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Editing: class-bsf-custom-fonts-menu.php

<?php
/**
 * Class BSF_Custom_Fonts_Menu.
 *
 * @package Bsf_Custom_Fonts
 * @since 2.0.0
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}

/**
 * BSF_Custom_Fonts_Menu.
 *
 * @since 2.0.0
 */
class BSF_Custom_Fonts_Menu {

/**
	 * Instance
	 *
	 * @access private
	 * @var null $instance
	 * @since 2.0.0
	 */
	private static $instance;

/**
	 * Initiator
	 *
	 * @since 2.0.0
	 * @return object initialized object of class.
	 */
	public static function get_instance() {
		if ( ! isset( self::$instance ) ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

/**
	 * Plugin slug
	 *
	 * @since 2.0.0
	 * @var string $plugin_slug
	 */
	public static $plugin_slug = 'bsf-custom-fonts';

/**
	 * Parent Menu Slug
	 *
	 * @since  1.0.0
	 * @var (string) $parent_menu_slug
	 */
	protected $parent_menu_slug = 'themes.php';

/**
	 * Constructor
	 *
	 * @since 2.0.0
	 */
	public function __construct() {
		$this->initialize_hooks();
	}

/**
	 * Init Hooks.
	 *
	 * @since 2.0.0
	 * @return void
	 */
	public function initialize_hooks() {

add_action( 'admin_menu', array( $this, 'register_custom_fonts_menu' ) );
		add_action( 'admin_init', array( $this, 'settings_admin_scripts' ) );

add_filter( 'upload_mimes', array( $this, 'add_fonts_to_allowed_mimes' ) );
		add_filter( 'wp_check_filetype_and_ext', array( $this, 'update_mime_types' ), 10, 3 );
	}

/**
	 * Register custom font menu
	 *
	 * @since 1.0.0
	 */
	public function register_custom_fonts_menu() {
		$title = apply_filters( 'bsf_custom_fonts_menu_title', _x( 'Custom Fonts', 'Menu title', 'custom-fonts' ) );
		add_theme_page(
			$title,
			$title,
			'edit_theme_options',
			self::$plugin_slug,
			array( $this, 'render_admin_dashboard' )
		);
	}

/**
	 * Allowed mime types and file extensions
	 *
	 * @since 1.0.0
	 * @param array $mimes Current array of mime types.
	 * @return array $mimes Updated array of mime types.
	 */
	public function add_fonts_to_allowed_mimes( $mimes ) {
		$mimes['woff']  = 'application/x-font-woff';
		$mimes['woff2'] = 'application/x-font-woff2';
		$mimes['ttf']   = 'application/x-font-ttf';
		// Allow SVG with additional sanitization.
		$mimes['svg'] = 'image/svg+xml';
		$mimes['eot'] = 'application/vnd.ms-fontobject';
		$mimes['otf'] = 'font/otf';

return $mimes;
	}

/**
	 * Sanitizes SVG Code string.
	 *
	 * @param string $original_content SVG code to sanitize.
	 * @return string
	 * @since x.x.x
	 * */
	public function sanitize_svg( $original_content ) {

if ( ! $original_content ) {
			return '';
		}

// Define allowed tags and attributes.
		$allowed_tags = array(
			'a',
			'circle',
			'clippath',
			'defs',
			'style',
			'desc',
			'ellipse',
			'fegaussianblur',
			'filter',
			'foreignobject',
			'g',
			'image',
			'line',
			'lineargradient',
			'marker',
			'mask',
			'metadata',
			'path',
			'pattern',
			'polygon',
			'polyline',
			'radialgradient',
			'rect',
			'stop',
			'svg',
			'switch',
			'symbol',
			'text',
			'textpath',
			'title',
			'tspan',
			'use',
		);

$allowed_attributes = array(
			'class',
			'clip-path',
			'clip-rule',
			'fill',
			'fill-opacity',
			'fill-rule',
			'filter',
			'id',
			'mask',
			'opacity',
			'stroke',
			'stroke-dasharray',
			'stroke-dashoffset',
			'stroke-linecap',
			'stroke-linejoin',
			'stroke-miterlimit',
			'stroke-opacity',
			'stroke-width',
			'style',
			'systemlanguage',
			'transform',
			'href',
			'xlink:href',
			'xlink:title',
			'cx',
			'cy',
			'r',
			'requiredfeatures',
			'clippathunits',
			'type',
			'rx',
			'ry',
			'color-interpolation-filters',
			'stddeviation',
			'filterres',
			'filterunits',
			'height',
			'primitiveunits',
			'width',
			'x',
			'y',
			'font-size',
			'display',
			'font-family',
			'font-style',
			'font-weight',
			'text-anchor',
			'marker-end',
			'marker-mid',
			'marker-start',
			'x1',
			'x2',
			'y1',
			'y2',
			'gradienttransform',
			'gradientunits',
			'spreadmethod',
			'markerheight',
			'markerunits',
			'markerwidth',
			'orient',
			'preserveaspectratio',
			'refx',
			'refy',
			'viewbox',
			'maskcontentunits',
			'maskunits',
			'd',
			'patterncontentunits',
			'patterntransform',
			'patternunits',
			'points',
			'fx',
			'fy',
			'offset',
			'stop-color',
			'stop-opacity',
			'xmlns',
			'xmlns:se',
			'xmlns:xlink',
			'xml:space',
			'method',
			'spacing',
			'startoffset',
			'dx',
			'dy',
			'rotate',
			'textlength',
		);

