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<?php
namespace Illuminate\View\Compilers;
use Illuminate\Support\Arr;
use Illuminate\Support\Str;
use InvalidArgumentException;
class BladeCompiler extends Compiler implements CompilerInterface
{
use Concerns\CompilesAuthorizations,
Concerns\CompilesComments,
Concerns\CompilesComponents,
Concerns\CompilesConditionals,
Concerns\CompilesEchos,
Concerns\CompilesHelpers,
Concerns\CompilesIncludes,
Concerns\CompilesInjections,
Concerns\CompilesJson,
Concerns\CompilesLayouts,
Concerns\CompilesLoops,
Concerns\CompilesRawPhp,
Concerns\CompilesStacks,
Concerns\CompilesTranslations;
/**
* All of the registered extensions.
*
* @var array
*/
protected $extensions = [];
/**
* All custom "directive" handlers.
*
* @var array
*/
protected $customDirectives = [];
/**
* All custom "condition" handlers.
*
* @var array
*/
protected $conditions = [];
/**
* The file currently being compiled.
*
* @var string
*/
protected $path;
/**
* All of the available compiler functions.
*
* @var array
*/
protected $compilers = [
'Comments',
'Extensions',
'Statements',
'Echos',
];
/**
* Array of opening and closing tags for raw echos.
*
* @var array
*/
protected $rawTags = ['{!!', '!!}'];
/**
* Array of opening and closing tags for regular echos.
*
* @var array
*/
protected $contentTags = ['{{', '}}'];
/**
* Array of opening and closing tags for escaped echos.
*
* @var array
*/
protected $escapedTags = ['{{{', '}}}'];
/**
* The "regular" / legacy echo string format.
*
* @var string
*/
protected $echoFormat = 'e(%s)';
/**
* Array of footer lines to be added to template.
*
* @var array
*/
protected $footer = [];
/**
* Array to temporary store the raw blocks found in the template.
*
* @var array
*/
protected $rawBlocks = [];
/**
* Compile the view at the given path.
*
* @param string $path
* @return void
*/
public function compile($path = null)
{
if ($path) {
$this->setPath($path);
}
if (! is_null($this->cachePath)) {
$contents = $this->compileString($this->files->get($this->getPath()));
$this->files->put($this->getCompiledPath($this->getPath()), $contents);
}
}
/**
* Get the path currently being compiled.
*
* @return string
*/
public function getPath()
{
return $this->path;
}
/**
* Set the path currently being compiled.
*
* @param string $path
* @return void
*/
public function setPath($path)
{
$this->path = $path;
}
/**
* Compile the given Blade template contents.
*
* @param string $value
* @return string
*/
public function compileString($value)
{
if (strpos($value, '@verbatim') !== false) {
$value = $this->storeVerbatimBlocks($value);
}
$this->footer = [];
if (strpos($value, '@php') !== false) {
$value = $this->storePhpBlocks($value);
}
$result = '';
// Here we will loop through all of the tokens returned by the Zend lexer and
// parse each one into the corresponding valid PHP. We will then have this
// template as the correctly rendered PHP that can be rendered natively.
foreach (token_get_all($value) as $token) {
$result .= is_array($token) ? $this->parseToken($token) : $token;
}
if (! empty($this->rawBlocks)) {
$result = $this->restoreRawContent($result);
}
// If there are any footer lines that need to get added to a template we will
// add them here at the end of the template. This gets used mainly for the
// template inheritance via the extends keyword that should be appended.
if (count($this->footer) > 0) {
$result = $this->addFooters($result);
}
return $result;
}
/**
* Store the verbatim blocks and replace them with a temporary placeholder.
*
* @param string $value
* @return string
*/
protected function storeVerbatimBlocks($value)
{
return preg_replace_callback('/(?<!@)@verbatim(.*?)@endverbatim/s', function ($matches) {
return $this->storeRawBlock($matches[1]);
}, $value);
}
/**
* Store the PHP blocks and replace them with a temporary placeholder.
*
* @param string $value
* @return string
*/
protected function storePhpBlocks($value)
{
return preg_replace_callback('/(?<!@)@php(.*?)@endphp/s', function ($matches) {
return $this->storeRawBlock("<?php{$matches[1]}?>");
}, $value);
}
/**
* Store a raw block and return a unique raw placeholder.
*
* @param string $value
* @return string
*/
protected function storeRawBlock($value)
{
return $this->getRawPlaceholder(
array_push($this->rawBlocks, $value) - 1
);
}
/**
* Replace the raw placeholders with the original code stored in the raw blocks.
*
* @param string $result
* @return string
*/
protected function restoreRawContent($result)
{
$result = preg_replace_callback('/'.$this->getRawPlaceholder('(\d+)').'/', function ($matches) {
return $this->rawBlocks[$matches[1]];
}, $result);
$this->rawBlocks = [];
return $result;
}
/**
* Get a placeholder to temporary mark the position of raw blocks.
*
* @param int|string $replace
* @return string
*/
protected function getRawPlaceholder($replace)
{
return str_replace('#', $replace, '@__raw_block_#__@');
}
/**
* Add the stored footers onto the given content.
*
* @param string $result
* @return string
*/
protected function addFooters($result)
{
return ltrim($result, PHP_EOL)
.PHP_EOL.implode(PHP_EOL, array_reverse($this->footer));
}
/**
* Parse the tokens from the template.
