<?php
/**
 * @copyright 2017  Cloudways  https://www.cloudways.com
 *
 *  Original development of this plugin by JoomUnited https://www.joomunited.com/
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
defined( 'ABSPATH' ) || die( 'No direct script access allowed!' );

class Breeze_Minify {

	public function __construct() {
		//check disable cache for page
		$domain      = ( ( ( ! empty( $_SERVER['HTTPS'] ) && $_SERVER['HTTPS'] !== 'off' ) || ( ! empty( $_SERVER['SERVER_PORT'] ) && $_SERVER['SERVER_PORT'] == 443 ) ) ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'];
		$current_url = $domain . $_SERVER['REQUEST_URI'];

		$check_url = $this->check_exclude_url( $current_url );

		//load config file when redirect template
		if ( ! $check_url && self::should_cache() ) {
			//cache html
			//cache minification
			if ( Breeze_MinificationCache::create_cache_minification_folder() ) {
				$conf = breeze_get_option( 'basic_settings' );
				$config_advanced = breeze_get_option( 'advanced_settings' );
				if ( ! empty( $conf['breeze-minify-html'] ) || ! empty( $conf['breeze-minify-css'] ) || ! empty( $conf['breeze-minify-js'] ) || ! empty( $config_advanced['breeze-defer-js'] )) {

					if ( defined( 'breeze_INIT_EARLIER' ) ) {
						add_action( 'init', array( $this, 'breeze_start_buffering' ), - 1 );
					} else {
						add_action( 'wp_loaded', array( $this, 'breeze_start_buffering' ), 2 );
					}
				}
			}
		}

	}

	/**
	 * Check whether to execute caching functions or not.
	 * Will not execute for purge cache or heartbeat actions.
	 */
	public static function should_cache() {
		if ( isset( $_GET['breeze_purge'] ) || ( isset( $_POST['action'] ) && 'heartbeat' === $_POST['action'] ) ) {
			return false;
		}

		return true;
	}

	/*
	 * Start buffer
	 */
	public function breeze_start_buffering() {
		$ao_noptimize = false;

		// check for DONOTMINIFY constant as used by e.g. WooCommerce POS
		if ( defined( 'DONOTMINIFY' ) && ( constant( 'DONOTMINIFY' ) === true || constant( 'DONOTMINIFY' ) === "true" ) ) {
			$ao_noptimize = true;
		}
		// filter you can use to block autoptimization on your own terms
		$ao_noptimize = (bool) apply_filters( 'breeze_filter_noptimize', $ao_noptimize );
		if ( ! is_feed() && ! $ao_noptimize && ! is_admin() ) {
			// Config element
			$conf            = breeze_get_option( 'basic_settings' );
			$config_advanced = breeze_get_option( 'advanced_settings' );

			// Load our base class
			include_once( BREEZE_PLUGIN_DIR . 'inc/minification/breeze-minification-base.php' );

			// Load extra classes and set some vars
			if ( ! empty( $conf['breeze-minify-html'] ) ) {
				include_once( BREEZE_PLUGIN_DIR . 'inc/minification/breeze-minification-html.php' );
				// BUG: new minify-html does not support keeping HTML comments, skipping for now
				if ( ! class_exists( 'Minify_HTML' ) ) {
					@include( BREEZE_PLUGIN_DIR . 'inc/minification/minify/minify-html.php' );
				}
			}


			if ( ! empty( $conf['breeze-minify-js'] ) ) {

				include_once( BREEZE_PLUGIN_DIR . 'inc/minification/breeze-minification-scripts.php' );