$is_encoded = false;

$needle = "\x1f\x8b\x08";
		// phpcs:disable PHPCompatibility.ParameterValues.NewIconvMbstringCharsetDefault.NotSet
		if ( function_exists( 'mb_strpos' ) ) {
			$is_encoded = 0 === mb_strpos( $original_content, $needle );
		} else {
			$is_encoded = 0 === strpos( $original_content, $needle );
		}
		// phpcs:enable PHPCompatibility.ParameterValues.NewIconvMbstringCharsetDefault.NotSet

// phpcs:disable WordPress.PHP.YodaConditions.NotYoda
		if ( $is_encoded ) {
			$original_content = gzdecode( $original_content );
			if ( $original_content === false ) {
				return '';
			}
		}
		// phpcs:enable WordPress.PHP.YodaConditions.NotYoda

// Strip php tags.
		$content = preg_replace( '/<\?(=|php)(.+?)\?>/i', '', $original_content );
		$content = preg_replace( '/<\?(.*)\?>/Us', '', $content );
		$content = preg_replace( '/<\%(.*)\%>/Us', '', $content );

if ( ( false !== strpos( $content, '<?' ) ) || ( false !== strpos( $content, '<%' ) ) ) {
			return '';
		}

// Strip comments.
		$content = preg_replace( '//Us', '', $content );
		$content = preg_replace( '/\/\*(.*)\*\//Us', '', $content );

if ( ( false !== strpos( $content, '<!--' ) ) || ( false !== strpos( $content, '/*' ) ) ) {
			return '';
		}

// Strip line breaks.
		$content = preg_replace( '/\r|\n/', '', $content );

// Find the start and end tags so we can cut out miscellaneous garbage.
		$start = strpos( $content, '<svg' );
		$end   = strrpos( $content, '</svg>' );
		if ( false === $start || false === $end ) {
			return '';
		}

$content = substr( $content, $start, ( $end - $start + 6 ) );

// If the server's PHP version is 8 or up, make sure to disable the ability to load external entities.
		$php_version_under_eight = version_compare( PHP_VERSION, '8.0.0', '<' );
		if ( $php_version_under_eight ) {
			// phpcs:disable Generic.PHP.DeprecatedFunctions.Deprecated
			$libxml_disable_entity_loader = libxml_disable_entity_loader( true );
			// phpcs:enable Generic.PHP.DeprecatedFunctions.Deprecated
		}
		// Suppress the errors.
		$libxml_use_internal_errors = libxml_use_internal_errors( true );

// Create DOMDocument instance.
		$dom = new DOMDocument();
		// phpcs:disable WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase
		$dom->formatOutput        = false;
		$dom->preserveWhiteSpace  = false;
		$dom->strictErrorChecking = false;
		// phpcs:enable WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase

$open_svg = ! ! $content ? $dom->loadXML( $content ) : false;
		if ( ! $open_svg ) {
			return '';
		}

// Strip Doctype.
		// phpcs:disable WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase
		foreach ( $dom->childNodes as $child ) {
			if ( XML_DOCUMENT_TYPE_NODE === $child->nodeType && ! ! $child->parentNode ) {
				$child->parentNode->removeChild( $child );
		// phpcs:enable WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase
			}
		}

// Sanitize elements.
		// phpcs:disable WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase
		$elements = $dom->getElementsByTagName( '*' );
		for ( $index = $elements->length - 1; $index >= 0; $index-- ) {
			$current_element = $elements->item( $index );
			if ( ! in_array( strtolower( $current_element->tagName ), $allowed_tags ) ) {
				$current_element->parentNode->removeChild( $current_element );
				// phpcs:enable WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase
				continue;
			}

// Validate allowed attributes.
			for ( $i = $current_element->attributes->length - 1; $i >= 0; $i-- ) {
				$attr_name           = $current_element->attributes->item( $i )->name;
				$attr_name_lowercase = strtolower( $attr_name );
				if ( ! in_array( $attr_name_lowercase, $allowed_attributes ) &&
					! preg_match( '/^aria-/', $attr_name_lowercase ) &&
					! preg_match( '/^data-/', $attr_name_lowercase ) ) {
					$current_element->removeAttribute( $attr_name );
					continue;
				}

