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<?php

declare (strict_types=1);
namespace WPForms\Vendor\Square\Models;

use stdClass;
/**
 * Information about fulfillment updates.
 */
class OrderFulfillmentUpdatedUpdate implements \JsonSerializable
{
    /**
     * @var array
     */
    private $fulfillmentUid = [];
    /**
     * @var string|null
     */
    private $oldState;
    /**
     * @var string|null
     */
    private $newState;
    /**
     * Returns Fulfillment Uid.
     * A unique ID that identifies the fulfillment only within this order.
     */
    public function getFulfillmentUid() : ?string
    {
        if (\count($this->fulfillmentUid) == 0) {
            return null;
        }
        return $this->fulfillmentUid['value'];
    }
    /**
     * Sets Fulfillment Uid.
     * A unique ID that identifies the fulfillment only within this order.
     *
     * @maps fulfillment_uid
     */
    public function setFulfillmentUid(?string $fulfillmentUid) : void
    {
        $this->fulfillmentUid['value'] = $fulfillmentUid;
    }
    /**
     * Unsets Fulfillment Uid.
     * A unique ID that identifies the fulfillment only within this order.
     */
    public function unsetFulfillmentUid() : void
    {
        $this->fulfillmentUid = [];
    }
    /**
     * Returns Old State.
     * The current state of this fulfillment.
     */
    public function getOldState() : ?string
    {
        return $this->oldState;
    }
    /**
     * Sets Old State.
     * The current state of this fulfillment.
     *
     * @maps old_state
     */
    public function setOldState(?string $oldState) : void
    {
        $this->oldState = $oldState;
    }
    /**
     * Returns New State.
     * The current state of this fulfillment.
     */
    public function getNewState() : ?string
    {
        return $this->newState;
    }
    /**
     * Sets New State.
     * The current state of this fulfillment.
     *
     * @maps new_state
     */
    public function setNewState(?string $newState) : void
    {
        $this->newState = $newState;
    }
    /**
     * Encode this object to JSON
     *
     * @param bool $asArrayWhenEmpty Whether to serialize this model as an array whenever no fields
     *        are set. (default: false)
     *
     * @return array|stdClass
     */
    #[\ReturnTypeWillChange]
    public function jsonSerialize(bool $asArrayWhenEmpty = \false)
    {
        $json = [];
        if (!empty($this->fulfillmentUid)) {
            $json['fulfillment_uid'] = $this->fulfillmentUid['value'];
        }
        if (isset($this->oldState)) {
            $json['old_state'] = $this->oldState;
        }
        if (isset($this->newState)) {
            $json['new_state'] = $this->newState;
        }
        $json = \array_filter($json, function ($val) {
            return $val !== null;
        });
        return !$asArrayWhenEmpty && empty($json) ? new stdClass() : $json;
    }
}