				// JS/CSS minifier library
				include_once(BREEZE_PLUGIN_DIR.'vendor/autoload.php');

				if ( ! defined( 'CONCATENATE_SCRIPTS' ) ) {
					define( 'CONCATENATE_SCRIPTS', false );
				}
				if ( ! defined( 'COMPRESS_SCRIPTS' ) ) {
					define( 'COMPRESS_SCRIPTS', false );
				}
			} elseif ( ! empty( $config_advanced['breeze-defer-js'] ) ) {
				// If we have defer scripts to handle, load only the script for this action.
				include_once( BREEZE_PLUGIN_DIR . 'inc/minification/breeze-js-deferred-loading.php' );
			}

			if ( ! empty( $conf['breeze-minify-css'] ) ) {
				include_once( BREEZE_PLUGIN_DIR . 'inc/minification/breeze-minification-styles.php' );
				if ( defined( 'breeze_LEGACY_MINIFIERS' ) ) {
					if ( ! class_exists( 'Minify_CSS_Compressor' ) ) {
						@include( BREEZE_PLUGIN_DIR . 'inc/minification/minify/minify-css-compressor.php' );
					}
				} else {
					if ( ! class_exists( 'CSSmin' ) ) {
						@include( BREEZE_PLUGIN_DIR . 'inc/minification/minify/yui-php-cssmin-2.4.8-4_fgo.php' );
					}
				}
				if ( ! defined( 'COMPRESS_CSS' ) ) {
					define( 'COMPRESS_CSS', false );
				}
			}
			// Now, start the real thing!
			add_filter( 'breeze_minify_content_return', array( $this, 'breeze_end_buffering' ) );
		}
	}

	/*
	 * Minify css , js and optimize html when start
	 */

	public function breeze_end_buffering( $content ) {

		if ( stripos( $content, "<html" ) === false || stripos( $content, "<html amp" ) !== false || stripos( $content, "<html ⚡" ) !== false || stripos( $content, "<xsl:stylesheet" ) !== false ) {
			return $content;
		}
		// load URL constants as late as possible to allow domain mapper to kick in
		if ( function_exists( "domain_mapping_siteurl" ) ) {
			define( 'breeze_WP_SITE_URL', domain_mapping_siteurl( get_current_blog_id() ) );
			define( 'breeze_WP_CONTENT_URL', str_replace( get_original_url( breeze_WP_SITE_URL ), breeze_WP_SITE_URL, content_url() ) );
		} else {
			define( 'breeze_WP_SITE_URL', site_url() );
			define( 'breeze_WP_CONTENT_URL', content_url() );
		}
		if ( is_multisite() && apply_filters( 'breeze_separate_blog_caches', true ) ) {
			$blog_id = get_current_blog_id();
			define( 'breeze_CACHE_URL', breeze_WP_CONTENT_URL . BREEZE_CACHE_CHILD_DIR . $blog_id . '/' );
		} else {
			define( 'breeze_CACHE_URL', breeze_WP_CONTENT_URL . BREEZE_CACHE_CHILD_DIR );
		}
		define( 'breeze_WP_ROOT_URL', str_replace( BREEZE_WP_CONTENT_NAME, '', breeze_WP_CONTENT_URL ) );

		define( 'breeze_HASH', wp_hash( breeze_CACHE_URL ) );
		// Config element
		$conf   = breeze_get_option( 'basic_settings' );
		$minify = breeze_get_option( 'advanced_settings' );

		// Choose the classes
		$classes           = array();
		$js_include_inline = $css_include_inline = false;
		if ( ! empty( $conf['breeze-minify-js'] ) ) {
			$classes[] = 'Breeze_MinificationScripts';
		} elseif ( ! empty( $minify['breeze-defer-js'] ) ) {
			$classes[] = 'Breeze_Js_Deferred_Loading';
		}

		if ( ! empty( $conf['breeze-minify-css'] ) ) {
			$classes[] = 'Breeze_MinificationStyles';
		}
		if ( ! empty( $conf['breeze-minify-html'] ) ) {
			$classes[] = 'Breeze_MinificationHtml';
		}
		if ( ! empty( $conf['breeze-include-inline-js'] ) ) {
			$js_include_inline = true;
		}
		if ( ! empty( $conf['breeze-include-inline-css'] ) ) {
			$css_include_inline = true;
		}
		$groupcss = false;
		$groupjs  = false;
		if ( ! empty( $minify['breeze-group-css'] ) ) {
			$groupcss = true;
		}
		if ( ! empty( $minify['breeze-group-js'] ) ) {
			$groupjs = true;
		}

