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<?php |
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/** |
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* webtrees: online genealogy |
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* Copyright (C) 2019 webtrees development team |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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declare(strict_types=1); |
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namespace Fisharebest\Webtrees; |
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use Exception; |
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use Illuminate\Support\Str; |
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use InvalidArgumentException; |
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use LogicException; |
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use RuntimeException; |
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use Throwable; |
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use function array_key_exists; |
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use function explode; |
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use function extract; |
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use function implode; |
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use function is_file; |
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use function ob_end_clean; |
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use function ob_get_level; |
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use function ob_start; |
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use function sha1; |
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use const EXTR_OVERWRITE; |
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/** |
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* Simple view/template class. |
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*/ |
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class View |
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{ |
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public const NAMESPACE_SEPARATOR = '::'; |
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// File extension for our template files. |
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private const TEMPLATE_EXTENSION = '.phtml'; |
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/** |
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* @var string The (file) name of the view. |
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*/ |
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private $name; |
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/** |
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* @var mixed[] Data to be inserted into the view. |
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*/ |
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private $data; |
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/** |
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* @var string[] Where do the templates live, for each namespace. |
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*/ |
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private static $namespaces = [ |
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'' => Webtrees::ROOT_DIR . 'resources/views/', |
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]; |
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/** |
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* @var string[] Modules can replace core views with their own. |
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*/ |
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private static $replacements = []; |
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/** |
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* @var string Implementation of Blade "stacks". |
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*/ |
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private static $stack; |
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/** |
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* @var array[] Implementation of Blade "stacks". |
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*/ |
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private static $stacks = []; |
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/** |
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* Createa view from a template name and optional data. |
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* |
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* @param string $name |
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* @param array $data |
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*/ |
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public function __construct(string $name, $data = []) |
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{ |
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$this->name = $name; |
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$this->data = $data; |
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} |
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/** |
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* Implementation of Blade "stacks". |
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* |
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* @see https://laravel.com/docs/5.5/blade#stacks |
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* |
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* @param string $stack |
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* |
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* @return void |
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*/ |
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public static function push(string $stack): void |
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{ |
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self::$stack = $stack; |
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ob_start(); |
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} |
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/** |
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* Implementation of Blade "stacks". |
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* |
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* @return void |
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*/ |
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public static function endpush(): void |
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{ |
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$content = ob_get_clean(); |
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if ($content === false) { |
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throw new LogicException('found endpush(), but did not find push()'); |
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} |
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self::$stacks[self::$stack][] = $content; |
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} |
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/** |
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* Variant of push that will only add one copy of each item. |
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* |
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* @param string $stack |
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* |
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* @return void |
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*/ |
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public static function pushunique(string $stack): void |
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{ |
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self::$stack = $stack; |
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ob_start(); |
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} |
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/** |
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* Variant of push that will only add one copy of each item. |
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* |
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* @return void |
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*/ |
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public static function endpushunique(): void |
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{ |
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$content = ob_get_clean(); |
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if ($content === false) { |
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throw new LogicException('found endpushunique(), but did not find pushunique()'); |
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} |
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self::$stacks[self::$stack][sha1($content)] = $content; |
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} |
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/** |
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* Implementation of Blade "stacks". |
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* |
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* @param string $stack |
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* |
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* @return string |
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*/ |
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public static function stack(string $stack): string |
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{ |
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$content = implode('', self::$stacks[$stack] ?? []); |
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self::$stacks[$stack] = []; |
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return $content; |
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} |
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/** |
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* Render a view. |
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* |
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* @return string |
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* @throws Throwable |
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*/ |
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public function render(): string |
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{ |
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extract($this->data, EXTR_OVERWRITE); |
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try { |
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ob_start(); |
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// Do not use require, so we can catch errors for missing files |
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include $this->getFilenameForView($this->name); |
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return ob_get_clean(); |
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} catch (Throwable $ex) { |
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while (ob_get_level() > 0) { |
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ob_end_clean(); |
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} |
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throw $ex; |
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} |
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} |
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/** |
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* @param string $namespace |
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* @param string $path |
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* |
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* @throws InvalidArgumentException |
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*/ |
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public static function registerNamespace(string $namespace, string $path): void |
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{ |
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if ($namespace === '') { |
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throw new InvalidArgumentException('Cannot register the default namespace'); |
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} |
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if (!Str::endsWith($path, '/')) { |
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throw new InvalidArgumentException('Paths must end with a directory separator'); |
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} |
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self::$namespaces[$namespace] = $path; |
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} |
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/** |
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* @param string $old |
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* @param string $new |
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* |
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* @throws InvalidArgumentException |
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*/ |
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public static function registerCustomView(string $old, string $new): void |
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{ |
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if (Str::contains($old, self::NAMESPACE_SEPARATOR) && Str::contains($new, self::NAMESPACE_SEPARATOR)) { |
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self::$replacements[$old] = $new; |
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} else { |
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throw new InvalidArgumentException(); |
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} |
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} |
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/** |
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* Find the file for a view. |
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* |
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* @param string $view_name |
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* |
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* @return string |
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* @throws Exception |
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*/ |
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public function getFilenameForView(string $view_name): string |
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{ |
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// If we request "::view", then use it explicityly. Don't allow replacements. |
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$explicit = Str::startsWith($view_name, self::NAMESPACE_SEPARATOR); |
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if (!Str::contains($view_name, self::NAMESPACE_SEPARATOR)) { |
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$view_name = self::NAMESPACE_SEPARATOR . $view_name; |
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} |
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// Apply replacements / customisations |
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while (!$explicit && array_key_exists($view_name, self::$replacements)) { |
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$view_name = self::$replacements[$view_name]; |
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} |
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[$namespace, $view_name] = explode(self::NAMESPACE_SEPARATOR, $view_name, 2); |
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if ((self::$namespaces[$namespace] ?? null) === null) { |
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throw new RuntimeException('Namespace "' . e($namespace) . '" not found.'); |
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} |
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$view_file = self::$namespaces[$namespace] . $view_name . self::TEMPLATE_EXTENSION; |
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if (!is_file($view_file)) { |
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throw new RuntimeException('View file not found: ' . e($view_file)); |
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} |
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return $view_file; |
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} |
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/** |
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* Cerate and render a view in a single operation. |
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* |
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* @param string $name |
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* @param mixed[] $data |
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* |
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* @return string |
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*/ |
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public static function make($name, $data = []): string |
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{ |
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$view = new static($name, $data); |
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DebugBar::addView($name, $data); |
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return $view->render(); |
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} |
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} |
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