Add API for GitLab

It's so awesome that I don't need to store the client secret with
GitLab. The GitHub APIs are so much easier to use + documentation, but
at least GitLab supports more OAuth methods.

lib/apis/gitlab.dart

@@ -0,0 +1,179 @@
+import 'dart:async';
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:http/http.dart' as http;
+import 'package:flutter/services.dart';
+
+import 'package:url_launcher/url_launcher.dart';
+
+import 'dart:math';
+
+String _randomString(int length) {
+  var rand = new Random();
+  var codeUnits = new List.generate(length, (index) {
+    return rand.nextInt(33) + 89;
+  });
+
+  return new String.fromCharCodes(codeUnits);
+}
+
+class Gitlab {
+  static const _clientID =
+      "faf33c3716faf05bfb701b1b31e36c83a23c3ec2d7161f4ff00fba2275524d09";
+
+  var _platform = const MethodChannel('gitjournal.io/git');
+  var _accessCode = "";
+  var _stateOAuth = "";
+
+  void init(Function callback) {
+    Future _handleMessages(MethodCall call) async {
+      if (call.method != "onURL") {
+        print("GitLab Unknown Call: " + call.method);
+        return;
+      }
+
+      print("GitLab: Called onUrl with " + call.arguments.toString());
+
+      var url = call.arguments["URL"];
+      var uri = Uri.parse(url);
+
+      var state = uri.queryParameters['state'];
+      if (state != _stateOAuth) {
+        print("GitLab: OAuth State incorrect");
+        callback();
+      }
+
+      _accessCode = uri.queryParameters['access_token'];
+      if (_accessCode == null) {
+        print("GitLab: Missing access code. Now what?");
+        callback();
+      }
+
+      callback();
+    }
+
+    _platform.setMethodCallHandler(_handleMessages);
+    print("GitLab: Installed Handler");
+  }
+
+  Future launchOAuthScreen() async {
+    _stateOAuth = _randomString(10);
+
+    var url =
+        "https://gitlab.com/oauth/authorize?client_id=$_clientID&response_type=token&state=$_stateOAuth&redirect_uri=gitjournal://login.oauth2";
+    return launch(url);
+  }
+
+  Future<List<GitLabRepo>> listRepos() async {
+    if (_accessCode.isEmpty) {
+      throw "GitHub Access Code Missing";
+    }
+
+    // FIXME: pagination!
+    var url =
+        "https://gitlab.com/api/v4/projects?simple=true&membership=true&order_by=last_activity_at&access_token=$_accessCode";
+
+    var response = await http.get(url);
+    if (response.statusCode != 200) {
+      print("GitLab listRepos: Invalid response " +
+          response.statusCode.toString() +
+          ": " +
+          response.body);
+      return null;
+    }
+
+    List<dynamic> list = jsonDecode(response.body);
+    List<GitLabRepo> repos = new List<GitLabRepo>();
+    list.forEach((dynamic d) {
+      var map = Map<String, dynamic>.from(d);
+      var repo = GitLabRepo.fromJson(map);
+      repos.add(repo);
+    });
+
+    // FIXME: Sort these based on some criteria
+    return repos;
+  }
+
+// FIXME: Proper error when the repo exists!
+  Future<GitLabRepo> createRepo(String name) async {
+    if (_accessCode.isEmpty) {
+      throw "GitLab Access Code Missing";
+    }
+
+    var url = "https://gitlab.com/api/v4/projects?access_token=$_accessCode";
+    Map<String, dynamic> data = {
+      'name': name,
+      'visibility': 'private',
+    };
+
+    var headers = {
+      HttpHeaders.contentTypeHeader: "application/json",
+    };
+
+    var response =
+        await http.post(url, headers: headers, body: json.encode(data));
+    if (response.statusCode != 201) {
+      print("GitLab createRepo: Invalid response " +
+          response.statusCode.toString() +
+          ": " +
+          response.body);
+      return null;
+    }
+
+    print("GitLab createRepo: " + response.body);
+    var map = json.decode(response.body);
+    return GitLabRepo.fromJson(map);
+  }
+
+  Future addDeployKey(String sshPublicKey, String repo) async {
+    if (_accessCode.isEmpty) {
+      throw "GitLab Access Code Missing";
+    }
+
+    repo = repo.replaceAll('/', '%2F');
+    var url =
+        "https://gitlab.com/api/v4/projects/$repo/deploy_keys?access_token=$_accessCode";
+
+    Map<String, dynamic> data = {
+      'title': "GitJournal",
+      'key': sshPublicKey,
+      'can_push': true,
+    };
+
+    var headers = {
+      HttpHeaders.contentTypeHeader: "application/json",
+    };
+
+    var response =
+        await http.post(url, headers: headers, body: json.encode(data));
+    if (response.statusCode != 201) {
+      print("GitLab addDeployKey: Invalid response " +
+          response.statusCode.toString() +
+          ": " +
+          response.body);
+      return null;
+    }
+
+    print("GitLab addDeployKey: " + response.body);
+    return json.decode(response.body);
+  }
+}
+
+class GitLabRepo {
+  String fullName;
+  String cloneUrl;
+
+  GitLabRepo({this.fullName, this.cloneUrl});
+  factory GitLabRepo.fromJson(Map<String, dynamic> parsedJson) {
+    return new GitLabRepo(
+      fullName: parsedJson['path_with_namespace'],
+      cloneUrl: parsedJson['ssh_url_to_repo'],
+    );
+  }
+
+  @override
+  String toString() {
+    return 'GitLabRepo{fulleName: $fullName, cloneUrl: $cloneUrl}';
+  }
+}

lib/oauthapp.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 
 import 'package:journal/apis/github.dart';
+import 'package:journal/apis/gitlab.dart';
 
 class OAuthApp extends StatefulWidget {
   @override
@@ -13,8 +14,7 @@ var key =
     'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC+VAh8r+vn0c+M+DacOo/szXcdMpxO1kIO3USkzgE5XdO83kQdDwh4Xc4P3dcc+FFSfVcEl3mSXGKbYC3G0ZoVcWd4ed40Gt3sLHSfNRQlRv+obnqKbzDLuOGfq65EkaJ90vrWBo/k7K8tBC2j1FZ/PUYy3DxeQkPEZXCMZDSG5P/+XoHn5IPcaxDpvlZjtOrx4H3pQ/YVI+XmyFAsZe+/Shy5sg4ilsdo4BQN2nODuBLwmgYu/hHmCcd8t4OxgBANVN8TMqHnZfRLixRSuXn0DbV4YOa/b2lBFQNvjkoBF6KhXOxZ+awyjyTpNp4AgF5c+3xptkNwUlwiQDCzcUmH your_email@example.com';
 
 class OAuthAppState extends State<OAuthApp> {
-  var github = new GitHub();
-  String githubAccessCode = "";
+  var github = new Gitlab();
 
   void initState() {
     super.initState();
@@ -41,9 +41,13 @@ class OAuthAppState extends State<OAuthApp> {
           RaisedButton(
             child: Text("List Repos"),
             onPressed: () async {
+              try {
                 var repos = await github.listRepos();
                 for (var repo in repos) {
-                print(repo.fullName);
+                  print(repo);
+                }
+              } catch (err) {
+                print("ListRepos: " + err.toString());
               }
             },
           ),
@@ -51,7 +55,8 @@ class OAuthAppState extends State<OAuthApp> {
             child: Text("Create Repo"),
             onPressed: () async {
               try {
-                await github.createRepo("journal_test2");
+                var repo = await github.createRepo("journal_test2");
+                print(repo);
               } catch (err) {
                 print("Create Repo: " + err.toString());
               }