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ApiSerializer.php
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ApiSerializer.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\Extend;
use Flarum\Api\Serializer\AbstractSerializer;
use Flarum\Extension\Extension;
use Flarum\Foundation\ContainerUtil;
use Illuminate\Contracts\Container\Container;
class ApiSerializer implements ExtenderInterface
{
private $serializerClass;
private $attribute = [];
private $attributes = [];
private $relationships = [];
/**
* @param string $serializerClass The ::class attribute of the serializer you are modifying.
* This serializer should extend from \Flarum\Api\Serializer\AbstractSerializer.
*/
public function __construct(string $serializerClass)
{
$this->serializerClass = $serializerClass;
}
/**
* Add a single attribute to this serializer.
*
* @param string $name: The name of the attribute.
* @param callable|string $callback
*
* The callback can be a closure or an invokable class, and should accept:
* - $serializer: An instance of this serializer.
* - $model: An instance of the model being serialized.
* - $attributes: An array of existing attributes.
*
* The callable should return:
* - The value of the attribute.
*
* @return self
*/
public function attribute(string $name, $callback): self
{
$this->attribute[$name] = $callback;
return $this;
}
/**
* Add to or modify the attributes array of this serializer.
*
* @param callable|string $callback
*
* The callback can be a closure or an invokable class, and should accept:
* - $serializer: An instance of this serializer.
* - $model: An instance of the model being serialized.
* - $attributes: An array of existing attributes.
*
* The callable should return:
* - An array of additional attributes to merge with the existing array.
* Or a modified $attributes array.
*
* @return self
*/
public function attributes($callback): self
{
$this->attributes[] = $callback;
return $this;
}
/**
* Establish a simple hasOne relationship from this serializer to another serializer.
* This represents a one-to-one relationship.
*
* @param string $name: The name of the relation. Has to be unique from other relation names.
* The relation has to exist in the model handled by this serializer.
* @param string $serializerClass: The ::class attribute the serializer that handles this relation.
* This serializer should extend from \Flarum\Api\Serializer\AbstractSerializer.
* @return self
*/
public function hasOne(string $name, string $serializerClass): self
{
return $this->relationship($name, function (AbstractSerializer $serializer, $model) use ($serializerClass, $name) {
return $serializer->hasOne($model, $serializerClass, $name);
});
}
/**
* Establish a simple hasMany relationship from this serializer to another serializer.
* This represents a one-to-many relationship.
*
* @param string $name: The name of the relation. Has to be unique from other relation names.
* The relation has to exist in the model handled by this serializer.
* @param string $serializerClass: The ::class attribute the serializer that handles this relation.
* This serializer should extend from \Flarum\Api\Serializer\AbstractSerializer.
* @return self
*/
public function hasMany(string $name, string $serializerClass): self
{
return $this->relationship($name, function (AbstractSerializer $serializer, $model) use ($serializerClass, $name) {
return $serializer->hasMany($model, $serializerClass, $name);
});
}
/**
* Add a relationship from this serializer to another serializer.
*
* @param string $name: The name of the relation. Has to be unique from other relation names.
* The relation has to exist in the model handled by this serializer.
* @param callable|string $callback
*
* The callable can be a closure or an invokable class, and should accept:
* - $serializer: An instance of this serializer.
* - $model: An instance of the model being serialized.
*
* The callable should return:
* - $relationship: An instance of \Tobscure\JsonApi\Relationship.
*
* @return self
*/
public function relationship(string $name, $callback): self
{
$this->relationships[$this->serializerClass][$name] = $callback;
return $this;
}
public function extend(Container $container, Extension $extension = null)
{
if (! empty($this->attribute)) {
$this->attributes[] = function ($serializer, $model, $attributes) use ($container) {
foreach ($this->attribute as $attributeName => $callback) {
$callback = ContainerUtil::wrapCallback($callback, $container);
$attributes[$attributeName] = $callback($serializer, $model, $attributes);
}
return $attributes;
};
}
foreach ($this->attributes as $callback) {
$callback = ContainerUtil::wrapCallback($callback, $container);
AbstractSerializer::addAttributeMutator($this->serializerClass, $callback);
}
foreach ($this->relationships as $serializerClass => $relationships) {
foreach ($relationships as $relation => $callback) {
$callback = ContainerUtil::wrapCallback($callback, $container);
AbstractSerializer::setRelationship($serializerClass, $relation, $callback);
}
}
}
}