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<?php |
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/** |
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* Class for representing an entity. |
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* |
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* @package WordPoints\Entities |
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* @since 2.1.0 |
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*/ |
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/** |
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* Represents an entity. |
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* |
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* An entity can be just about anything, like a Post, a User, a Comment, a Site, etc. |
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* This class defines a single common interface for interacting with entities. This |
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* is useful when some code needs to be able to work with several different kinds of |
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* entities and can't know beforehand what they are. |
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* |
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* Each different type of entity is defined by a child of this class. |
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* |
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* @since 2.1.0 |
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*/ |
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abstract class WordPoints_Entity |
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extends WordPoints_Entityish |
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implements WordPoints_Entity_ParentI { |
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// |
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// Protected Methods. |
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// |
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/** |
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* The context in which this type of entity exists. |
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* |
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* Most entities exist only in the context of a specific site on the network (in |
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* multisite—when not on multisite they are just global to the install). Entities |
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* with other contexts need to specify that by overriding this property. |
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* |
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* You must either define this or override get_context() in your subclass. |
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* |
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* @since 2.1.0 |
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* |
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* @see wordpoints_entities_get_current_context_id() |
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* |
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* @var string |
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*/ |
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protected $context = 'site'; |
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/** |
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* The field the entity is identified by. |
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* |
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* You must either define this or override get_id_field() in your subclass. |
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* |
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* @since 2.1.0 |
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* |
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* @var string |
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*/ |
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protected $id_field; |
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/** |
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* Whether the IDs of the entities are integers. |
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* |
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* If true, the ID will always be casted to an integer before it is returned. |
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* |
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* @since 2.4.0 |
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* |
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* @var bool |
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*/ |
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protected $id_is_int = false; |
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/** |
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* The field the entity can be identified by humans by. |
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* |
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* You must either define this or override get_entity_human_id(). |
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* |
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* @since 2.1.0 |
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* |
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* @var string |
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*/ |
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protected $human_id_field; |
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/** |
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* A function to call with an entity ID to retrieve that entity. |
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* |
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* You must either define this or override get_entity(). |
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* |
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* @since 2.1.0 |
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* |
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* @var callable |
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*/ |
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protected $getter; |
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/** |
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* The entity itself. |
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* |
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* This will probably always be an array or object. |
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* |
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* @since 2.1.0 |
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* |
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* @var mixed |
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*/ |
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protected $the_entity; |
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/** |
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* The GUID of the context in which the entity exists. |
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* |
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* @since 2.1.0 |
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* |
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* @see wordpoints_entities_get_current_context_id() |
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* |
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* @var array|false|null |
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*/ |
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protected $the_context; |
