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Edit File: Minify_Plugin_Admin.php

<?php
/**
 * File: Minify_Plugin_Admin.php
 *
 * @package W3TC
 */

namespace W3TC;

/**
 * Class Minify_Plugin_Admin
 *
 * phpcs:disable PSR2.Classes.PropertyDeclaration.Underscore
 */
class Minify_Plugin_Admin {
	/**
	 * Config
	 *
	 * @var Config
	 */
	private $_config = null;

/**
	 * Constructor method for the Minify_Plugin_Admin class.
	 *
	 * @return void
	 */
	public function __construct() {
		$this->_config = Dispatcher::config();
	}

/**
	 * Initializes the plugin by registering filters and actions.
	 *
	 * @return void
	 */
	public function run() {
		add_filter( 'w3tc_save_options', array( $this, 'w3tc_save_options' ) );

$config_labels = new Minify_ConfigLabels();
		add_filter( 'w3tc_config_labels', array( $config_labels, 'config_labels' ) );

if ( $this->_config->get_boolean( 'minify.enabled' ) ) {
			add_filter( 'w3tc_usage_statistics_summary_from_history', array( $this, 'w3tc_usage_statistics_summary_from_history' ), 10, 2 );
			add_filter( 'w3tc_notes', array( $this, 'w3tc_notes' ) );
			add_filter( 'w3tc_errors', array( $this, 'w3tc_errors' ) );
		}

add_action( 'w3tc_ajax_minify_help', array( $this, 'w3tc_ajax_minify_help' ) );
		add_action( 'w3tc_message_action_minify_help', array( $this, 'w3tc_message_action_minify_help' ) );

if ( defined( 'W3TC_DEBUG' ) && W3TC_DEBUG ) {
			add_filter( 'w3tc_admin_bar_menu', array( $this, 'w3tc_admin_bar_menu' ) );
		}
	}

/**
	 * Adds the Minify cache menu item to the WordPress admin bar.
	 *
	 * @param array $menu_items Existing menu items.
	 *
	 * @return array Modified menu items.
	 */
	public function w3tc_admin_bar_menu( $menu_items ) {
		$menu_items['90040.minify'] = array(
			'id'     => 'w3tc_overlay_minify',
			'parent' => 'w3tc_debug_overlays',
			'title'  => __( 'Minify Cache', 'w3-total-cache' ),
			'href'   => wp_nonce_url( network_admin_url( 'admin.php?page=w3tc_dashboard&amp;w3tc_message_action=minify_help' ), 'w3tc' ),
		);

return $menu_items;
	}

/**
	 * Handles the minify help action triggered in admin messages.
	 *
	 * @return void
	 */
	public function w3tc_message_action_minify_help() {
		wp_enqueue_script( 'w3tc-minify-help', plugins_url( 'Minify_GeneralPage_View_ShowHelp.js', W3TC_FILE ), array(), W3TC_VERSION, false );
		wp_enqueue_script( 'w3tc-minify-help-force', plugins_url( 'Minify_GeneralPage_View_ShowHelpForce.js', W3TC_FILE ), array(), W3TC_VERSION, false );
	}

/**
	 * Processes and saves plugin options.
	 *
	 * @param array $data Array containing new and old configuration data.
	 *
	 * @return array Processed configuration data.
	 */
	public function w3tc_save_options( $data ) {
		$new_config = $data['new_config'];
		$old_config = $data['old_config'];

if ( $new_config->get_boolean( 'minify.enabled' ) && ! $old_config->get_boolean( 'minify.enabled' ) ) {
			$state = Dispatcher::config_state();
			$state->set( 'minify.hide_minify_help', true );
			$state->save();

}

// Schedule purge if enabled.
		if ( $new_config->get_boolean( 'minify.enabled' ) && $new_config->get_boolean( 'minify.wp_cron' ) ) {
			$new_wp_cron_time      = $new_config->get_integer( 'minify.wp_cron_time' );
			$old_wp_cron_time      = $old_config ? $old_config->get_integer( 'minify.wp_cron_time' ) : -1;
			$new_wp_cron_interval  = $new_config->get_string( 'minify.wp_cron_interval' );
			$old_wp_cron_interval  = $old_config ? $old_config->get_string( 'minify.wp_cron_interval' ) : -1;
			$schedule_needs_update = $new_wp_cron_time !== $old_wp_cron_time || $new_wp_cron_interval !== $old_wp_cron_interval;

// Clear the scheduled hook if a change in time or interval is detected.
			if ( wp_next_scheduled( 'w3tc_minifycache_purge_wpcron' ) && $schedule_needs_update ) {
				wp_clear_scheduled_hook( 'w3tc_minifycache_purge_wpcron' );
			}