		// Set some options
		$classoptions = array(
			'Breeze_MinificationScripts' => array(
				'justhead'          => false,
				'forcehead'         => false,
				'trycatch'          => false,
				'js_exclude'        => "s_sid, smowtion_size, sc_project, WAU_, wau_add, comment-form-quicktags, edToolbar, ch_client, seal.js",
				'cdn_url'           => "",
				'include_inline'    => $js_include_inline,
				'group_js'          => $groupjs,
				'custom_js_exclude' => $minify['breeze-exclude-js'],
				'move_to_footer_js' => $minify['breeze-move-to-footer-js'],
				'defer_js'          => $minify['breeze-defer-js']
			),
			'Breeze_MinificationStyles'  => array(
				'justhead'             => false,
				'datauris'             => false,
				'defer'                => false,
				'defer_inline'         => false,
				'inline'               => false,
				'css_exclude'          => "admin-bar.min.css, dashicons.min.css",
				'cdn_url'              => "",
				'include_inline'       => $css_include_inline,
				'nogooglefont'         => false,
				'groupcss'             => $groupcss,
				'custom_css_exclude'   => $minify['breeze-exclude-css'],
				'include_imported_css' => false,
			),
			'Breeze_MinificationHtml'    => array(
				'keepcomments' => false
			),
			'Breeze_Js_Deferred_Loading' => array(
				'move_to_footer_js' => $minify['breeze-move-to-footer-js'],
				'defer_js' => $minify['breeze-defer-js'],
			),
		);

		$content = apply_filters( 'breeze_filter_html_before_minify', $content );

		if ( ! empty( $conf ) && $conf['breeze-disable-admin'] && ( current_user_can( 'administrator' ) || current_user_can( 'editor' ) || current_user_can( 'author' ) || current_user_can( 'contributor' ) ) ) {
			$content = apply_filters( 'breeze_html_after_minify', $content );

		} else {
			// Run the classes
			foreach ( $classes as $name ) {

				$do_process = false;
				$instance   = new $name( $content );
				if ( 'Breeze_MinificationStyles' === $name ) {
					$this_path_url = $instance->get_cache_file_url( 'css' );
					$do_process    = breeze_is_process_locked( $this_path_url );
				}

				if ( 'Breeze_MinificationScripts' === $name ) {
					$this_path_url = $instance->get_cache_file_url( 'js' );
					$do_process    = breeze_is_process_locked( $this_path_url );
				}

				if ( 'Breeze_MinificationHtml' === $name ) {
					$this_path_url = $instance->get_cache_file_url( '' );
					$do_process    = breeze_is_process_locked( $this_path_url );
				}

				if ( false === $do_process ) {

					if ( $instance->read( $classoptions[ $name ] ) ) {
						$instance->minify();
						$instance->cache();
						$content = $instance->getcontent();
					}
					unset( $instance );
				}

			}
			$content = apply_filters( 'breeze_html_after_minify', $content );
		}

		return $content;
	}

	/*
	 * check url from Never cache the following pages area
	 */
	public function check_exclude_url( $current_url ) {
		$opts_config = breeze_get_option( 'advanced_settings' );

		$is_exclude = breeze_check_for_exclude_values( $current_url, $opts_config['breeze-exclude-urls'] );
		if ( ! empty( $is_exclude ) ) {
			return true;
		}

		//check disable cache for page
		if ( ! empty( $opts_config['breeze-exclude-urls'] ) ) {
			foreach ( $opts_config['breeze-exclude-urls'] as $v ) {
				// Clear blank character
				$v = trim( $v );
				if ( preg_match( '/(\&?\/?\(\.?\*\)|\/\*|\*)$/', $v, $matches ) ) {
					// End of rules is *, /*, [&][/](*) , [&][/](.*)
					$pattent = substr( $v, 0, strpos( $v, $matches[0] ) );
					if ( $v[0] == '/' ) {
						// A path of exclude url with regex
						if ( ( @preg_match( '@' . $pattent . '@', $current_url, $matches ) > 0 ) ) {
							return true;
						}
					} else {
						// Full exclude url with regex
						if ( strpos( $current_url, $pattent ) !== false ) {
							return true;
						}
					}

				} else {
					// Whole path
					if ( $v == $current_url ) {
						return true;
					}
				}
			}
		}

		return false;

	}
}