20834855301

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/src/Application/UI/Presenter.php

<?php

/**
 * This file is part of the Nette Framework (https://nette.org)
 * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
 */

declare(strict_types=1);

namespace Nette\Application\UI;

use Nette;
use Nette\Application;
use Nette\Application\Helpers;
use Nette\Application\LinkGenerator;
use Nette\Application\Responses;
use Nette\Http;
use Nette\Utils\Arrays;
use function array_slice, count, dirname, func_get_args, func_num_args, implode, in_array, is_array, is_dir, is_file, is_string, ltrim, preg_match, preg_replace, str_starts_with, strcasecmp, strlen, strncmp, strpos, strrpos, strtr, substr, substr_count, trigger_error, ucfirst;
use const DIRECTORY_SEPARATOR;


/**
 * Presenter component represents a webpage instance. It converts Request to Response.
 *
 * @property-deprecated Nette\Application\Request $request
 * @property-deprecated string $action
 * @property-deprecated      string $view
 * @property-deprecated      string|bool $layout
 * @property-read \stdClass $payload
 * @property-deprecated Nette\Http\Session $session
 * @property-read Nette\Security\User $user
 */
abstract class Presenter extends Control implements Application\IPresenter
{
        /** bad link handling {@link Presenter::$invalidLinkMode} */
        public const
                InvalidLinkSilent = 0b0000,
                InvalidLinkWarning = 0b0001,
                InvalidLinkException = 0b0010,
                InvalidLinkTextual = 0b0100;

        /** @internal special parameter key */
        public const
                PresenterKey = 'presenter',
                SignalKey = 'do',
                ActionKey = 'action',
                FlashKey = '_fid',
                DefaultAction = 'default';

        /** @deprecated use Presenter::InvalidLinkSilent */
        public const INVALID_LINK_SILENT = self::InvalidLinkSilent;

        /** @deprecated use Presenter::InvalidLinkWarning */
        public const INVALID_LINK_WARNING = self::InvalidLinkWarning;

        /** @deprecated use Presenter::InvalidLinkException */
        public const INVALID_LINK_EXCEPTION = self::InvalidLinkException;

        /** @deprecated use Presenter::InvalidLinkTextual */
        public const INVALID_LINK_TEXTUAL = self::InvalidLinkTextual;

        /** @deprecated use Presenter::PresenterKey */
        public const PRESENTER_KEY = self::PresenterKey;

        /** @deprecated use Presenter::SignalKey */
        public const SIGNAL_KEY = self::SignalKey;

        /** @deprecated use Presenter::ActionKey */
        public const ACTION_KEY = self::ActionKey;

        /** @deprecated use Presenter::FlashKey */
        public const FLASH_KEY = self::FlashKey;

        /** @deprecated use Presenter::DefaultAction */
        public const DEFAULT_ACTION = self::DefaultAction;

        public int $invalidLinkMode = self::InvalidLinkSilent;

        /** @var array<callable(self): void>  Occurs before starup() */
        public array $onStartup = [];

        /** @var array<callable(self): void>  Occurs before render*() and after beforeRender() */
        public array $onRender = [];

        /** @var array<callable(self, Application\Response): void>  Occurs before shutdown() */
        public array $onShutdown = [];

        /** automatically call canonicalize() */
        public bool $autoCanonicalize = true;

        /** use absolute Urls or paths? */
        public bool $absoluteUrls = false;

        /** @deprecated  use #[Requires(methods: ...)] to specify allowed methods */
        public array $allowedMethods = ['GET', 'POST', 'HEAD', 'PUT', 'DELETE', 'PATCH'];
        private ?Nette\Application\Request $request = null;
        private ?Nette\Application\Response $response = null;

        /** @var array<string, array<string, mixed>> */
        private array $globalParams = [];