// Schedule if no existing cron event or settings have changed.
			if ( ! wp_next_scheduled( 'w3tc_minifycache_purge_wpcron' ) || $schedule_needs_update ) {
				$scheduled_timestamp_server = Util_Environment::get_cron_schedule_time( $new_wp_cron_time );
				wp_schedule_event( $scheduled_timestamp_server, $new_wp_cron_interval, 'w3tc_minifycache_purge_wpcron' );
			}
		} elseif ( wp_next_scheduled( 'w3tc_minifycache_purge_wpcron' ) ) {
			wp_clear_scheduled_hook( 'w3tc_minifycache_purge_wpcron' );
		}

return $data;
	}

/**
	 * Prints admin scripts for the general settings page.
	 *
	 * @return void
	 */
	public static function admin_print_scripts_w3tc_general() {
		$state = Dispatcher::config_state();
		if ( ! $state->get_boolean( 'minify.hide_minify_help' ) ) {
			wp_enqueue_script( 'w3tc-minify-help', plugins_url( 'Minify_GeneralPage_View_ShowHelp.js', W3TC_FILE ), array(), W3TC_VERSION, false );
		}
	}

/**
	 * Cleans up expired and unnecessary cache files.
	 *
	 * @return void
	 */
	public function cleanup() {
		$w3_cache_file_cleaner_generic = new Cache_File_Cleaner_Generic(
			array(
				'exclude'         => array(
					'*.files',
					'.htaccess',
					'index.html',
				),
				'cache_dir'       => Util_Environment::cache_blog_dir( 'minify' ),
				'expire'          => $this->_config->get_integer( 'minify.file.gc' ),
				'clean_timelimit' => $this->_config->get_integer( 'timelimit.cache_gc' ),
			)
		);

$w3_cache_file_cleaner_generic->clean();
	}

/**
	 * Collects and returns errors related to Minify configuration or usage.
	 *
	 * @param array $errors Existing errors.
	 *
	 * @return array Updated list of errors.
	 */
	public function w3tc_errors( $errors ) {
		$c     = Dispatcher::config();
		$state = Dispatcher::config_state_master();

// Minify error occured.
		if ( $state->get_boolean( 'minify.show_note_minify_error' ) ) {
			$errors['minify_error_creating'] = sprintf(
				// Translators: 1 last minify error, 2 dismiss button.
				__(
					'Recently an error occurred while creating the CSS / JS minify cache: %1$s. %2$s',
					'w3-total-cache'
				),
				$state->get_string( 'minify.error.last' ),
				Util_Ui::button_hide_note2(
					array(
						'w3tc_default_config_state_master' => 'y',
						'key'                              => 'minify.show_note_minify_error',
						'value'                            => 'false',
					)
				)
			);
		}

if ( 'memcached' === $c->get_string( 'minify.engine' ) ) {
			$memcached_servers         = $c->get_array( 'minify.memcached.servers' );
			$memcached_binary_protocol = $c->get_boolean( 'minify.memcached.binary_protocol' );
			$memcached_username        = $c->get_string( 'minify.memcached.username' );
			$memcached_password        = $c->get_string( 'minify.memcached.password' );

if (
				! Util_Installed::is_memcache_available(
					$memcached_servers,
					$memcached_binary_protocol,
					$memcached_username,
					$memcached_password
				)
			) {
				if ( ! isset( $errors['memcache_not_responding.details'] ) ) {
					$errors['memcache_not_responding.details'] = array();
				}

$errors['memcache_not_responding.details'][] = sprintf(
					// Translators: 1 memcache servers.
					__(
						'Minify: %1$s.',
						'w3-total-cache'
					),
					implode( ', ', $memcached_servers )
				);
			}
		}

return $errors;
	}

/**
	 * Adds notes or messages related to Minify cache actions.
	 *
	 * @param array $notes Existing notes.
	 *
	 * @return array Updated notes.
	 */
	public function w3tc_notes( $notes ) {
		$state_note = Dispatcher::config_state();

// Show notification when minify needs to be emptied.
		if (
			$state_note->get_boolean( 'minify.show_note.need_flush' ) &&
			! is_network_admin() && // flushing doesnt work in network admin.
			! $this->_config->is_preview()
		) {
			$notes['minify_flush_needed'] = sprintf(
				// Translators: 1 empty cache button.
				__(
					'The setting change(s) made either invalidate the cached data or modify the behavior of the site. %1$s now to provide a consistent user experience.',
					'w3-total-cache'
				),
				Util_Ui::button_link(
					__( 'Empty the minify cache', 'w3-total-cache' ),
					Util_Ui::url( array( 'w3tc_flush_minify' => 'y' ) )
				)
			);
		}

return $notes;
	}

/**
	 * Handles the AJAX request for displaying Minify help.
	 *
	 * @return void
	 */
	public function w3tc_ajax_minify_help() {
		include W3TC_DIR . '/Minify_HelpPopup_View.php';
	}

