<?php

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/**

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* S3 integration: S3 class

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*

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* Minimum supported version - Offload Media 2.4

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*

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* @package Smush\Core\Modules\Integrations

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* @subpackage S3

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* @since 2.7

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*

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* @author Umesh Kumar <umesh@incsub.com>

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*

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* @copyright (c) 2017, Incsub (http://incsub.com)

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*/

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namespace Smush\Core\Integrations;

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use Amazon_S3_And_CloudFront;

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use DeliciousBrains\WP_Offload_Media\Items\Media_Library_Item;

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use Smush\App\Admin;

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use Smush\Core\Helper;

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use Smush\Core\Settings;

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use WP_Smush;

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if ( ! defined( 'WPINC' ) ) {

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die;

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}

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/**

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* Class S3

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*/

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class S3 extends Abstract_Integration {

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/**

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* Save list of files need to remove

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* when user enabling "Remove Files From Server".

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*

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* @var array

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*/

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private $files_to_remove = array();

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/**

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* Cache list of files download failed.

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*

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* @var array

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*/

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private $files_download_failed = array();

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/**

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* On Smush mode, we will disable auto download and auto-upload

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* while working with Smush.

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*

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* @var boolean

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*/

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private $on_smush_mode;

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/**

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* Cache list of files to delete via remove_file method.

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*

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* @var array

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*/

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private $doing_files;

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/**

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* Cache list of filters for get_attached_file.

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*

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* @var null|array

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*/

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private $list_file_filters;

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/**

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* S3 constructor.

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*/

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public function __construct() {

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$this->module = 's3';

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$this->class = 'pro';

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$this->enabled = function_exists( 'as3cf_init' ) || function_exists( 'as3cf_pro_init' );

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parent::__construct();

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// Hook at the end of setting row to output a error div.

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add_action( 'smush_setting_column_right_inside', array( $this, 's3_setup_message' ), 15 );

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// Show S3 integration message, if user hasn't enabled it.

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add_action( 'wp_smush_header_notices', array( $this, 'show_s3_support_required_notice' ) );

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// Add Pro tag.

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if ( ! WP_Smush::is_pro() || ! $this->enabled ) {

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add_action( 'smush_setting_column_tag', array( $this, 'add_pro_tag' ) );

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}

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// Do not continue if not enabled or S3 Offload plugin is not installed.

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if ( ! $this->is_active() ) {

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return;

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}

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// Load all our custom actions/filters after loading as3cf.

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if ( did_action( 'as3cf_init' ) ) {

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$this->init();

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} else {

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add_action( 'as3cf_init', array( $this, 'init' ) );

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}

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}

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/**

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* Register actions, filters for S3.

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*

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* @since 3.9.6

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*/

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public function init() {

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// TODO: (stats refactor) we still need some of the stuff from this controller e.g. notices

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return;

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global $as3cf;

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// Check file exists.

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add_filter( 'wp_smush_file_exists', array( $this, 'file_exists_on_s3' ), 10, 4 );

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// Get attached file.

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add_filter( 'wp_smush_get_attached_file', array( $this, 'get_attached_file' ), 10, 5 );

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// Check unique file with the backup file.

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add_filter( 'wp_unique_filename', array( $this, 'filter_unique_filename' ), 99, 3 );// S3 is using priority 10.

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// Check if the file exists for the given path and download.

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add_action( 'wp_smush_before_restore_backup', array( $this, 'maybe_download_file' ), 10, 2 );

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// Update original source path of as3cf_items after converting PNG to JPG.

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add_action( 'wp_smush_image_url_changed', array( $this, 'update_original_source_path_after_png2jpg' ), 10, 4 );

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// Update original source path of as3cf_items after restore the converted PNG2JPG file.

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add_action( 'wp_smush_image_url_updated', array( $this, 'update_original_source_path_after_restore_png' ), 10, 3 );

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// If user is enabling copy to S3.

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if ( $as3cf->get_setting( 'copy-to-s3' ) ) {

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/**

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* Activate Smush mode (Disable auto download and upload attachments).

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*

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* Note, we managed to release this mode by using Helper::wp_update_attachment_metadata() or

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* via action "wp_smush_after_smush_file"

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*/

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// Activate smush mode before smushing/restoring.

