<?php
defined( 'ABSPATH' ) || die( 'Cheatin&#8217; uh?' );

add_action( 'admin_init', '_imagify_upgrader' );
/**
 * Tell WP what to do when admin is loaded aka upgrader.
 *
 * @since 1.0
 */
function _imagify_upgrader() {
	// Back-compat' with previous version of the upgrader.
	imagify_upgrader_upgrade();

	// Version stored on the network.
	$network_version = Imagify_Options::get_instance()->get( 'version' );
	// Version stored at the site level.
	$site_version    = Imagify_Data::get_instance()->get( 'version' );

	// First install (network).
	if ( ! $network_version ) {
		/**
		 * Triggered on Imagify first install (network).
		 *
		 * @since  1.7
		 * @author Grégory Viguier
		 */
		do_action( 'imagify_first_network_install' );
	}
	// Already installed but got updated (network).
	elseif ( IMAGIFY_VERSION !== $network_version ) {
		/**
		 * Triggered on Imagify upgrade (network).
		 *
		 * @since  1.7
		 * @author Grégory Viguier
		 *
		 * @param string $network_version Previous version stored on the network.
		 * @param string $site_version    Previous version stored on site level.
		 */
		do_action( 'imagify_network_upgrade', $network_version, $site_version );
	}

	// If any upgrade has been done, we flush and update version.
	if ( did_action( 'imagify_first_network_install' ) || did_action( 'imagify_network_upgrade' ) ) {
		Imagify_Options::get_instance()->set( 'version', IMAGIFY_VERSION );
	}

	// First install (site level).
	if ( ! $site_version ) {
		/**
		 * Triggered on Imagify first install (site level).
		 *
		 * @since 1.0
		 */
		do_action( 'imagify_first_install' );
	}
	// Already installed but got updated (site level).
	elseif ( IMAGIFY_VERSION !== $site_version ) {
		/**
		 * Triggered on Imagify upgrade (site level).
		 *
		 * @since 1.0
		 * @since 1.7 $network_version replaces the "new version" (which can easily be grabbed with the constant).
		 *
		 * @param string $network_version Previous version stored on the network.
		 * @param string $site_version    Previous version stored on site level.
		 */
		do_action( 'imagify_upgrade', $network_version, $site_version );
	}

	// If any upgrade has been done, we flush and update version.
	if ( did_action( 'imagify_first_install' ) || did_action( 'imagify_upgrade' ) ) {
		Imagify_Data::get_instance()->set( 'version', IMAGIFY_VERSION );
	}
}

/**
 * Upgrade the upgrader:
 * Imagify 1.7 splits "network version" and "site version". Since the "site version" didn't exist before 1.7, we need to provide a version based on the "network version".
 *
 * @since  1.7
 * @author Grégory Viguier
 */
function imagify_upgrader_upgrade() {
	global $wpdb;

	// Version stored on the network.
	$network_version = Imagify_Options::get_instance()->get( 'version' );

	if ( ! $network_version ) {
		// Really first install.
		return;
	}

	// Version stored at the site level.
	$site_version = Imagify_Data::get_instance()->get( 'version' );

	if ( $site_version ) {
		// This site's upgrader is already upgraded.
		return;
	}

	if ( ! is_multisite() ) {
		// Not a multisite, so both versions must have the same value.
		Imagify_Data::get_instance()->set( 'version', $network_version );
		return;
	}

	$sites = get_site_option( 'imagify_old_version' );

	if ( IMAGIFY_VERSION !== $network_version && ! $sites ) {
		// The network is not up-to-date yet: store the site IDs that must be updated.
		$network_id = function_exists( 'get_current_network_id' ) ? get_current_network_id() : $wpdb->siteid;
		$sites      = $wpdb->get_col( $wpdb->prepare( "SELECT blog_id FROM $wpdb->blogs WHERE site_id = %d AND archived = 0 AND deleted = 0", $network_id ) );
		$sites      = array_map( 'absint', $sites );
		$sites      = array_filter( $sites );

		if ( ! $sites ) {
			// Uh?
			return;
		}

		// We store the old network version and the site Ids: those sites will need to be upgraded from this version.
		$sites['version'] = $network_version;

		add_site_option( 'imagify_old_version', $sites );
	}

	if ( empty( $sites['version'] ) ) {
		// WTF.
		delete_site_option( 'imagify_old_version' );
		return;
	}