$attr_value = $current_element->attributes->item( $i )->value;
				if ( ! empty( $attr_value ) &&
					( preg_match( '/^((https?|ftp|file):)?\/\//i', $attr_value ) ||
					preg_match( '/base64|data|(?:java)?script|alert\(|window\.|document/i', $attr_value ) ) ) {
					$current_element->removeAttribute( $attr_name );
					continue;
				}
			}

// Strip xlink:href.
			$xlink_href = $current_element->getAttributeNS( 'http://www.w3.org/1999/xlink', 'href' );
			if ( $xlink_href && strpos( $xlink_href, '#' ) !== 0 ) {
				$current_element->removeAttributeNS( 'http://www.w3.org/1999/xlink', 'href' );
			}

// Strip use tag with external references.
			// phpcs:disable WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase
			if ( strtolower( $current_element->tagName ) === 'use' ) {
				$xlink_href = $current_element->getAttributeNS( 'http://www.w3.org/1999/xlink', 'href' );
				if ( $current_element->parentNode && $xlink_href && strpos( $xlink_href, '#' ) !== 0 ) {
					$current_element->parentNode->removeChild( $current_element );
					// phpcs:enable WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase
				}
			}
		}

// phpcs:disable WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase
		$sanitized = $dom->saveXML( $dom->documentElement, LIBXML_NOEMPTYTAG );
		// phpcs:enable WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase

// Restore defaults.
		if ( $php_version_under_eight && isset( $libxml_disable_entity_loader ) ) {
			// phpcs:disable Generic.PHP.DeprecatedFunctions.Deprecated
			libxml_disable_entity_loader( $libxml_disable_entity_loader );
			// phpcs:enable Generic.PHP.DeprecatedFunctions.Deprecated
		}
		libxml_use_internal_errors( $libxml_use_internal_errors );

return $sanitized;
	}

/**
	 * Correct the mime types and extension for the font types.
	 *
	 * @param array  $defaults File data array containing 'ext', 'type', and
	 *                                          'proper_filename' keys.
	 * @param string $file                      Full path to the file.
	 * @param string $filename                  The name of the file (may differ from $file due to
	 *                                          $file being in a tmp directory).
	 * @return Array File data array containing 'ext', 'type', and
	 */
	public function update_mime_types( $defaults, $file, $filename ) {
		if ( 'ttf' === pathinfo( $filename, PATHINFO_EXTENSION ) ) {
			$defaults['type'] = 'application/x-font-ttf';
			$defaults['ext']  = 'ttf';
		}

if ( 'otf' === pathinfo( $filename, PATHINFO_EXTENSION ) ) {
			$defaults['type'] = 'application/x-font-otf';
			$defaults['ext']  = 'otf';
		}

if ( 'svg' === pathinfo( $filename, PATHINFO_EXTENSION ) ) {
			// Perform SVG sanitization using the sanitize_svg function.
			$svg_content           = file_get_contents( $file ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents
			$sanitized_svg_content = $this->sanitize_svg( $svg_content );
			// phpcs:disable WordPress.WP.AlternativeFunctions.file_system_read_file_put_contents
			file_put_contents( $file, $sanitized_svg_content );
			// phpcs:enable WordPress.WP.AlternativeFunctions.file_system_read_file_put_contents

// Update mime type and extension.
			$defaults['type'] = 'image/svg+xml';
			$defaults['ext']  = 'svg';
		}

return $defaults;
	}

/**
	 *  Initialize after Astra gets loaded.
	 *
	 * @since 2.0.0
	 */
	public function settings_admin_scripts() {
		if ( $this->is_custom_fonts_screen() ) {
			add_action( 'admin_enqueue_scripts', array( $this, 'styles_scripts' ) );
			add_filter( 'admin_footer_text', array( $this, 'bsf_custom_fonts_admin_footer_link' ), 99 );
		}
	}

/**
	 * Check BSF Custom Fonts plugin screen.
	 *
	 * @return bool true|false after checking plugins page.
	 * @since 2.0.0
	 */
	public function is_custom_fonts_screen() {
		if ( isset( $_GET['page'] ) && sanitize_text_field( $_GET['page'] ) === self::$plugin_slug ) { //phpcs:ignore WordPress.Security.NonceVerification.Recommended
			return true;
		}
		return false;
	}

