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<?php
namespace BookStack\Theming;
use BookStack\Exceptions\ThemeException;
use Illuminate\View\FileViewFinder;
class ThemeViews
{
/**
* @var array<string, array<string, int>>
*/
protected array $beforeViews = [];
/**
* @var array<string, array<string, int>>
*/
protected array $afterViews = [];
public function __construct(
protected FileViewFinder $finder
) {
}
/**
* Register any extra paths for where we may expect views to be located
* with the FileViewFinder, to make custom views available for use.
* @param ThemeModule[] $modules
*/
public function registerViewPathsForTheme(array $modules): void
{
foreach ($modules as $module) {
$moduleViewsPath = $module->path('views');
if (file_exists($moduleViewsPath) && is_dir($moduleViewsPath)) {
$this->finder->prependLocation($moduleViewsPath);
}
}
$this->finder->prependLocation(theme_path());
}
/**
* Provide the response for a blade template view include.
*/
public function handleViewInclude(string $viewPath, array $data = [], array $mergeData = []): string
{
if (!$this->hasRegisteredViews()) {
return view()->make($viewPath, $data, $mergeData)->render();
}
if (str_contains('book-tree', $viewPath)) {
dd($viewPath, $data);
}
$viewsContent = [
...$this->renderViewSets($this->beforeViews[$viewPath] ?? [], $data, $mergeData),
view()->make($viewPath, $data, $mergeData)->render(),
...$this->renderViewSets($this->afterViews[$viewPath] ?? [], $data, $mergeData),
];
return implode("\n", $viewsContent);
}
/**
* Register a custom view to be rendered before the given target view is included in the template system.
*/
public function renderBefore(string $targetView, string $localView, int $priority = 50): void
{
$this->registerAdjacentView($this->beforeViews, $targetView, $localView, $priority);
}
/**
* Register a custom view to be rendered after the given target view is included in the template system.
*/
public function renderAfter(string $targetView, string $localView, int $priority = 50): void
{
$this->registerAdjacentView($this->afterViews, $targetView, $localView, $priority);
}
public function hasRegisteredViews(): bool
{
return !empty($this->beforeViews) || !empty($this->afterViews);
}
protected function registerAdjacentView(array &$location, string $targetView, string $localView, int $priority = 50): void
{
try {
$viewPath = $this->finder->find($localView);
} catch (\InvalidArgumentException $exception) {
throw new ThemeException("Expected registered view file with name \"{$localView}\" could not be found.");
}
if (!isset($location[$targetView])) {
$location[$targetView] = [];
}
$location[$targetView][$viewPath] = $priority;
}
/**
* @param array<string, int> $viewSet
* @return string[]
*/
protected function renderViewSets(array $viewSet, array $data, array $mergeData): array
{
$paths = array_keys($viewSet);
usort($paths, function (string $a, string $b) use ($viewSet) {
return $viewSet[$a] <=> $viewSet[$b];
});
return array_map(function (string $viewPath) use ($data, $mergeData) {
return view()->file($viewPath, $data, $mergeData)->render();
}, $paths);
}
}