<?php

/**

 * WP_Importer base class

 */

class WP_Importer {

	/**

	 * Class Constructor

	 */

	public function __construct() {}

	/**

	 * Returns array with imported permalinks from WordPress database

	 *

	 * @global wpdb $wpdb WordPress database abstraction object.

	 *

	 * @param string $importer_name

	 * @param string $blog_id

	 * @return array

	 */

	public function get_imported_posts( $importer_name, $blog_id ) {

		global $wpdb;

		$hashtable = array();

		$limit  = 100;

		$offset = 0;

		// Grab all posts in chunks.

		do {

			$meta_key = $importer_name . '_' . $blog_id . '_permalink';

			$sql      = $wpdb->prepare( "SELECT post_id, meta_value FROM $wpdb->postmeta WHERE meta_key = %s LIMIT %d,%d", $meta_key, $offset, $limit );

			$results  = $wpdb->get_results( $sql );

			// Increment offset.

			$offset = ( $limit + $offset );

			if ( ! empty( $results ) ) {

				foreach ( $results as $r ) {

					// Set permalinks into array.

					$hashtable[ $r->meta_value ] = (int) $r->post_id;

				}

			}

		} while ( count( $results ) == $limit );

		return $hashtable;

	}

	/**

	 * Return count of imported permalinks from WordPress database

	 *

	 * @global wpdb $wpdb WordPress database abstraction object.

	 *

	 * @param string $importer_name

	 * @param string $blog_id

	 * @return int

	 */

	public function count_imported_posts( $importer_name, $blog_id ) {

		global $wpdb;

		$count = 0;

		// Get count of permalinks.

		$meta_key = $importer_name . '_' . $blog_id . '_permalink';

		$sql      = $wpdb->prepare( "SELECT COUNT( post_id ) AS cnt FROM $wpdb->postmeta WHERE meta_key = %s", $meta_key );

		$result = $wpdb->get_results( $sql );

		if ( ! empty( $result ) ) {

			$count = (int) $result[0]->cnt;

		}

		return $count;

	}

	/**

	 * Set array with imported comments from WordPress database

	 *

	 * @global wpdb $wpdb WordPress database abstraction object.

	 *

	 * @param string $blog_id

	 * @return array

	 */

	public function get_imported_comments( $blog_id ) {

		global $wpdb;

		$hashtable = array();

		$limit  = 100;

		$offset = 0;

		// Grab all comments in chunks.

		do {

			$sql     = $wpdb->prepare( "SELECT comment_ID, comment_agent FROM $wpdb->comments LIMIT %d,%d", $offset, $limit );

			$results = $wpdb->get_results( $sql );

			// Increment offset.

			$offset = ( $limit + $offset );

			if ( ! empty( $results ) ) {

				foreach ( $results as $r ) {

					// Explode comment_agent key.

					list ( $comment_agent_blog_id, $source_comment_id ) = explode( '-', $r->comment_agent );

					$source_comment_id = (int) $source_comment_id;

					// Check if this comment came from this blog.

					if ( $blog_id == $comment_agent_blog_id ) {

						$hashtable[ $source_comment_id ] = (int) $r->comment_ID;

					}

				}

			}

		} while ( count( $results ) == $limit );

		return $hashtable;

	}

	/**

	 * @param int $blog_id

	 * @return int|void

	 */

	public function set_blog( $blog_id ) {

		if ( is_numeric( $blog_id ) ) {

			$blog_id = (int) $blog_id;

		} else {

			$blog   = 'http://' . preg_replace( '#^https?://#', '', $blog_id );

			$parsed = parse_url( $blog );

			if ( ! $parsed || empty( $parsed['host'] ) ) {

				fwrite( STDERR, "Error: can not determine blog_id from $blog_id\n" );

				exit;

			}

			if ( empty( $parsed['path'] ) ) {

				$parsed['path'] = '/';

			}

			$blogs = get_sites(

				array(

					'domain' => $parsed['host'],

					'number' => 1,

					'path'   => $parsed['path'],

				)

			);

			if ( ! $blogs ) {

				fwrite( STDERR, "Error: Could not find blog\n" );

				exit;

			}

			$blog    = array_shift( $blogs );

			$blog_id = (int) $blog->blog_id;

		}

		if ( function_exists( 'is_multisite' ) ) {

			if ( is_multisite() ) {

				switch_to_blog( $blog_id );

