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Current File : /var/www/html/webtrees/app/View.php
<?php
/**
* webtrees: online genealogy
* Copyright (C) 2023 webtrees development team
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
declare(strict_types=1);
namespace Fisharebest\Webtrees;
use Exception;
use InvalidArgumentException;
use LogicException;
use RuntimeException;
use Throwable;
use function array_key_exists;
use function explode;
use function extract;
use function implode;
use function is_file;
use function ob_end_clean;
use function ob_get_level;
use function ob_start;
use function sha1;
use function str_contains;
use function str_ends_with;
use function strlen;
use function strncmp;
use const EXTR_OVERWRITE;
/**
* Simple view/template class.
*/
class View
{
public const NAMESPACE_SEPARATOR = '::';
private const TEMPLATE_EXTENSION = '.phtml';
private string $name;
/** @var array<mixed> */
private array $data;
/**
* @var array<string> Where do the templates live, for each namespace.
*/
private static array $namespaces = [
'' => Webtrees::ROOT_DIR . 'resources/views/',
];
/**
* @var array<string> Modules can replace core views with their own.
*/
private static array $replacements = [];
/**
* @var string Implementation of Blade "stacks".
*/
private static string $stack;
/**
* @var array<array<string>> Implementation of Blade "stacks".
*/
private static array $stacks = [];
/**
* Create a view from a template name and optional data.
*
* @param string $name
* @param array<mixed> $data
*/
public function __construct(string $name, array $data = [])
{
$this->name = $name;
$this->data = $data;
}
/**
* Implementation of Blade "stacks".
*
* @see https://laravel.com/docs/5.5/blade#stacks
*
* @param string $stack
*
* @return void
*/
public static function push(string $stack): void
{
self::$stack = $stack;
ob_start();
}
/**
* Implementation of Blade "stacks".
*
* @return void
*/
public static function endpush(): void
{
$content = ob_get_clean();
if ($content === false) {
throw new LogicException('found endpush(), but did not find push()');
}
self::$stacks[self::$stack][] = $content;
}
/**
* Variant of push that will only add one copy of each item.
*
* @param string $stack
*
* @return void
*/
public static function pushunique(string $stack): void
{
self::$stack = $stack;
ob_start();
}
/**
* Variant of push that will only add one copy of each item.
*
* @return void
*/
public static function endpushunique(): void
{
$content = ob_get_clean();
if ($content === false) {
throw new LogicException('found endpushunique(), but did not find pushunique()');
}
self::$stacks[self::$stack][sha1($content)] = $content;
}
/**
* Implementation of Blade "stacks".
*
* @param string $stack
*
* @return string
*/
public static function stack(string $stack): string
{
$content = implode('', self::$stacks[$stack] ?? []);
self::$stacks[$stack] = [];
return $content;
}
/**
* Render a view.
*
* @return string
* @throws Throwable
*/
public function render(): string
{
extract($this->data, EXTR_OVERWRITE);
try {
ob_start();
// Do not use require, so we can catch errors for missing files
include $this->getFilenameForView($this->name);
return (string) ob_get_clean();
} catch (Throwable $ex) {
while (ob_get_level() > 0) {
ob_end_clean();
}
throw $ex;
}
}
/**
* @param string $namespace
* @param string $path
*
* @throws InvalidArgumentException
*/
public static function registerNamespace(string $namespace, string $path): void
{
if ($namespace === '') {
throw new InvalidArgumentException('Cannot register the default namespace');
}
if (!str_ends_with($path, '/')) {
throw new InvalidArgumentException('Paths must end with a directory separator');
}
self::$namespaces[$namespace] = $path;
}
/**
* @param string $old
* @param string $new
*
* @throws InvalidArgumentException
*/
public static function registerCustomView(string $old, string $new): void
{
if (str_contains($old, self::NAMESPACE_SEPARATOR) && str_contains($new, self::NAMESPACE_SEPARATOR)) {
self::$replacements[$old] = $new;
} else {
throw new InvalidArgumentException();
}
}
/**
* Find the file for a view.
*
* @param string $view_name
*
* @return string
* @throws Exception
*/
public function getFilenameForView(string $view_name): string
{
// If we request "::view", then use it explicitly. Don't allow replacements.
// NOTE: cannot use str_starts_with() as it wasn't available in 2.0.6, and is called by the upgrade wizard.
$explicit = strncmp($view_name, self::NAMESPACE_SEPARATOR, strlen(self::NAMESPACE_SEPARATOR)) === 0;
if (!str_contains($view_name, self::NAMESPACE_SEPARATOR)) {
$view_name = self::NAMESPACE_SEPARATOR . $view_name;
}
// Apply replacements / customizations
while (!$explicit && array_key_exists($view_name, self::$replacements)) {
$view_name = self::$replacements[$view_name];
}
[$namespace, $view_name] = explode(self::NAMESPACE_SEPARATOR, $view_name, 2);
if ((self::$namespaces[$namespace] ?? null) === null) {
throw new RuntimeException('Namespace "' . e($namespace) . '" not found.');
}
$view_file = self::$namespaces[$namespace] . $view_name . self::TEMPLATE_EXTENSION;
if (!is_file($view_file)) {
throw new RuntimeException('View file not found: ' . e($view_file));
}
return $view_file;
}
/**
* Create and render a view in a single operation.
*
* @param string $name
* @param array<mixed> $data
*
* @return string
*/
public static function make(string $name, array $data = []): string
{
$view = new self($name, $data);
return $view->render();
}
}
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