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/** |
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* Get an entity by its ID. |
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* |
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* @since 2.1.0 |
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* |
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* @param mixed $id The unique ID of the entity. |
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* |
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* @return mixed The entity, or false if not found. |
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*/ |
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protected function get_entity( $id ) { |
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$entity = call_user_func( $this->getter, $id ); |
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if ( ! $this->is_entity( $entity ) ) { |
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return false; |
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} |
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return $entity; |
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} |
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/** |
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* Checks if a value is an entity of this type. |
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* |
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* @since 2.1.0 |
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* |
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* @param mixed $entity A value that might be an entity. |
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* |
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* @return bool Whether the passed value is an entity. |
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*/ |
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protected function is_entity( $entity ) { |
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if ( ! is_object( $entity ) && ! is_array( $entity ) ) { |
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return false; |
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} |
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return (bool) $this->get_entity_id( $entity ); |
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} |
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/** |
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* Get an entity from a (possibly) foreign context. |
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* |
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* Normally we only get entities from the current context. This method will grab |
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* an entity from a particular context, regardless of whether it is the current |
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* context or not. |
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* |
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* @since 2.2.0 |
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* |
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* @param int|string $id The unique ID of the entity. |
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* @param array $context The context to get the entity from. |
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* |
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* @return mixed The entity, or false if not found. |
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*/ |
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protected function get_entity_from_context( $id, $context ) { |
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/** @var WordPoints_Entity_Contexts $contexts */ |
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$contexts = wordpoints_entities()->get_sub_app( 'contexts' ); |
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if ( ! $contexts->switch_to( $context ) ) { |
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return false; |
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} |
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$entity = $this->get_entity( $id ); |
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$contexts->switch_back(); |
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return $entity; |
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} |
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/** |
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* Checks if a value is a GUID for an entity of this type. |
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* |
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* @since 2.2.0 |
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* |
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* @param array $guid A value that might be an entity GUID. |
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* |
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* @return bool Whether the passed value is a GUID for an entity of this type. |
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*/ |
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protected function is_guid( $guid ) { |
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if ( ! is_array( $guid ) ) { |
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return false; |
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} |
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$context = $this->get_context(); |
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return ( |
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isset( $guid[ $this->get_slug() ] ) |
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&& ( '' === $context || isset( $guid[ $context ] ) ) |
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); |
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} |
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/** |
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* Splits an entity GUID into the ID and context. |
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* |
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* @since 2.2.0 |
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* |
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* @param array $guid An entity GUID. |
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* |
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* @return array { |
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* @type string|int $id The entity ID. |
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* @type array $context The entity context. |
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* } |
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*/ |
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protected function split_guid( $guid ) { |
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$slug = $this->get_slug(); |
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$id = $guid[ $slug ]; |
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$context = $guid; |
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unset( $context[ $slug ] ); |
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return array( 'id' => $id, 'context' => $context ); |
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} |
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/** |
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* Gets the value of one of an entity's attributes. |
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* |
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* @since 2.1.0 |
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* |