			}

		}

		return $blog_id;

	}

	/**

	 * @param int $user_id

	 * @return int|void

	 */

	public function set_user( $user_id ) {

		if ( is_numeric( $user_id ) ) {

			$user_id = (int) $user_id;

		} else {

			$user_id = (int) username_exists( $user_id );

		}

		if ( ! $user_id || ! wp_set_current_user( $user_id ) ) {

			fwrite( STDERR, "Error: can not find user\n" );

			exit;

		}

		return $user_id;

	}

	/**

	 * Sort by strlen, longest string first

	 *

	 * @param string $a

	 * @param string $b

	 * @return int

	 */

	public function cmpr_strlen( $a, $b ) {

		return strlen( $b ) - strlen( $a );

	}

	/**

	 * GET URL

	 *

	 * @param string $url

	 * @param string $username

	 * @param string $password

	 * @param bool   $head

	 * @return array

	 */

	public function get_page( $url, $username = '', $password = '', $head = false ) {

		// Increase the timeout.

		add_filter( 'http_request_timeout', array( $this, 'bump_request_timeout' ) );

		$headers = array();

		$args    = array();

		if ( true === $head ) {

			$args['method'] = 'HEAD';

		}

		if ( ! empty( $username ) && ! empty( $password ) ) {

			$headers['Authorization'] = 'Basic ' . base64_encode( "$username:$password" );

		}

		$args['headers'] = $headers;

		return wp_safe_remote_request( $url, $args );

	}

	/**

	 * Bump up the request timeout for http requests

	 *

	 * @param int $val

	 * @return int

	 */

	public function bump_request_timeout( $val ) {

		return 60;

	}

	/**

	 * Check if user has exceeded disk quota

	 *

	 * @return bool

	 */

	public function is_user_over_quota() {

		if ( function_exists( 'upload_is_user_over_quota' ) ) {

			if ( upload_is_user_over_quota() ) {

				return true;

			}

		}

		return false;

	}

	/**

	 * Replace newlines, tabs, and multiple spaces with a single space.

	 *

	 * @param string $text

	 * @return string

	 */

	public function min_whitespace( $text ) {

		return preg_replace( '|[\r\n\t ]+|', ' ', $text );

	}

	/**

	 * Resets global variables that grow out of control during imports.

	 *

	 * @since 3.0.0

	 *

	 * @global wpdb  $wpdb       WordPress database abstraction object.

	 * @global int[] $wp_actions

	 */

	public function stop_the_insanity() {

		global $wpdb, $wp_actions;

		// Or define( 'WP_IMPORTING', true );

		$wpdb->queries = array();

		// Reset $wp_actions to keep it from growing out of control.

		$wp_actions = array();

	}

}

/**

 * Returns value of command line params.

 * Exits when a required param is not set.

 *

 * @param string $param

 * @param bool   $required

 * @return mixed

 */

function get_cli_args( $param, $required = false ) {

	$args = $_SERVER['argv'];

	if ( ! is_array( $args ) ) {

		$args = array();

	}

	$out = array();

	$last_arg = null;

	$return   = null;

	$il = count( $args );

	for ( $i = 1, $il; $i < $il; $i++ ) {

		if ( (bool) preg_match( '/^--(.+)/', $args[ $i ], $match ) ) {

			$parts = explode( '=', $match[1] );

			$key   = preg_replace( '/[^a-z0-9]+/', '', $parts[0] );

			if ( isset( $parts[1] ) ) {

				$out[ $key ] = $parts[1];

			} else {

				$out[ $key ] = true;

			}

			$last_arg = $key;

		} elseif ( (bool) preg_match( '/^-([a-zA-Z0-9]+)/', $args[ $i ], $match ) ) {

			for ( $j = 0, $jl = strlen( $match[1] ); $j < $jl; $j++ ) {

				$key         = $match[1][ $j ];

				$out[ $key ] = true;

			}

			$last_arg = $key;

		} elseif ( null !== $last_arg ) {

			$out[ $last_arg ] = $args[ $i ];

		}

	}

	// Check array for specified param.

	if ( isset( $out[ $param ] ) ) {

		// Set return value.

		$return = $out[ $param ];

	}

	// Check for missing required param.

	if ( ! isset( $out[ $param ] ) && $required ) {

		// Display message and exit.

		echo "\"$param\" parameter is required but was not specified\n";

		exit;

	}

	return $return;

}