<?php

/**

 * WordPress Administration Importer API.

 *

 * @package WordPress

 * @subpackage Administration

 */

/**

 * Retrieves the list of importers.

 *

 * @since 2.0.0

 *

 * @global array $wp_importers

 * @return array

 */

function get_importers() {

	global $wp_importers;

	if ( is_array( $wp_importers ) ) {

		uasort( $wp_importers, '_usort_by_first_member' );

	}

	return $wp_importers;

}

/**

 * Sorts a multidimensional array by first member of each top level member.

 *

 * Used by uasort() as a callback, should not be used directly.

 *

 * @since 2.9.0

 * @access private

 *

 * @param array $a

 * @param array $b

 * @return int

 */

function _usort_by_first_member( $a, $b ) {

	return strnatcasecmp( $a[0], $b[0] );

}

/**

 * Registers importer for WordPress.

 *

 * @since 2.0.0

 *

 * @global array $wp_importers

 *

 * @param string   $id          Importer tag. Used to uniquely identify importer.

 * @param string   $name        Importer name and title.

 * @param string   $description Importer description.

 * @param callable $callback    Callback to run.

 * @return void|WP_Error Void on success. WP_Error when $callback is WP_Error.

 */

function register_importer( $id, $name, $description, $callback ) {

	global $wp_importers;

	if ( is_wp_error( $callback ) ) {

		return $callback;

	}

	$wp_importers[ $id ] = array( $name, $description, $callback );

}

/**

 * Cleanup importer.

 *

 * Removes attachment based on ID.

 *

 * @since 2.0.0

 *

 * @param string $id Importer ID.

 */

function wp_import_cleanup( $id ) {

	wp_delete_attachment( $id );

}

/**

 * Handles importer uploading and adds attachment.

 *

 * @since 2.0.0

 *

 * @return array Uploaded file's details on success, error message on failure.

 */

function wp_import_handle_upload() {

	if ( ! isset( $_FILES['import'] ) ) {

		return array(

			'error' => sprintf(

				/* translators: 1: php.ini, 2: post_max_size, 3: upload_max_filesize */

				__( 'File is empty. Please upload something more substantial. This error could also be caused by uploads being disabled in your %1$s file or by %2$s being defined as smaller than %3$s in %1$s.' ),

				'php.ini',

				'post_max_size',

				'upload_max_filesize'

			),

		);

	}

	$overrides                 = array(

		'test_form' => false,

		'test_type' => false,

	);

	$_FILES['import']['name'] .= '.txt';

	$upload                    = wp_handle_upload( $_FILES['import'], $overrides );

	if ( isset( $upload['error'] ) ) {

		return $upload;

	}

	// Construct the attachment array.

	$attachment = array(

		'post_title'     => wp_basename( $upload['file'] ),

		'post_content'   => $upload['url'],

		'post_mime_type' => $upload['type'],

		'guid'           => $upload['url'],

		'context'        => 'import',

		'post_status'    => 'private',

	);

	// Save the data.

	$id = wp_insert_attachment( $attachment, $upload['file'] );

	/*

	 * Schedule a cleanup for one day from now in case of failed

	 * import or missing wp_import_cleanup() call.

	 */

	wp_schedule_single_event( time() + DAY_IN_SECONDS, 'importer_scheduled_cleanup', array( $id ) );

	return array(

		'file' => $upload['file'],

		'id'   => $id,

	);

}

/**

 * Returns a list from WordPress.org of popular importer plugins.

 *

 * @since 3.5.0

 *

 * @return array Importers with metadata for each.

 */

function wp_get_popular_importers() {

	$locale            = get_user_locale();

	$popular_importers = get_site_transient( $cache_key );

	if ( ! $popular_importers ) {

		$url     = add_query_arg(

			array(

				'locale'  => $locale,

			),

			'http://api.wordpress.org/core/importers/1.1/'

		);

		if ( wp_http_supports( array( 'ssl' ) ) ) {

			$url = set_url_scheme( $url, 'https' );

		}

		$response          = wp_remote_get( $url, $options );

		$popular_importers = json_decode( wp_remote_retrieve_body( $response ), true );

		if ( is_array( $popular_importers ) ) {

			set_site_transient( $cache_key, $popular_importers, 2 * DAY_IN_SECONDS );

		} else {

			$popular_importers = false;

		}

	}

	if ( is_array( $popular_importers ) ) {

		// If the data was received as translated, return it as-is.

		if ( $popular_importers['translated'] ) {

			return $popular_importers['importers'];

		}

		foreach ( $popular_importers['importers'] as &$importer ) {

			// phpcs:ignore WordPress.WP.I18n.LowLevelTranslationFunction,WordPress.WP.I18n.NonSingularStringLiteralText

			$importer['description'] = translate( $importer['description'] );

			if ( 'WordPress' !== $importer['name'] ) {

				// phpcs:ignore WordPress.WP.I18n.LowLevelTranslationFunction,WordPress.WP.I18n.NonSingularStringLiteralText

				$importer['name'] = translate( $importer['name'] );

			}

		}

		return $popular_importers['importers'];

	}

	return array(

		// slug => name, description, plugin slug, and register_importer() slug.

		'blogger'     => array(

			'name'        => __( 'Blogger' ),

			'description' => __( 'Import posts, comments, and users from a Blogger blog.' ),

			'plugin-slug' => 'blogger-importer',

			'importer-id' => 'blogger',

		),

		'wpcat2tag'   => array(

			'name'        => __( 'Categories and Tags Converter' ),

			'description' => __( 'Convert existing categories to tags or tags to categories, selectively.' ),

			'plugin-slug' => 'wpcat2tag-importer',

			'importer-id' => 'wp-cat2tag',

		),

		'livejournal' => array(

			'name'        => __( 'LiveJournal' ),

			'description' => __( 'Import posts from LiveJournal using their API.' ),

			'plugin-slug' => 'livejournal-importer',

			'importer-id' => 'livejournal',

		),

		'movabletype' => array(

			'name'        => __( 'Movable Type and TypePad' ),

			'description' => __( 'Import posts and comments from a Movable Type or TypePad blog.' ),

			'plugin-slug' => 'movabletype-importer',

			'importer-id' => 'mt',

		),

		'rss'         => array(

			'name'        => __( 'RSS' ),

			'description' => __( 'Import posts from an RSS feed.' ),

			'plugin-slug' => 'rss-importer',

			'importer-id' => 'rss',

		),

		'tumblr'      => array(

			'name'        => __( 'Tumblr' ),

			'description' => __( 'Import posts & media from Tumblr using their API.' ),

			'plugin-slug' => 'tumblr-importer',

			'importer-id' => 'tumblr',

		),

		'wordpress'   => array(

			'name'        => 'WordPress',

			'description' => __( 'Import posts, pages, comments, custom fields, categories, and tags from a WordPress export file.' ),

			'plugin-slug' => 'wordpress-importer',

			'importer-id' => 'wordpress',

		),

	);

}