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add_action( 'wp_smush_before_smush_file', array( $this, 'activate_smush_mode' ), 1 );

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add_action( 'wp_smush_before_restore_backup', array( $this, 'activate_smush_mode' ), 1 );

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/**

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* When WP create a new attachment, S3 will try to upload it to the server,

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* and then it will upload the thumbnails later after regenerating the thumbnails.

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* So we use this filter to temporary disable upload if smush can do with this file.

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*

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* Note, if we don't work with the current image, e.g animated file,

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* we managed to release this mode by using maybe_release_smush_mode.

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*/

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add_filter( 'wp_update_attachment_metadata', array( $this, 'maybe_active_smush_mode' ), 1, 2 );

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// Reset smush mode after smushing/restoring.

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add_action( 'wp_smush_after_smush_file', array( $this, 'release_smush_mode' ) );

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add_action( 'wp_smush_after_restore_backup', array( $this, 'release_smush_mode' ) );

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/**

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* Make sure we exit Smush mode before updating the metadata,

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* this will help we to upload the attachments, and remove them if it's required.

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*/

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add_action( 'wp_smush_before_update_attachment_metadata', array( $this, 'release_smush_mode' ) );

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// Release mode when we don't smush the image.

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add_action( 'wp_smush_no_smushit', array( $this, 'maybe_release_smush_mode' ) );

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// Remove .bak file after restoring, and JPG files after restoring PNG file.

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add_action( 'wp_smush_after_remove_file', array( $this, 'remove_file' ), 10, 3 );

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// Make sure we removed all downloaded files.

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add_filter( 'shutdown', array( $this, 'maybe_remove_downloaded_files' ), 10, 2 );

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}

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}

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/**

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* Disable module functionality if not PRO.

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*

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* @return bool

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*/

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public function setting_status() {

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return ! WP_Smush::is_pro() ? true : ! $this->enabled;

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}

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/**************************************

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*

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* OVERWRITE PARENT CLASS FUNCTIONALITY

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*/

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/**

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* Filters the setting variable to add S3 setting title and description.

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*

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* @param array $settings Settings array.

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*

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* @return array

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*/

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public function register( $settings ) {

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$plugin_url = esc_url( 'https://wordpress.org/plugins/amazon-s3-and-cloudfront/' );

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$settings[ $this->module ] = array(

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'label' => __( 'Enable Amazon S3 support', 'wp-smushit' ),

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'short_label' => __( 'Amazon S3', 'wp-smushit' ),

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'desc' => sprintf( /* translators: %1$s - <a>, %2$s - </a> */

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esc_html__(

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"Storing your image on S3 buckets using %1\$sWP Offload Media%2\$s? Smush can detect and smush those assets for you, including when you're removing files from your host server.",

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'wp-smushit'

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),

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"<a href='$plugin_url' target = '_blank'>",

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'</a>'

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),

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);

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return $settings;

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}

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/**************************************

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*

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* PUBLIC CLASSES

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*/

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/**

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* Check if the file is served by S3 and download the file for given path

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*

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* @param string $file_path Full file path.

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* @param string $attachment_id Attachment ID.

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*

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* @return bool|string False/ File Path

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*/

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public function maybe_download_file( $file_path, $attachment_id ) {

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// Download the backup file if it doesn't exist on the server.

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return $this->download_file( $file_path, $attachment_id );

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}

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/**

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* Checks if the given attachment is on S3 or not, Returns S3 URL or WP Error

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*

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* @param string $attachment_id Attachment ID.

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*

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* @return bool

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*/

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public function is_image_on_s3( $attachment_id = '' ) {

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if ( empty( $attachment_id ) ) {

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return false;

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}

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// If the file path contains S3, get the s3 URL for the file.

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if ( function_exists( 'as3cf_get_attachment_url' ) ) {

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return as3cf_get_attachment_url( $attachment_id );

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}

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Helper::logger()->integrations()->error( 'S3 - Function as3cf_get_attachment_url does not exists.' );

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return false;

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}

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/**

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* Checks if file exits on S3.

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*

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* @param bool $exists If file exists on S3.

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* @param mixed $file_path File path or empty value.

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* @param string $attachment_id Attachment ID.

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* @param bool $should_download Should download attachment.

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*

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* @return bool|string Returns TRUE OR File path if it exists, FALSE otherwise.

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*/

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public function file_exists_on_s3( $exists, $file_path, $attachment_id, $should_download ) {

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if ( ! $exists ) {

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if ( empty( $file_path ) ) {

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// Maybe file is not uploaded to provider, try to get the raw file path.