*
* @param array $token
* @return string
*/
protected function parseToken($token)
{
[$id, $content] = $token;
if ($id == T_INLINE_HTML) {
foreach ($this->compilers as $type) {
$content = $this->{"compile{$type}"}($content);
}
}
return $content;
}
/**
* Execute the user defined extensions.
*
* @param string $value
* @return string
*/
protected function compileExtensions($value)
{
foreach ($this->extensions as $compiler) {
$value = call_user_func($compiler, $value, $this);
}
return $value;
}
/**
* Compile Blade statements that start with "@".
*
* @param string $value
* @return string
*/
protected function compileStatements($value)
{
return preg_replace_callback(
'/\B@(@?\w+(?:::\w+)?)([ \t]*)(\( ( (?>[^()]+) | (?3) )* \))?/x', function ($match) {
return $this->compileStatement($match);
}, $value
);
}
/**
* Compile a single Blade @ statement.
*
* @param array $match
* @return string
*/
protected function compileStatement($match)
{
if (Str::contains($match[1], '@')) {
$match[0] = isset($match[3]) ? $match[1].$match[3] : $match[1];
} elseif (isset($this->customDirectives[$match[1]])) {
$match[0] = $this->callCustomDirective($match[1], Arr::get($match, 3));
} elseif (method_exists($this, $method = 'compile'.ucfirst($match[1]))) {
$match[0] = $this->$method(Arr::get($match, 3));
}
return isset($match[3]) ? $match[0] : $match[0].$match[2];
}
/**
* Call the given directive with the given value.
*
* @param string $name
* @param string|null $value
* @return string
*/
protected function callCustomDirective($name, $value)
{
if (Str::startsWith($value, '(') && Str::endsWith($value, ')')) {
$value = Str::substr($value, 1, -1);
}
return call_user_func($this->customDirectives[$name], trim($value));
}
/**
* Strip the parentheses from the given expression.
*
* @param string $expression
* @return string
*/
public function stripParentheses($expression)
{
if (Str::startsWith($expression, '(')) {
$expression = substr($expression, 1, -1);
}
return $expression;
}
/**
* Register a custom Blade compiler.
*
* @param callable $compiler
* @return void
*/
public function extend(callable $compiler)
{
$this->extensions[] = $compiler;
}
/**
* Get the extensions used by the compiler.
*
* @return array
*/
public function getExtensions()
{
return $this->extensions;
}
/**
* Register an "if" statement directive.
*
* @param string $name
* @param callable $callback
* @return void
*/
public function if($name, callable $callback)
{
$this->conditions[$name] = $callback;
$this->directive($name, function ($expression) use ($name) {
return $expression !== ''
? "<?php if (\Illuminate\Support\Facades\Blade::check('{$name}', {$expression})): ?>"
: "<?php if (\Illuminate\Support\Facades\Blade::check('{$name}')): ?>";
});
$this->directive('else'.$name, function ($expression) use ($name) {
return $expression !== ''
? "<?php elseif (\Illuminate\Support\Facades\Blade::check('{$name}', {$expression})): ?>"
: "<?php elseif (\Illuminate\Support\Facades\Blade::check('{$name}')): ?>";
});
$this->directive('end'.$name, function () {
return '<?php endif; ?>';
});
}
/**
* Check the result of a condition.
*
* @param string $name
* @param array $parameters
* @return bool
*/
public function check($name, ...$parameters)
{
return call_user_func($this->conditions[$name], ...$parameters);
}
/**
* Register a component alias directive.
*
* @param string $path
* @param string $alias
* @return void
*/
public function component($path, $alias = null)
{
$alias = $alias ?: Arr::last(explode('.', $path));
$this->directive($alias, function ($expression) use ($path) {
return $expression
? "<?php \$__env->startComponent('{$path}', {$expression}); ?>"
: "<?php \$__env->startComponent('{$path}'); ?>";
});
$this->directive('end'.$alias, function ($expression) {
return '<?php echo $__env->renderComponent(); ?>';
});
}
/**
* Register an include alias directive.
*
* @param string $path
* @param string $alias
* @return void
*/
public function include($path, $alias = null)
{
$alias = $alias ?: Arr::last(explode('.', $path));
$this->directive($alias, function ($expression) use ($path) {
$expression = $this->stripParentheses($expression) ?: '[]';
return "<?php echo \$__env->make('{$path}', {$expression}, \Illuminate\Support\Arr::except(get_defined_vars(), array('__data', '__path')))->render(); ?>";
});
}
/**
* Register a handler for custom directives.
*
* @param string $name
* @param callable $handler
* @return void
*/
public function directive($name, callable $handler)
{
if (! preg_match('/^\w+(?:::\w+)?$/x', $name)) {
throw new InvalidArgumentException("The directive name [{$name}] is not valid. Directive names must only contain alphanumeric characters and underscores.");
}
$this->customDirectives[$name] = $handler;
}
/**
* Get the list of custom directives.
*
* @return array
*/
public function getCustomDirectives()
{
return $this->customDirectives;
}
/**
* Set the echo format to be used by the compiler.
*
* @param string $format
* @return void
*/
public function setEchoFormat($format)
{
$this->echoFormat = $format;
}
/**
* Set the "echo" format to double encode entities.
*
* @return void
*/
public function withDoubleEncoding()
{
$this->setEchoFormat('e(%s, true)');
}
/**
* Set the "echo" format to not double encode entities.
*
* @return void
*/
public function withoutDoubleEncoding()
{
$this->setEchoFormat('e(%s, false)');
}
}