<?php
namespace Stackable\DynamicContent\Sources;

class Util {
    /**
     * Function for formatting a date.
     *
     * @param string $date
     * @param string $format
     *
     * @return string generated date.
     */
    public static function format_date( $date, $format ) {
        return (string) date_format( date_create( $date ), $format );
    }

    /**
     * Function for parsing the `data-stk-dynamic` content to readable format.
     *
     * @example
     * ```
     * $this->parse_field_data( 'current-post/post-title/123?arg1=value_of_arg1' );
     * ```
     *
     * returns array(
     *      'route' => 'current-post/post-title?arg1=value_of_arg1',
     *      'source' => 'current-post',
     *      'field' => 'post-title',
     *      'id' => '123', 'args' => array(
     *          'arg1' => 'value_of_arg1',
     *      ),
     * )
     *
     * @param string data-stk-dynamic content
     * @return array parsed args
     */
    public static function parse_field_data( $data ) {
        $field_data = parse_url( $data );
        parse_str( html_entity_decode( $data ), $output );
        $route = explode( '/', $field_data['path'] );

        $args = array();
        $args['route'] = $data;
        $args['source'] = $route[0];
        $args['field'] = $route[1];
        $args['args'] = array();

        if ( array_key_exists( 'query', $field_data ) ) {
            parse_str( html_entity_decode( $field_data['query'] ), $route_args );
            $args['args'] = $route_args;
        }

        if ( array_key_exists( 2, $route ) ) {
            $args['id'] = $route[2];
        } else {
            $args['id'] = get_the_ID();
        }

        return $args;
    }

    /**
     * Utility function for converting an output into a link.
     *
     * @param string dynamic content
     * @param string url
     * @param boolean if true, `target="_blank"` attribute will be added.
     * @return string link
     */
    public static function make_output_link( $output, $href, $new_tab ) {
        return sprintf( '<a href="%s"%s>%s</a>', $href, $new_tab ? ' target="_blank" rel="noreferrer noopener"' : '', $output );
    }

    /**
     * Gets supported custom post types.
     *
     * @return array post type slugs.
     */
    public static function get_supported_post_type_slugs() {
        $excluded_post_types = apply_filters( 'stackable_dynamic_content/exclude_post_types', [
            'attachment',
            'revision',
            'wp_block',
            'nav_menu_item',
            'custom_css',
            'customize_changeset',
            'oembed_cache',
            'user_request',
            'acf-field',
            'acf-field-group',
        ] );

        $output = array();
        foreach ( get_post_types() as $post_type ) {
            if ( ! in_array( $post_type, $excluded_post_types ) ) {
                array_push( $output, $post_type );
            }
        }

        return $output;
    }
}