<?php

declare(strict_types=1);

/*
 * This file is a part of dflydev/dot-access-data.
 *
 * (c) Dragonfly Development Inc.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Dflydev\DotAccessData;

use ArrayAccess;
use Dflydev\DotAccessData\Exception\DataException;
use Dflydev\DotAccessData\Exception\InvalidPathException;
use Dflydev\DotAccessData\Exception\MissingPathException;

/**
 * @implements ArrayAccess<string, mixed>
 */
class Data implements DataInterface, ArrayAccess
{
    private const DELIMITERS = ['.', '/'];

    /**
     * Internal representation of data data
     *
     * @var array<string, mixed>
     */
    protected $data;

    /**
     * Constructor
     *
     * @param array<string, mixed> $data
     */
    public function __construct(array $data = [])
    {
        $this->data = $data;
    }

    /**
     * {@inheritdoc}
     */
    public function append(string $key, $value = null): void
    {
        $currentValue =& $this->data;
        $keyPath = self::keyToPathArray($key);

        $endKey = array_pop($keyPath);
        foreach ($keyPath as $currentKey) {
            if (! isset($currentValue[$currentKey])) {
                $currentValue[$currentKey] = [];
            }
            $currentValue =& $currentValue[$currentKey];
        }

        if (!isset($currentValue[$endKey])) {
            $currentValue[$endKey] = [];
        }

        if (!is_array($currentValue[$endKey])) {
            // Promote this key to an array.
            // TODO: Is this really what we want to do?
            $currentValue[$endKey] = [$currentValue[$endKey]];
        }

        $currentValue[$endKey][] = $value;
    }

    /**
     * {@inheritdoc}
     */
    public function set(string $key, $value = null): void
    {
        $currentValue =& $this->data;
        $keyPath = self::keyToPathArray($key);

        $endKey = array_pop($keyPath);
        foreach ($keyPath as $currentKey) {
            if (!isset($currentValue[$currentKey])) {
                $currentValue[$currentKey] = [];
            }
            if (!is_array($currentValue[$currentKey])) {
                throw new DataException(sprintf('Key path "%s" within "%s" cannot be indexed into (is not an array)', $currentKey, self::formatPath($key)));
            }
            $currentValue =& $currentValue[$currentKey];
        }
        $currentValue[$endKey] = $value;
    }

    /**
     * {@inheritdoc}
     */
    public function remove(string $key): void
    {
        $currentValue =& $this->data;
        $keyPath = self::keyToPathArray($key);

        $endKey = array_pop($keyPath);
        foreach ($keyPath as $currentKey) {
            if (!isset($currentValue[$currentKey])) {
                return;
            }
            $currentValue =& $currentValue[$currentKey];
        }
        unset($currentValue[$endKey]);
    }

    /**
     * {@inheritdoc}
     *
     * @psalm-mutation-free
     */
    public function get(string $key, $default = null)
    {
        /** @psalm-suppress ImpureFunctionCall */
        $hasDefault = \func_num_args() > 1;

        $currentValue = $this->data;
        $keyPath = self::keyToPathArray($key);

        foreach ($keyPath as $currentKey) {
            if (!is_array($currentValue) || !array_key_exists($currentKey, $currentValue)) {
                if ($hasDefault) {
                    return $default;
                }

                throw new MissingPathException($key, sprintf('No data exists at the given path: "%s"', self::formatPath($keyPath)));
            }

            $currentValue = $currentValue[$currentKey];
        }

        return $currentValue === null ? $default : $currentValue;
    }

    /**
     * {@inheritdoc}
     *
     * @psalm-mutation-free
     */
    public function has(string $key): bool
    {
        $currentValue = $this->data;

        foreach (self::keyToPathArray($key) as $currentKey) {
            if (
                !is_array($currentValue) ||
                !array_key_exists($currentKey, $currentValue)
            ) {
                return false;
            }
            $currentValue = $currentValue[$currentKey];
        }

        return true;
    }

    /**
     * {@inheritdoc}
     *
     * @psalm-mutation-free
     */
    public function getData(string $key): DataInterface
    {
        $value = $this->get($key);
        if (is_array($value) && Util::isAssoc($value)) {
            return new Data($value);
        }

        throw new DataException(sprintf('Value at "%s" could not be represented as a DataInterface', self::formatPath($key)));
    }

