1274 lines
40 KiB
PHP
1274 lines
40 KiB
PHP
<?php
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/**
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* @file
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* Provides wrappers allowing easy usage of the entity metadata.
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*/
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/**
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* A common base class for all wrappers.
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*/
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abstract class EntityMetadataWrapper {
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protected $type;
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protected $data;
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protected $info;
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protected $cache = array();
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/**
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* Construct a new wrapper object.
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*
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* @param $type
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* The type of the passed data.
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* @param $data
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* Optional. The data to wrap.
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* @param $info
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* Optional. Used internally to pass info about properties down the tree.
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*/
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public function __construct($type, $data = NULL, $info = array()) {
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$this->type = $type;
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$this->info = $info + array(
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'langcode' => NULL,
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);
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$this->info['type'] = $type;
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if (isset($data)) {
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$this->set($data);
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}
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}
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/**
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* Gets info about the wrapped data.
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*
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* @return Array
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* Keys set are all keys as specified for a property in hook_entity_info()
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* as well as possible the following keys:
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* - name: If this wraps a property, the name of the property.
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* - parent: The parent wrapper, if any.
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* - langcode: The language code, if this data is language specific.
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*/
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public function info() {
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return $this->info;
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}
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/**
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* Gets the (entity)type of the wrapped data.
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*/
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public function type() {
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return $this->type;
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}
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/**
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* Returns the wrapped data. If no options are given the data is returned as
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* described in the info.
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*
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* @param $options
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* (optional) A keyed array of options:
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* - sanitize: A boolean flag indicating that textual properties should be
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* sanitized for display to a web browser. Defaults to FALSE.
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* - decode: If set to TRUE and some textual data is already sanitized, it
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* strips HTML tags and decodes HTML entities. Defaults to FALSE.
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*
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* @return
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* The value of the wrapped data. If the data property is not set, NULL
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* is returned.
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*
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* @throws EntityMetadataWrapperException
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* In case there are no data values available to the wrapper, an exception
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* is thrown. E.g. if the value for an entity property is to be retrieved
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* and there is no entity available, the exception is thrown. However, if
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* an entity is available but the property is not set, NULL is returned.
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*/
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public function value(array $options = array()) {
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if (!$this->dataAvailable() && isset($this->info['parent'])) {
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throw new EntityMetadataWrapperException('Missing data values.');
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}
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if (!isset($this->data) && isset($this->info['name'])) {
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$this->data = $this->info['parent']->getPropertyValue($this->info['name'], $this->info);
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}
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return $this->data;
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}
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/**
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* Returns the raw, unprocessed data. Most times this is the same as returned
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* by value(), however for already processed and sanitized textual data, this
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* will return the unprocessed data in contrast to value().
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*/
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public function raw() {
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if (!$this->dataAvailable()) {
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throw new EntityMetadataWrapperException('Missing data values.');
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}
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if (isset($this->info['name']) && isset($this->info['parent'])) {
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return $this->info['parent']->getPropertyRaw($this->info['name'], $this->info);
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}
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// Else return the usual value, which should be raw in this case.
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return $this->value();
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}
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/**
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* Returns whether data is available to work with.
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*
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* @return
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* If we operate without any data FALSE, else TRUE.
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*/
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protected function dataAvailable() {
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return isset($this->data) || (isset($this->info['parent']) && $this->info['parent']->dataAvailable());
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}
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/**
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* Set a new data value.
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*/
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public function set($value) {
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if (!$this->validate($value)) {
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throw new EntityMetadataWrapperException(t('Invalid data value given. Be sure it matches the required data type and format. Value at !location: !value.', array(
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// An exception's message is output through check_plain().
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'!value' => is_array($value) || is_object($value) ? var_export($value, TRUE) : $value,
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'!location' => $this->debugIdentifierLocation(),
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)));
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}
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$this->clear();
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$this->data = $value;
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$this->updateParent($value);
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return $this;
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}
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/**
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* Updates the parent data structure of a data property with the latest data value.
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*/
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protected function updateParent($value) {
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if (isset($this->info['parent'])) {
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$this->info['parent']->setProperty($this->info['name'], $value);
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}
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}
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/**
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* Returns whether $value is a valid value to set.