        /** @var array<string, mixed> */
        private array $globalState;
        private ?array $globalStateSinces;
        private string $action = '';
        private string $view = '';
        private bool $forwarded = false;
        private string|bool $layout = '';
        private \stdClass $payload;
        private string $signalReceiver;
        private ?string $signal = null;
        private bool $ajaxMode;
        private bool $startupCheck = false;
        private readonly Nette\Http\IRequest $httpRequest;
        private readonly Nette\Http\IResponse $httpResponse;
        private readonly ?Nette\Http\Session $session;
        private readonly ?Nette\Security\User $user;
        private readonly ?TemplateFactory $templateFactory;
        private readonly LinkGenerator $linkGenerator;


        public function __construct()
        {
        }


        final public function getRequest(): ?Application\Request
        {
                return $this->request;
        }


        /**
         * Returns self.
         */
        final public function getPresenter(): static
        {
                return $this;
        }


        final public function getPresenterIfExists(): static
        {
                return $this;
        }


        /** @deprecated */
        final public function hasPresenter(): bool
        {
                return true;
        }


        /**
         * Returns a name that uniquely identifies component.
         */
        public function getUniqueId(): string
        {
                return '';
        }


        public function isModuleCurrent(string $module): bool
        {
                $current = Helpers::splitName($this->getName())[0];
                return str_starts_with($current . ':', ltrim($module . ':', ':'));
        }


        public function isForwarded(): bool
        {
                return $this->forwarded || $this->request->isMethod($this->request::FORWARD);
        }


        /********************* interface IPresenter ****************d*g**/


        public function run(Application\Request $request): Application\Response
        {
                $this->request = $request;
                $this->setParent($this->getParent(), $request->getPresenterName());

                if (!$this->httpResponse->isSent()) {
                        $this->httpResponse->addHeader('Vary', 'X-Requested-With');
                }

                $this->initGlobalParameters();

                try {
                        // CHECK REQUIREMENTS
                        (new AccessPolicy(static::getReflection()))->checkAccess($this);
                        $this->checkRequirements(static::getReflection());
                        $this->checkHttpMethod();

                        // STARTUP
                        Arrays::invoke($this->onStartup, $this);
                        $this->startup();
                        if (!$this->startupCheck) {
                                $class = static::getReflection()->getMethod('startup')->getDeclaringClass()->getName();
                                throw new Nette\InvalidStateException("Method $class::startup() or its parents doesn't call parent::startup().");
                        }

                        // calls $this->action<Action>()
                        try {
                                actionMethod:
                                $this->tryCall(static::formatActionMethod($this->action), $this->params);
                        } catch (Application\SwitchException $e) {
                                $this->changeAction($e->getMessage());
                                $this->autoCanonicalize = false;
                                goto actionMethod;
                        }

                        // autoload components
                        foreach ($this->globalParams as $id => $foo) {
                                $this->getComponent((string) $id, throw: false);
                        }

                        if ($this->autoCanonicalize) {
                                $this->canonicalize();
                        }

                        if ($this->httpRequest->isMethod('head')) {
                                $this->terminate();
                        }

                        // SIGNAL HANDLING
                        // calls $this->handle<Signal>()
                        $this->processSignal();

                        // RENDERING VIEW
                        $this->beforeRender();
                        Arrays::invoke($this->onRender, $this);
                        // calls $this->render<View>()
                        try {
                                renderMethod:
                                $this->tryCall(static::formatRenderMethod($this->view), $this->params);
                        } catch (Application\SwitchException $e) {
                                $this->setView($e->getMessage());
                                goto renderMethod;
                        }
                        $this->afterRender();

                        // finish template rendering
                        $this->sendTemplate();

                } catch (Application\SwitchException $e) {
                        throw new \LogicException('Switch is only allowed inside action*() or render*() method.', 0, $e);
                } catch (Application\AbortException) {
                }

