<?php

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namespace ImageOptimization\Modules\Stats\Components;

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use ImageOptimization\Classes\Async_Operation\{

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Async_Operation,

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Async_Operation_Hook,

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Async_Operation_Queue,

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Exceptions\Async_Operation_Exception,

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};

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use ImageOptimization\Classes\Logger;

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use ImageOptimization\Modules\Stats\Classes\Optimization_Stats;

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if ( ! defined( 'ABSPATH' ) ) {

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exit; // Exit if accessed directly.

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}

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class Optimization_Stats_Handler {

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/**

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* @async

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*

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* @param $page

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* @param $pages_count

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* @param $output

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*

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* @return void

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*/

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public function handle_stats_chunk( $page, $pages_count, $output ) {

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$chunk = Optimization_Stats::get_image_stats_chunk( $page );

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foreach ( array_keys( $chunk ) as $key ) {

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if ( isset( $output[ $key ] ) ) {

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$output[ $key ] += $chunk[ $key ];

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continue;

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}

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$output[ $key ] = $chunk[ $key ];

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}

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if ( $page < $pages_count ) {

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try {

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Async_Operation::create(

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Async_Operation_Hook::CALCULATE_OPTIMIZATION_STATS,

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[

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'page' => $page + 1,

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'pages_count' => $pages_count,

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'output' => $output,

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],

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Async_Operation_Queue::STATS

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);

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} catch ( Async_Operation_Exception $aoe ) {

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Logger::log( Logger::LEVEL_ERROR, 'Error while creating a stats calculation task: ' . $aoe->getMessage() );

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}

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} else {

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unset( $output['pages'] );

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Optimization_Stats::set_stored_stats( $output );

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}

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}

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public function __construct() {

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add_action( Async_Operation_Hook::CALCULATE_OPTIMIZATION_STATS, [ $this, 'handle_stats_chunk' ], 10, 3 );

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}

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}

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