<?php

/**

 * WP_Importer base class

 */

class WP_Importer {

	/**

	 * Class Constructor

	 *

	 * @return void

	 */

	function __construct() {}

	/**

	 * Returns array with imported permalinks from WordPress database

	 *

	 * @param string $bid

	 * @return array

	 */

	function get_imported_posts( $importer_name, $bid ) {

		global $wpdb;

		$hashtable = array();

		$limit = 100;

		$offset = 0;

		// Grab all posts in chunks

		do {

			$meta_key = $importer_name . '_' . $bid . '_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] = intval( $r->post_id );

				}

			}

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

		// unset to save memory

		unset( $results, $r );

		return $hashtable;

	}

	/**

	 * Return count of imported permalinks from WordPress database

	 *

	 * @param string $bid

	 * @return int

	 */

	function count_imported_posts( $importer_name, $bid ) {

		global $wpdb;

		$count = 0;

		// Get count of permalinks

		$meta_key = $importer_name . '_' . $bid . '_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 = intval( $result[0]->cnt );

		// unset to save memory

		unset( $results );

		return $count;

	}

	/**

	 * Set array with imported comments from WordPress database

	 *

	 * @param string $bid

	 * @return array

	 */

	function get_imported_comments( $bid ) {

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

					$source_comment_id = intval( $source_comment_id );

					// Check if this comment came from this blog

					if ( $bid == $ca_bid ) {

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

					}

				}

			}

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

		// unset to save memory

		unset( $results, $r );

		return $hashtable;

	}

	function set_blog( $blog_id ) {

		if ( is_numeric( $blog_id ) ) {

			$blog_id = (int) $blog_id;

		} else {

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

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

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

				exit();

			}

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

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

			$blog = get_blog_details( array( 'domain' => $parsed['host'], 'path' => $parsed['path'] ) );

			if ( !$blog ) {

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

				exit();

			}

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

			// Restore global $current_blog

			global $current_blog;

			$current_blog = $blog;

		}

		if ( function_exists( 'is_multisite' ) ) {

			if ( is_multisite() )

				switch_to_blog( $blog_id );

		}

		return $blog_id;

	}

	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

	 */

	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

	 */

	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_remote_request( $url, $args );

	}

	/**

	 * Bump up the request timeout for http requests

	 *

	 * @param int $val

	 * @return int

	 */

	function bump_request_timeout( $val ) {

		return 60;

	}

	/**

	 * Check if user has exceeded disk quota

	 *

	 * @return bool

	 */

	function is_user_over_quota() {

		global $current_blog;

		if ( function_exists( 'upload_is_user_over_quota' ) ) {

			if ( upload_is_user_over_quota( 1 ) ) {

				echo "Sorry, you have used your upload quota.\n";

				return true;

			}

		}

		return false;

	}

	/**

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

	 *

	 * @param string $string

	 * @return string

	 */

	function min_whitespace( $string ) {

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

	}

	/**

	 * Reset global variables that grow out of control during imports

	 *

	 * @return void

	 */

	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'];

	$out = array();

	$last_arg = null;

	$return = null;

	$il = sizeof( $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;

		} else if ( (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;

		} else if ( $last_arg !== null ) {

			$out[$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;

}