                // save component tree persistent state
                $this->saveGlobalState();

                if ($this->isAjax()) {
                        $this->getPayload()->state = $this->getGlobalState();
                        try {
                                if ($this->response instanceof Responses\TextResponse && $this->isControlInvalid()) {
                                        $this->snippetMode = true;
                                        $this->response->send($this->httpRequest, $this->httpResponse);
                                        $this->sendPayload();
                                }
                        } catch (Application\AbortException) {
                        }
                }

                if ($this->hasFlashSession()) {
                        $this->getFlashSession()->setExpiration('30 seconds');
                }

                if (!$this->response) {
                        $this->response = new Responses\VoidResponse;
                }

                Arrays::invoke($this->onShutdown, $this, $this->response);
                $this->shutdown($this->response);

                return $this->response;
        }


        /**
         * @return void
         */
        protected function startup()
        {
                $this->startupCheck = true;
        }


        /**
         * Common render method.
         * @return void
         */
        protected function beforeRender()
        {
        }


        /**
         * Common render method.
         */
        protected function afterRender(): void
        {
        }


        protected function shutdown(Application\Response $response): void
        {
        }


        /**
         * This method will be called when CSRF is detected.
         */
        public function detectedCsrf(): void
        {
                try {
                        $this->redirect('this');
                } catch (InvalidLinkException $e) {
                        $this->error($e->getMessage());
                }
        }


        /** @deprecated  use #[Requires(methods: ...)] to specify allowed methods */
        protected function checkHttpMethod(): void
        {
                if ($this->allowedMethods &&
                        !in_array($method = $this->httpRequest->getMethod(), $this->allowedMethods, strict: true)
                ) {
                        $this->httpResponse->setHeader('Allow', implode(',', $this->allowedMethods));
                        $this->error("Method $method is not allowed", Nette\Http\IResponse::S405_MethodNotAllowed);
                }
        }


        /********************* signal handling ****************d*g**/


        /**
         * @throws BadSignalException
         */
        public function processSignal(): void
        {
                if (!isset($this->signal)) {
                        return;
                }

                $component = $this->signalReceiver === ''
                        ? $this
                        : $this->getComponent($this->signalReceiver, throw: false);
                if ($component === null) {
                        throw new BadSignalException("The signal receiver component '$this->signalReceiver' is not found.");

                } elseif (!$component instanceof SignalReceiver) {
                        throw new BadSignalException("The signal receiver component '$this->signalReceiver' is not SignalReceiver implementor.");
                }

                $component->signalReceived($this->signal);
                $this->signal = null;
        }


        /**
         * Returns pair signal receiver and name.
         */
        final public function getSignal(): ?array
        {
                return $this->signal === null ? null : [$this->signalReceiver, $this->signal];
        }


        /**
         * Checks if the signal receiver is the given one.
         */
        final public function isSignalReceiver(
                Nette\ComponentModel\Component|string $component,
                string|bool|null $signal = null,
        ): bool
        {
                if ($component instanceof Nette\ComponentModel\Component) {
                        $component = $component === $this
                                ? ''
                                : $component->lookupPath(self::class);
                }

                if ($this->signal === null) {
                        return false;

                } elseif ($signal === true) {
                        return $component === ''
                                || strncmp($this->signalReceiver . '-', $component . '-', strlen($component) + 1) === 0;

                } elseif ($signal === null) {
                        return $this->signalReceiver === $component;
                }

                return $this->signalReceiver === $component && strcasecmp($signal, $this->signal) === 0;
        }


        /********************* rendering ****************d*g**/


        /**
         * Returns current action name.
         */
        final public function getAction(bool $fullyQualified = false): string
        {
                return $fullyQualified
                        ? ':' . $this->getName() . ':' . $this->action
                        : $this->action;
        }


        /**
         * Changes current action.
         */
        public function changeAction(string $action): void
        {
                $this->forwarded = true;
                $this->action = $this->view = $action;
        }


        /**
         * Switch from current action or render method to another.
         */
        public function switch(string $action): never
        {
                throw new Application\SwitchException($action);
        }


        /**
         * Returns current view.
         */
        final public function getView(): string
        {
                return $this->view;
        }


        /**
         * Changes current view. Any name is allowed.
         */
        public function setView(string $view): static
        {
                $this->forwarded = true;
                $this->view = $view;
                return $this;
        }