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* @param mixed $entity An entity of this type. |
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* @param string $attr The attribute whose value to get. |
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* |
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* @return mixed The value of the attribute of the entity. |
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*/ |
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protected function get_attr_value( $entity, $attr ) { |
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if ( is_array( $entity ) ) { |
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if ( isset( $entity[ $attr ] ) ) { |
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return $entity[ $attr ]; |
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} |
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} else { |
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if ( isset( $entity->{$attr} ) ) { |
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return $entity->{$attr}; |
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} |
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} |
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return null; |
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} |
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/** |
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* Get the ID from an entity. |
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* |
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* @since 2.1.0 |
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* |
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* @param mixed $entity The entity (usually object or array). |
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* |
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* @return mixed The ID of the entity. |
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*/ |
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protected function get_entity_id( $entity ) { |
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$id = $this->get_attr_value( $entity, $this->get_id_field() ); |
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if ( $this->id_is_int && null !== $id ) { |
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$id = wordpoints_posint( $id ); |
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} |
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return $id; |
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} |
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/** |
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* Get the human ID from an entity. |
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* |
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* The human ID is a human readable identifier for the entity, and may be |
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* different than the regular ID. It is also possible that the human ID will not |
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* always be unique. |
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* |
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* @since 2.1.0 |
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* |
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* @param mixed $entity The entity (usually object or array). |
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* |
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* @return mixed The human ID of the entity. |
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*/ |
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protected function get_entity_human_id( $entity ) { |
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return $this->get_attr_value( $entity, $this->human_id_field ); |
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} |
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// |
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// Public Methods. |
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// |
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/** |
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* Get the slug of the context in which this type of entity exists. |
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* |
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* @since 2.1.0 |
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* |
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* @see wordpoints_entities_get_current_context_id() |
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* |
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* @return string The slug of the context in which this type of entity exists. |
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*/ |
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public function get_context() { |
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return $this->context; |
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} |
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/** |
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* Get the attribute that holds the entity's unique ID. |
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* |
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* @since 2.1.0 |
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* |
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* @return string The attribute that holds the entity's unique ID. |
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*/ |
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public function get_id_field() { |
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return $this->id_field; |
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} |
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/** |
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* Get the human ID for an entity. |
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* |
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* @since 2.1.0 |
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* |
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* @see self::get_entity_human_id() |
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* |
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* @param mixed $id The ID of an entity. |
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* |
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* @return string|int|float|false The human identifier for the entity, or false. |
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*/ |
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public function get_human_id( $id ) { |
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$entity = $this->get_entity( $id ); |
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if ( ! $entity ) { |
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return false; |
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} |
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return $this->get_entity_human_id( $entity ); |
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} |
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/** |
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* Check if an entity exists, by ID. |
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* |
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* @since 2.1.0 |
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* |
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* @param mixed $id The entity ID. |
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* |
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* @return bool Whether or not an entity with that ID exists. |
