<?php
declare(strict_types=1);

namespace App\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * A finished loan. It has a surrogate key because Doctrine cannot use dates in identifiers;
 * the (book, at) pair stays unique through a constraint on each concrete table.
 */
#[ORM\MappedSuperclass]
abstract class AbstractBorrowHistory {
	#[ORM\Id]
	#[ORM\GeneratedValue]
	#[ORM\Column]
	private ?int $id = null;

	#[ORM\Column(length: 255)]
	private string $who;

	#[ORM\Column]
	private \DateTimeImmutable $at;

	#[ORM\Column]
	private \DateTimeImmutable $till;

	public function __construct(string $who, \DateTimeImmutable $at, \DateTimeImmutable $till) {
		$this->who = $who;
		$this->at = $at;
		$this->till = $till;
	}

	public function getId(): ?int {
		return $this->id;
	}

	public function getWho(): string {
		return $this->who;
	}

	public function getAt(): \DateTimeImmutable {
		return $this->at;
	}

	public function getTill(): \DateTimeImmutable {
		return $this->till;
	}
}