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*/
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public function validate($value) {
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if (isset($value) && !entity_property_verify_data_type($value, $this->type)) {
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return FALSE;
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}
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// Only proceed with further checks if this is not a list item. If this is
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// a list item, the checks are performed on the list property level.
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if (isset($this->info['parent']) && $this->info['parent'] instanceof EntityListWrapper) {
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return TRUE;
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}
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if (!isset($value) && !empty($this->info['required'])) {
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// Do not allow NULL values if the property is required.
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return FALSE;
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}
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return !isset($this->info['validation callback']) || call_user_func($this->info['validation callback'], $value, $this->info);
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}
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public function __toString() {
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return isset($this->info) ? 'Property ' . $this->info['name'] : $this->type;
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}
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/**
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* Clears the data value and the wrapper cache.
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*/
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protected function clear() {
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$this->data = NULL;
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foreach ($this->cache as $wrapper) {
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$wrapper->clear();
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}
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}
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/**
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* Returns the options list specifying possible values for the property, if
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* defined.
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*
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* @param $op
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* (optional) One of 'edit' or 'view'. In case the list of possible values
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* a user could set for a property differs from the list of values a
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* property could have, $op determines which options should be returned.
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* Defaults to 'edit'.
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* E.g. all possible roles a user could have include the anonymous and the
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* authenticated user roles, while those roles cannot be added to a user
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* account. So their options would be included for 'view', but for 'edit'
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* not.
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*
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* @return
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* An array as used by hook_options_list() or FALSE.
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*/
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public function optionsList($op = 'edit') {
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if (isset($this->info['options list']) && is_callable($this->info['options list'])) {
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$name = isset($this->info['name']) ? $this->info['name'] : NULL;
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return call_user_func($this->info['options list'], $name, $this->info, $op);
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}
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return FALSE;
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}
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/**
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* Returns the label for the currently set property value if there is one
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* available, i.e. if an options list has been specified.
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*/
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public function label() {
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if ($options = $this->optionsList('view')) {
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$options = entity_property_options_flatten($options);
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$value = $this->value();
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if (is_scalar($value) && isset($options[$value])) {
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return $options[$value];
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}
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}
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}
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/**
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* Determines whether the given user has access to view or edit this property.
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* Apart from relying on access metadata of properties, this takes into
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* account information about entity level access, if available:
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* - Referenced entities can only be viewed, when the user also has
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* permission to view the entity.
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* - A property may be only edited, if the user has permission to update the
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* entity containing the property.
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*
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* @param $op
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* The operation being performed. One of 'view' or 'edit.
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* @param $account
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* The user to check for. Leave it to NULL to check for the global user.
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* @return boolean
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* Whether access to entity property is allowed for the given operation.
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* However if we wrap no data, it returns whether access is allowed to the
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* property of all entities of this type.
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* If there is no access information for this property, TRUE is returned.
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*/
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public function access($op, $account = NULL) {
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return !empty($this->info['parent']) ? $this->info['parent']->propertyAccess($this->info['name'], $op, $account) : TRUE;
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}
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/**
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* Returns a string to use to identify this wrapper in error messages.
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*
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* @return
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* A string that identifies this wrapper and its chain of ancestors, of the
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* form 'grandparentidentifier->parentidentifier->identifier'.
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*/
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public function debugIdentifierLocation() {
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$debug = $this->info['name'];
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if (isset($this->info['parent'])) {
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$debug = $this->info['parent']->debugIdentifierLocation() . '->' . $debug;
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}
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return $debug;
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}
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/**
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* Prepare for serializiation.
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*/
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public function __sleep() {
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$vars = get_object_vars($this);
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unset($vars['cache']);
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return drupal_map_assoc(array_keys($vars));
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}
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}
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/**
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* Wraps a single value.
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*/
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class EntityValueWrapper extends EntityMetadataWrapper {
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/**
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* Overrides EntityMetadataWrapper#value().
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* Sanitizes or decode textual data if necessary.
