<?php
/** @license MIT
 * Copyright 2017 J. King, Dustin Wilson et al.
 * See LICENSE and AUTHORS files for details */

declare(strict_types=1);
namespace JKingWeb\Arsse\REST;

use JKingWeb\Arsse\Misc\Date;
use JKingWeb\Arsse\Misc\ValueInfo;

abstract class AbstractHandler implements Handler {
    abstract public function __construct();
    abstract public function dispatch(Request $req): \Psr\Http\Message\ResponseInterface;

    protected function fieldMapNames(array $data, array $map): array {
        $out = [];
        foreach ($map as $to => $from) {
            if (array_key_exists($from, $data)) {
                $out[$to] = $data[$from];
            }
        }
        return $out;
    }
    
    protected function fieldMapTypes(array $data, array $map, string $dateFormat = "sql"): array {
        foreach ($map as $key => $type) {
            if (array_key_exists($key, $data)) {
                if ($type=="datetime" && $dateFormat != "sql") {
                    $data[$key] = Date::transform($data[$key], $dateFormat, "sql");
                } else {
                    settype($data[$key], $type);
                }
            }
        }
        return $data;
    }

    protected function normalizeInput(array $data, array $types, string $dateFormat = null, int $mode = 0): array {
        $out = [];
        foreach ($types as $key => $type) {
            if (isset($data[$key])) {
                $out[$key] = ValueInfo::normalize($data[$key], $type | $mode, $dateFormat);
            } else {
                $out[$key] = null;
            }
        }
        return $out;
    }
}