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<?php
/**
 * FlexiPeeHP - Objekt Žurnálu.
 *
 * @author     Vítězslav Dvořák <vitex@arachne.cz>
 * @copyright  (C) 2017 Spoje.Net
 */

namespace FlexiPeeHP;

/**
 * Žurnál změn
 * Journal of Changes
 *
 * @link https://demo.flexibee.eu/c/demo/adresar/properties položky evidence
 */
class Zurnal extends FlexiBeeRO
{
    /**
     * Evidence užitá objektem.
     *
     * @var string
     */
    public $evidence = 'zurnal';

    /**
     *
     * @var array
     */
    public static $evidenceToDb = ['faktura-vydana' => 'ddoklfak'];

    /**
     * Class for read only interaction with FlexiBee.
     *
     * @param mixed $init default record id or initial data
     * @param array $options Connection settings and other options override
     */
    public function __construct($init = null, $options = [])
    {
        parent::__construct($init, $options);
        foreach (EvidenceList::$evidences as $evidenceName => $evidenceProperties) {
            if (array_key_exists('dbName', $evidenceProperties)) {
                self::$evidenceToDb[$evidenceName] = $evidenceProperties['dbName'];
            }
        }
    }

    /**
     * obtain all record changes array
     *
     * Note: Do not use this method in production environment!
     *
     *       If you have no other choice pleas add indexes into wzurnal
     *       postgesql table:
     *
     *       CREATE INDEX CONCURRENTLY tname_index ON wzurnal (tabulka);
     *       CREATE INDEX CONCURRENTLY rid_index ON wzurnal (idZaznamu);
     *
     * @param FlexiBeeRO $object
     * @return array changes history
     */
    public function getAllChanges($object)
    {
        $changesArray = [];

        $evidence = $object->getEvidence();
        if (array_key_exists($evidence, self::$evidenceToDb)) {
            $dbTable = self::$evidenceToDb[$evidence];
            $changes = $this->getColumnsFromFlexibee('*',
                ['tabulka' => $dbTable, 'idZaznamu' => $object->getMyKey()]);

            foreach ($changes as $change) {
                $changesArray[$change['datCas']][$change['sloupec']] = $change;
            }
        }
        return $changesArray;
    }

    /**
     * obtain last change array
     *
     * @param FlexiBeeRO $object
     * @return array Old/New values pairs
     */
    public function getLastChange($object)
    {
        $lastChange = null;
        $allChanges = $this->getAllChanges($object);
        if (count($allChanges)) {
            $lastChange = end($allChanges);
        }
        return $lastChange;
    }
}