<?php 
/**
 * Google Fonts Loader
 * @package AdvancedTabBlocks
 */

if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

if ( ! class_exists( 'ATBS_Fonts_Loader' ) ) {

    class ATBS_Fonts_Loader {

        private static $all_fonts = [];
	
        /**
         * Constructor
         * @return void
         */
        public function __construct() {
            add_action( 'wp_enqueue_scripts', [ $this, 'fonts_loader' ] );
            add_action( 'admin_enqueue_scripts', [ $this, 'fonts_loader' ] );
            add_action('atbs_render_block', [ $this, 'font_generator' ]);
        }

        /**
         * Font generator.
         * @param array $block
         * @return void
         */
        public function font_generator( $block ) {
            if ( isset( $block['attrs'] ) && is_array( $block['attrs'] ) ) {
                $attributes = $block['attrs'];
                foreach ( $attributes as $key => $value ) {
                    if ( ! empty( $value ) && 0 === strpos( $key, 'atbs_' ) && false !== strpos( $key, 'FontFamily' ) ) {
                        self::$all_fonts[] = $value;
                    }
                }
            }
        }

        /**
         * Load fonts
         * @return void
         * @access public
         */
        public function fonts_loader() {
            if ( is_array( self::$all_fonts ) && count( self::$all_fonts ) > 0 ) {

                $fonts = array_filter( array_unique( self::$all_fonts ) );

                if ( ! empty( $fonts ) ) {
                    $system = array(
                        'Arial',
                        'Tahoma',
                        'Verdana',
                        'Helvetica',
                        'Times New Roman',
                        'Trebuchet MS',
                        'Georgia',
                    );
                    $gfonts      = '';
                    $gfonts_attr = ':100,200,300,400,500,600,700,800,900';
                    foreach ( $fonts as $font ) {
                        if ( ! in_array( $font, $system, true ) && ! empty( $font ) ) {
                            $gfonts .= str_replace( ' ', '+', trim( $font ) ) . $gfonts_attr . '|';
                        }
                    }
                    if ( ! empty( $gfonts ) ) {
                        $url = add_query_arg(
                            array(
                                'family'  => rtrim( $gfonts, '|' ),
                                'display' => 'swap',
                            ),
                            'https://fonts.googleapis.com/css'
                        );
                        wp_register_style(
                            'atbs-fonts',
                            esc_url( $url ),
                            array(),
                            ATBS_VERSION
                        );
                        wp_enqueue_style( 'atbs-fonts' );
                    }
                }
            }
        }

    }

}