	$network_version = $sites['version'];
	unset( $sites['version'] );

	$sites   = array_flip( $sites );
	$site_id = get_current_blog_id();

	if ( ! isset( $sites[ $site_id ] ) ) {
		// This site is already upgraded.
		return;
	}

	unset( $sites[ $site_id ] );

	if ( ! $sites ) {
		// We're done, all the sites have been upgraded.
		delete_site_option( 'imagify_old_version' );
	} else {
		// Some sites still need to be upgraded.
		$sites = array_flip( $sites );
		$sites['version'] = $network_version;
		update_site_option( 'imagify_old_version', $sites );
	}

	Imagify_Data::get_instance()->set( 'version', $network_version );
}

add_action( 'imagify_first_network_install', '_imagify_first_install' );
/**
 * Keeps this function up to date at each version.
 *
 * @since 1.0
 */
function _imagify_first_install() {
	// Set a transient to know when we will have to display a notice to ask the user to rate the plugin.
	set_site_transient( 'imagify_seen_rating_notice', true, DAY_IN_SECONDS * 3 );
}

add_action( 'imagify_upgrade', '_imagify_new_upgrade', 10, 2 );
/**
 * What to do when Imagify is updated, depending on versions.
 *
 * @since 1.0
 * @since 1.7 $network_version replaces the "new version" (which can easily be grabbed with the constant).
 *
 * @param string $network_version Previous version stored on the network.
 * @param string $site_version    Previous version stored on site level.
 */
function _imagify_new_upgrade( $network_version, $site_version ) {
	global $wpdb;

	$options = Imagify_Options::get_instance();

	// 1.2
	if ( version_compare( $site_version, '1.2' ) < 0 ) {
		// Update all already optimized images status from 'error' to 'already_optimized'.
		$query = new WP_Query( array(
			'is_imagify'             => true,
			'post_type'              => 'attachment',
			'post_status'            => imagify_get_post_statuses(),
			'post_mime_type'         => imagify_get_mime_types(),
			'meta_key'               => '_imagify_status',
			'meta_value'             => 'error',
			'posts_per_page'         => -1,
			'update_post_term_cache' => false,
			'no_found_rows'          => true,
			'fields'                 => 'ids',
		) );

		if ( $query->posts ) {
			foreach ( (array) $query->posts as $id ) {
				$attachment_error = get_imagify_attachment( 'wp', $id, 'imagify_upgrade' )->get_optimized_error();

				if ( false !== strpos( $attachment_error, 'This image is already compressed' ) ) {
					update_post_meta( $id, '_imagify_status', 'already_optimized' );
				}
			}
		}

		// Auto-activate the Admin Bar option.
		$options->set( 'admin_bar_menu', 1 );
	}

	// 1.3.2
	if ( version_compare( $site_version, '1.3.2' ) < 0 ) {
		// Update all already optimized images status from 'error' to 'already_optimized'.
		$query = new WP_Query( array(
			'is_imagify'             => true,
			'post_type'              => 'attachment',
			'post_status'            => imagify_get_post_statuses(),
			'post_mime_type'         => imagify_get_mime_types(),
			'meta_query'             => array(
				'relation' => 'AND',
				array(
					'key'     => '_imagify_data',
					'compare' => 'EXISTS',
				),
				array(
					'key'     => '_imagify_optimization_level',
					'compare' => 'NOT EXISTS',
				),
			),
			'posts_per_page'         => -1,
			'update_post_term_cache' => false,
			'no_found_rows'          => true,
			'fields'                 => 'ids',
		) );

		if ( $query->posts ) {
			foreach ( (array) $query->posts as $id ) {
				$attachment_stats = get_imagify_attachment( 'wp', $id, 'imagify_upgrade' )->get_stats_data();

				if ( isset( $attachment_stats['aggressive'] ) ) {
					update_post_meta( $id, '_imagify_optimization_level', (int) $attachment_stats['aggressive'] );
				}
			}
		}
	}