        /**
         * Returns current layout name.
         */
        final public function getLayout(): string|bool
        {
                return $this->layout;
        }


        /**
         * Changes or disables layout.
         */
        public function setLayout(string|bool $layout): static
        {
                $this->layout = $layout === false ? false : (string) $layout;
                return $this;
        }


        /**
         * @throws Nette\Application\AbortException
         * @return never
         */
        public function sendTemplate(?Template $template = null): void
        {
                $template ??= $this->getTemplate();
                $this->completeTemplate($template);
                $this->sendResponse(new Responses\TextResponse($template));
        }


        /**
         * Completes template parameters and file before rendering.
         */
        protected function completeTemplate(Template $template): void
        {
                foreach ($this->getReflection()->getTemplateVariables($this) as $name) {
                        $template->$name ??= $this->$name;
                }
                if ($template->getFile() === null) {
                        $template->setFile($this->findTemplateFile());
                }
        }


        /**
         * Finds template file name.
         */
        public function findTemplateFile(): string
        {
                $files = $this->formatTemplateFiles();
                foreach ($files as $file) {
                        if (is_file($file)) {
                                return $file;
                        }
                }

                $file = strtr(Arrays::first($files), '/', DIRECTORY_SEPARATOR);
                $this->error("Page not found. Missing template '$file'.");
        }


        /**
         * Finds layout template file name.
         * @internal
         */
        public function findLayoutTemplateFile(): ?string
        {
                if ($this->layout === false) {
                        return null;
                }

                $files = $this->formatLayoutTemplateFiles();
                foreach ($files as $file) {
                        if (is_file($file)) {
                                return $file;
                        }
                }

                if ($this->layout) {
                        $file = strtr(Arrays::first($files), '/', DIRECTORY_SEPARATOR);
                        throw new Nette\FileNotFoundException("Layout not found. Missing template '$file'.");
                }

                return null;
        }


        /**
         * Formats layout template file names.
         * @return string[]
         */
        public function formatLayoutTemplateFiles(): array
        {
                if (preg_match('#/|\\\#', (string) $this->layout)) {
                        return [$this->layout];
                }

                $layout = $this->layout ?: 'layout';
                $dir = dirname(static::getReflection()->getFileName());
                $levels = substr_count($this->getName(), ':');
                if (!is_dir("$dir/templates")) {
                        $dir = dirname($origDir = $dir);
                        if (!is_dir("$dir/templates")) {
                                $list = ["$origDir/@$layout.latte"];
                                do {
                                        $list[] = "$dir/@$layout.latte";
                                } while ($levels-- && ($dir = dirname($dir)));
                                return $list;
                        }
                }

                [, $presenter] = Helpers::splitName($this->getName());
                $list = [
                        "$dir/templates/$presenter/@$layout.latte",
                        "$dir/templates/$presenter.@$layout.latte",
                ];
                do {
                        $list[] = "$dir/templates/@$layout.latte";
                } while ($levels-- && ($dir = dirname($dir)));

                return $list;
        }


        /**
         * Formats view template file names.
         * @return string[]
         */
        public function formatTemplateFiles(): array
        {
                $dir = dirname(static::getReflection()->getFileName());
                if (!is_dir("$dir/templates")) {
                        $dir = dirname($origDir = $dir);
                        if (!is_dir("$dir/templates")) {
                                return [
                                        "$origDir/$this->view.latte",
                                ];
                        }
                }

                [, $presenter] = Helpers::splitName($this->getName());
                return [
                        "$dir/templates/$presenter/$this->view.latte",
                        "$dir/templates/$presenter.$this->view.latte",
                ];
        }


        /**
         * Formats action method name.
         */
        public static function formatActionMethod(string $action): string
        {
                return 'action' . ucfirst($action);
        }