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*/
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public function value(array $options = array()) {
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$data = parent::value();
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if ($this->type == 'text' && isset($data)) {
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$info = $this->info + array('sanitized' => FALSE, 'sanitize' => 'check_plain');
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$options += array('sanitize' => FALSE, 'decode' => FALSE);
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if ($options['sanitize'] && !$info['sanitized']) {
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return call_user_func($info['sanitize'], $data);
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}
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elseif ($options['decode'] && $info['sanitized']) {
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return decode_entities(strip_tags($data));
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}
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}
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return $data;
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}
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}
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/**
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* Provides a general wrapper for any data structure. For this to work the
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* metadata has to be passed during construction.
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*/
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class EntityStructureWrapper extends EntityMetadataWrapper implements IteratorAggregate {
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protected $propertyInfo = array(), $propertyInfoAltered = FALSE;
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protected $langcode = LANGUAGE_NONE;
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protected $propertyInfoDefaults = array(
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'type' => 'text',
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'getter callback' => 'entity_property_verbatim_get',
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'clear' => array(),
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);
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/**
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* Construct a new EntityStructureWrapper object.
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*
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* @param $type
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* The type of the passed data.
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* @param $data
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* Optional. The data to wrap.
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* @param $info
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* Used to for specifying metadata about the data and internally to pass
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* info about properties down the tree. For specifying metadata known keys
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* are:
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* - property info: An array of info about the properties of the wrapped
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* data structure. It has to contain an array of property info in the same
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* structure as used by hook_entity_property_info().
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*/
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public function __construct($type, $data = NULL, $info = array()) {
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parent::__construct($type, $data, $info);
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$this->info += array('property defaults' => array());
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$info += array('property info' => array());
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$this->propertyInfo['properties'] = $info['property info'];
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}
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/**
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* May be used to lazy-load additional info about the data, depending on the
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* concrete passed data.
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*/
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protected function spotInfo() {
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// Apply the callback if set, such that the caller may alter the info.
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if (!empty($this->info['property info alter']) && !$this->propertyInfoAltered) {
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$this->propertyInfo = call_user_func($this->info['property info alter'], $this, $this->propertyInfo);
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$this->propertyInfoAltered = TRUE;
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}
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}
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/**
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* Gets the info about the given property.
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*
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* @param $name
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* The name of the property. If not given, info about all properties will
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* be returned.
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* @throws EntityMetadataWrapperException
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* If there is no such property.
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* @return
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* An array of info about the property.
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*/
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public function getPropertyInfo($name = NULL) {
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$this->spotInfo();
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if (!isset($name)) {
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return $this->propertyInfo['properties'];
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}
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if (!isset($this->propertyInfo['properties'][$name])) {
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throw new EntityMetadataWrapperException('Unknown data property ' . check_plain($name) . '.');
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}
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return $this->propertyInfo['properties'][$name] + $this->info['property defaults'] + $this->propertyInfoDefaults;
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}
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/**
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* Returns a reference on the property info.
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*
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* If possible, use the property info alter callback for spotting metadata.
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* The reference may be used to alter the property info for any remaining
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* cases, e.g. if additional metadata has been asserted.
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*/
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public function &refPropertyInfo() {
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return $this->propertyInfo;
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}
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/**
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* Sets a new language to use for retrieving properties.
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*
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* @param $langcode
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* The language code of the language to set.
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* @return EntityWrapper
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*/
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public function language($langcode = LANGUAGE_NONE) {
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if ($langcode != $this->langcode) {
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$this->langcode = $langcode;
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$this->cache = array();
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}
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return $this;
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}
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/**
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* Gets the language used for retrieving properties.
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*
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* @return String
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* The language object of the language or NULL for the default language.
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*
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* @see EntityStructureWrapper::language()
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*/
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public function getPropertyLanguage() {
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if ($this->langcode != LANGUAGE_NONE && $list = language_list()) {
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if (isset($list[$this->langcode])) {
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return $list[$this->langcode];
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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 wrapper for a property.
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*
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* @return
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* An instance of EntityMetadataWrapper.
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*/
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public function get($name) {
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// Look it up in the cache if possible.
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if (!array_key_exists($name, $this->cache)) {
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if ($info = $this->getPropertyInfo($name)) {
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$info += array('parent' => $this, 'name' => $name, 'langcode' => $this->langcode, 'property defaults' => array());
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$info['property defaults'] += $this->info['property defaults'];
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$this->cache[$name] = entity_metadata_wrapper($info['type'], NULL, $info);
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}
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else {
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throw new EntityMetadataWrapperException('There is no property ' . check_plain($name) . " for this entity.");
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}
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}
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return $this->cache[$name];
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}
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/**
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* Magic method: Get a wrapper for a property.
