PhabricatorHelpEditorProtocolController.php
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	<?php

	final class PhabricatorHelpEditorProtocolController
	extends PhabricatorHelpController {

	public function shouldAllowPublic() {
	return true;
	}

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

	$dialog = id(new AphrontDialogView())
	->setUser($viewer)
	->setMethod('GET')
	->setSubmitURI('/settings/panel/display/')
	->setTitle(pht('Unsupported Editor Protocol'))
	->appendParagraph(
	pht(
	'Your configured editor URI uses an unsupported protocol. Change '.
	'your settings to use a supported protocol, or ask your '.
	'administrator to add support for the chosen protocol by '.
	'configuring: %s',
	phutil_tag('tt', array(), 'uri.allowed-editor-protocols')))
	->addSubmitButton(pht('Change Settings'))
	->addCancelButton('/');

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

	public static function hasAllowedProtocol($uri) {
	$uri = new PhutilURI($uri);
	$editor_protocol = $uri->getProtocol();
	if (!$editor_protocol) {
	// The URI must have a protocol.
	return false;
	}

	$allowed_key = 'uri.allowed-editor-protocols';
	$allowed_protocols = PhabricatorEnv::getEnvConfig($allowed_key);
	if (empty($allowed_protocols[$editor_protocol])) {
	// The protocol must be on the allowed protocol whitelist.
	return false;
	}

	return true;
	}


	}