<?php
/**
 * core/template/filters.php
 *
 * This class is for managing template filters.
 *
 * @version 3.0
 * @author  Joey Kimsey <Joey@thetempusproject.com>
 * @link    https://TheTempusProject.com/Core
 * @license https://opensource.org/licenses/MIT [MIT LICENSE]
 */
namespace TheTempusProject\Houdini\Classes;

use TheTempusProject\Canary\Bin\Canary as Debug;

class Filters {
    public static $filters = [
        'comments' => [
            'name' => 'comments',
            'match' => '#/\*.*?\*/#s',
            'replace' => '',
            'enabled' => true,
        ],
        'commentsTwo' => [
            'name' => 'commentsTwo',
            'match' => '#(?<!:)//.*#',
            'replace' => '',
            'enabled' => true,
        ],
        'formComponents' => [
            'name' => 'formComponents',
            'match' => '#{CHECKED:(.*?)=(.*?)}#s',
            'replace' => '',
            'enabled' => true,
        ],
    ];

    /**
     * Iterates through the filters list on $data. Leaving only the internal
     * contents of enabled filters and removing all traces of disabled filters.
     *
     * @param {string} [$data]
     * @return {string}
     */
    public static function apply( $data, $force = false ) {
        if ( empty( self::$filters ) ) {
            return $data;
        }
        foreach ( self::$filters as $pattern ) {
            if ( $pattern['enabled'] || false !== $force ) {
                if ( ! empty( $pattern['callback'] ) && is_array( $pattern['callback'] ) ) {
                    $result = preg_replace_callback(
                        $pattern['match'],
                        $pattern['callback'],
                        $data
                    );
                } else {
                    $result = preg_replace(
                        $pattern['match'],
                        $pattern['replace'],
                        $data
                    );
                }
                $data = trim( $result );
            }
        }
        return $data;
    }

    public static function applyOne( $name, $data, $force = false ) {
        if ( empty( self::$filters ) || empty( self::$filters[$name] ) ) {
            return $data;
        }
        if ( self::$filters[$name]['enabled'] || false !== $force ) {
            if ( ! empty( self::$filters[$name]['callback'] ) && is_array( self::$filters[$name]['callback'] ) ) {
                $result = preg_replace_callback(
                    self::$filters[$name]['match'],
                    self::$filters[$name]['callback'],
                    $data
                );
            } else {
                $result = preg_replace(
                    self::$filters[$name]['match'],
                    self::$filters[$name]['replace'],
                    $data
                );
            }
            $data = trim( $result );
        }
        return $data;
    }

    /**
     * Adds a filter.
     *
     * @param {string} [$filterName]
     * @param {string} [$match]
     * @param {string} [$replace]
     * @param {bool} [$enabled] - Whether the filter should be enabled or disabled.
     */
    public static function add( $filterName, $match, $replace, $enabled = false, $callback = false ) {
        if ( isset( self::$filters[$filterName] ) ) {
            Debug::error( "Filter already exists: $filterName" );
            return;
        }
        if ( $callback === true ) {
            self::$filters[ $filterName ] = [
                'name' => $filterName,
                'match' => $match,
                'callback' => $replace,
                'enabled' => $enabled,
            ];
            return;
        }
        self::$filters[ $filterName ] = [
            'name' => $filterName,
            'match' => $match,
            'replace' => $replace,
            'enabled' => $enabled,
        ];
        return;
    }

    /**
     * Removes a filter.
     *
     * @param {string} [$filterName]
     * @return {bool}
     */
    public function remove( $filterName ) {
        if ( !isset( self::$filters[$filterName] ) ) {
            Debug::error( "Filter does not exist: $filterName" );
            return false;
        }
        unset( self::$filters[$filterName] );
        return true;
    }

    /**
     * Enable a filter.
     *
     * @param {string} [$filterName]
     * @return {bool}
     */
    public function enable( $filterName ) {
        if ( !isset( self::$filters[$filterName] ) ) {
            Debug::error( "Filter does not exist: $filterName" );
            return false;
        }
        self::$filters[$filterName]['enabled'] = true;
        return true;
    }

    /**
     * Disables a filter.
     *
     * @param {string} [$filterName]
     * @return {bool}
     */
    public function disable( $filterName ) {
        if ( !isset( self::$filters[$filterName] ) ) {
            Debug::error( "Filter does not exist: $filterName" );
            return false;
        }
        self::$filters[$filterName]['enabled'] = false;
        return true;
    }
}