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<?php

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/**

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* Smush directory smush scanner: DScanner class

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* @package Smush\Core\Modules\Helpers

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* @since 2.8.1

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* @author Anton Vanyukov <anton@incsub.com>

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namespace Smush\Core\Modules\Helpers;

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use WP_Smush;

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if ( ! defined( 'ABSPATH' ) ) {

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exit;

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}

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/**

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* Class DScanner

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* @since 2.8.1

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class DScanner {

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/**

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* Indicates if a scan is in process

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* @var bool

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private $is_scanning = false;

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/**

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* Indicates the current step being scanned

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* @var int

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private $current_step = 0;

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/**

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* Options names

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const IS_SCANNING_SLUG = 'wp-smush-files-scanning';

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const CURRENT_STEP = 'wp-smush-scan-step';

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/**

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* Refresh status variables.

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private function refresh_status() {

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$this->is_scanning = get_transient( self::IS_SCANNING_SLUG );

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$this->current_step = (int) get_option( self::CURRENT_STEP );

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}

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/**

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* Initializes the scan.

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public function init_scan() {

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set_transient( self::IS_SCANNING_SLUG, true, 60 * 5 ); // 5 minutes max

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update_option( self::CURRENT_STEP, 0 );

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$this->refresh_status();

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}

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/**

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* Reset the scan as if it weren't being executed (on finish and cancel).

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public function reset_scan() {

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delete_transient( self::IS_SCANNING_SLUG );

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delete_option( self::CURRENT_STEP );

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$this->refresh_status();

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}

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/**

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* Update the current step being scanned.

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* @param int $step Current scan step.

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public function update_current_step( $step ) {

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update_option( self::CURRENT_STEP, absint( $step ) );

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$this->refresh_status();

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}

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/**

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* Get the current scan step being scanned.

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* @return mixed

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public function get_current_scan_step() {

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$this->refresh_status();

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return $this->current_step;

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}

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/**

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* Return the number of total steps to finish the scan.

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* @return int

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public function get_scan_steps() {

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return count( WP_Smush::get_instance()->core()->mod->dir->get_scanned_images() );

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}

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/**

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* Check if a scanning is in process

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* @return bool

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public function is_scanning() {

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$this->refresh_status();

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return $this->is_scanning;

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}

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}

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