<?php

namespace PayPal\Api;

use PayPal\Common\PayPalModel;

/**
 * Class PaymentExecution
 *
 * Let's you execute a PayPal Account based Payment resource with the payer_id obtained from web approval url.
 *
 * @package PayPal\Api
 *
 * @property string payer_id
 * @property \PayPal\Api\Transaction[] transactions
 */
class PaymentExecution extends PayPalModel
{
    /**
     * PayPal assigned Payer ID returned in the approval return url.
     *
     * @param string $payer_id
     * 
     * @return $this
     */
    public function setPayerId($payer_id)
    {
        $this->payer_id = $payer_id;
        return $this;
    }

    /**
     * PayPal assigned Payer ID returned in the approval return url.
     *
     * @return string
     */
    public function getPayerId()
    {
        return $this->payer_id;
    }

    /**
     * Transaction information to be used at the time of execute payment. Only amount and shipping_address can be updated in execute payment
     *
     * @param \PayPal\Api\Transaction[] $transactions
     * 
     * @return $this
     */
    public function setTransactions($transactions)
    {
        $this->transactions = $transactions;
        return $this;
    }

    /**
     * Transaction information to be used at the time of execute payment. Only amount and shipping_address can be updated in execute payment
     *
     * @return \PayPal\Api\Transaction[]
     */
    public function getTransactions()
    {
        return $this->transactions;
    }

    /**
     * Append Transactions to the list.
     *
     * @param \PayPal\Api\Transaction $transaction
     * @return $this
     */
    public function addTransaction($transaction)
    {
        if (!$this->getTransactions()) {
            return $this->setTransactions(array($transaction));
        } else {
            return $this->setTransactions(
                array_merge($this->getTransactions(), array($transaction))
            );
        }
    }

    /**
     * Remove Transactions from the list.
     *
     * @param \PayPal\Api\Transaction $transaction
     * @return $this
     */
    public function removeTransaction($transaction)
    {
        return $this->setTransactions(
            array_diff($this->getTransactions(), array($transaction))
        );
    }

}