2meet-data-optimizer/uninstall.php

<?php
/**
 * WP Data Optimizer — Uninstall script.
 *
 * Runs only when the plugin is deleted via the WordPress admin.
 * Removes all WPDO tables and options. Does NOT remove HPCT tables.
 *
 * Refuses (wp_die, before any snapshot or DROP) while any site still holds data
 * that exists only in wpdo_* tables — see TMDO_Installer::uninstall_blockers().
 * wp_die() also stops WordPress from deleting the plugin files.
 *
 * v2.2.0 hardening: take a `pre_uninstall` snapshot BEFORE dropping tables.
 * The snapshot file under wp-content/uploads/wpdo-backups/ survives plugin
 * deletion (uploads dir is never auto-purged), so the user can re-install +
 * `wp wpdo snapshot restore <id> --apply` to recover.
 *
 * Multisite: every site is checked and cleaned. The plugin may have been active
 * per site, and it is always inactive by the time it can be deleted, so network
 * activation cannot tell which sites hold wpdo_* tables.
 *
 * @package WP_Data_Optimizer
 */

declare(strict_types=1);

if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
	exit;
}

global $wpdb;

// ── Load shared cleanup logic + snapshot classes ─────────────────────────
$bootstrap_files = array(
	__DIR__ . '/includes/class-tmdo-logger.php',
	__DIR__ . '/includes/class-tmdo-feature-flags.php',
	__DIR__ . '/includes/class-tmdo-installer.php',
	__DIR__ . '/includes/snapshots/class-tmdo-snapshot-manager.php',
	__DIR__ . '/includes/snapshots/class-tmdo-snapshot-writer.php',
	__DIR__ . '/includes/snapshots/class-tmdo-snapshot-reader.php',
	__DIR__ . '/includes/snapshots/class-tmdo-snapshot-pruner.php',
);
$bootstrap_ok    = true;
foreach ( $bootstrap_files as $f ) {
	if ( ! is_file( $f ) ) {
		$bootstrap_ok = false;
		continue;
	}
	require_once $f;
}

// ── Sites to check and clean (0 = single site, no blog switching) ────────
$wpdo_site_ids = is_multisite()
	? array_map(
		'intval',
		get_sites(
			array(
				'fields' => 'ids',
				'number' => 0,
			)
		)
	)
	: array( 0 );

$wpdo_for_each_site = static function ( callable $callback ) use ( $wpdo_site_ids ): void {
	foreach ( $wpdo_site_ids as $wpdo_blog_id ) {
		if ( $wpdo_blog_id ) {
			switch_to_blog( $wpdo_blog_id );
		}
		try {
			$callback( $wpdo_blog_id );
		} finally {
			if ( $wpdo_blog_id ) {
				restore_current_blog();
			}
		}
	}
};

// ── Refuse while any site holds data that exists only in wpdo_* tables ───
if ( ! $bootstrap_ok ) {
	wp_die( esc_html( '2meet Data Optimizer：無法載入資料安全檢查，為避免資料遺失，已停止解除安裝。' ) );
}

$wpdo_blocked = array();
$wpdo_for_each_site(
	static function ( int $blog_id ) use ( &$wpdo_blocked ): void {
		foreach ( TMDO_Installer::uninstall_blockers() as $reason ) {
			$wpdo_blocked[] = ( $blog_id ? "站台 #{$blog_id}：" : '' ) . $reason;
		}
	}
);

if ( $wpdo_blocked ) {
	wp_die(
		'<p>' . esc_html( '2meet Data Optimizer 已停止解除安裝：以下資料只存在 wpdo_* 表，刪除外掛會一併刪除這些表。' ) . '</p>'
		. '<ul><li>' . implode( '</li><li>', array_map( 'esc_html', $wpdo_blocked ) ) . '</li></ul>'
		. '<p>' . esc_html( '目前沒有把這些資料寫回 WordPress 原生表的自動工具。若只想移除外掛程式，可手動刪除外掛目錄，資料表會保留。' ) . '</p>'
	);
}

// ── v2.2.0 M1.5: pre-uninstall snapshot (main-site context only) ─────────
// Snapshot is taken once on the main site — it captures the catalog of all
// wpdo_snapshots rows (which is per-site so per-site snapshots survive the
// site-level table DROP that happens later). Best-effort.
if ( class_exists( 'TMDO_Snapshot_Manager' ) ) {
	$result = TMDO_Snapshot_Manager::create(
		'pre_uninstall',
		array(),
		array(
			'notes'                  => 'Auto-snapshot taken at plugin uninstall time',
			'retention_days'         => 365,
			'inline_threshold_bytes' => 0,
		)
	);
	if ( ! empty( $result['ok'] ) ) {
		$snapshot_id = $result['snapshot_id'];
		$dir         = TMDO_Snapshot_Manager::backup_dir();
		if ( is_dir( $dir ) ) {
			file_put_contents(
				trailingslashit( $dir ) . 'README-pre-uninstall.txt',
				"WPDO pre-uninstall snapshot: {$snapshot_id}\n"
				. 'Created: ' . gmdate( 'Y-m-d H:i:s' ) . " UTC\n\n"
				. "To restore after re-installing wp-data-optimizer:\n"
				. "  1. Re-install the plugin (it will re-create wp_wpdo_snapshots).\n"
				. "  2. Manually re-insert this snapshot's catalog row, or use wp wpdo snapshot list to confirm.\n"
				. "  3. Run: wp wpdo snapshot restore {$snapshot_id} --apply\n"
			);
		}
	}
}

// ── Drop wpdo_* tables and options on every site ─────────────────────────
$wpdo_for_each_site(
	static function (): void {
		TMDO_Installer::drop_all_tables_for_current_blog();
	}
);