<?php

/**
 * Fired when the plugin is uninstalled.
 *
 * When populating this file, consider the following flow
 * of control:
 *
 * - This method should be static
 * - Check if the $_REQUEST content actually is the plugin name
 * - Run an admin referrer check to make sure it goes through authentication
 * - Verify the output of $_GET makes sense
 * - Repeat with other user roles. Best directly by using the links/query string parameters.
 * - Repeat things for multisite. Once for a single site in the network, once sitewide.
 *
 * This file may be updated more in future version of the Boilerplate; however, this is the
 * general skeleton and outline for how the file should work.
 *
 * For more information, see the following discussion:
 * https://github.com/tommcfarlin/WordPress-Plugin-Boilerplate/pull/123#issuecomment-28541913
 *
 * @link       www.faboba.com
 * @since      1.0.0
 *
 * @package    Falang
 */

// If uninstall not called from WordPress, then exit.
if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
	exit;
}

/**
 * Manages Falang uninstallation
 * The goal is to remove ALL Falang related data in db if set to true
 *
 * @since 1.0
 */
class Falang_Uninstall {

	/**
	 * Constructor: manages uninstall for multisite
	 *
	 * @since 0.5
	 */
	public function __construct() {
		$this->uninstall();
	}

	/**
	 * Removes ALL plugin data
	 * only when the relevant option is active
	 *
	 * @since 0.5
	 */
	public function uninstall() {
		global $wpdb;

		$delete_trans = $this->get_option('delete_trans_on_uninstall',false);

		if (!$delete_trans) {
			return;
		}

		// Need to register the taxonomies
		$falang_taxonomies = array( 'language', 'term_language' );
		foreach ( $falang_taxonomies as $taxonomy ) {
			register_taxonomy( $taxonomy, null, array( 'label'     => false,
			                                           'public'    => false,
			                                           'query_var' => false,
			                                           'rewrite'   => false
			) );
		}

		$languages = get_terms( 'language', array( 'hide_empty' => false ) );

		// Delete the strings translations 1.2+
		register_post_type( 'falang_mo', array( 'rewrite' => false, 'query_var' => false ) );
		$ids = get_posts(
			array(
				'post_type'   => 'falang_mo',
				'post_status' => 'any',
				'numberposts' => - 1,
				'nopaging'    => true,
				'fields'      => 'ids',
			)
		);
		foreach ( $ids as $id ) {
			wp_delete_post( $id, true );
		}

		foreach ( $languages as $language ) {
			$prefix = $this->get_prefix( $language->locale );
			//delete post meta
			$wpdb->query( "DELETE FROM {$wpdb->postmeta} WHERE meta_key like ( '" . $prefix . "%')" ); // PHPCS:ignore WordPress.DB.PreparedSQL.NotPrepared

			//delete post locale
			$wpdb->query( "DELETE FROM {$wpdb->postmeta} WHERE meta_key = '_locale' AND meta_value = '" . $prefix . "%'" ); // PHPCS:ignore WordPress.DB.PreparedSQL.NotPrepared

			//delete termmeta
			// Do nothing if the termmeta table does not exists
			if ( count( $wpdb->get_results( "SHOW TABLES LIKE '$wpdb->termmeta'" ) ) ) {
				$wpdb->query( "DELETE FROM {$wpdb->termmeta} WHERE meta_key like ( '" . $prefix . "%')" ); // PHPCS:ignore WordPress.DB.PreparedSQL.NotPrepared

			}
		}

		// Delete all what is related to languages and translations
		foreach ( get_terms( $falang_taxonomies, array( 'hide_empty' => false ) ) as $term ) {
			$term_ids[] = (int) $term->term_id;
			$tt_ids[] = (int) $term->term_taxonomy_id;
		}

		if ( ! empty( $term_ids ) ) {
			$term_ids = array_unique( $term_ids );
			$wpdb->query( "DELETE FROM {$wpdb->terms} WHERE term_id IN ( " . implode( ',', $term_ids ) . ' )' ); // PHPCS:ignore WordPress.DB.PreparedSQL.NotPrepared
			$wpdb->query( "DELETE FROM {$wpdb->term_taxonomy} WHERE term_id IN ( " . implode( ',', $term_ids ) . ' )' ); // PHPCS:ignore WordPress.DB.PreparedSQL.NotPrepared
		}

		if ( ! empty( $tt_ids ) ) {
			$tt_ids = array_unique( $tt_ids );
			$wpdb->query( "DELETE FROM {$wpdb->term_relationships} WHERE term_taxonomy_id IN ( " . implode( ',', $tt_ids ) . ' )' ); // PHPCS:ignore WordPress.DB.PreparedSQL.NotPrepared
		}

		// Delete options
		delete_option( 'falang' );
		delete_option( 'widget_falang' ); // Automatically created by WP
        delete_option( 'falang_wpml_strings' ); // Strings registered with icl_register_string
        delete_option( 'falang_dismissed_notices' );


    }

	/**
	 * Get option
	 *
	 * @param string $option_name. Option name
	 * @param mixed $default. Default value if option does not exist
	 * @return mixed
	 *
	 * @from 1.4.7
	 */
	public function get_option($option_name, $default = false) {
		$options = get_option('falang');
		if (isset($options[$option_name])) {

			return $options[$option_name];

		}

		return $default;
	}

	/**
	 * Get prefix for translation meta keys
	 *
	 * @from 1.0
	 *
	 * @param string $language_locale
	 * @return string
	 */
	public function get_prefix($locale) {

		return '_' . $locale . '_';

	}
}
new Falang_Uninstall();