<?php

/*
 * Copyright 2012 Johannes M. Schmitt <schmittjoh@gmail.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace PhpOption;

use Traversable;

/**
 * @template T
 *
 * @extends Option<T>
 */
final class LazyOption extends Option
{
    /** @var callable(mixed...):(Option<T>) */
    private $callback;

    /** @var array<int, mixed> */
    private $arguments;

    /** @var Option<T>|null */
    private $option;

    /**
     * @template S
     * @param callable(mixed...):(Option<S>) $callback
     * @param array<int, mixed>              $arguments
     *
     * @return LazyOption<S>
     */
    public static function create($callback, array $arguments = []): self
    {
        return new self($callback, $arguments);
    }

    /**
     * @param callable(mixed...):(Option<T>) $callback
     * @param array<int, mixed>              $arguments
     */
    public function __construct($callback, array $arguments = [])
    {
        if (!is_callable($callback)) {
            throw new \InvalidArgumentException('Invalid callback given');
        }

        $this->callback = $callback;
        $this->arguments = $arguments;
    }

    public function isDefined(): bool
    {
        return $this->option()->isDefined();
    }

    public function isEmpty(): bool
    {
        return $this->option()->isEmpty();
    }

    public function get()
    {
        return $this->option()->get();
    }

    public function getOrElse($default)
    {
        return $this->option()->getOrElse($default);
    }

    public function getOrCall($callable)
    {
        return $this->option()->getOrCall($callable);
    }

    public function getOrThrow(\Exception $ex)
    {
        return $this->option()->getOrThrow($ex);
    }

    public function orElse(Option $else)
    {
        return $this->option()->orElse($else);
    }

    public function ifDefined($callable)
    {
        $this->option()->forAll($callable);
    }

    public function forAll($callable)
    {
        return $this->option()->forAll($callable);
    }

    public function map($callable)
    {
        return $this->option()->map($callable);
    }

    public function flatMap($callable)
    {
        return $this->option()->flatMap($callable);
    }

    public function filter($callable)
    {
        return $this->option()->filter($callable);
    }

    public function filterNot($callable)
    {
        return $this->option()->filterNot($callable);
    }

    public function select($value)
    {
        return $this->option()->select($value);
    }

    public function reject($value)
    {
        return $this->option()->reject($value);
    }

    /**
     * @return Traversable<T>
     */
    public function getIterator(): Traversable
    {
        return $this->option()->getIterator();
    }

    public function foldLeft($initialValue, $callable)
    {
        return $this->option()->foldLeft($initialValue, $callable);
    }

    public function foldRight($initialValue, $callable)
    {
        return $this->option()->foldRight($initialValue, $callable);
    }

    /**
     * @return Option<T>
     */
    private function option(): Option
    {
        if (null === $this->option) {
            /** @var mixed */
            $option = call_user_func_array($this->callback, $this->arguments);
            if ($option instanceof Option) {
                $this->option = $option;
            } else {
                throw new \RuntimeException(sprintf('Expected instance of %s', Option::class));
            }
        }

        return $this->option;
    }
}

• [F] LazyOption.php
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• [F] None.php
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• [F] Option.php
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• [F] Some.php
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About Section

About NFC Pay: Our Story and Mission

NFC Pay was founded with a vision to transform the way people handle transactions. Our journey is defined by a commitment to innovation, security, and convenience. We strive to deliver seamless, user-friendly payment solutions that make everyday transactions effortless and secure. Our mission is to empower you to pay with ease and confidence, anytime, anywhere.

• Simplifying Payments, One Tap at a Time.
• Reinventing Your Wallet for Modern Convenience.
• Smart Payments for a Effortless Lifestyle.
• Experience the Ease of Tap and Pay.
• Innovative Solutions for Your Daily Transactions.

FAQ Section

Frequently Asked Questions About NFC Pay

Here are answers to some common questions about NFC Pay. We aim to provide clear and concise information to help you understand how our platform works and how it can benefit you. If you have any further inquiries, please don’t hesitate to contact our support team.

How do I register for NFC Pay?

Download the app and sign up using your email or phone number, then complete the verification process.

Is my payment information secure?

Yes, we use advanced encryption and security protocols to protect your payment details.

Can I add multiple cards to my NFC Pay wallet?

Absolutely, you can link multiple debit or credit cards to your wallet.

How do I transfer money to another user?

Go to the transfer section, select the recipient, enter the amount, and authorize the transfer.

What should I do if I forget my PIN?

Use the “Forgot PIN” feature in the app to reset it following the provided instructions.

How can I activate my merchant account?

Sign up for a merchant account through the app and follow the setup instructions to start accepting payments.

Can I track my payment status?

Yes, you can view and track your payment status in the account dashboard