        /**
         * Formats render view method name.
         */
        public static function formatRenderMethod(string $view): string
        {
                return 'render' . ucfirst($view);
        }


        protected function createTemplate(?string $class = null): Template
        {
                $class ??= $this->formatTemplateClass();
                return $this->getTemplateFactory()->createTemplate($this, $class);
        }


        public function formatTemplateClass(): ?string
        {
                $base = preg_replace('#Presenter$#', '', static::class);
                return $this->checkTemplateClass($base . ucfirst($this->action) . 'Template')
                        ?? $this->checkTemplateClass($base . 'Template');
        }


        /********************* partial AJAX rendering ****************d*g**/


        final public function getPayload(): \stdClass
        {
                return $this->payload ??= new \stdClass;
        }


        /**
         * Is AJAX request?
         */
        public function isAjax(): bool
        {
                if (!isset($this->ajaxMode)) {
                        $this->ajaxMode = $this->httpRequest->isAjax();
                }

                return $this->ajaxMode;
        }


        /**
         * Sends AJAX payload to the output.
         * @throws Nette\Application\AbortException
         * @return never
         */
        public function sendPayload(): void
        {
                $this->sendResponse(new Responses\JsonResponse($this->getPayload()));
        }


        /**
         * Sends JSON data to the output.
         * @throws Nette\Application\AbortException
         * @return never
         */
        public function sendJson(mixed $data): void
        {
                $this->sendResponse(new Responses\JsonResponse($data));
        }


        /********************* navigation & flow ****************d*g**/


        /**
         * Sends response and terminates presenter.
         * @throws Nette\Application\AbortException
         * @return never
         */
        public function sendResponse(Application\Response $response): void
        {
                $this->response = $response;
                $this->terminate();
        }


        /**
         * Correctly terminates presenter.
         * @throws Nette\Application\AbortException
         * @return never
         */
        public function terminate(): void
        {
                throw new Application\AbortException;
        }


        /**
         * Forward to another presenter or action.
         * @param  array|mixed  $args
         * @throws Nette\Application\AbortException
         * @return never
         */
        public function forward(string|Nette\Application\Request $destination, $args = []): void
        {
                if ($destination instanceof Application\Request) {
                        $this->sendResponse(new Responses\ForwardResponse($destination));
                }

                $args = func_num_args() < 3 && is_array($args)
                        ? $args
                        : array_slice(func_get_args(), 1);
                $request = $this->linkGenerator->createRequest($this, $destination, $args, 'forward');
                $this->sendResponse(new Responses\ForwardResponse($request));
        }


        /**
         * Redirect to another URL and ends presenter execution.
         * @throws Nette\Application\AbortException
         * @return never
         */
        public function redirectUrl(string $url, ?int $httpCode = null): void
        {
                if ($this->isAjax()) {
                        $this->getPayload()->redirect = $url;
                        $this->sendPayload();

                } elseif (!$httpCode) {
                        $httpCode = $this->httpRequest->isMethod('post')
                                ? Http\IResponse::S303_PostGet
                                : Http\IResponse::S302_Found;
                }

                $this->sendResponse(new Responses\RedirectResponse($url, $httpCode));
        }


        /**
         * Returns the last created Request.
         * @internal
         */
        final public function getLastCreatedRequest(): ?Application\Request
        {
                return $this->linkGenerator->lastRequest;
        }


        /**
         * Returns the last created Request flag.
         * @internal
         */
        final public function getLastCreatedRequestFlag(string $flag): bool
        {
                return (bool) $this->linkGenerator->lastRequest?->hasFlag($flag);
        }


        /**
         * Conditional redirect to canonicalized URI.
         * @param  mixed  ...$args
         * @throws Nette\Application\AbortException
         */
        public function canonicalize(?string $destination = null, ...$args): void
        {
                $request = $this->request;
                if ($this->isAjax() || (!$request->isMethod('get') && !$request->isMethod('head'))) {
                        return;
                }