/**
	 * Renders the admin settings.
	 *
	 * @since 2.0.0
	 * @return void
	 */
	public function render_admin_dashboard() {
		?>
			<div class="bsf-cf-menu-page-wrapper">
				<div id="bsf-cf-menu-page">
					<div class="bsf-cf-menu-page-content">
						<div id="bsf-custom-font-dashboard-app" class="bsf-custom-font-dashboard-app"> </div>
					</div>
				</div>
			</div>
		<?php
	}

/**
	 * Enqueues the needed CSS/JS for the builder's admin settings page.
	 *
	 * @return void
	 * @since 2.0.0
	 */
	public function styles_scripts() {

if ( is_customize_preview() ) {
			return;
		}

wp_enqueue_style( 'bsf-custom-fonts-admin-font', 'https://fonts.googleapis.com/css2?family=Inter:wght@400;500&display=swap', array(), BSF_CUSTOM_FONTS_VER ); // Styles.

wp_enqueue_style( 'wp-components' );

$localize = array(
			'admin_base_url'      => admin_url(),
			'plugin_dir'          => BSF_CUSTOM_FONTS_URI,
			'plugin_ver'          => defined( 'BSF_CUSTOM_FONTS_VER' ) ? BSF_CUSTOM_FONTS_VER : '',
			'plugin_name'         => 'Custom Fonts',
			'ajax_url'            => admin_url( 'admin-ajax.php' ),
			'home_slug'           => self::$plugin_slug,
			'app_base_url'        => admin_url( 'themes.php?page=' . self::$plugin_slug ),
			'update_nonce'        => wp_create_nonce( 'astra_update_admin_setting' ),
			'add_font_nonce'      => wp_create_nonce( 'add_font_nonce' ),
			'edit_font_nonce'     => wp_create_nonce( 'edit_font_nonce' ),
			'delete_font_nonce'   => wp_create_nonce( 'delete_font_nonce' ),
			'preload_font_nonce'  => wp_create_nonce( 'preload_font_nonce' ),
			'googleFonts'         => BCF_Custom_Font_Families::get_google_fonts(),
			'existingGoogleFonts' => BCF_Custom_Font_Families::get_existing_google_fonts(),
			'fontPostCount'       => wp_count_posts( BSF_CUSTOM_FONTS_POST_TYPE )->publish,
			'googleFontAPI'       => 'https://fonts.googleapis.com/css?family',
			'fontWeightList'      => BCF_Custom_Font_Families::get_font_weight_list(),
			'preloading'          => get_option( 'bcf_preloading_fonts', false ),
		);

$this->settings_app_scripts( apply_filters( 'bsf_custom_fonts_dashboard_admin_localize', $localize ) );
	}

/**
	 * Settings app scripts
	 *
	 * @param array $localize Variable names.
	 *
	 * @return void
	 * @since 2.0.0
	 */
	public function settings_app_scripts( $localize ) {
		$handle    = 'bsf-custom-fonts-admin-dashboard-app';
		$build_url = BSF_CUSTOM_FONTS_ADMIN_URL . '/assets/build/';

wp_enqueue_media();
		$script_dep = array( 'react', 'react-dom', 'wp-api-fetch', 'wp-components', 'wp-element', 'wp-i18n', 'updates', 'wp-hooks' );

wp_register_script(
			$handle,
			$build_url . 'dashboard-app.js',
			$script_dep,
			BSF_CUSTOM_FONTS_VER,
			true
		);

wp_register_style(
			$handle,
			$build_url . 'dashboard-app.css',
			array(),
			BSF_CUSTOM_FONTS_VER
		);

wp_register_style(
			'bsf-custom-fonts-admin-google-fonts',
			'https://fonts.googleapis.com/css2?family=Inter:wght@200&display=swap',
			array(),
			BSF_CUSTOM_FONTS_VER
		);

wp_enqueue_script( $handle );

wp_set_script_translations( $handle, 'custom-fonts' );

wp_enqueue_style( 'bsf-custom-fonts-admin-google-fonts' );
		wp_enqueue_style( $handle );

wp_style_add_data( $handle, 'rtl', 'replace' );

wp_localize_script( $handle, 'bsf_custom_fonts_admin', $localize );
	}

/**
	 *  Add footer link.
	 *
	 * @since 2.0.0
	 */
	public function bsf_custom_fonts_admin_footer_link() {
		$footer_text = sprintf(
			/* translators: 1: Custom Fonts, 2: Plugin rating link */
			__( 'Enjoyed %1$s? Please leave us a %2$s rating. We really appreciate your support!', 'custom-fonts' ),
			'<span class="bcf-footer-thankyou"><strong> Custom Fonts </strong>',
			'<a href="https://wordpress.org/support/plugin/custom-fonts/reviews/?filter=5#new-post" target="_blank">&#9733;&#9733;&#9733;&#9733;&#9733;</a></span>'
		);
		return $footer_text;
	}
}

BSF_Custom_Fonts_Menu::get_instance();