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<?php

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/**

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* Deprecated hooks.

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* It's created based on WC_Deprecated_Hooks.

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* @since 3.9.6

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* @package Deprecated_Hooks

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namespace Smush\Core;

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defined( 'ABSPATH' ) || exit;

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/**

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* Handles deprecation notices and triggering of legacy action hooks.

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class Deprecated_Hooks {

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/**

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* Array of deprecated actions hooks we need to handle. Format of 'new' => 'old'.

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* @var array

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private $deprecated_action_hooks = array(

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'wp_smush_before_smush_file' => 'smush_s3_integration_fetch_file',

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'wp_smush_after_remove_file' => 'smush_s3_backup_remove',

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);

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/**

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* Array of deprecated filters hooks we need to handle. Format of 'new' => 'old'.

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* @var array

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private $deprecated_filter_hooks = array(

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'wp_smush_backup_exists' => 'smush_backup_exists',

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'wp_smush_file_exists' => 'smush_file_exists',

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);

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/**

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* Array of versions on each hook has been deprecated.

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* @var array

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private $deprecated_version = array(

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'smush_backup_exists' => '3.9.6',

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'smush_s3_integration_fetch_file' => '3.9.6',

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'smush_s3_backup_remove' => '3.9.6',

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'smush_file_exists' => '3.9.6',

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);

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/**

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* Is action hook.

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* @var bool

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private $is_action;

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/**

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* Constructor.

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* Hook into the new hook so we can handle deprecated hooks once fired.

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public function __construct() {

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$deprecated_hooks = array_merge( array_keys( $this->deprecated_action_hooks ), array_keys( $this->deprecated_filter_hooks ) );

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if ( $deprecated_hooks ) {

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foreach ( $deprecated_hooks as $new_action ) {

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add_filter( $new_action, array( $this, 'maybe_handle_deprecated_hook' ), -1000, 8 );

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}

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}

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}

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/**

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* Get old hooks to map to new hook.

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* @param string $new_hook New hook name.

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* @return array

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private function get_old_hooks( $new_hook ) {

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$old_hooks = array();

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if ( isset( $this->deprecated_action_hooks[ $new_hook ] ) ) {

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$old_hooks = $this->deprecated_action_hooks[ $new_hook ];

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$this->is_action = true;

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} elseif ( isset( $this->deprecated_filter_hooks[ $new_hook ] ) ) {

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$old_hooks = $this->deprecated_filter_hooks[ $new_hook ];

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// reset hook type.

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$this->is_action = null;

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}

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return is_array( $old_hooks ) ? $old_hooks : array( $old_hooks );

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}

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/**

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* If the hook is Deprecated, call the old hooks here.

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public function maybe_handle_deprecated_hook() {

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$new_hook = current_filter();

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$new_callback_args = func_get_args();

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$return_value = $new_callback_args[0];

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$old_hooks = $this->get_old_hooks( $new_hook );

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if ( $old_hooks ) {

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foreach ( $old_hooks as $old_hook ) {

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if ( has_filter( $old_hook ) ) {

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$this->display_notice( $old_hook, $new_hook );

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$return_value = $this->trigger_hook( $old_hook, $new_callback_args );

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}

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}

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}

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return $return_value;

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}

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/**

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* Display a deprecated notice for old hooks.

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* @param string $old_hook Old hook.

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* @param string $new_hook New hook.

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protected function display_notice( $old_hook, $new_hook ) {

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_deprecated_hook( esc_html( $old_hook ), esc_html( $this->get_deprecated_version( $old_hook ) ), esc_html( $new_hook ) );

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}

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/**

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* Fire off a legacy hook with it's args.

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* @param string $old_hook Old hook name.

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* @param array $new_callback_args New callback args.

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* @return mixed|void

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protected function trigger_hook( $old_hook, $new_callback_args ) {

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if ( $this->is_action ) {

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do_action_ref_array( $old_hook, $new_callback_args );

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} else {

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return apply_filters_ref_array( $old_hook, $new_callback_args );

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}

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}

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/**

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* Get deprecated version.

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* @param string $old_hook Old hook name.

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* @return string

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protected function get_deprecated_version( $old_hook ) {

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return ! empty( $this->deprecated_version[ $old_hook ] ) ? $this->deprecated_version[ $old_hook ] : WP_SMUSH_VERSION;

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}

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}

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