yeuchaybo/lib/functions/utilities.php

<?php
/**
 * Child Theme Library * WARNING: This file is a part of the core Child Theme Library. * DO NOT edit this file under
 * any circumstances. Please use * the functions.php file to make any theme modifications.
 *
 * This file adds helper functions used in the Genesis Starter theme.
 *
 * @package   SEOThemes\ChildThemeLibrary
 * @link      https://github.com/seothemes/child-theme-library
 * @author    Thuan Bui
 * @copyright Copyright © 2018 Thuan Bui
 * @license   GPL-2.0+
 */

// If this file is called directly, abort.
if ( ! defined( 'ABSPATH' ) ) {

	die;

}

/**
 * Get config.
 *
 * @since  1.0.0
 *
 * @param  string $sub_config The rgba config to sanitize.
 *
 * @return mixed
 */
function child_theme_get_config( $sub_config = '' ) {

	$config = require apply_filters( 'child_theme_config', CHILD_THEME_CONFIG );

	if ( $sub_config ) {

		return $config[ $sub_config ];

	} else {

		return $config;

	}

}

/**
 * Sanitize RGBA values.
 *
 * If string does not start with 'rgba', then treat as hex then
 * sanitize the hex color and finally convert hex to rgba.
 *
 * @since  1.0.0
 *
 * @param  string $color The rgba color to sanitize.
 *
 * @return string $color Sanitized value.
 */
function child_theme_sanitize_rgba_color( $color ) {

	// Return invisible if empty.
	if ( empty( $color ) || is_array( $color ) ) {

		return 'rgba(0,0,0,0)';

	}

	// Return sanitized hex if not rgba value.
	if ( false === strpos( $color, 'rgba' ) ) {

		return sanitize_hex_color( $color );

	}

	$red   = '';
	$green = '';
	$blue  = '';
	$alpha = '';

	// Finally, sanitize and return rgba.
	$color = str_replace( ' ', '', $color );
	sscanf( $color, 'rgba(%d,%d,%d,%f)', $red, $green, $blue, $alpha );

	return 'rgba(' . $red . ',' . $green . ',' . $blue . ',' . $alpha . ')';

}

/**
 * Minify CSS helper function.
 *
 * @since  1.0.0
 *
 * @author Gary Jones
 * @link   https://github.com/GaryJones/Simple-PHP-CSS-Minification
 *
 * @param  string $css The CSS to minify.
 *
 * @return string Minified CSS.
 */
function child_theme_minify_css( $css ) {

	// Normalize whitespace.
	$css = preg_replace( '/\s+/', ' ', $css );

	// Remove spaces before and after comment.
	$css = preg_replace( '/(\s+)(\/\*(.*?)\*\/)(\s+)/', '$2', $css );

	// Remove comment blocks, everything between /* and */, unless preserved with /*! ... */ or /** ... */.
	$css = preg_replace( '~/\*(?![\!|\*])(.*?)\*/~', '', $css );

	// Remove ; before }.
	$css = preg_replace( '/;(?=\s*})/', '', $css );

	// Remove space after , : ; { } */ >.
	$css = preg_replace( '/(,|:|;|\{|}|\*\/|>) /', '$1', $css );

	// Remove space before , ; { } ( ) >.
	$css = preg_replace( '/ (,|;|\{|}|\)|>)/', '$1', $css );

	// Strips leading 0 on decimal values (converts 0.5px into .5px).
	$css = preg_replace( '/(:| )0\.([0-9]+)(%|em|ex|px|in|cm|mm|pt|pc)/i', '${1}.${2}${3}', $css );

	// Strips units if value is 0 (converts 0px to 0).
	$css = preg_replace( '/(:| )(\.?)0(%|em|ex|px|in|cm|mm|pt|pc)/i', '${1}0', $css );

	// Converts all zeros value into short-hand.
	$css = preg_replace( '/0 0 0 0/', '0', $css );

	// Shorten 6-character hex color codes to 3-character where possible.
	$css = preg_replace( '/#([a-f0-9])\\1([a-f0-9])\\2([a-f0-9])\\3/i', '#\1\2\3', $css );

	return trim( $css );

}

/**
 * Helper function to check if we're on a WooCommerce page.
 *
 * @since  1.0.0
 *
 * @link   https://docs.woocommerce.com/document/conditional-tags/.
 *
 * @return bool
 */
function child_theme_is_woocommerce_page() {

	if ( ! class_exists( 'WooCommerce' ) ) {

		return false;

	}

	if ( is_woocommerce() || is_shop() || is_product_category() || is_product_tag() || is_product() || is_cart() || is_checkout() || is_account_page() ) {

		return true;

	} else {

		return false;

	}

}

/**
 * Custom header image callback.
 *
 * Loads custom header or featured image depending on what is set on a per
 * page basis. If a featured image is set for a page, it will override
 * the default header image. It also gets the image for custom post
 * types by looking for a page with the same slug as the CPT e.g
 * the Portfolio CPT archive will pull the featured image from
 * a page with the slug of 'portfolio', if the page exists.
 *
 * @since  1.0.0
 *
 * @return string
 */
function child_theme_custom_header() {

	$id = '';

	// Get the current page ID.
	if ( class_exists( 'WooCommerce' ) && is_shop() ) {

		$id = wc_get_page_id( 'shop' );

	} elseif ( is_post_type_archive() ) {

		$id = get_page_by_path( get_query_var( 'post_type' ) );

	} elseif ( is_front_page() ) {

		$id = get_option( 'page_on_front' );

	} elseif ( 'posts' === get_option( 'show_on_front' ) && is_home() ) {

		$id = get_option( 'page_for_posts' );

	} elseif ( is_search() ) {

		$id = get_page_by_path( 'search' );

	} elseif ( is_404() ) {

		$id = get_page_by_path( 'error' );

	} elseif ( is_singular() ) {

		$id = get_the_id();

	}

	$url = get_the_post_thumbnail_url( $id, 'hero' );

	if ( '0' === $id || ! $url ) {

		$url = get_header_image();

	}

	return printf( '<style type="text/css">.hero-section{background-image: url(%s);}</style>' . "\n", esc_url( $url ) );

}

/**
 * Check if any Front Page widgets are active.
 *
 * @since  1.0.0
 *
 * @return bool
 */
function child_theme_has_front_page_widgets() {

	$config = child_theme_get_config( 'widget-areas' );

	foreach ( $config as $id => $location ) {

		if ( is_numeric( str_replace( 'front-page-', '', $id ) ) ) {

			if ( is_active_sidebar( $id ) ) {

				return true;

			}

		}

	}

	return false;

}