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<?php declare(strict_types=1); |
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namespace OpenStack\Common\Resource; |
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/** |
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* Represents a top-level abstraction of a remote API resource. Usually a resource represents a discrete |
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* entity such as a Server, Container, Load Balancer. Apart from a representation of state, a resource can |
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* also execute RESTFul operations on itself (updating, deleting, listing) or on other models. |
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* |
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* @package OpenStack\Common\Resource |
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*/ |
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class Alias |
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{ |
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/** |
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* An array of aliases that will be checked when the resource is being populated. For example, |
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* |
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* 'CLASS_NAME' => ['FOO_BAR' => 'fooBar'] |
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* |
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* will extract FOO_BAR from the response, and save it as 'fooBar' in the resource. |
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* |
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* 'CLASS_NAME' => ['FOO_BAR' => ['fooBar', \DateTimeImmutable::class]] |
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* |
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* will extract FOO_BAR from the response, and save it as 'fooBar' with type \DateTimeImmutable in the resource. |
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* |
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* 'CLASS_NAME' => ['FOO_BAR' => ['fooBar', \DateTimeImmutable::class, true]] |
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* |
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* do the same as above plus indicates that target property is a list |
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* |
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* @var array |
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*/ |
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protected $aliases = []; |
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/** |
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* @param ResourceInterface $object |
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* @param string $key |
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* @param mixed $value |
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* |
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* @return void |
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*/ |
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public function setObjectProperty(ResourceInterface $object, $key, $value) |
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{ |
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$alias = (array)($this->aliases[get_class($object)][$key] ?? $key); |
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if (property_exists($object, $property = $alias[0])) { |
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$class = $alias[1] ?? false; |
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$isList = $alias[2] ?? false; |
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$object->{$property} = $this->normalizePropertyValue($object, $value, $class, $isList); |
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} |
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} |
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/** |
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* Adds a new alias for class property |
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* |
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* @param string $resourceClass |
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* @param string $alias |
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* @param string $property |
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* @param string|null $class |
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* @param bool $isList |
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* |
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* @return $this |
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*/ |
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public function add($resourceClass, $alias, $property, $class = null, $isList = false) |
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{ |
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$resourceClass = $this->ensureClassName($resourceClass); |
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// make sure that target class exists |
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$class = (($class && class_exists($class)) ? $class : false); |
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$this->aliases[$resourceClass][$alias] = [$property, $class, $isList]; |
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return $this; |
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} |
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/** |
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* Removes an alias(es) for a class |
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* |
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* @param string $resourceClass |
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* @param string|null $alias |
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* |
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* @return $this |
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*/ |
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public function remove($resourceClass, $alias = null) |
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{ |
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$resourceClass = $this->ensureClassName($resourceClass); |
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if (isset($this->aliases[$resourceClass])) { |
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if ($alias === null) { |
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unset($this->aliases[$resourceClass]); |
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} elseif (isset($this->aliases[$resourceClass][$alias])) { |
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unset($this->aliases[$resourceClass][$alias]); |
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} |
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} |
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return $this; |
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} |
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/** |
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* Returns |
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* |
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* @param string $resourceClass |
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* |
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* @return array |
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*/ |
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public function getAliases($resourceClass) |
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{ |
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$resourceClass = $this->ensureClassName($resourceClass); |
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$aliases = $this->aliases[$resourceClass] ?? []; |
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return array_map('array_shift', $aliases); |
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} |
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/** |
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* Checks whether aliases added for a class or not |
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* |
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* @param string $resourceClass |
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* |
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* @return bool |
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*/ |
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public function hasAliases($resourceClass) |
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{ |
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return isset($this->aliases[$resourceClass]); |
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} |
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/** |
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* @param ResourceInterface $object |
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* @param mixed $value |
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* @param string|false $class |
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* @param bool $isList |
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* |
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* @return mixed |
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*/ |
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protected function normalizePropertyValue(ResourceInterface $object, $value, $class, $isList) |
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{ |
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if ($value === null || !$class) { |
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return $value; |
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} elseif ($isList && is_array($value)) { |
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$array = []; |
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foreach ($value as $subVal) { |
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$array[] = $object->model($class, $subVal); |
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} |
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return $array; |
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} elseif ($class === \DateTimeImmutable::class) { |
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return new \DateTimeImmutable($value); |
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} |
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return $object->model($class, $value); |
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} |
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/** |
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* @param mixed $object |
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* |
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* @return string |
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*/ |
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private function ensureClassName($object) |
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{ |
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return is_object($object) ? get_class($object) : (string)$object; |
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} |
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} |
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In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
string
values, the empty string''
is a special case, in particular the following results might be unexpected: