testing

PhabricatorOAuthUnlinkController.php
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			<?php

			final class PhabricatorOAuthUnlinkController extends PhabricatorAuthController {

			private $provider;

			public function willProcessRequest(array $data) {
			$this->provider = PhabricatorOAuthProvider::newProvider($data['provider']);
			}

			public function processRequest() {
			$request = $this->getRequest();
			$user = $request->getUser();

			$provider = $this->provider;

			if ($provider->isProviderLinkPermanent()) {
			throw new Exception(
			pht("You may not unlink accounts from this OAuth provider."));
			}

			$provider_key = $provider->getProviderKey();

			$oauth_info = id(new PhabricatorUserOAuthInfo())->loadOneWhere(
			'userID = %d AND oauthProvider = %s',
			$user->getID(),
			$provider_key);

			if (!$oauth_info) {
			return new Aphront400Response();
			}

			if (!$request->isDialogFormPost()) {
			$dialog = new AphrontDialogView();
			$dialog->setUser($user);
			$dialog->setTitle(pht('Really unlink account?'));
			$dialog->appendChild(phutil_tag('p', array(), pht(
			'You will not be able to login using this account '.
			'once you unlink it. Continue?')));
			$dialog->addSubmitButton(pht('Unlink Account'));
			$dialog->addCancelButton($provider->getSettingsPanelURI());

			return id(new AphrontDialogResponse())->setDialog($dialog);
			}

			$oauth_info->delete();

			return id(new AphrontRedirectResponse())
			->setURI($provider->getSettingsPanelURI());
			}

			}