Added re OAuth

app/src/main/java/eu/faircode/email/FragmentIdentity.java

@@ -19,6 +19,8 @@ package eu.faircode.email;
     Copyright 2018-2019 by Marcel Bokhorst (M66B)
 */
 
+import android.accounts.Account;
+import android.accounts.AccountManager;
 import android.app.Dialog;
 import android.app.NotificationManager;
 import android.content.Context;
@@ -50,6 +52,7 @@ import android.widget.RadioGroup;
 import android.widget.ScrollView;
 import android.widget.Spinner;
 import android.widget.TextView;
+import android.widget.Toast;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -96,6 +99,7 @@ public class FragmentIdentity extends FragmentBase {
     private EditText etPort;
     private EditText etUser;
     private TextInputLayout tilPassword;
+    private Button btnOAuth;
     private EditText etRealm;
     private CheckBox cbUseIp;
 
@@ -179,6 +183,7 @@ public class FragmentIdentity extends FragmentBase {
         etPort = view.findViewById(R.id.etPort);
         etUser = view.findViewById(R.id.etUser);
         tilPassword = view.findViewById(R.id.tilPassword);
+        btnOAuth = view.findViewById(R.id.btnOAuth);
         etRealm = view.findViewById(R.id.etRealm);
         cbUseIp = view.findViewById(R.id.cbUseIp);
 
@@ -388,6 +393,13 @@ public class FragmentIdentity extends FragmentBase {
             }
         });
 
+        btnOAuth.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                onAuth();
+            }
+        });
+
         cbSynchronize.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
             @Override
             public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
@@ -841,6 +853,56 @@ public class FragmentIdentity extends FragmentBase {
         }.execute(this, args, "identity:save");
     }
 
+    private void onAuth() {
+        Bundle args = new Bundle();
+        args.putLong("id", id);
+
+        new SimpleTask<String>() {
+            @Override
+            protected void onPreExecute(Bundle args) {
+                btnOAuth.setEnabled(false);
+            }
+
+            @Override
+            protected void onPostExecute(Bundle args) {
+                btnOAuth.setEnabled(true);
+            }
+
+            @Override
+            protected String onExecute(Context context, Bundle args) throws Throwable {
+                long id = args.getLong("id");
+
+                DB db = DB.getInstance(context);
+
+                EntityIdentity identity = db.identity().getIdentity(id);
+                if (identity == null)
+                    return null;
+
+                AccountManager am = AccountManager.get(getContext());
+                Account[] accounts = am.getAccountsByType("com.google");
+                for (Account google : accounts)
+                    if (identity.user.equals(google.name))
+                        return am.blockingGetAuthToken(
+                                google,
+                                MailService.getAuthTokenType("com.google"),
+                                true);
+
+                return null;
+            }
+
+            @Override
+            protected void onExecuted(Bundle args, String token) {
+                ToastEx.makeText(getContext(), R.string.title_completed, Toast.LENGTH_LONG).show();
+                tilPassword.getEditText().setText(token);
+            }
+
+            @Override
+            protected void onException(Bundle args, Throwable ex) {
+                Log.unexpectedError(getParentFragmentManager(), ex);
+            }
+        }.execute(this, args, "account:oauth");
+    }
+
     private void showError(Throwable ex) {
         tvError.setText(Log.formatThrowable(ex, false));
         grpError.setVisibility(View.VISIBLE);
@@ -979,6 +1041,9 @@ public class FragmentIdentity extends FragmentBase {
                     tilPassword.setEnabled(false);
                 }
 
+                if (identity == null && identity.auth_type != MailService.AUTH_TYPE_GMAIL)
+                    Helper.hide(btnOAuth);
+
                 cbPrimary.setEnabled(cbSynchronize.isChecked());
 
                 pbWait.setVisibility(View.GONE);