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Editing: class-installer.php

<?php
/**
 * Smush installer (update/upgrade procedures): Installer class
 *
 * @package Smush\Core
 * @since 2.8.0
 *
 * @author Anton Vanyukov <anton@incsub.com>
 *
 * @copyright (c) 2018, Incsub (http://incsub.com)
 */

namespace Smush\Core;

use WP_Smush;

if ( ! defined( 'WPINC' ) ) {
	die;
}

/**
 * Class Installer for handling updates and upgrades of the plugin.
 *
 * @since 2.8.0
 */
class Installer {

/**
	 * Triggered on Smush deactivation.
	 *
	 * @since 3.1.0
	 */
	public static function smush_deactivated() {
		if ( ! class_exists( '\\Smush\\Core\\Modules\\CDN' ) ) {
			require_once __DIR__ . '/modules/class-cdn.php';
		}

Modules\CDN::unschedule_cron();
	}

/**
	 * Check if a existing install or new.
	 *
	 * @since 2.8.0  Moved to this class from wp-smush.php file.
	 */
	public static function smush_activated() {
		if ( ! defined( 'WP_SMUSH_ACTIVATING' ) ) {
			define( 'WP_SMUSH_ACTIVATING', true );
		}

$version = get_site_option( WP_SMUSH_PREFIX . 'version' );

if ( ! class_exists( '\\Smush\\Core\\Settings' ) ) {
			require_once __DIR__ . '/class-settings.php';
		}

Settings::get_instance()->init();
		$settings = Settings::get_instance()->get();

// If the version is not saved or if the version is not same as the current version,.
		if ( ! $version || WP_SMUSH_VERSION !== $version ) {
			global $wpdb;
			// Check if there are any existing smush stats.
			$results = $wpdb->get_var(
				$wpdb->prepare(
					"SELECT meta_id FROM {$wpdb->postmeta} WHERE meta_key=%s LIMIT 1",
					'wp-smpro-smush-data'
				)
			); // db call ok; no-cache ok.

if ( $results || ( isset( $settings['auto'] ) && false !== $settings['auto'] ) ) {
				update_site_option( 'wp-smush-install-type', 'existing' );
			}

// Create directory smush table.
			self::directory_smush_table();

// Store the plugin version in db.
			update_site_option( WP_SMUSH_PREFIX . 'version', WP_SMUSH_VERSION );
		}
	}

/**
	 * Handle plugin upgrades.
	 *
	 * @since 2.8.0
	 */
	public static function upgrade_settings() {
		// Avoid to execute this over an over in same thread.
		if ( defined( 'WP_SMUSH_ACTIVATING' ) || ( defined( 'WP_SMUSH_UPGRADING' ) && WP_SMUSH_UPGRADING ) ) {
			return;
		}

$version = get_site_option( WP_SMUSH_PREFIX . 'version' );

if ( false === $version ) {
			self::smush_activated();
		}

if ( false !== $version && WP_SMUSH_VERSION !== $version ) {
			if ( ! defined( 'WP_SMUSH_UPGRADING' ) ) {
				define( 'WP_SMUSH_UPGRADING', true );
			}

if ( version_compare( $version, '3.7.0', '<' ) ) {
				self::upgrade_3_7_0();
			}

if ( version_compare( $version, '3.8.0', '<' ) ) {
				// Delete the flag for hiding the BF modal because it was removed.
				delete_site_option( WP_SMUSH_PREFIX . 'hide_blackfriday_modal' );
			}

if ( version_compare( $version, '3.8.3', '<' ) ) {
				// Delete this unused setting, leftover from old smush.
				delete_option( WP_SMUSH_PREFIX . 'transparent_png' );
			}

if ( version_compare( $version, '3.8.4', '<' ) ) {
				// Delete the flag to hide a removed tutorial element.
				delete_option( WP_SMUSH_PREFIX . 'hide_tutorials_from_bulk_smush' );
				delete_site_option( WP_SMUSH_PREFIX . 'hide_tutorials_from_bulk_smush' );
			}

// Create/upgrade directory smush table.
			self::directory_smush_table();

// Store the latest plugin version in db.
			update_site_option( WP_SMUSH_PREFIX . 'version', WP_SMUSH_VERSION );
		}
	}

/**
	 * Create or upgrade custom table for directory Smush.
	 *
	 * After creating or upgrading the custom table, update the path_hash
	 * column value and structure if upgrading from old version.
	 *
	 * @since 2.9.0
	 */
	public static function directory_smush_table() {
		if ( ! class_exists( '\\Smush\\Core\\Modules\\Abstract_Module' ) ) {
			require_once __DIR__ . '/modules/class-abstract-module.php';
		}

if ( ! class_exists( '\\Smush\\Core\\Modules\\Dir' ) ) {
			require_once __DIR__ . '/modules/class-dir.php';
		}

// No need to continue on sub sites.
		if ( ! Modules\Dir::should_continue() ) {
			return;
		}

// Create a class object, if doesn't exists.
		if ( ! is_object( WP_Smush::get_instance()->core()->mod->dir ) ) {
			WP_Smush::get_instance()->core()->mod->dir = new Modules\Dir();
		}

// Create/upgrade directory smush table.
		WP_Smush::get_instance()->core()->mod->dir->create_table();
	}

/**
	 * Upgrade to 3.7.0
	 *
	 * @since 3.7.0
	 */
	private static function upgrade_3_7_0() {
		delete_site_option( WP_SMUSH_PREFIX . 'run_recheck' );

// Fix the "None" animation in lazy-load options.
		$lazy = Settings::get_instance()->get_setting( WP_SMUSH_PREFIX . 'lazy_load' );

if ( ! $lazy || ! isset( $lazy['animation'] ) || ! isset( $lazy['animation']['selected'] ) ) {
			return;
		}

if ( '0' === $lazy['animation']['selected'] ) {
			$lazy['animation']['selected'] = 'none';
			Settings::get_instance()->set_setting( WP_SMUSH_PREFIX . 'lazy_load', $lazy );
		}
	}
}

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