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<?php

/**
 * This file is part of the Lean Mapper library (http://www.leanmapper.com)
 *
 * Copyright (c) 2013 Vojtěch Kohout (aka Tharos)
 *
 * For the full copyright and license information, please view the file
 * license-mit.txt that was distributed with this source code.
 */

namespace LeanMapper;

use Closure;
use DibiConnection;

/**
 * Pointer to specific position inside LeanMapper\Result instance
 *
 * @author Vojtěch Kohout
 */
class Row
{

    /** @var Result */
    private $result;

    /** @var int */
    private $id;


    /**
     * @param Result $result
     * @param int $id
     */
    public function __construct(Result $result, $id)
    {
        $this->result = $result;
        $this->id = $id;
    }

    /**
     * Returns value of given field
     *
     * @param string $name
     * @return mixed
     */
    public function __get($name)
    {
        return $this->result->getDataEntry($this->id, $name);
    }

    /**
     * Sets value of given field
     *
     * @param string $name
     * @param mixed $value
     */
    public function __set($name, $value)
    {
        $this->result->setDataEntry($this->id, $name, $value);
    }

    /**
     * Tells whether row is in modified state
     *
     * @return bool
     */
    public function isModified()
    {
        return $this->result->isModified($this->id);
    }

    /**
     * Tells whether row is in modified state
     *
     * @return bool
     */
    public function isDetached()
    {
        return $this->result->isDetached($this->id);
    }

    /**
     * Marks row as detached (it means non-persisted)
     */
    public function detach()
    {
        $this->result->detach($this->id);
    }

    /**
     * Marks row as non-updated (isModified() returns false right after this method call)
     */
    public function markAsUpdated()
    {
        $this->result->markAsUpdated($this->id);
    }

    /**
     * Marks row as persisted
     *
     * @param int $id
     * @param string $table
     * @param DibiConnection $connection
     */
    public function markAsCreated($id, $table, DibiConnection $connection)
    {
        $this->id = $id;
        $this->result->markAsCreated($this->id, $table, $connection);
    }

    /**
     * Returns array of modified fields with new values
     *
     * @return array
     */
    public function getModifiedData()
    {
        return $this->result->getModifiedData($this->id);
    }

    /**
     * Clean in-memory cache of referenced rows
     *
     * @param string|null $table
     * @param string|null $column
     */
    public function cleanReferencedRowsCache($table = null, $column = null)
    {
        $this->result->cleanReferencedResultsCache($table, $column);
    }

    /**
     * Returns referenced LeanMapper\Row instance
     *
     * @param string $table
     * @param Closure|null $filter
     * @param string|null $viaColumn
     * @return Row
     */
    public function referenced($table, Closure $filter = null, $viaColumn = null)
    {
        return $this->result->getReferencedRow($this->id, $table, $filter, $viaColumn);
    }

    /**
     * Returns array of LeanMapper\Row instances referencing current row
     *
     * @param string $table
     * @param Closure|null $filter
     * @param string|null $viaColumn
     * @return Row[]
     */
    public function referencing($table, Closure $filter = null, $viaColumn = null)
    {
        return $this->result->getReferencingRows($this->id, $table, $filter, $viaColumn);
    }

}