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$file_path = $this->get_raw_attached_file( $attachment_id );

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}

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$exists = file_exists( $file_path );

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}

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if ( ! $exists ) {

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if ( $should_download ) {

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$exists = $this->download_file( $file_path, $attachment_id );

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} else {

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$exists = $this->does_image_exists( $attachment_id, $file_path );

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}

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}

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return $exists;

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}

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/**

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* Error message to show when S3 support is required.

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*

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* Show a error message to admins, if they need to enable S3 support. If "remove files from

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* server" option is enabled in WP Offload Media plugin, we need WP Smush Pro to enable S3 support.

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*/

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public function show_s3_support_required_notice() {

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// Do not display it for other users. Do not display on network screens, if network-wide option is disabled.

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if ( ! current_user_can( 'manage_options' ) || ! Settings::can_access( 'integrations' ) ) {

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return;

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}

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// If already dismissed, do not show.

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if ( '1' === get_site_option( 'wp-smush-hide_s3support_alert' ) ) {

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return;

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}

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// Return early, if support is not required.

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if ( ! $this->s3_support_required() ) {

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return;

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}

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// Settings link.

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$settings_link = is_multisite() && is_network_admin()

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? network_admin_url( 'admin.php?page=smush-integrations' )

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: menu_page_url( 'smush-integrations', false );

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if ( WP_Smush::is_pro() ) {

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/**

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* If premium user, but S3 support is not enabled.

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*/

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$message = sprintf(

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/* Translators: %1$s: opening strong tag, %2$s: closing strong tag, %s: settings link, %3$s: opening a and strong tags, %4$s: closing a and strong tags */

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__(

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'We can see you have WP Offload Media installed. If you want to optimize your S3 images, you’ll need to enable the %3$sAmazon S3 Support%4$s feature in Smush’s Integrations.',

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'wp-smushit'

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),

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'<strong>',

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'</strong>',

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"<a href='$settings_link'><strong>",

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'</strong></a>'

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);

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} else {

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/**

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* If not a premium user.

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*/

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$message = sprintf(

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/* Translators: %1$s: opening strong tag, %2$s: closing strong tag, %s: settings link, %3$s: opening a and strong tags, %4$s: closing a and strong tags */

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__(

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"We can see you have WP Offload Media installed. If you want to optimize your S3 images you'll need to %3\$supgrade to Smush Pro%4\$s",

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'wp-smushit'

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),

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'<strong>',

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'</strong>',

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'<a href=' . esc_url( 'https://wpmudev.com/project/wp-smush-pro' ) . '><strong>',

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'</strong></a>'

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);

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}

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$message = '<p>' . $message . '</p>';

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echo '<div role="alert" id="wp-smush-s3support-alert" class="sui-notice" data-message="' . esc_attr( $message ) . '" aria-live="assertive"></div>';

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}

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/**

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* Prints the message for S3 setup

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*

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* @param string $setting_key Settings key.

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*/

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public function s3_setup_message( $setting_key ) {

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// Return if not S3.

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if ( $this->module !== $setting_key ) {

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return;

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}

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/**

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* Amazon_S3_And_CloudFront global.

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*

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* @var Amazon_S3_And_CloudFront $as3cf

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*/

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global $as3cf;

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// If S3 integration is not enabled, return.

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$setting_val = WP_Smush::is_pro() ? $this->settings->get( $this->module ) : 0;

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// If integration is disabled when S3 offload is active, do not continue.

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if ( ! $setting_val && is_object( $as3cf ) ) {

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return;

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}

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// If S3 offload global variable is not available, plugin is not active.

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if ( ! is_object( $as3cf ) ) {

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$class = '';

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$message = __( 'To use this feature you need to install WP Offload Media and have an Amazon S3 account setup.', 'wp-smushit' );

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} elseif ( ! method_exists( $as3cf, 'is_plugin_setup' ) || ! method_exists( $as3cf, 'get_plugin_page_url' ) ) {

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// Check if in case for some reason, we couldn't find the required function.

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$class = ' sui-notice-warning';

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$message = sprintf( /* translators: %1$s: opening a tag, %2$s: closing a tag */

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esc_html__(

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'We are having trouble interacting with WP Offload Media, make sure the plugin is activated. Or you can %1$sreport a bug%2$s.',

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'wp-smushit'

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),

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'<a href="' . esc_url( 'https://wpmudev.com/contact' ) . '" target="_blank">',

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'</a>'

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);

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} elseif ( ! $as3cf->is_plugin_setup() ) {

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// Plugin is not setup, or some information is missing.

