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LessCompiler.php
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LessCompiler.php
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<?php
/*
* This file is part of Flarum.
*
* For detailed copyright and license information, please view the
* LICENSE file that was distributed with this source code.
*/
namespace Flarum\Frontend\Compiler;
use Flarum\Frontend\Compiler\Source\FileSource;
use Illuminate\Support\Collection;
use Illuminate\Support\Str;
use Less_Parser;
/**
* @internal
*/
class LessCompiler extends RevisionCompiler
{
/**
* @var string
*/
protected $cacheDir;
/**
* @var array
*/
protected $importDirs = [];
/**
* @var array
*/
protected $customFunctions = [];
/**
* @var Collection
*/
protected $lessImportOverrides;
/**
* @var Collection
*/
protected $fileSourceOverrides;
public function getCacheDir(): string
{
return $this->cacheDir;
}
public function setCacheDir(string $cacheDir)
{
$this->cacheDir = $cacheDir;
}
public function getImportDirs(): array
{
return $this->importDirs;
}
public function setImportDirs(array $importDirs)
{
$this->importDirs = $importDirs;
}
public function setLessImportOverrides(array $lessImportOverrides)
{
$this->lessImportOverrides = new Collection($lessImportOverrides);
}
public function setFileSourceOverrides(array $fileSourceOverrides)
{
$this->fileSourceOverrides = new Collection($fileSourceOverrides);
}
public function setCustomFunctions(array $customFunctions)
{
$this->customFunctions = $customFunctions;
}
/**
* @throws \Less_Exception_Parser
*/
protected function compile(array $sources): string
{
if (! count($sources)) {
return '';
}
ini_set('xdebug.max_nesting_level', 200);
$parser = new Less_Parser([
'compress' => true,
'cache_dir' => $this->cacheDir,
'import_dirs' => $this->importDirs,
'import_callback' => $this->lessImportOverrides ? $this->overrideImports($sources) : null,
]);
if ($this->fileSourceOverrides) {
$sources = $this->overrideSources($sources);
}
foreach ($sources as $source) {
if ($source instanceof FileSource) {
$parser->parseFile($source->getPath());
} else {
$parser->parse($source->getContent());
}
}
foreach ($this->customFunctions as $name => $callback) {
$parser->registerFunction($name, $callback);
}
return $parser->getCss();
}
protected function overrideSources(array $sources): array
{
foreach ($sources as $source) {
if ($source instanceof FileSource) {
$basename = basename($source->getPath());
$override = $this->fileSourceOverrides
->where('file', $basename)
->firstWhere('extensionId', $source->getExtensionId());
if ($override) {
$source->setPath($override['newFilePath']);
}
}
}
return $sources;
}
protected function overrideImports(array $sources): callable
{
$baseSources = (new Collection($sources))->filter(function ($source) {
return $source instanceof Source\FileSource;
})->map(function (FileSource $source) {
$path = realpath($source->getPath());
$path = Str::beforeLast($path, '/less/');
return [
'path' => $path,
'extensionId' => $source->getExtensionId(),
];
})->unique('path');
return function ($evald) use ($baseSources): ?array {
$relativeImportPath = Str::of($evald->PathAndUri()[0])->split('/\/less\//');
$extensionId = $baseSources->where('path', $relativeImportPath->first())->pluck('extensionId')->first();
$overrideImport = $this->lessImportOverrides
->where('file', $relativeImportPath->last())
->firstWhere('extensionId', $extensionId);
if (! $overrideImport) {
return null;
}
return [$overrideImport['newFilePath'], $evald->PathAndUri()[1]];
};
}
protected function getCacheDifferentiator(): ?array
{
return [
'import_dirs' => $this->importDirs
];
}
}