                $args = count($args) === 1 && is_array($args[0] ?? null)
                        ? $args[0]
                        : $args;
                try {
                        $url = $this->linkGenerator->link(
                                $destination ?: $this->action,
                                $args + $this->getGlobalState() + $request->getParameters(),
                                $this,
                                'redirectX',
                        );
                } catch (InvalidLinkException) {
                }

                if (!isset($url) || $this->httpRequest->getUrl()->isEqual($url)) {
                        return;
                }

                $code = $request->hasFlag($request::VARYING)
                        ? Http\IResponse::S302_Found
                        : Http\IResponse::S301_MovedPermanently;
                $this->sendResponse(new Responses\RedirectResponse($url, $code));
        }


        /**
         * Attempts to cache the sent entity by its last modification date.
         * @param  ?string  $etag  strong entity tag validator
         * @param  ?string  $expire  like '20 minutes'
         * @throws Nette\Application\AbortException
         */
        public function lastModified(
                string|int|\DateTimeInterface|null $lastModified,
                ?string $etag = null,
                ?string $expire = null,
        ): void
        {
                if ($expire !== null) {
                        $this->httpResponse->setExpiration($expire);
                }

                $helper = new Http\Context($this->httpRequest, $this->httpResponse);
                if (!$helper->isModified($lastModified, $etag)) {
                        $this->terminate();
                }
        }


        #[\Deprecated]
        protected function createRequest(Component $component, string $destination, array $args, string $mode): ?string
        {
                trigger_error(__METHOD__ . '() is deprecated', E_USER_DEPRECATED);
                return $this->linkGenerator->link($destination, $args, $component, $mode);
        }


        #[\Deprecated]
        public static function parseDestination(string $destination): array
        {
                trigger_error(__METHOD__ . '() is deprecated', E_USER_DEPRECATED);
                return LinkGenerator::parseDestination($destination);
        }


        #[\Deprecated]
        protected function requestToUrl(Application\Request $request, ?bool $relative = null): string
        {
                trigger_error(__METHOD__ . '() is deprecated', E_USER_DEPRECATED);
                return $this->linkGenerator->requestToUrl($request, $relative ?? !$this->absoluteUrls);
        }


        /**
         * Invalid link handler. Descendant can override this method to change default behaviour.
         * @throws InvalidLinkException
         */
        protected function handleInvalidLink(InvalidLinkException $e): string
        {
                if ($this->invalidLinkMode & self::InvalidLinkException) {
                        throw $e;
                } elseif ($this->invalidLinkMode & self::InvalidLinkWarning) {
                        trigger_error('Invalid link: ' . $e->getMessage(), E_USER_WARNING);
                }

                return $this->invalidLinkMode & self::InvalidLinkTextual
                        ? '#error: ' . $e->getMessage()
                        : '#';
        }


        /********************* request serialization ****************d*g**/


        /**
         * Stores current request to session.
         */
        public function storeRequest(string $expiration = '+ 10 minutes'): string
        {
                $session = $this->getSession('Nette.Application/requests');
                do {
                        $key = Nette\Utils\Random::generate(5);
                } while ($session->get($key));

                $session->set($key, [$this->user?->getId(), $this->request]);
                $session->setExpiration($expiration, $key);
                return $key;
        }


        /**
         * Restores request from session.
         */
        public function restoreRequest(string $key): void
        {
                $session = $this->getSession('Nette.Application/requests');
                $data = $session->get($key);
                if (!$data || ($data[0] !== null && $data[0] !== $this->getUser()->getId())) {
                        return;
                }

                $request = clone $data[1];
                $session->remove($key);
                $params = $request->getParameters();
                $params[self::FlashKey] = $this->getFlashKey();
                $request->setParameters($params);
                if ($request->isMethod('POST')) {
                        $request->setFlag(Application\Request::RESTORED, true);
                        $this->sendResponse(new Responses\ForwardResponse($request));
                } else {
                        $this->redirectUrl($this->linkGenerator->requestToUrl($request));
                }
        }


        /********************* interface StatePersistent ****************d*g**/


        /**
         * Descendant can override this method to return the names of custom persistent components.
         * @return string[]
         */
        public static function getPersistentComponents(): array
        {
                return [];
        }