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$class = ' sui-notice-warning';

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$message = sprintf( /* translators: %1$s: opening a tag, %2$s: closing a tag */

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esc_html__(

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'It seems you haven’t finished setting up WP Offload Media yet. %1$sConfigure it now%2$s to enable Amazon S3 support.',

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'wp-smushit'

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),

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'<a href="' . $as3cf->get_plugin_page_url() . '" target="_blank">',

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'</a>'

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);

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} else {

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// S3 support is active.

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$class = ' sui-notice-info';

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$message = __( 'Amazon S3 support is active.', 'wp-smushit' );

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}

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?>

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

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<div class="sui-notice<?php echo esc_attr( $class ); ?>">

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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( $message ); ?></p>

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</div>

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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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/**

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* Add a pro tag next to the setting title.

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*

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* @param string $setting_key Setting key name.

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*

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* @since 3.4.0

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*/

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public function add_pro_tag( $setting_key ) {

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// Return if not NextGen integration.

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if ( $this->module !== $setting_key || WP_Smush::is_pro() ) {

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return;

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}

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?>

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<span class="sui-tag sui-tag-pro">

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<?php esc_html_e( 'Pro', 'wp-smushit' ); ?>

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</span>

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<?php

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}

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/**

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* Disable auto downloading the file to local while Smush doing, only allow it with our custom methods:

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* Helper::get_attached_file( $attachment_id, $type='smush|resize|original')

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* or Helper::exists_or_downloaded( $file, $attachment_id ),

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* and set wait_for_generate_attachment_metadata is TRUE to disable auto upload attachments while

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* we are working with it.

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*

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* @since 3.4.0

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*

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* @since 3.9.6

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* Enable copy file back to local and wait_for_generate_attachment_metadata while we working with smush or restore.

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*/

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public function activate_smush_mode() {

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if ( $this->is_active() && ! $this->on_smush_mode ) {

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global $as3cf;

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// Save mode.

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$this->on_smush_mode = true;

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/**

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* Disable auto download to local, we only enable it via self::downoad_file method to avoid automatic download link.

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* e.g. wp_attachment_is_image()

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*/

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add_filter( 'as3cf_get_attached_file_copy_back_to_local', '__return_false', 9998 );

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// Disable auto upload attachments.

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add_filter( 'as3cf_wait_for_generate_attachment_metadata', '__return_true', 9998 );

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// If user enabling remove file on local.

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if ( $as3cf && $as3cf->get_setting( 'remove-local-file' ) ) {

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// We don't remove the filter because it might be called later.

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add_filter( 'as3cf_upload_attachment_local_files_to_remove', array( $this, 'remove_missing_files_to_avoid_error_log_from_s3' ), 99 );

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}

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}

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}

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/**

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* Set Smush mode while creating a new image.

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*

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* @param array $image_meta Image meta.

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* @param int $attachment_id Attachment ID.

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* @return array The provided metadata.

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*/

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public function maybe_active_smush_mode( $image_meta, $attachment_id ) {

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if (

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! $this->on_smush_mode

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// When async uploading or the image is created from Gutenberg, activate smush mode.

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&& empty( $new_meta['sizes'] )

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&& ! empty( $image_meta['file'] )

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&& ( isset( $_POST['post_id'] ) || isset( $_FILES['async-upload'] ) || ! Helper::is_non_rest_media() )

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// If enabling auto-smush.

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&& $this->settings->get( 'auto' )

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// Managed it.

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&& ! did_action( 'wp_smush_before_smush_file' )

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// Managed it.

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&& ! did_action( 'wp_smush_before_restore_backup' )

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// Managed it.

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&& ! did_action( 'wp_smush_before_update_attachment_metadata' )

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// Don't smush it.

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&& ! did_action( 'wp_smush_no_smushit' )

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// Only support Image.

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&& Helper::is_smushable( $attachment_id )

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// Make sure we only disable while async upload new image.

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&& ! $this->does_image_exists( $attachment_id, $this->get_raw_attached_file( $attachment_id, 'original' ) )

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) {

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$this->activate_smush_mode();

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}

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return $image_meta;

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}

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/**

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