
+          ),
+        ),
+        Padding(
+          padding: const EdgeInsets.all(8.0),
+          child: Text(
+            this.errorMessage,
+            textAlign: TextAlign.center,
+            style: Theme.of(context).textTheme.display1,
+          ),
+        ),
+      ];
+    }
 
     return Column(
       mainAxisAlignment: MainAxisAlignment.center,