<?php

declare(strict_types=1);

/*
 * This file is part of the league/commonmark package.
 *
 * (c) Colin O'Dell <colinodell@gmail.com>
 *
 * Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js)
 *  - (c) John MacFarlane
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace League\CommonMark\Environment;

use League\CommonMark\Delimiter\DelimiterParser;
use League\CommonMark\Delimiter\Processor\DelimiterProcessorCollection;
use League\CommonMark\Delimiter\Processor\DelimiterProcessorInterface;
use League\CommonMark\Event\DocumentParsedEvent;
use League\CommonMark\Event\ListenerData;
use League\CommonMark\Exception\AlreadyInitializedException;
use League\CommonMark\Extension\CommonMark\CommonMarkCoreExtension;
use League\CommonMark\Extension\ConfigurableExtensionInterface;
use League\CommonMark\Extension\ExtensionInterface;
use League\CommonMark\Extension\GithubFlavoredMarkdownExtension;
use League\CommonMark\Normalizer\SlugNormalizer;
use League\CommonMark\Normalizer\TextNormalizerInterface;
use League\CommonMark\Normalizer\UniqueSlugNormalizer;
use League\CommonMark\Normalizer\UniqueSlugNormalizerInterface;
use League\CommonMark\Parser\Block\BlockStartParserInterface;
use League\CommonMark\Parser\Block\SkipLinesStartingWithLettersParser;
use League\CommonMark\Parser\Inline\InlineParserInterface;
use League\CommonMark\Renderer\NodeRendererInterface;
use League\CommonMark\Util\HtmlFilter;
use League\CommonMark\Util\PrioritizedList;
use League\Config\Configuration;
use League\Config\ConfigurationAwareInterface;
use League\Config\ConfigurationInterface;
use Nette\Schema\Expect;
use Psr\EventDispatcher\EventDispatcherInterface;
use Psr\EventDispatcher\ListenerProviderInterface;
use Psr\EventDispatcher\StoppableEventInterface;

final class Environment implements EnvironmentInterface, EnvironmentBuilderInterface, ListenerProviderInterface
{
    /**
     * @var ExtensionInterface[]
     *
     * @psalm-readonly-allow-private-mutation
     */
    private array $extensions = [];

    /**
     * @var ExtensionInterface[]
     *
     * @psalm-readonly-allow-private-mutation
     */
    private array $uninitializedExtensions = [];

    /** @psalm-readonly-allow-private-mutation */
    private bool $extensionsInitialized = false;

    /**
     * @var PrioritizedList<BlockStartParserInterface>
     *
     * @psalm-readonly
     */
    private PrioritizedList $blockStartParsers;

    /**
     * @var PrioritizedList<InlineParserInterface>
     *
     * @psalm-readonly
     */
    private PrioritizedList $inlineParsers;

    /** @psalm-readonly */
    private DelimiterProcessorCollection $delimiterProcessors;

    /**
     * @var array<string, PrioritizedList<NodeRendererInterface>>
     *
     * @psalm-readonly-allow-private-mutation
     */
    private array $renderersByClass = [];

    /**
     * @var PrioritizedList<ListenerData>
     *
     * @psalm-readonly-allow-private-mutation
     */
    private PrioritizedList $listenerData;

    private ?EventDispatcherInterface $eventDispatcher = null;

    /** @psalm-readonly */
    private Configuration $config;

    private ?TextNormalizerInterface $slugNormalizer = null;

    /**
     * @param array<string, mixed> $config
     */
    public function __construct(array $config = [])
    {
        $this->config = self::createDefaultConfiguration();
        $this->config->merge($config);

        $this->blockStartParsers   = new PrioritizedList();
        $this->inlineParsers       = new PrioritizedList();
        $this->listenerData        = new PrioritizedList();
        $this->delimiterProcessors = new DelimiterProcessorCollection();

        // Performance optimization: always include a block "parser" that aborts parsing if a line starts with a letter
        // and is therefore unlikely to match any lines as a block start.
        $this->addBlockStartParser(new SkipLinesStartingWithLettersParser(), 249);
    }

    public function getConfiguration(): ConfigurationInterface
    {
        return $this->config->reader();
    }

    /**
     * @deprecated Environment::mergeConfig() is deprecated since league/commonmark v2.0 and will be removed in v3.0. Configuration should be set when instantiating the environment instead.
     *
     * @param array<string, mixed> $config
     */
    public function mergeConfig(array $config): void
    {
        @\trigger_error('Environment::mergeConfig() is deprecated since league/commonmark v2.0 and will be removed in v3.0. Configuration should be set when instantiating the environment instead.', \E_USER_DEPRECATED);

        $this->assertUninitialized('Failed to modify configuration.');

        $this->config->merge($config);
    }

    public function addBlockStartParser(BlockStartParserInterface $parser, int $priority = 0): EnvironmentBuilderInterface
    {
        $this->assertUninitialized('Failed to add block start parser.');

