<?php

namespace api;

include_once "../../global.inc.php";
include_once PATH_DATABASE . "/SpsSqlManager.php";
require_once PATH_API . "/Api.php";

/**
 * This class provides some spezial SpsAPI methods
 * @author stubbfel
 * @since 20.06.2013
 */
class SpsApi extends Api {

    /**
     * Default-Constructor
     */
    public function __construct() {
        $this->sqlManager = new \database\SpsSqlManager();
        parent::__construct();
    }

    /**
     * Default-DeConstructor
     */
    public function __destruct() {
        parent::__destruct();
    }

    /**
     * Method start a sps-query(alias)
     * @param array $queryArgs
     * @return array[num] [assoc]
     */
    public function sendSpsAliasQuery($queryArgs = array()) {

        return $this->sqlManager->sendSpsAliasQuery($queryArgs);
    }

    private $range = 1;

    public function sendSpsCoordinateQuery($queryArgs = array()) {
        if (!array_key_exists("longitude", $queryArgs) || !array_key_exists("latitude", $queryArgs)) {
            return null;
        }
        $latitude = $queryArgs["latitude"];
        $longitude = $queryArgs["longitude"];

        if (!$this->validLatitude($latitude) || !$this->validLongitude($longitude)) {
            return null;
        }

        $queryArgs["poly"] = $this->createPolygon($latitude, $longitude, $this->range);
        return $this->sqlManager->sendSpsCoordinateQuery($queryArgs);
    }

    private function validLongitude($string) {

        return ctype_digit(str_replace(".", "", $string));
    }

    private function validLatitude($string) {
        return ctype_digit(str_replace(".", "", $string));
    }

    private function createPolygon($latitude, $longitude, $range) {
        $minLat = $latitude - $range;
        $minLong = $longitude - $range;
        $maxLat = $latitude + $range;
        $maxLong = $longitude + $range;
        return "GeomFromText('Polygon(($minLat $minLong,$minLat $maxLong,$maxLat $maxLong,$maxLat $minLong,$minLat $minLong))'";
    }

}

?>