    /**
     * {@inheritdoc}
     */
    public function import(array $data, int $mode = self::REPLACE): void
    {
        $this->data = Util::mergeAssocArray($this->data, $data, $mode);
    }

    /**
     * {@inheritdoc}
     */
    public function importData(DataInterface $data, int $mode = self::REPLACE): void
    {
        $this->import($data->export(), $mode);
    }

    /**
     * {@inheritdoc}
     *
     * @psalm-mutation-free
     */
    public function export(): array
    {
        return $this->data;
    }

    /**
     * {@inheritdoc}
     *
     * @return bool
     */
    #[\ReturnTypeWillChange]
    public function offsetExists($key)
    {
        return $this->has($key);
    }

    /**
     * {@inheritdoc}
     *
     * @return mixed
     */
    #[\ReturnTypeWillChange]
    public function offsetGet($key)
    {
        return $this->get($key, null);
    }

    /**
     * {@inheritdoc}
     *
     * @param string $key
     * @param mixed $value
     *
     * @return void
     */
    #[\ReturnTypeWillChange]
    public function offsetSet($key, $value)
    {
        $this->set($key, $value);
    }

    /**
     * {@inheritdoc}
     *
     * @return void
     */
    #[\ReturnTypeWillChange]
    public function offsetUnset($key)
    {
        $this->remove($key);
    }

    /**
     * @param string $path
     *
     * @return string[]
     *
     * @psalm-return non-empty-list<string>
     *
     * @psalm-pure
     */
    protected static function keyToPathArray(string $path): array
    {
        if (\strlen($path) === 0) {
            throw new InvalidPathException('Path cannot be an empty string');
        }

        $path = \str_replace(self::DELIMITERS, '.', $path);

        return \explode('.', $path);
    }

    /**
     * @param string|string[] $path
     *
     * @return string
     *
     * @psalm-pure
     */
    protected static function formatPath($path): string
    {
        if (is_string($path)) {
            $path = self::keyToPathArray($path);
        }

        return implode(' » ', $path);
    }
}

• [D] Exception
• [F] Data.php
  Delete
• [F] DataInterface.php
  Delete
• [F] Util.php
  Delete

Categories

• Blog 1
• Payment 1
• Competitive Research 1
• Information Technology 0

Recent Posts

Mar 27, 2024

The Future of Digital Wallets:...

Mar 27, 2024

The Rise of Contactless Payments:...

Enhancing Payment Security: The Role of Encryption and Tokenization in Digital Transactions

As digital transactions proliferate, ensuring robust payment security is more critical than ever. Two foundational technologies that are pivotal in this effort are encryption and tokenization.
Encryption is a process that transforms data into a secure format, known as ciphertext, which can only be deciphered using a specific decryption key. This means that even if data is intercepted during transmission, it remains unreadable and protected from unauthorized access. Encryption is essential in safeguarding sensitive payment information, such as credit card details and personal data, during online transactions.
Tokenization, on the other hand, involves substituting sensitive data with unique identifiers or "tokens." These tokens serve as placeholders and have no value outside of the specific transaction context. If intercepted, tokens are meaningless and cannot be used to access the original sensitive data. This method significantly reduces the risk of fraud and data breaches, as the actual payment information is not stored or transmitted.
Together, encryption and tokenization form a powerful security framework. Encryption ensures that data is protected during transmission, while tokenization minimizes the risk of exposing sensitive information by replacing it with secure, non-sensitive tokens.
These technologies are integral to modern payment platforms, providing a robust defense against cyber threats. By implementing advanced encryption and tokenization techniques, businesses can enhance the security of digital transactions, ensuring that users' financial and personal information remains safe. This comprehensive approach not only builds user trust but also fortifies the overall security infrastructure of digital payment systems. As cyber threats evolve, the continued advancement of encryption and tokenization will be crucial in maintaining secure and reliable payment processes.

Tags

• Payment