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(
	'<p>'.pht('You will not be able to login using this account '.
	'once you unlink it. Continue?').'</p>');
	$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());
	}

	}