        $this->blockStartParsers->add($parser, $priority);
        $this->injectEnvironmentAndConfigurationIfNeeded($parser);

        return $this;
    }

    public function addInlineParser(InlineParserInterface $parser, int $priority = 0): EnvironmentBuilderInterface
    {
        $this->assertUninitialized('Failed to add inline parser.');

        $this->inlineParsers->add($parser, $priority);
        $this->injectEnvironmentAndConfigurationIfNeeded($parser);

        return $this;
    }

    public function addDelimiterProcessor(DelimiterProcessorInterface $processor): EnvironmentBuilderInterface
    {
        $this->assertUninitialized('Failed to add delimiter processor.');
        $this->delimiterProcessors->add($processor);
        $this->injectEnvironmentAndConfigurationIfNeeded($processor);

        return $this;
    }

    public function addRenderer(string $nodeClass, NodeRendererInterface $renderer, int $priority = 0): EnvironmentBuilderInterface
    {
        $this->assertUninitialized('Failed to add renderer.');

        if (! isset($this->renderersByClass[$nodeClass])) {
            $this->renderersByClass[$nodeClass] = new PrioritizedList();
        }

        $this->renderersByClass[$nodeClass]->add($renderer, $priority);
        $this->injectEnvironmentAndConfigurationIfNeeded($renderer);

        return $this;
    }

    /**
     * {@inheritDoc}
     */
    public function getBlockStartParsers(): iterable
    {
        if (! $this->extensionsInitialized) {
            $this->initializeExtensions();
        }

        return $this->blockStartParsers->getIterator();
    }

    public function getDelimiterProcessors(): DelimiterProcessorCollection
    {
        if (! $this->extensionsInitialized) {
            $this->initializeExtensions();
        }

        return $this->delimiterProcessors;
    }

    /**
     * {@inheritDoc}
     */
    public function getRenderersForClass(string $nodeClass): iterable
    {
        if (! $this->extensionsInitialized) {
            $this->initializeExtensions();
        }

        // If renderers are defined for this specific class, return them immediately
        if (isset($this->renderersByClass[$nodeClass])) {
            return $this->renderersByClass[$nodeClass];
        }

        /** @psalm-suppress TypeDoesNotContainType -- Bug: https://github.com/vimeo/psalm/issues/3332 */
        while (\class_exists($parent ??= $nodeClass) && $parent = \get_parent_class($parent)) {
            if (! isset($this->renderersByClass[$parent])) {
                continue;
            }

            // "Cache" this result to avoid future loops
            return $this->renderersByClass[$nodeClass] = $this->renderersByClass[$parent];
        }

        return [];
    }

    /**
     * {@inheritDoc}
     */
    public function getExtensions(): iterable
    {
        return $this->extensions;
    }

    /**
     * Add a single extension
     *
     * @return $this
     */
    public function addExtension(ExtensionInterface $extension): EnvironmentBuilderInterface
    {
        $this->assertUninitialized('Failed to add extension.');

        $this->extensions[]              = $extension;
        $this->uninitializedExtensions[] = $extension;

        if ($extension instanceof ConfigurableExtensionInterface) {
            $extension->configureSchema($this->config);
        }

        return $this;
    }

    private function initializeExtensions(): void
    {
        // Initialize the slug normalizer
        $this->getSlugNormalizer();

        // Ask all extensions to register their components
        while (\count($this->uninitializedExtensions) > 0) {
            foreach ($this->uninitializedExtensions as $i => $extension) {
                $extension->register($this);
                unset($this->uninitializedExtensions[$i]);
            }
        }

        $this->extensionsInitialized = true;

        // Create the special delimiter parser if any processors were registered
        if ($this->delimiterProcessors->count() > 0) {
            $this->inlineParsers->add(new DelimiterParser($this->delimiterProcessors), PHP_INT_MIN);
        }
    }

    private function injectEnvironmentAndConfigurationIfNeeded(object $object): void
    {
        if ($object instanceof EnvironmentAwareInterface) {
            $object->setEnvironment($this);
        }

        if ($object instanceof ConfigurationAwareInterface) {
            $object->setConfiguration($this->config->reader());
        }
    }

    /**
     * @deprecated Instantiate the environment and add the extension yourself
     *
     * @param array<string, mixed> $config
     */
    public static function createCommonMarkEnvironment(array $config = []): Environment
    {
        $environment = new self($config);
        $environment->addExtension(new CommonMarkCoreExtension());

        return $environment;
    }

    /**
     * @deprecated Instantiate the environment and add the extension yourself
     *
     * @param array<string, mixed> $config
     */
    public static function createGFMEnvironment(array $config = []): Environment
    {
        $environment = new self($config);
        $environment->addExtension(new CommonMarkCoreExtension());
        $environment->addExtension(new GithubFlavoredMarkdownExtension());

        return $environment;
    }

    public function addEventListener(string $eventClass, callable $listener, int $priority = 0): EnvironmentBuilderInterface
    {
        $this->assertUninitialized('Failed to add event listener.');

