Viewing file:  Component.php (7.59 KB) -rw-r--r--
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<?php
namespace Illuminate\View;
use Closure;
use Illuminate\Container\Container;
use Illuminate\Contracts\Support\Htmlable;
use Illuminate\Contracts\View\View as ViewContract;
use Illuminate\Support\Str;
use ReflectionClass;
use ReflectionMethod;
use ReflectionProperty;
abstract class Component
{
/**
* The cache of public property names, keyed by class.
*
* @var array
*/
protected static $propertyCache = [];
/**
* The cache of public method names, keyed by class.
*
* @var array
*/
protected static $methodCache = [];
/**
* The properties / methods that should not be exposed to the component.
*
* @var array
*/
protected $except = [];
/**
* The component alias name.
*
* @var string
*/
public $componentName;
/**
* The component attributes.
*
* @var \Illuminate\View\ComponentAttributeBag
*/
public $attributes;
/**
* Get the view / view contents that represent the component.
*
* @return \Illuminate\Contracts\View\View|\Illuminate\Contracts\Support\Htmlable|\Closure|string
*/
abstract public function render();
/**
* Resolve the Blade view or view file that should be used when rendering the component.
*
* @return \Illuminate\Contracts\View\View|\Illuminate\Contracts\Support\Htmlable|\Closure|string
*/
public function resolveView()
{
$view = $this->render();
if ($view instanceof ViewContract) {
return $view;
}
if ($view instanceof Htmlable) {
return $view;
}
$resolver = function ($view) {
$factory = Container::getInstance()->make('view');
return strlen($view) <= PHP_MAXPATHLEN && $factory->exists($view)
? $view
: $this->createBladeViewFromString($factory, $view);
};
return $view instanceof Closure ? function (array $data = []) use ($view, $resolver) {
return $resolver($view($data));
}
: $resolver($view);
}
/**
* Create a Blade view with the raw component string content.
*
* @param \Illuminate\Contracts\View\Factory $factory
* @param string $contents
* @return string
*/
protected function createBladeViewFromString($factory, $contents)
{
$factory->addNamespace(
'__components',
$directory = Container::getInstance()['config']->get('view.compiled')
);
if (! is_file($viewFile = $directory.'/'.sha1($contents).'.blade.php')) {
if (! is_dir($directory)) {
mkdir($directory, 0755, true);
}
file_put_contents($viewFile, $contents);
}
return '__components::'.basename($viewFile, '.blade.php');
}
/**
* Get the data that should be supplied to the view.
*
* @author Freek Van der Herten
* @author Brent Roose
*
* @return array
*/
public function data()
{
$this->attributes = $this->attributes ?: $this->newAttributeBag();
return array_merge($this->extractPublicProperties(), $this->extractPublicMethods());
}
/**
* Extract the public properties for the component.
*
* @return array
*/
protected function extractPublicProperties()
{
$class = get_class($this);
if (! isset(static::$propertyCache[$class])) {
$reflection = new ReflectionClass($this);
static::$propertyCache[$class] = collect($reflection->getProperties(ReflectionProperty::IS_PUBLIC))
->reject(function (ReflectionProperty $property) {
return $property->isStatic();
})
->reject(function (ReflectionProperty $property) {
return $this->shouldIgnore($property->getName());
})
->map(function (ReflectionProperty $property) {
return $property->getName();
})->all();
}
$values = [];
foreach (static::$propertyCache[$class] as $property) {
$values[$property] = $this->{$property};
}
return $values;
}
/**
* Extract the public methods for the component.
*
* @return array
*/
protected function extractPublicMethods()
{
$class = get_class($this);
if (! isset(static::$methodCache[$class])) {
$reflection = new ReflectionClass($this);
static::$methodCache[$class] = collect($reflection->getMethods(ReflectionMethod::IS_PUBLIC))
->reject(function (ReflectionMethod $method) {
return $this->shouldIgnore($method->getName());
})
->map(function (ReflectionMethod $method) {
return $method->getName();
});
}
$values = [];
foreach (static::$methodCache[$class] as $method) {
$values[$method] = $this->createVariableFromMethod(new ReflectionMethod($this, $method));
}
return $values;
}
/**
* Create a callable variable from the given method.
*
* @param \ReflectionMethod $method
* @return mixed
*/
protected function createVariableFromMethod(ReflectionMethod $method)
{
return $method->getNumberOfParameters() === 0
? $this->createInvokableVariable($method->getName())
: Closure::fromCallable([$this, $method->getName()]);
}
/**
* Create an invokable, toStringable variable for the given component method.
*
* @param string $method
* @return \Illuminate\View\InvokableComponentVariable
*/
protected function createInvokableVariable(string $method)
{
return new InvokableComponentVariable(function () use ($method) {
return $this->{$method}();
});
}
/**
* Determine if the given property / method should be ignored.
*
* @param string $name
* @return bool
*/
protected function shouldIgnore($name)
{
return Str::startsWith($name, '__') ||
in_array($name, $this->ignoredMethods());
}
/**
* Get the methods that should be ignored.
*
* @return array
*/
protected function ignoredMethods()
{
return array_merge([
'data',
'render',
'resolveView',
'shouldRender',
'view',
'withName',
'withAttributes',
], $this->except);
}
/**
* Set the component alias name.
*
* @param string $name
* @return $this
*/
public function withName($name)
{
$this->componentName = $name;
return $this;
}
/**
* Set the extra attributes that the component should make available.
*
* @param array $attributes
* @return $this
*/
public function withAttributes(array $attributes)
{
$this->attributes = $this->attributes ?: $this->newAttributeBag();
$this->attributes->setAttributes($attributes);
return $this;
}
/**
* Get a new attribute bag instance.
*
* @param array $attributes
* @return \Illuminate\View\ComponentAttributeBag
*/
protected function newAttributeBag(array $attributes = [])
{
return new ComponentAttributeBag($attributes);
}
/**
* Determine if the component should be rendered.
*
* @return bool
*/
public function shouldRender()
{
return true;
}
}
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