softuni.bg php 2017 Problem 3. Shopping Spree

<?php
declare(strict_types = 1);

class Person
{
    private $name;
    private $money;
    private $bag = [];

    public function __construct(string $name, float $money)
    {
        $this->setName($name);
        $this->setMoney($money);

    }

    /**
     * @return mixed
     */
    public function getName()
    {
        return $this->name;
    }

    /**
     * @param $name
     * @throws Exception
     */
    private function setName($name)
    {
        if (empty($name) ) {
            throw new Exception("Name cannot be empty");
        }
        $this->name = $name;
    }

    /**
     * @return mixed
     */
    public function getMoney()
    {
        return $this->money;
    }

    /**
     * @param $money
     * @throws Exception
     */
    public function setMoney($money)
    {
        if ($money < 0) {
            throw new Exception("Money cannot be negative");
        }
        $this->money = $money;
    }

    /**
     * @return array
     */
    public function getBag()
    {
        return $this->bag;
    }

    /**
     * @param array $bag
     */
    public function setBag($bag)
    {
        $this->bag = $bag;
    }

    public function addToBag($bag)
    {
        $this->bag[] = $bag;
    }


}

class Product
{
    private $name;
    private $cost;

    /**
     * Product constructor.
     * @param $name
     * @param $cost
     */
    public function __construct($name, $cost)
    {
        $this->setName($name);
        $this->setCost($cost);
    }

    /**
     * @return $name
     */
    public function getName()
    {
        return $this->name;
    }

    /**
     * @return mixed
     */
    public function getCost()
    {
        return $this->cost;
    }

    /**
     * @param mixed $name
     */
    public function setName($name)
    {
        if (empty($name) ) {
            throw new Exception("Name cannot be empty");
        }
        $this->name = $name;
    }

    /**
     * @param mixed $cost
     */
    public function setCost($cost)
    {
        if ($cost <= 0) {
            throw new Exception("Cost cannot be negative");
        }
        $this->cost = $cost;
    }


}

$persons = [];
$products = [];



$cmd = trim(fgets(STDIN));
$personsInput = explode(";", $cmd);



    for ($i = 0; $i < count($personsInput) - 1; $i++) {
        $person = $personsInput[$i];
        $personI = explode("=", $person);

        try {
            $name = $personI[0];
            $money = intval($personI[1]);
            $persons[] = new Person($name, $money);

        }

        catch (Exception $e) {
            echo $e->getMessage() . PHP_EOL;
            goto byebye;
        }
    }



$cmd = trim(fgets(STDIN));
$productsInput = explode(";", $cmd);



    for ($j = 0; $j < count($personsInput) - 1; $j++) {
        $productBi = $productsInput[$j];
        $productI = explode("=", $productBi);

        try {

            $name = $productI[0];
            $cost = intval($productI[1]);
            $products[] = new Product($name, $cost);
        }
        catch (Exception $e) {
                echo $e->getMessage() . PHP_EOL;
                goto byebye;
            }
    }


function buy(string $buyer1, string $product1, array $persons, array $products)
{
    // echo "test person input " . $buyer1 . PHP_EOL;
    foreach ($persons as $key) {

        if ($buyer1 == $key->getName()) {
            // echo "test buyer1 1 " . $buyer1 . PHP_EOL;
            $buyer = $key;
            break;
        }
    }

    foreach ($products as $key) {
        if ($product1 == $key->getName()) {
            // echo "test product " . $key->getName() . PHP_EOL;
            $prodcut = $key;
            break;
        }
    }

        if ($prodcut->getCost() > $buyer->getMoney()) {
            echo $buyer->getName() . " can't afford " . $prodcut->getName() . PHP_EOL;
        } else {
            $buyerMoney = $buyer->getMoney();
            $buyerMoney -= $prodcut->getCost();
            $buyer->setMoney($buyerMoney);
            $buyer->addToBag($prodcut->getName());
            echo $buyer->getName() . " bought " . $prodcut->getName() . PHP_EOL;
        }


}

$cmd = trim(fgets(STDIN));
while ($cmd != 'END') {
    $tokens = explode(" ", $cmd);
    $buyer = $tokens[0];
    $product = $tokens[1];

    buy($buyer, $product, $persons, $products);

    $cmd = trim(fgets(STDIN));
}

$personsPurchingList = "";

//foreach ($persons as $key1) {

for ($i = 0; $i < count($persons); $i++){
    $personsPurching = $persons[$i]->getBag();

    if (count($personsPurching) == 0) {
        echo $persons[$i]->getName() . ' - ' . 'Nothing bought' . PHP_EOL;
        }
    elseif (count($personsPurching) == 1) {
        echo $persons[$i]->getName() . ' - ' . $personsPurching[0] . PHP_EOL;
    }

    else {
            for ($j = 0; $j<count($personsPurching)-1;$j++){
                $personsPurchingList .= $personsPurching[$j];
                $personsPurchingList .= ',';
            }
        $personsPurchingList .= $personsPurching[$j];

            echo $persons[$i]->getName() . ' - ' . $personsPurchingList . PHP_EOL;
            $personsPurchingList = "";
        }


}

byebye:

while ($cmd != 'END') {

    $cmd = trim(fgets(STDIN));
}