        /**
         * Saves state information for all subcomponents to $this->globalState.
         * @return array<string, mixed>
         */
        public function getGlobalState(?string $forClass = null): array
        {
                $sinces = &$this->globalStateSinces;

                if (!isset($this->globalState)) {
                        $state = [];
                        foreach ($this->globalParams as $id => $params) {
                                $prefix = $id . self::NameSeparator;
                                foreach ($params as $key => $val) {
                                        $state[$prefix . $key] = $val;
                                }
                        }

                        $this->saveStatePartial($state, new ComponentReflection($forClass ?? $this));

                        if ($sinces === null) {
                                $sinces = [];
                                foreach ($this->getReflection()->getPersistentParams() as $name => $meta) {
                                        $sinces[$name] = $meta['since'];
                                }
                        }

                        $persistents = $this->getReflection()->getPersistentComponents();

                        foreach ($this->getComponentTree() as $component) {
                                if ($component->getParent() === $this) {
                                        // counts on child-first search
                                        $since = $persistents[$component->getName()]['since'] ?? false; // false = nonpersistent
                                }

                                if (!$component instanceof StatePersistent) {
                                        continue;
                                }

                                $prefix = $component->getUniqueId() . self::NameSeparator;
                                $params = [];
                                $component->saveState($params);
                                foreach ($params as $key => $val) {
                                        $state[$prefix . $key] = $val;
                                        $sinces[$prefix . $key] = $since;
                                }
                        }
                } else {
                        $state = $this->globalState;
                }

                if ($forClass !== null) {
                        $tree = Helpers::getClassesAndTraits($forClass);
                        $since = null;
                        foreach ($state as $key => $foo) {
                                if (!isset($sinces[$key])) {
                                        $x = strpos($key, self::NameSeparator);
                                        $x = $x === false ? $key : substr($key, 0, $x);
                                        $sinces[$key] = $sinces[$x] ?? false;
                                }

                                if ($since !== $sinces[$key]) {
                                        $since = $sinces[$key];
                                        $ok = $since && isset($tree[$since]);
                                }

                                if (!$ok) {
                                        unset($state[$key]);
                                }
                        }
                }

                return $state;
        }


        /**
         * Permanently saves state information for all subcomponents to $this->globalState.
         */
        protected function saveGlobalState(): void
        {
                $this->globalParams = [];
                $this->globalState = $this->getGlobalState();
        }


        /**
         * Initializes $this->globalParams, $this->signal & $this->signalReceiver, $this->action, $this->view. Called by run().
         * @throws Nette\Application\BadRequestException if action name is not valid
         */
        private function initGlobalParameters(): void
        {
                // init $this->globalParams
                $this->globalParams = [];
                $selfParams = [];

                $params = $this->request->getParameters();
                if (($tmp = $this->request->getPost('_' . self::SignalKey)) !== null) {
                        $params[self::SignalKey] = $tmp;
                } elseif ($this->isAjax()) {
                        $params += $this->request->getPost();
                        if (($tmp = $this->request->getPost(self::SignalKey)) !== null) {
                                $params[self::SignalKey] = $tmp;
                        }
                }

                foreach ($params as $key => $value) {
                        if (!preg_match('#^((?:[a-z0-9_]+-)*)((?!\d+$)[a-z0-9_]+)$#Di', (string) $key, $matches)) {
                                continue;
                        } elseif (!$matches[1]) {
                                $selfParams[$key] = $value;
                        } else {
                                $this->globalParams[substr($matches[1], 0, -1)][$matches[2]] = $value;
                        }
                }

                // init & validate $this->action & $this->view
                $action = $selfParams[self::ActionKey] ?? self::DefaultAction;
                if (!is_string($action) || !Nette\Utils\Strings::match($action, '#^[a-zA-Z0-9][a-zA-Z0-9_\x7f-\xff]*$#D')) {
                        $this->error('Action name is not valid.');
                }

