Added github auth

Author: auser

android/src/main/java/io/fullstack/oauth/OAuthManagerFragmentController.java

@@ -226,7 +226,7 @@ protected String doInBackground(Void... params) {
           String authorizationUrl;
 
           if (mCfg.containsKey("authorization_url_params")) {
-            final HashMap<String, Object> additionalParams = new HashMap<String, Object>();
+            final HashMap<String, String> additionalParams = new HashMap<String, String>();
             additionalParams.put("access_type", "offline");
             additionalParams.put("prompt", "consent");
 

android/src/main/java/io/fullstack/oauth/OAuthManagerProviders.java

@@ -18,6 +18,7 @@
 import com.github.scribejava.apis.TwitterApi;
 import com.github.scribejava.apis.FacebookApi;
 import com.github.scribejava.apis.GoogleApi20;
+import com.github.scribejava.apis.GitHubApi;
 
 public class OAuthManagerProviders {
   private static final String TAG = "OAuthManagerProviders";
@@ -43,6 +44,8 @@ static public OAuth20Service getApiFor20Provider(
       return OAuthManagerProviders.facebookService(params, callbackUrl);
     } else if (providerName.equalsIgnoreCase("google")) {
       return OAuthManagerProviders.googleService(params, callbackUrl);
+    } else if (providerName.equalsIgnoreCase("github")) {
+      return OAuthManagerProviders.githubService(params, callbackUrl);
     } else {
       return null;
     }
@@ -113,4 +116,34 @@ private static OAuth20Service googleService(final HashMap cfg, final String call
 
     return builder.build(GoogleApi20.instance());
   }
+
+  private static OAuth20Service githubService(final HashMap cfg, final String callbackUrl) {
+    String clientKey = (String) cfg.get("client_id");
+    String clientSecret = (String) cfg.get("client_secret");
+    String state;
+    if (cfg.containsKey("state")) {
+      state = (String) cfg.get("state");
+    } else {
+      state = TAG + new Random().nextInt(999_999);
+    }
+    String scope = "profile";
+    if (cfg.containsKey("scope")) {
+      scope = (String) cfg.get("scope");
+    }
+
+    ServiceBuilder builder = new ServiceBuilder()
+      .apiKey(clientKey)
+      .apiSecret(clientSecret)
+      .state(state)
+      .scope(scope)
+      .debug();
+    
+    if (callbackUrl != null) {
+      builder.callback(callbackUrl);
+    }
+
+    Log.d(TAG, "builder ---> " + callbackUrl);
+
+    return builder.build(GitHubApi.instance());
+  }
 }