        $this->listenerData->add(new ListenerData($eventClass, $listener), $priority);

        if (\is_object($listener)) {
            $this->injectEnvironmentAndConfigurationIfNeeded($listener);
        } elseif (\is_array($listener) && \is_object($listener[0])) {
            $this->injectEnvironmentAndConfigurationIfNeeded($listener[0]);
        }

        return $this;
    }

    public function dispatch(object $event): object
    {
        if (! $this->extensionsInitialized) {
            $this->initializeExtensions();
        }

        if ($this->eventDispatcher !== null) {
            return $this->eventDispatcher->dispatch($event);
        }

        foreach ($this->getListenersForEvent($event) as $listener) {
            if ($event instanceof StoppableEventInterface && $event->isPropagationStopped()) {
                return $event;
            }

            $listener($event);
        }

        return $event;
    }

    public function setEventDispatcher(EventDispatcherInterface $dispatcher): void
    {
        $this->eventDispatcher = $dispatcher;
    }

    /**
     * {@inheritDoc}
     *
     * @return iterable<callable>
     */
    public function getListenersForEvent(object $event): iterable
    {
        foreach ($this->listenerData as $listenerData) {
            \assert($listenerData instanceof ListenerData);

            /** @psalm-suppress ArgumentTypeCoercion */
            if (! \is_a($event, $listenerData->getEvent())) {
                continue;
            }

            yield function (object $event) use ($listenerData) {
                if (! $this->extensionsInitialized) {
                    $this->initializeExtensions();
                }

                return \call_user_func($listenerData->getListener(), $event);
            };
        }
    }

    /**
     * @return iterable<InlineParserInterface>
     */
    public function getInlineParsers(): iterable
    {
        if (! $this->extensionsInitialized) {
            $this->initializeExtensions();
        }

        return $this->inlineParsers->getIterator();
    }

    public function getSlugNormalizer(): TextNormalizerInterface
    {
        if ($this->slugNormalizer === null) {
            $normalizer = $this->config->get('slug_normalizer/instance');
            \assert($normalizer instanceof TextNormalizerInterface);
            $this->injectEnvironmentAndConfigurationIfNeeded($normalizer);

            if ($this->config->get('slug_normalizer/unique') !== UniqueSlugNormalizerInterface::DISABLED && ! $normalizer instanceof UniqueSlugNormalizer) {
                $normalizer = new UniqueSlugNormalizer($normalizer);
            }

            if ($normalizer instanceof UniqueSlugNormalizer) {
                if ($this->config->get('slug_normalizer/unique') === UniqueSlugNormalizerInterface::PER_DOCUMENT) {
                    $this->addEventListener(DocumentParsedEvent::class, [$normalizer, 'clearHistory'], -1000);
                }
            }

            $this->slugNormalizer = $normalizer;
        }

        return $this->slugNormalizer;
    }

    /**
     * @throws AlreadyInitializedException
     */
    private function assertUninitialized(string $message): void
    {
        if ($this->extensionsInitialized) {
            throw new AlreadyInitializedException($message . ' Extensions have already been initialized.');
        }
    }

    public static function createDefaultConfiguration(): Configuration
    {
        return new Configuration([
            'html_input' => Expect::anyOf(HtmlFilter::STRIP, HtmlFilter::ALLOW, HtmlFilter::ESCAPE)->default(HtmlFilter::ALLOW),
            'allow_unsafe_links' => Expect::bool(true),
            'max_nesting_level' => Expect::type('int')->default(PHP_INT_MAX),
            'renderer' => Expect::structure([
                'block_separator' => Expect::string("\n"),
                'inner_separator' => Expect::string("\n"),
                'soft_break' => Expect::string("\n"),
            ]),
            'slug_normalizer' => Expect::structure([
                'instance' => Expect::type(TextNormalizerInterface::class)->default(new SlugNormalizer()),
                'max_length' => Expect::int()->min(0)->default(255),
                'unique' => Expect::anyOf(UniqueSlugNormalizerInterface::DISABLED, UniqueSlugNormalizerInterface::PER_ENVIRONMENT, UniqueSlugNormalizerInterface::PER_DOCUMENT)->default(UniqueSlugNormalizerInterface::PER_DOCUMENT),
            ]),
        ]);
    }
}

• [F] Environment.php
  Delete
• [F] EnvironmentAwareInterface.php
  Delete
• [F] EnvironmentBuilderInterface.php
  Delete
• [F] EnvironmentInterface.php
  Delete

How To Payment

Simple Steps to Complete Your Payment Securely and Efficiently

Making a payment on our website is quick and secure. Start by logging in or creating an account. Select your preferred payment method, input the required details, and review the information. Once you confirm everything is correct, click on the "Submit Payment" button. You’ll receive instant confirmation and can track your payment status through your account dashboard. It’s an easy and secure process.

• Go to the Payment Section: Access the payment area on our website or app.
• Choose Your Payment Method: Select your preferred payment option.
• Enter Payment Details: Provide the necessary payment information.
• Verify Your Information: Check that all details are correct.
• Confirm Your Payment: Click "Submit Payment" to complete the transaction.