<?php

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namespace Smush\Core;

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class Cache_Controller extends Controller {

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const SHOW_CACHE_NOTICE_TRANSIENT = 'wp_smush_show_cache_notice';

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const CLEAR_CACHE_ACTION = 'wp_smush_clear_page_cache';

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public function __construct() {

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$this->register_action( 'wp_smush_webp_status_changed', array( $this, 'webp_status_changed' ) );

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$this->register_action( 'wp_smush_webp_method_changed', array( $this, 'webp_method_changed' ) );

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$this->register_action( 'wp_smush_cdn_status_changed', array( $this, 'cdn_status_changed' ) );

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// TODO: identify other cases where cache should be cleared and call the clear_third_party_cache method

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$this->register_action( 'wp_ajax_smush_dismiss_cache_notice', array( $this, 'dismiss_cache_notice' ) );

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$this->register_action( 'wp_smush_header_notices', array( $this, 'maybe_show_cache_notice' ) );

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}

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public function cdn_status_changed() {

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$this->clear_third_party_cache( 'cdn' );

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}

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public function webp_method_changed() {

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$this->clear_third_party_cache( 'webp_method' );

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}

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public function webp_status_changed() {

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$this->clear_third_party_cache( 'webp' );

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}

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private function clear_third_party_cache( $notice_key = '' ) {

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do_action( self::CLEAR_CACHE_ACTION );

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if ( ! has_action( self::CLEAR_CACHE_ACTION ) && $notice_key ) {

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// If no one is handling the cache clearing then show a notice

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set_transient( self::SHOW_CACHE_NOTICE_TRANSIENT, $notice_key );

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}

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}

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public function dismiss_cache_notice() {

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check_ajax_referer( 'wp-smush-ajax' );

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// Check for permission.

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if ( ! Helper::is_user_allowed( 'manage_options' ) ) {

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wp_die( esc_html__( 'Unauthorized', 'wp-smushit' ), 403 );

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}

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delete_transient( self::SHOW_CACHE_NOTICE_TRANSIENT );

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wp_send_json_success();

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}

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public function maybe_show_cache_notice() {

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$notice = $this->get_cache_notice();

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if ( empty( $notice ) ) {

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return;

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}

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?>

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<div class="sui-notice sui-notice-info" id="wp-smush-cache-notice">

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<div class="sui-notice-content">

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<div class="sui-notice-message">

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<i class="sui-notice-icon sui-icon-info" aria-hidden="true"></i>

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<p><?php echo wp_kses_post( $notice ); ?></p>

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</div>

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<div class="sui-notice-actions">

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<button class="sui-button-icon smush-dismiss-notice-button">

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<i class="sui-icon-check" aria-hidden="true"></i>

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<span class="sui-screen-reader-text"><?php esc_html_e( 'Dismiss', 'wp-smushit' ); ?></span>

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</button>

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</div>

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</div>

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</div>

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<?php

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}

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private function get_cache_notice() {

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$notice_key = get_transient( self::SHOW_CACHE_NOTICE_TRANSIENT );

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if ( empty( $notice_key ) ) {

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return;

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}

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$settings = Settings::get_instance();

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if ( 'cdn' === $notice_key ) {

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return $settings->has_cdn_page() ? __( 'CDN status has changed.<br/>If you have a page caching plugin or server caching, please clear it to ensure everything works as expected.', 'wp-smushit' ) : '';

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}

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if ( 'webp' === $notice_key || 'webp_method' === $notice_key ) {

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$notice = 'webp' === $notice_key ? __( 'Local WebP status has changed.<br/>If you have a page caching plugin or server caching, please clear it to ensure everything works as expected.', 'wp-smushit' ) :

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__( 'Local WebP method has been updated.<br/>If you have a page caching plugin or server caching, please clear it to ensure everything works as expected.', 'wp-smushit' );

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return $settings->has_webp_page() ? $notice : '';

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}

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}

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}

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