<?php

namespace database;

include_once "../../global.inc.php";
include_once PATH_DATABASE . "/SqlManager.php";

/**
 * Description of SpsSqlManager
 * 
 * @author stubbfel
 * @since 20.06.2013
 */
class SpsSqlManager extends SQLManager {

    /**
     * Default-Constructor
     */
    public function __construct() {
        parent::__construct();
    }

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

    private $selectTerm = "SELECT DISTINCT id, parent FROM sps WHERE ";
    private $andTerm = " and ";
    private $aliasTerm = "alias = ";
    private $domainTerm = "did = ";
    private $domainNameTerm = "name = ";
    private $quoteTerm = "\"";
    private $interSectTermStart = "Intersects(";
    private $interSectTermEnd = "),plan)";
    private $polyStartStr = "GeomFromText('Polygon((";
    private $polyEndStr = "))'";

    /**
     * Methods send an query for the sps-service
     * @param array $queryArgs
     * @return array [num][assoc]
     */
    public function sendSpsAliasQuery($queryArgs = array()) {

        if (array_key_exists("alias", $queryArgs)) {
            $alias = $queryArgs["alias"];
        } else {
            return null;
        }

        $domain = null;
        if (array_key_exists("domain", $queryArgs)) {
            $domain = $queryArgs["domain"];
        }

        $query = $this->selectTerm;

        if ($this->validAliasString($alias)) {
            $query .= $this->aliasTerm . $this->quoteTerm . $alias . $this->quoteTerm . $this->addDomainTerm($domain);
        } else {
            return null;
        }
        return $this->query($query);
    }

    public function sendSpsCoordinateQuery($queryArgs = array()) {
        if (array_key_exists("poly", $queryArgs)) {
            $poly = $queryArgs["poly"];
        } else {
            return null;
        }

        $domain = null;
        if (array_key_exists("domain", $queryArgs)) {
            $domain = $queryArgs["domain"];
        }

        if ($this->validPolyString($poly)) {
            $query = $this->selectTerm . $this->interSectTermStart . $poly . $this->interSectTermEnd . $this->addDomainTerm($domain);
        } else {
            return null;
        }
        return $this->query($query);
    }

    private function addDomainTerm($domain) {
        $result = null;
        if ($domain != null && $this->validDomainString($domain)) {
            if ($this->isDid($domain)) {
                $result .= $this->andTerm . $this->domainTerm . $this->quoteTerm . $domain . $this->quoteTerm;
            } else {
                $result .= $this->andTerm . $this->domainNameTerm . $this->quoteTerm . $domain . $this->quoteTerm;
            }
        }
        return $result;
    }

    private function validAliasString($alias) {
        if ($this->validString($alias) && ctype_alnum($alias)) {
            return TRUE;
        }
        return FALSE;
    }

    private function validDomainString($domain) {
        if ($this->validString($domain) && ctype_alnum($domain)) {
            return TRUE;
        }
        return FALSE;
    }

    private function validPolyString($poly) {
        if ($this->validString($poly) && $this->startsWith($poly, $this->polyStartStr) && $this->endsWith($poly, $this->polyEndStr)) {
            return TRUE;
        }
        return FALSE;
    }

    private function isDid($string) {
        return ctype_digit($string);
    }

}
?>