                $this->changeAction($action);
                $this->forwarded = false;

                // init $this->signalReceiver and key 'signal' in appropriate params array
                $this->signalReceiver = $this->getUniqueId();
                if (isset($selfParams[self::SignalKey])) {
                        $param = $selfParams[self::SignalKey];
                        if (!is_string($param)) {
                                $this->error('Signal name is not string.');
                        }

                        $pos = strrpos($param, '-');
                        if ($pos) {
                                $this->signalReceiver = substr($param, 0, $pos);
                                $this->signal = substr($param, $pos + 1);
                        } else {
                                $this->signalReceiver = $this->getUniqueId();
                                $this->signal = $param;
                        }

                        if ($this->signal === '') {
                                $this->signal = null;
                        }
                }

                $this->loadState($selfParams);
        }


        /**
         * Pops parameters for specified component.
         * @return array<string, mixed>
         * @internal
         */
        final public function popGlobalParameters(string $id): array
        {
                $res = $this->globalParams[$id] ?? [];
                unset($this->globalParams[$id]);
                return $res;
        }


        /********************* flash session ****************d*g**/


        private function getFlashKey(): ?string
        {
                $flashKey = $this->getParameter(self::FlashKey);
                return is_string($flashKey) && $flashKey !== ''
                        ? $flashKey
                        : null;
        }


        /**
         * Checks if a flash session namespace exists.
         */
        public function hasFlashSession(): bool
        {
                $flashKey = $this->getFlashKey();
                return $flashKey !== null
                        && $this->getSession()->hasSection('Nette.Application.Flash/' . $flashKey);
        }


        /**
         * Returns session namespace provided to pass temporary data between redirects.
         */
        public function getFlashSession(): Http\SessionSection
        {
                $flashKey = $this->getFlashKey();
                if ($flashKey === null) {
                        $this->params[self::FlashKey] = $flashKey = Nette\Utils\Random::generate(4);
                }

                return $this->getSession('Nette.Application.Flash/' . $flashKey);
        }


        /********************* services ****************d*g**/


        final public function injectPrimary(
                Http\IRequest $httpRequest,
                Http\IResponse $httpResponse,
                ?Application\IPresenterFactory $presenterFactory = null,
                ?Nette\Routing\Router $router = null,
                ?Http\Session $session = null,
                ?Nette\Security\User $user = null,
                ?TemplateFactory $templateFactory = null,
        ): void
        {
                $this->httpRequest = $httpRequest;
                $this->httpResponse = $httpResponse;
                $this->session = $session;
                $this->user = $user;
                $this->templateFactory = $templateFactory;
                if ($router && $presenterFactory) {
                        $url = $httpRequest->getUrl();
                        $this->linkGenerator = new LinkGenerator(
                                $router,
                                new Http\UrlScript($url->getHostUrl() . $url->getScriptPath()),
                                $presenterFactory,
                        );
                }
        }


        final public function getHttpRequest(): Http\IRequest
        {
                return $this->httpRequest;
        }


        final public function getHttpResponse(): Http\IResponse
        {
                return $this->httpResponse;
        }


        final public function getSession(?string $namespace = null): Http\Session|Http\SessionSection
        {
                if (empty($this->session)) {
                        throw new Nette\InvalidStateException('Service Session has not been set.');
                }

                return $namespace === null
                        ? $this->session
                        : $this->session->getSection($namespace);
        }


        final public function getUser(): Nette\Security\User
        {
                return $this->user ?? throw new Nette\InvalidStateException('Service User has not been set.');
        }


        final public function getTemplateFactory(): TemplateFactory
        {
                return $this->templateFactory ?? throw new Nette\InvalidStateException('Service TemplateFactory has not been set.');
        }


        final protected function getLinkGenerator(): LinkGenerator
        {
                return $this->linkGenerator ?? throw new Nette\InvalidStateException('Unable to create link to other presenter, service PresenterFactory or Router has not been set.');
        }
}

nette / application / 20834855301

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