Android Support #4

Author: fullstackduck

README.md

@@ -41,6 +41,21 @@ Make sure you have `GoogleService-Info.plist` with `CLIENT_ID`
 
 Add `REVERSED_CLIENT_ID` as url scheme to `Info.plist`
 
+### Android
+Inside your `strings.xml`
+```xml
+<resources>
+  <string name="server_client_id">Your Web Client Key</string>
+</resources>
+```
+
+Register plugin inside your `MainActivity.onCreate`
+```java
+this.init(savedInstanceState, new ArrayList<Class<? extends Plugin>>() {{
+  add(GoogleAuth.class);
+}});
+```
+
 ### Configure
 Provide configuration in root `capacitor.config.json`
 ```json
@@ -54,10 +69,3 @@ Provide configuration in root `capacitor.config.json`
 }
 
 ```
-
-### Support
-✔️ iOS
-
-✔️ Web
-
-🔜 Android

android/build.gradle

@@ -43,5 +43,6 @@ dependencies {
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'com.android.support.test:runner:1.0.2'
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+    implementation 'com.google.android.gms:play-services-auth:16.+'
 }
 

android/src/main/java/com/codetrixstudio/capacitor/GoogleAuth/GoogleAuth.java

@@ -1,20 +1,95 @@
 package com.codetrixstudio.capacitor.GoogleAuth;
 
+import android.content.Intent;
+
+import com.codetrixstudio.capacitor.GoogleAuth.capacitorgoogleauth.R;
 import com.getcapacitor.JSObject;
 import com.getcapacitor.NativePlugin;
 import com.getcapacitor.Plugin;
 import com.getcapacitor.PluginCall;
 import com.getcapacitor.PluginMethod;
+import com.google.android.gms.auth.api.signin.GoogleSignIn;
+import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
+import com.google.android.gms.auth.api.signin.GoogleSignInClient;
+import com.google.android.gms.auth.api.signin.GoogleSignInOptions;
+import com.google.android.gms.common.api.ApiException;
+import com.google.android.gms.common.api.Scope;
+import com.google.android.gms.tasks.Task;
+
+import org.json.JSONArray;
+import org.json.JSONException;
 
-@NativePlugin()
+@NativePlugin(requestCodes = GoogleAuth.RC_SIGN_IN)
 public class GoogleAuth extends Plugin {
+  static final int RC_SIGN_IN = 1337;
+  private GoogleSignInClient googleSignInClient;
 
-    @PluginMethod()
-    public void echo(PluginCall call) {
-        String value = call.getString("value");
+  @Override
+  public void load() {
+    String clientId = this.getContext().getString(R.string.server_client_id);
+    GoogleSignInOptions.Builder googleSignInBuilder = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
+      .requestIdToken(clientId)
+      .requestEmail();
 
-        JSObject ret = new JSObject();
-        ret.put("value", value);
-        call.success(ret);
+    try {
+      JSONArray scopeArray = (JSONArray) getConfigValue("scopes");
+      Scope[] scopes = new Scope[scopeArray.length() - 1];
+      Scope firstScope = new Scope(scopeArray.getString(0));
+      for (int i = 1; i < scopeArray.length(); i++) {
+        scopes[i - 1] = new Scope(scopeArray.getString(i));
+      }
+      googleSignInBuilder.requestScopes(firstScope, scopes);
+    } catch (JSONException e) {
+      e.printStackTrace();
     }
+
+    GoogleSignInOptions googleSignInOptions = googleSignInBuilder.build();
+    googleSignInClient = GoogleSignIn.getClient(this.getContext(), googleSignInOptions);
+  }
+
+  @PluginMethod()
+  public void signIn(PluginCall call) {
+    saveCall(call);
+    Intent signInIntent = googleSignInClient.getSignInIntent();
+    startActivityForResult(call, signInIntent, RC_SIGN_IN);
+  }
+
+  @Override
+  protected void handleOnActivityResult(int requestCode, int resultCode, Intent data) {
+    super.handleOnActivityResult(requestCode, resultCode, data);
+
+    if (requestCode == RC_SIGN_IN) {
+      Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
+      handleSignInResult(task);
+    }
+  }
+
+  private void handleSignInResult(Task<GoogleSignInAccount> completedTask) {
+    PluginCall signInCall = getSavedCall();
+
+    if (signInCall == null) return;
+
+    try {
+      GoogleSignInAccount account = completedTask.getResult(ApiException.class);
+
+      JSObject authentication = new JSObject();
+      authentication.put("idToken", account.getIdToken());
+
+      JSObject user = new JSObject();
+      user.put("serverAuthCode", account.getServerAuthCode());
+      user.put("authentication", authentication);
+
+      signInCall.success(user);
+
+    } catch (ApiException e) {
+      signInCall.error("Something went wrong", e);
+    }
+  }
+
+
+  @PluginMethod()
+  public void signOut(final PluginCall call) {
+    googleSignInClient.signOut();
+    call.success();
+  }
 }

android/src/main/res/values/strings.xml

@@ -1,3 +1,3 @@
 <resources>
-    <string name="my_string">Just a simple string</string>
+    <string name="server_client_id">Your Web Client Key</string>
 </resources>