<?php
/**
 * This source file is part of the open source project
 * ExpressionEngine (https://expressionengine.com)
 *
 * @link      https://expressionengine.com/
 * @copyright Copyright (c) 2003-2022, Packet Tide, LLC (https://www.packettide.com)
 * @license   https://expressionengine.com/license Licensed under Apache License, Version 2.0
 */

namespace ExpressionEngine\Service\Filter;

use InvalidArgumentException;
use ExpressionEngine\Library\CP\URL;
use ExpressionEngine\Service\View\ViewFactory;

/**
 * Site Filter
 *
 * This will provide the HTML for a filter that will list a set of sites as well
 * as a custom <input> element for searching for a site.
 */
class Site extends Filter
{
    protected $msm_enabled = false;

    /**
     * Constructor
     *
     * @see Filter::$options for the format of the options array
     *
     * @param array $options An associative array of options
     */
    public function __construct(array $options = array())
    {
        $this->name = 'filter_by_site';
        $this->label = 'site_filter';
        $this->placeholder = lang('filter_by_site');
        $this->options = $options;
    }

    /**
     * Sets the $msm_enabled boolean variable to TRUE
     *
     * @return void
     */
    public function enableMSM()
    {
        $this->msm_enabled = true;
    }

    /**
     * Sets the $msm_enabled boolean variable to FALSE
     *
     * @return void
     */
    public function disableMSM()
    {
        $this->msm_enabled = false;
    }

    /**
     * Validation: is the value in our list of options?
     */
    public function isValid()
    {
        // This is "valid" if MSM is Disabled
        if (! $this->msm_enabled) {
            return true;
        }

        if (! (int) $this->value()) {
            return false;
        }

        return (array_key_exists((int) $this->value(), $this->options));
    }

    /**
     * @see Filter::value For the parent behavior
     *
     * Overriding the value method to account for someone searching for a
     * site
     *
     * @return int|NULL The value of the filter (NULL if it has no value)
     */
    public function value()
    {
        $value = parent::value();

        if (! is_numeric($value) && ! empty($value)) {
            $needle = strtolower($value);

            $matches = array_filter($this->options, function ($haystack) use ($needle) {
                return(strpos(strtolower($haystack), $needle));
            });

            if (! empty($matches)) {
                $value = array_shift(array_keys($matches));
            }
        }

        return $value;
    }

    /**
     * @see Filter::render for render behavior and arguments
     *
     * Overrides the abstract render behavior by returning an empty string
     * if multtiple sites are not available.
     */
    public function render(ViewFactory $view, URL $url)
    {
        if (! $this->msm_enabled) {
            return '';
        }

        return parent::render($view, $url);
    }
}

// EOF