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*/
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public function __get($name) {
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if (strpos($name, 'krumo') === 0) {
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// #914934 Ugly workaround to allow krumo to write its recursion property.
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// This is necessary to make dpm() work without throwing exceptions.
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return NULL;
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}
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$get = $this->get($name);
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return $get;
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}
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/**
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* Magic method: Set a property.
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*/
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public function __set($name, $value) {
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if (strpos($name, 'krumo') === 0) {
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// #914934 Ugly workaround to allow krumo to write its recursion property.
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// This is necessary to make dpm() work without throwing exceptions.
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$this->$name = $value;
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}
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else {
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$this->get($name)->set($value);
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}
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}
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/**
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* Gets the value of a property.
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*/
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protected function getPropertyValue($name, &$info) {
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$options = array('language' => $this->getPropertyLanguage(), 'absolute' => TRUE);
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$data = $this->value();
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if (!isset($data)) {
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throw new EntityMetadataWrapperException('Unable to get the data property ' . check_plain($name) . ' as the parent data structure is not set.');
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}
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return $info['getter callback']($data, $options, $name, $this->type, $info);
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}
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/**
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* Gets the raw value of a property.
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*/
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protected function getPropertyRaw($name, &$info) {
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if (!empty($info['raw getter callback'])) {
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$options = array('language' => $this->getPropertyLanguage(), 'absolute' => TRUE);
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$data = $this->value();
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if (!isset($data)) {
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throw new EntityMetadataWrapperException('Unable to get the data property ' . check_plain($name) . ' as the parent data structure is not set.');
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}
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return $info['raw getter callback']($data, $options, $name, $this->type, $info);
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}
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return $this->getPropertyValue($name, $info);
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}
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/**
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* Sets a property.
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*/
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protected function setProperty($name, $value) {
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$info = $this->getPropertyInfo($name);
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if (!empty($info['setter callback'])) {
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$data = $this->value();
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// In case the data structure is not set, support simple auto-creation
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// for arrays. Else an exception is thrown.
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if (!isset($data)) {
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if (!empty($this->info['auto creation']) && !($this instanceof EntityDrupalWrapper)) {
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$data = $this->info['auto creation']($name, $this->info);
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}
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else {
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throw new EntityMetadataWrapperException('Unable to set the data property ' . check_plain($name) . ' as the parent data structure is not set.');
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}
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}
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// Invoke the setter callback for updating our data.
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$info['setter callback']($data, $name, $value, $this->langcode, $this->type, $info);
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// If the setter has not thrown any exceptions, proceed and apply the
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// update to the current and any parent wrappers as necessary.
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$data = $this->info['type'] == 'entity' ? $this : $data;
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$this->set($data);
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// Clear the cache of properties dependent on this value.
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foreach ($info['clear'] as $name) {
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if (isset($this->cache[$name])) {
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$this->cache[$name]->clear();
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}
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}
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}
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else {
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throw new EntityMetadataWrapperException('Entity property ' . check_plain($name) . " doesn't support writing.");
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}
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}
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protected function propertyAccess($name, $op, $account = NULL) {
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$info = $this->getPropertyInfo($name);
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// If a property should be edited and this is part of an entity, make sure
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// the user has update access for this entity.
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if ($op == 'edit') {
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$entity = $this;
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|
while (!($entity instanceof EntityDrupalWrapper) && isset($entity->info['parent'])) {
|
|
$entity = $entity->info['parent'];
|
|
}
|
|
if ($entity instanceof EntityDrupalWrapper && $entity->entityAccess('update', $account) === FALSE) {
|
|
return FALSE;
|
|
}
|
|
}
|
|
if (!empty($info['access callback'])) {
|
|
$data = $this->dataAvailable() ? $this->value() : NULL;
|
|
return call_user_func($info['access callback'], $op, $name, $data, $account, $this->type);
|
|
}
|
|
elseif ($op == 'edit' && isset($info['setter permission'])) {
|
|
return user_access($info['setter permission'], $account);
|
|
}
|
|
// If access is unknown, we return TRUE.