/**
	 * Summarizes Minify usage statistics from history.
	 *
	 * @param array $summary Existing summary data.
	 * @param array $history Historical usage data.
	 *
	 * @return array Updated summary data.
	 */
	public function w3tc_usage_statistics_summary_from_history( $summary, $history ) {
		// memcached servers.
		$c = Dispatcher::config();
		if ( 'memcached' === $c->get_string( 'minify.engine' ) ) {
			$summary['memcached_servers']['minify'] = array(
				'servers'         => $c->get_array( 'minify.memcached.servers' ),
				'username'        => $c->get_string( 'minify.memcached.username' ),
				'password'        => $c->get_string( 'minify.memcached.password' ),
				'binary_protocol' => $c->get_boolean( 'minify.memcached.binary_protocol' ),
				'name'            => __( 'Minification', 'w3-total-cache' ),
			);
		} elseif ( 'redis' === $c->get_string( 'minify.engine' ) ) {
			$summary['redis_servers']['minify'] = array(
				'servers'  => $c->get_array( 'minify.redis.servers' ),
				'username' => $c->get_boolean( 'minify.redis.username' ),
				'dbid'     => $c->get_integer( 'minify.redis.dbid' ),
				'password' => $c->get_string( 'minify.redis.password' ),
				'name'     => __( 'Minification', 'w3-total-cache' ),
			);
		}

$e = $this->_config->get_string( 'minify.engine' );
		$a = array(
			'size_visible'     => ( 'file' === $e ),
			'requests_visible' => ! ( 'file' === $e && $this->_config->get_boolean( 'minify.rewrite' ) ),
		);

if ( ! isset( $summary['period']['timestamp_end'] ) ) {
			// summary requested, enough.
			$summary['minify'] = $a;
			return $summary;
		}

// get requests rate stats.
		if ( $a['requests_visible'] ) {
			// counters.
			$requests_total      = Util_UsageStatistics::sum( $history, 'minify_requests_total' );
			$original_length_css = Util_UsageStatistics::sum( $history, 'minify_original_length_css' );
			$output_length_css   = Util_UsageStatistics::sum( $history, 'minify_output_length_css' );

$original_length_js = Util_UsageStatistics::sum( $history, 'minify_original_length_js' );
			$output_length_js   = Util_UsageStatistics::sum( $history, 'minify_output_length_js' );

$a['requests_total']      = Util_UsageStatistics::integer( $requests_total );
			$a['requests_per_second'] = Util_UsageStatistics::value_per_period_seconds( $requests_total, $summary );
			$a['compression_css']     = Util_UsageStatistics::percent( $original_length_css - $output_length_css, $original_length_css );
			$a['compression_js']      = Util_UsageStatistics::percent( $original_length_js - $output_length_js, $original_length_js );
		}
		if ( $a['size_visible'] ) {
			list( $v, $should_count ) = Util_UsageStatistics::get_or_init_size_transient( 'w3tc_ustats_minify_size', $summary );
			if ( $should_count ) {
				$h     = Dispatcher::component( 'Minify_MinifiedFileRequestHandler' );
				$stats = $h->get_stats_size( $summary['timeout_time'] );

// build stats to show.
				$v['size_used']            = Util_UsageStatistics::bytes_to_size( $stats['css']['output_length'] + $stats['js']['output_length'] );
				$v['size_items']           = Util_UsageStatistics::integer( $stats['css']['items'] + $stats['js']['items'] );
				$v['size_compression_css'] = Util_UsageStatistics::percent( $stats['css']['original_length'] - $stats['css']['output_length'], $stats['css']['original_length'] );
				$v['size_compression_js']  = Util_UsageStatistics::percent( $stats['js']['original_length'] - $stats['js']['output_length'], $stats['js']['original_length'] );

set_transient( 'w3tc_ustats_pagecache_size', $v, 120 );
			}

if ( isset( $v['size_used'] ) ) {
				$a['size_used']            = $v['size_used'];
				$a['size_items']           = empty( $v['size_items'] ) ? null : $v['size_items'];
				$a['size_compression_css'] = empty( $v['size_compression_css'] ) ? null : $v['size_compression_css'];
				$a['size_compression_js']  = empty( $v['size_compression_js'] ) ? null : $v['size_compression_js'];
			}
		}

$summary['minify'] = $a;

return $summary;
	}
}