	// 1.4.5
	if ( version_compare( $site_version, '1.4.5' ) < 0 ) {
		// Delete all transients used for async optimization.
		$wpdb->query( $wpdb->prepare( "DELETE from $wpdb->options WHERE option_name LIKE %s", Imagify_DB::esc_like( '_transient_imagify-async-in-progress-' ) . '%' ) );
	}

	// 1.7
	if ( version_compare( $site_version, '1.7' ) < 0 ) {
		// Migrate data.
		Imagify_Cron_Library_Size::get_instance()->do_event();

		if ( ! imagify_is_active_for_network() ) {
			// Make sure the settings are autoloaded.
			$wpdb->query( $wpdb->prepare( "UPDATE {$wpdb->options} SET `autoload` = 'yes' WHERE `autoload` != 'yes' AND option_name = %s", $options->get_option_name() ) );
		}

		// Rename the option that stores the NGG table version. Since the table is also updated in 1.7, let's simply delete the option.
		delete_option( $wpdb->prefix . 'ngg_imagify_data_db_version' );
	}

	// 1.8.1
	if ( version_compare( $site_version, '1.8.1' ) < 0 ) {
		// Custom folders: replace `{{ABSPATH}}/` by `{{ROOT}}/`.
		$filesystem  = imagify_get_filesystem();
		$replacement = '{{ROOT}}/';

		if ( $filesystem->has_wp_its_own_directory() ) {
			$replacement .= str_replace( $filesystem->get_site_root(), '', $filesystem->get_abspath() );
		}

		$replacement = Imagify_DB::esc_like( $replacement );

		$wpdb->query( $wpdb->prepare( "UPDATE {$wpdb->base_prefix}imagify_files SET path = REPLACE( path, '{{ABSPATH}}/', %s ) WHERE path LIKE %s", $replacement, '{{ABSPATH}}/%' ) );
		$wpdb->query( $wpdb->prepare( "UPDATE {$wpdb->base_prefix}imagify_folders SET path = REPLACE( path, '{{ABSPATH}}/', %s ) WHERE path LIKE %s", $replacement, '{{ABSPATH}}/%' ) );
	}
}

add_action( 'upgrader_process_complete', 'imagify_maybe_reset_opcache', 20, 2 );
/**
 * Maybe reset opcache after Imagify update.
 *
 * @since  1.7.1.2
 * @author Grégory Viguier
 *
 * @param object $wp_upgrader Plugin_Upgrader instance.
 * @param array  $hook_extra  {
 *     Array of bulk item update data.
 *
 *     @type string $action  Type of action. Default 'update'.
 *     @type string $type    Type of update process. Accepts 'plugin', 'theme', 'translation', or 'core'.
 *     @type bool   $bulk    Whether the update process is a bulk update. Default true.
 *     @type array  $plugins Array of the basename paths of the plugins' main files.
 * }
 */
function imagify_maybe_reset_opcache( $wp_upgrader, $hook_extra ) {
	static $imagify_path;

	if ( ! isset( $hook_extra['action'], $hook_extra['type'], $hook_extra['plugins'] ) ) {
		return;
	}

	if ( 'update' !== $hook_extra['action'] || 'plugin' !== $hook_extra['type'] || ! is_array( $hook_extra['plugins'] ) ) {
		return;
	}

	$plugins = array_flip( $hook_extra['plugins'] );

	if ( ! isset( $imagify_path ) ) {
		$imagify_path = plugin_basename( IMAGIFY_FILE );
	}

	if ( ! isset( $plugins[ $imagify_path ] ) ) {
		return;
	}

	imagify_reset_opcache();
}

/**
 * Reset PHP opcache.
 *
 * @since  1.8.1
 * @author Grégory Viguier
 */
function imagify_reset_opcache() {
	static $can_reset;

	if ( ! isset( $can_reset ) ) {
		if ( ! function_exists( 'opcache_reset' ) ) {
			$can_reset = false;
			return;
		}

		$restrict_api = ini_get( 'opcache.restrict_api' );

		if ( $restrict_api && strpos( __FILE__, $restrict_api ) !== 0 ) {
			$can_reset = false;
			return;
		}

		$can_reset = true;
	}

	if ( ! $can_reset ) {
		return;
	}

	opcache_reset();
}