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* Magic method: Can be used to check if a property is known.
|
|
*/
|
|
public function __isset($name) {
|
|
$this->spotInfo();
|
|
return isset($this->propertyInfo['properties'][$name]);
|
|
}
|
|
|
|
public function getIterator() {
|
|
$this->spotInfo();
|
|
return new EntityMetadataWrapperIterator($this, array_keys($this->propertyInfo['properties']));
|
|
}
|
|
|
|
/**
|
|
* Returns the identifier of the data structure. If there is none, NULL is
|
|
* returned.
|
|
*/
|
|
public function getIdentifier() {
|
|
return isset($this->id) && $this->dataAvailable() ? $this->id->value() : NULL;
|
|
}
|
|
|
|
/**
|
|
* Prepare for serializiation.
|
|
*/
|
|
public function __sleep() {
|
|
$vars = parent::__sleep();
|
|
unset($vars['propertyInfoDefaults']);
|
|
return $vars;
|
|
}
|
|
|
|
public function clear() {
|
|
$this->propertyInfoAltered = FALSE;
|
|
parent::clear();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Provides a wrapper for entities registrered in hook_entity_info().
|
|
*
|
|
* The wrapper eases applying getter and setter callbacks of entity properties
|
|
* specified in hook_entity_property_info().
|
|
*/
|
|
class EntityDrupalWrapper extends EntityStructureWrapper {
|
|
|
|
/**
|
|
* Contains the entity id.
|
|
*/
|
|
protected $id = FALSE;
|
|
protected $bundle;
|
|
protected $entityInfo;
|
|
|
|
/**
|
|
* Construct a new EntityDrupalWrapper object.
|
|
*
|
|
* @param $type
|
|
* The type of the passed data.
|
|
* @param $data
|
|
* Optional. The entity to wrap or its identifier.
|
|
* @param $info
|
|
* Optional. Used internally to pass info about properties down the tree.
|
|
*/
|
|
public function __construct($type, $data = NULL, $info = array()) {
|
|
parent::__construct($type, $data, $info);
|
|
$this->setUp();
|
|
}
|
|
|
|
protected function setUp() {
|
|
$this->propertyInfo = entity_get_property_info($this->type) + array('properties' => array());
|
|
$info = $this->info + array('property info' => array(), 'bundle' => NULL);
|
|
$this->propertyInfo['properties'] += $info['property info'];
|
|
$this->bundle = $info['bundle'];
|
|
$this->entityInfo = entity_get_info($this->type);
|
|
if (isset($this->bundle)) {
|
|
$this->spotBundleInfo(FALSE);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets the entity internally accepting both the entity id and object.
|
|
*/
|
|
protected function setEntity($data) {
|
|
// For entities we allow getter callbacks to return FALSE, which we
|
|
// interpret like NULL values as unset properties.
|
|
if (isset($data) && $data !== FALSE && !is_object($data)) {
|
|
$this->id = $data;
|
|
$this->data = FALSE;
|
|
}
|
|
elseif (is_object($data) && $data instanceof EntityDrupalWrapper) {
|
|
// We got a wrapped entity passed, so take over its values.
|
|
$this->id = $data->id;
|
|
$this->data = $data->data;
|
|
// For generic entity references, also update the entity type accordingly.
|
|
if ($this->info['type'] == 'entity') {
|
|
$this->type = $data->type;
|
|
}
|
|
}
|
|
elseif (is_object($data)) {
|
|
// We got the entity object passed.
|
|
$this->data = $data;
|
|
$id = entity_id($this->type, $data);
|
|
$this->id = isset($id) ? $id : FALSE;
|
|
}
|
|
else {
|
|
$this->id = FALSE;
|
|
$this->data = NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Used to lazy-load bundle info. So the wrapper can be loaded e.g. just
|
|
* for setting without the data being loaded.
|
|
*/
|
|
protected function spotInfo() {
|
|
if (!$this->propertyInfoAltered) {
|
|
if ($this->info['type'] == 'entity' && $this->dataAvailable() && $this->value()) {
|
|
// Add in entity-type specific details.
|
|
$this->setUp();
|
|
}
|
|
$this->spotBundleInfo(TRUE);
|
|
parent::spotInfo();
|
|
$this->propertyInfoAltered = TRUE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Tries to determine the bundle and adds in the according property info.
