Custom scopes for different requirements (Android and iOS) (#269)

* Moved google auth initialize methods from the load function to the initialize function for users to add scopes on the fly

* custom scopes for ios

* update readme

* update readme

Author: AlvinTCH

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

@@ -53,23 +53,15 @@ public class GoogleAuth extends Plugin {
 
   private GoogleSignInClient googleSignInClient;
 
-  @Override
-  public void load() {
-    String clientId = getConfig().getString("androidClientId",
-      getConfig().getString("clientId",
-        this.getContext().getString(R.string.server_client_id)));
-
-    boolean forceCodeForRefreshToken = getConfig().getBoolean("forceCodeForRefreshToken", false);
-
+  public void loadSignInClient (String clientId, boolean forceCodeForRefreshToken, String[] scopeArray) {
     GoogleSignInOptions.Builder googleSignInBuilder = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
-            .requestIdToken(clientId)
-            .requestEmail();
+      .requestIdToken(clientId)
+      .requestEmail();
 
     if (forceCodeForRefreshToken) {
       googleSignInBuilder.requestServerAuthCode(clientId, true);
     }
 
-    String[] scopeArray = getConfig().getArray("scopes", new String[] {});
     Scope[] scopes = new Scope[scopeArray.length - 1];
     Scope firstScope = new Scope(scopeArray[0]);
     for (int i = 1; i < scopeArray.length; i++) {
@@ -81,6 +73,9 @@ public void load() {
     googleSignInClient = GoogleSignIn.getClient(this.getContext(), googleSignInOptions);
   }
 
+  @Override
+  public void load() {}
+
   @PluginMethod()
   public void signIn(PluginCall call) {
     Intent signInIntent = googleSignInClient.getSignInIntent();
@@ -177,6 +172,31 @@ public void onFailure(Exception e) {
 
   @PluginMethod()
   public void initialize(final PluginCall call) {
+    // get data from config
+    String configClientId = getConfig().getString("androidClientId",
+      getConfig().getString("clientId",
+        this.getContext().getString(R.string.server_client_id)));
+    boolean configForceCodeForRefreshToken = getConfig().getBoolean("forceCodeForRefreshToken", false);
+    // need to get this as string so as to standardize with data from plugin call
+    String configScopeArray = getConfig().getString("scopes", new String());
+
+    // get client id from plugin call, fallback to be client id from config
+    String clientId = call.getData().getString("clientId", configClientId);
+    // get forceCodeForRefreshToken from call, fallback to be from config
+    boolean forceCodeForRefreshToken = call.getData().getBoolean("grantOfflineAccess", configForceCodeForRefreshToken);
+    // get scopes from call, fallback to be from config
+    String scopesStr = call.getData().getString("scopes", configScopeArray);
+    // replace all the symbols from parsing array as string
+    // leaving only scopes delimited by commas
+    String replacedScopesStr = scopesStr
+      .replaceAll("[\"\\[\\] ]", "")
+      // this is for scopes that are in the form of a url
+      .replace("\\", "");
+
+    // scope to be in the form of an array
+    String[] scopeArray = replacedScopesStr.split(",");
+
+    loadSignInClient(clientId, forceCodeForRefreshToken, scopeArray);
     call.resolve();
   }
 

ios/Plugin/Plugin.swift

@@ -14,34 +14,56 @@ public class GoogleAuth: CAPPlugin {
     var forceAuthCode: Bool = false;
     var additionalScopes: [String]!;
 
-    
-    public override func load() {
+    func loadSignInClient (
+        customClientId: String,
+        customScopes: [String]
+    ) {
         googleSignIn = GIDSignIn.sharedInstance;
 
         let serverClientId = getServerClientIdValue();
-        
-        guard let clientId = getClientIdValue() else {
-            NSLog("no client id found in config")
-            return;
-        }
 
-        googleSignInConfiguration = GIDConfiguration.init(clientID: clientId, serverClientID: serverClientId)
+        googleSignInConfiguration = GIDConfiguration.init(clientID: customClientId, serverClientID: serverClientId)
 
         // these are scopes granted by default by the signIn method
         let defaultGrantedScopes = ["email", "profile", "openid"];
-
         // these are scopes we will need to request after sign in
-        additionalScopes = (getConfig().getArray("scopes") as? [String] ?? []).filter {
+        additionalScopes = customScopes.filter {
             return !defaultGrantedScopes.contains($0);
         };
-                
+
         forceAuthCode = getConfig().getBoolean("forceCodeForRefreshToken", false)
 
         NotificationCenter.default.addObserver(self, selector: #selector(handleOpenUrl(_ :)), name: Notification.Name(Notification.Name.capacitorOpenURL.rawValue), object: nil);
     }
 
+    
+    public override func load() {
+    }
+
     @objc
     func initialize(_ call: CAPPluginCall) {
+        // get client id from initialize, with client id from config file as fallback
+        guard let clientId = call.getString("clientId") ?? getClientIdValue() as? String else {
+            NSLog("no client id found in config");
+            call.resolve();
+            return;
+        }
+
+        // get scopes from initialize, with scopes from config file as fallback
+        let customScopes = call.getArray("scopes", String.self) ?? (
+            getConfigValue("scopes") as? [String] ?? []
+        );
+
+        // get force auth code from initialize, with config from config file as fallback
+        forceAuthCode = call.getBool("grantOfflineAccess") ?? (
+            getConfigValue("forceCodeForRefreshToken") as? Bool ?? false
+        );
+        
+        // load client
+        self.loadSignInClient(
+            customClientId: clientId,
+            customScopes: customScopes
+        )
         call.resolve();
     }