<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Moodle-specific selectors.
 *
 * @package    core
 * @category   test
 * @copyright  2013 David Monllaó
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

require_once(__DIR__ . '/exact_named_selector.php');
require_once(__DIR__ . '/partial_named_selector.php');

use Behat\Mink\Exception\ExpectationException as ExpectationException;

/**
 * Moodle selectors manager.
 *
 * @package    core
 * @category   test
 * @copyright  2013 David Monllaó
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class behat_selectors {

    /**
     * Returns the behat selector and locator for a given moodle selector and locator
     *
     * @param string $selectortype The moodle selector type, which includes moodle selectors
     * @param string $element The locator we look for in that kind of selector
     * @param Session $session The Mink opened session
     * @return array Contains the selector and the locator expected by Mink.
     */
    public static function get_behat_selector($selectortype, $element, Behat\Mink\Session $session) {

        // CSS and XPath selectors locator is one single argument.
        if ($selectortype == 'css_element' || $selectortype == 'xpath_element') {
            $selector = str_replace('_element', '', $selectortype);
            $locator = $element;
        } else {
            // Named selectors uses arrays as locators including the type of named selector.
            $allowedselectors = self::get_allowed_selectors();
            if (!isset($allowedselectors[$selectortype])) {
                throw new ExpectationException('The "' . $selectortype . '" selector not registered.', $session);
            }
            $locator = array($allowedselectors[$selectortype], behat_context_helper::escape($element));

            // Get the selector which should be used.
            $allowedpartialselectors = behat_partial_named_selector::get_allowed_selectors();
            $allowedexactselectors = behat_exact_named_selector::get_allowed_selectors();
            if (isset($allowedpartialselectors[$selectortype])) {
                $selector = 'named_partial';
            } else if (isset($allowedexactselectors[$selectortype])) {
                $selector = 'named_exact';
            } else {
                throw new ExpectationException('The "' . $selectortype . '" selector not registered.', $session);
            }
        }

        return array($selector, $locator);
    }

    /**
     * Allowed selectors getter.
     *
     * @return array
     */
    public static function get_allowed_selectors() {
        return array_merge(
            behat_partial_named_selector::get_allowed_selectors(),
            behat_exact_named_selector::get_allowed_selectors()
        );
    }

    /**
     * Allowed text selectors getter.
     *
     * @return array
     */
    public static function get_allowed_text_selectors() {
        return array_merge(
            behat_partial_named_selector::get_allowed_text_selectors(),
            behat_exact_named_selector::get_allowed_text_selectors()
        );
    }
}