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*/ |
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public function exists( $id ) { |
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return (bool) $this->get_entity( $id ); |
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} |
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/** |
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* Get a child of this entity. |
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* |
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* Entities can have children, which currently fall into two types: attributes |
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* and relationships. |
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* |
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* @since 2.1.0 |
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* |
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* @param string $child_slug The slug of the child. |
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* |
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* @return WordPoints_Entityish|false The child's object, or false if not found. |
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*/ |
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public function get_child( $child_slug ) { |
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$children = wordpoints_entities()->get_sub_app( 'children' ); |
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$child = $children->get( $this->slug, $child_slug ); |
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if ( |
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isset( $this->the_value ) |
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&& $child instanceof WordPoints_Entity_ChildI |
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) { |
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$child->set_the_value_from_entity( $this ); |
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} |
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return $child; |
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} |
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/** |
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* Set the value of this entity. |
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* |
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* This class can represent a type of entity generically (e.g., Post), or a |
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* specific entity of that type (the Post with ID 3). This function allows you to |
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* make this object instance represent a specific entity. |
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* |
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* If the value passed is not an entity, and is not a valid ID, it will be |
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* ignored and the value will not be set. |
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* |
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* @since 2.1.0 |
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* @since 2.2.0 The $value parameter now accepts an entity GUID. |
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* |
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|
* @param mixed $value An entity or entity ID or GUID. |
394
|
|
|
* |
395
|
|
|
* @return bool Whether the value was set. |
396
|
|
|
*/ |
397
|
|
|
public function set_the_value( $value ) { |
398
|
|
|
|
399
|
|
|
$this->the_value = null; |
400
|
|
|
$this->the_entity = null; |
401
|
|
|
$this->the_context = null; |
402
|
|
|
|
403
|
|
|
if ( $this->is_entity( $value ) ) { |
404
|
|
|
|
405
|
|
|
$entity = $value; |
406
|
|
|
$value = $this->get_entity_id( $value ); |
407
|
|
|
|
408
|
|
|
} elseif ( $this->is_guid( $value ) ) { |
409
|
|
|
|
410
|
|
|
$guid = $this->split_guid( $value ); |
411
|
|
|
$context = $guid['context']; |
412
|
|
|
$value = $guid['id']; |
413
|
|
|
|
414
|
|
|
$entity = $this->get_entity_from_context( $guid['id'], $context ); |
415
|
|
|
|
416
|
|
|
} else { |
417
|
|
|
|
418
|
|
|
$entity = $this->get_entity( $value ); |
419
|
|
|
} |
420
|
|
|
|
421
|
|
|
if ( ! $entity ) { |
422
|
|
|
return false; |
423
|
|
|
} |
424
|
|
|
|
425
|
|
|
if ( ! isset( $context ) ) { |
426
|
|
|
$context = wordpoints_entities_get_current_context_id( |
427
|
|
|
$this->get_context() |
428
|
|
|
); |
429
|
|
|
} |
430
|
|
|
|
431
|
|
|
$this->the_value = $value; |
432
|
|
|
$this->the_entity = $entity; |
433
|
|
|
$this->the_context = $context; |
434
|
|
|
|
435
|
|
|
return true; |
436
|
|
|
} |
437
|
|
|
|
438
|
|
|
/** |
439
|
|
|
* Get the value of one of this entity's attributes. |
440
|
|
|
* |
441
|
|
|
* @since 2.1.0 |
442
|
|
|
* |
443
|
|
|
* @param string $attr The attribute to get the value of. |
444
|
|
|
* |
445
|
|
|
* @return mixed The value of the attribute. |
446
|
|
|
*/ |
447
|
|
|
public function get_the_attr_value( $attr ) { |
448
|
|
|
return $this->get_attr_value( $this->the_entity, $attr ); |
449
|
|
|
} |
450
|
|
|
|
451
|
|
|
/** |
452
|
|
|
* Get the ID of the entity. |
453
|
|
|
* |
454
|
|
|
* @since 2.1.0 |
455
|
|
|
* |
456
|
|
|
* @return mixed The ID of the entity. |
457
|
|
|
*/ |
458
|
|
|
public function get_the_id() { |
459
|
|
|
|
460
|
|
|
$the_id = $this->get_the_value(); |
461
|
|
|
|
462
|
|
|
if ( $this->id_is_int && null !== $the_id ) { |
463
|
|
|
$the_id = wordpoints_posint( $the_id ); |
464
|
|
|
} |
465
|
|
|
|
466
|
|
|
return $the_id; |
467
|
|
|
} |
468
|
|
|
|
469
|
|
|
/** |
470
|
|
|
* Get the human ID of the entity. |
471
|
|
|
* |
472
|
|
|
* @since 2.1.0 |
473
|
|
|
* |
474
|
|
|
* @see self::get_entity_human_id() |
475
|
|
|
* |
476
|
|
|
* @return string|int|float|null The human identifier for the entity, or null. |
477
|
|
|
*/ |
478
|
|
|
public function get_the_human_id() { |
479
|
|
|
return $this->get_entity_human_id( $this->the_entity ); |
480
|
|
|
} |
481
|
|
|
|
482
|
|
|
/** |
483
|
|
|
* Get the context in which the current entity exists. |
484
|
|
|
* |
485
|
|
|
* @since 2.1.0 |
486
|
|
|
* |
487
|
|
|
* @see wordpoints_entities_get_current_context_id() |
488
|
|
|
* |
489
|
|
|
* @return array|null The context values indexed by context slugs. |
490
|
|
|
*/ |
491
|
|
|
public function get_the_context() { |
492
|
|
|
return $this->the_context; |
493
|
|
|
} |
494
|
|
|
|
495
|
|
|
/** |
496
|
|
|
* Get the Globally Unique ID of the entity. |
497
|
|
|
* |
498
|
|
|
* The GUID is an array of values that includes the GUID of the entity context |
499
|
|
|
* in addition to the ID of the entity itself. |
500
|
|
|
* |
501
|
|
|
* The entity ID is first in the array, then the context IDs in ascending |
502
|
|
|
* hierarchical order. |
503
|
|
|
* |
504
|
|
|
* @since 2.1.0 |
505
|
|
|
* |
506
|
|
|
* @return array|false|null The GUID, false if it could not be determined, or |
507
|
|
|
* null if the value isn't set. |
508
|
|
|
*/ |
509
|
|
|
public function get_the_guid() { |
510
|
|
|
|
511
|
|
|
$guid = $this->get_the_context(); |
512
|
|
|
|
513
|
|
|
if ( ! is_array( $guid ) ) { |
514
|
|
|
return $guid; |
515
|
|
|
} |
516
|
|
|
|
517
|
|
|
$guid = array( $this->slug => $this->get_the_id() ) + $guid; |
518
|
|
|
|
519
|
|
|
return $guid; |
520
|
|
|
} |
521
|
|
|
} |
522
|
|
|
|
523
|
|
|
// EOF |
524
|
|
|
|
This check looks for function or method calls that always return null and whose return value is assigned to a variable.
The method
getObject()
can return nothing but null, so it makes no sense to assign that value to a variable.The reason is most likely that a function or method is imcomplete or has been reduced for debug purposes.