|
|
*
|
|
* @param $load
|
|
* Whether the entity should be loaded to spot the info if necessary.
|
|
*/
|
|
protected function spotBundleInfo($load = TRUE) {
|
|
// Like entity_extract_ids() assume the entity type if no key is given.
|
|
if (empty($this->entityInfo['entity keys']['bundle']) && $this->type != 'entity') {
|
|
$this->bundle = $this->type;
|
|
}
|
|
// Detect the bundle if not set yet and add in properties from the bundle.
|
|
elseif (!$this->bundle && $load && $this->dataAvailable()) {
|
|
try {
|
|
if ($entity = $this->value()) {
|
|
list($id, $vid, $bundle) = entity_extract_ids($this->type, $entity);
|
|
$this->bundle = $bundle;
|
|
}
|
|
}
|
|
catch (EntityMetadataWrapperException $e) {
|
|
// Loading data failed, so we cannot derive the used bundle.
|
|
}
|
|
}
|
|
|
|
if ($this->bundle && isset($this->propertyInfo['bundles'][$this->bundle])) {
|
|
$bundle_info = (array) $this->propertyInfo['bundles'][$this->bundle] + array('properties' => array());
|
|
// Allow bundles to re-define existing properties, such that the bundle
|
|
// can add in more bundle-specific details like the bundle of a referenced
|
|
// entity.
|
|
$this->propertyInfo['properties'] = $bundle_info['properties'] + $this->propertyInfo['properties'];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the identifier of the wrapped entity.
|
|
*
|
|
* @see entity_id()
|
|
*/
|
|
public function getIdentifier() {
|
|
return $this->dataAvailable() ? $this->value(array('identifier' => TRUE)) : NULL;
|
|
}
|
|
|
|
/**
|
|
* Returns the bundle of an entity, or FALSE if it has no bundles.
|
|
*/
|
|
public function getBundle() {
|
|
if ($this->dataAvailable()) {
|
|
$this->spotInfo();
|
|
return $this->bundle;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Overridden.
|
|
*
|
|
* @param $options
|
|
* An array of options. Known keys:
|
|
* - identifier: If set to TRUE, the entity identifier is returned.
|
|
*/
|
|
public function value(array $options = array()) {
|
|
// Try loading the data via the getter callback if there is none yet.
|
|
if (!isset($this->data)) {
|
|
$this->setEntity(parent::value());
|
|
}
|
|
if (!empty($options['identifier'])) {
|
|
return $this->id;
|
|
}
|
|
elseif (!$this->data && !empty($this->id)) {
|
|
// Lazy load the entity if necessary.
|
|
$return = entity_load($this->type, array($this->id));
|
|
// In case the entity cannot be loaded, we return NULL just as for empty
|
|
// properties.
|
|
$this->data = $return ? reset($return) : NULL;
|
|
}
|
|
return $this->data;
|
|
}
|
|
|
|
/**
|
|
* Returns the entity prepared for rendering.
|
|
*
|
|
* @see entity_view()
|
|
*/
|
|
public function view($view_mode = 'full', $langcode = NULL, $page = NULL) {
|
|
return entity_view($this->type(), array($this->value()), $view_mode, $langcode, $page);
|
|
}
|
|
|
|
/**
|
|
* Overridden to support setting the entity by either the object or the id.
|
|
*/
|
|
public function set($value) {
|
|
if (!$this->validate($value)) {
|
|
throw new EntityMetadataWrapperException(t('Invalid data value given. Be sure it matches the required data type and format. Value at !location: !value.', array(
|
|
// An exception's message is output through check_plain().
|
|
'!value' => is_array($value) || is_object($value) ? var_export($value, TRUE) : $value,
|
|
'!location' => $this->debugIdentifierLocation(),
|
|
)));
|
|
}
|
|
if ($this->info['type'] == 'entity' && $value === $this) {
|
|
// Nothing to do.
|
|
return $this;
|
|
}
|
|
$previous_id = $this->id;
|
|
$previous_type = $this->type;
|
|
// Set value, so we get the identifier and pass it to the normal setter.
