<?php

require_once 'participoLib/participo.php';

/** Frame for a variable synced with a db*/
class PdoCellValue{
    public function __construct(string $name, $value, $type){
        $this->name = $name;
        $this->value = $value;
        $this->type = $type;
    }
    static public function collect(array $row){
        $names = [];
        foreach($row as $entry){
            if(isset($entry->name)){
                $names[] = $entry->name;
            }
        }
        return $names;
    } 
    public function value(){return $this->value;}
    public function setValue($value){$this->value = $value;}
    private string $name = null;
    private $value = null;
    private int $data_type = null;
}

class Ride{
    /** Constructor
     * 
     * - filters/sanitizes all inputs
     * - sets all members
     *
     * @param mixed $id setValue for the id
     * @param mixed $eventId setValue for the eventId
     * @param mixed $driverId setValue for the driverId
     * @param mixed $seats setValue for the seats
     * @param string $passengerIds string of comma separated values
     */
    public function __construct($id, $eventId, $driverId, $seats, string $passengerIds){
        $this->id =           new PdoCellValue('id',        filterId($id),                      PDO::PARAM_INT);
        $this->eventId =      new PdoCellValue('eventId',   filterId($eventId),                 PDO::PARAM_INT);
        $this->driverId =     new PdoCellValue('fahrerId',  filterId($driverId),                PDO::PARAM_INT);
        $this->seats=         new PdoCellValue('plaetze',   filterCount($seats),                PDO::PARAM_INT);
        $this->passengerIds = new PdoCellValue('mitfahrer', filterCsv($passengerIds, filterId), PDO::PARAM_STRING);
    }

    /** parse and sanitize a csvFormatted string */
    function filterCsv(string $list, $callback, string $separator=',', bool $dontTrim = false){
        $list = explode($separator, $list);
        foreach($list as &$element){
            $element = $callback($element);
            if(!$dontTrim){
                $element = trim($element);
            }
        }
        return $list;
    }

////
// private functions
////

// DbInterface
    private static $dbName = 'cwsvjudo';
    private static $dbTableName = 'wkParticipo_Fahrten';
    private static $dbFullTableNameString = '`'.$dbName.'`.`'.$dbTableName.'`';

    /** Slice a list of arrays 'horizontal' through a specific key 
     *
     * - iterate through a list of arrays and collect the values under a specific key
     * - if the key doesn't exist nothing (not even null) will be collected
     * 
     * @param array $array source array
     * @param mixed $key key to collect
     * @return array list of array entries
     */
    function sliceArrayByKey(array $array, $key){
        $sliced = [];
        foreach($array as $entry){
            if(isset($entry[$key])){
                $sliced[] = $entry[$key];
            }
        }
        return $sliced;
    }

    private static function dbSelect(){}
    private static function dbInsert(array $values){
        $names = [];
        $binds = [];
        $params = [];
        foreach($values as $value){
            $names[] = $value->name;
            $binds[] = ':'.$value->name;
            $params[':'.$value->name] = [
                'value' => $value->name
                , 'data_type' => $value->type
            ];
        }

        $query = 'INSERT INTO '.$dbFullTableNameString.' ('.implode(',', $names).') values ('.implode(',', $binds).');';

        // @todo remove ignoreErrors again
		// @todo Inserting-Starter-Statement returns false on execution: Why? It seems to succeed! 
		$response = dbConnector::query($query, $params, ['ignoreErrors'=>true]);
		return dbConnector::getLastInsertId();
    }
    private static function dbDelete(){}
    private static function dbUpdate(){}

    private 

////
// private variables
////

    /** Unique Identifier for the Ride
     *
     * @var int > 0
     */
    private $id=null;
    /** Id of the event for the ride
     *
     * @var int > 0
     */
    private $eventId = null;
    /** Id of the user who offered the drive
     *
     * @var int > 0
     */
    private $driverId = null;
    /** number of seats the drive offers
     *
     * @var int > 0
     */
    private $seats = null;
    /** List of Ids of the users this ride chauffeurs
     *
     * @var array(int > 0)
     */
    private $passengerIds = null;

    private $event = null;
    private $driver = null;
    private $passengers = null;
}