|
|
$this->clear();
|
|
$this->setEntity($value);
|
|
// Generally, we have to update the parent only if the entity reference
|
|
// has changed. In case of a generic entity reference, we pass the entity
|
|
// wrapped. Else we just pass the id of the entity to the setter callback.
|
|
if ($this->info['type'] == 'entity' && ($previous_id != $this->id || $previous_type != $this->type)) {
|
|
// We need to clone the wrapper we pass through as value, so it does not
|
|
// get cleared when the current wrapper instance gets cleared.
|
|
$this->updateParent(clone $this);
|
|
}
|
|
// In case the entity has been unset, we cannot properly detect changes as
|
|
// the previous id defaults to FALSE for unloaded entities too. So in that
|
|
// case we just always update the parent.
|
|
elseif ($this->id === FALSE && !$this->data) {
|
|
$this->updateParent(NULL);
|
|
}
|
|
elseif ($previous_id !== $this->id) {
|
|
$this->updateParent($this->id);
|
|
}
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Overridden.
|
|
*/
|
|
public function clear() {
|
|
$this->id = NULL;
|
|
$this->bundle = isset($this->info['bundle']) ? $this->info['bundle'] : NULL;
|
|
if ($this->type != $this->info['type']) {
|
|
// Reset entity info / property info based upon the info provided during
|
|
// the creation of the wrapper.
|
|
$this->type = $this->info['type'];
|
|
$this->setUp();
|
|
}
|
|
parent::clear();
|
|
}
|
|
|
|
/**
|
|
* Overridden.
|
|
*/
|
|
public function type() {
|
|
// In case of a generic entity wrapper, load the data first to determine
|
|
// the type of the concrete entity.
|
|
if ($this->dataAvailable() && $this->info['type'] == 'entity') {
|
|
try {
|
|
$this->value(array('identifier' => TRUE));
|
|
}
|
|
catch (EntityMetadataWrapperException $e) {
|
|
// If loading data fails, we cannot determine the concrete entity type.
|
|
}
|
|
}
|
|
return $this->type;
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*
|
|
* Note that this method checks property access, but can be used for checking
|
|
* entity access *only* if the wrapper is not a property (i.e. has no parent
|
|
* wrapper).
|
|
* To be safe, better use EntityDrupalWrapper::entityAccess() for checking
|
|
* entity access.
|
|
*/
|
|
public function access($op, $account = NULL) {
|
|
if (!empty($this->info['parent'])) {
|
|
// If this is a property, make sure the user is able to view the
|
|
// currently referenced entity also.
|
|
if ($this->entityAccess('view', $account) === FALSE) {
|
|
return FALSE;
|
|
}
|
|
if (parent::access($op, $account) === FALSE) {
|
|
return FALSE;
|
|
}
|
|
// If access is unknown, we return TRUE.
|
|
return TRUE;
|
|
}
|
|
else {
|
|
// This is not a property, so fallback on entity access.
|
|
if ($op == 'edit') {
|
|
// If the operation is "edit" determine if its actually a "create" for
|
|
// new un-saved entities, or an "update" for existing ones.
|
|
return $this->entityAccess($this->getIdentifier() ? 'update' : 'create', $account);
|
|
}
|
|
return $this->entityAccess('view', $account);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Checks whether the operation $op is allowed on the entity.
|
|
*
|
|
* @see entity_access()
|
|
*/
|
|
public function entityAccess($op, $account = NULL) {
|
|
$entity = $this->dataAvailable() ? $this->value() : NULL;
|
|
// The value() method could return FALSE on entities such as user 0, so we
|
|
// need to use NULL instead to conform to the expectations of
|
|
// entity_access().
|
|
if ($entity === FALSE) {
|
|
$entity = NULL;
|
|
}
|
|
return entity_access($op, $this->type, $entity, $account);
|
|
}
|
|
|
|
/**
|
|
* Permanently save the wrapped entity.
|
|
*
|
|
* @throws EntityMetadataWrapperException
|
|
* If the entity type does not support saving.
|
|
*
|
|
* @return EntityDrupalWrapper
|
|
*/
|
|
public function save() {
|
|
if ($this->data) {
|
|
if (!entity_type_supports($this->type, 'save')) {
|
|
throw new EntityMetadataWrapperException("There is no information about how to save entities of type " . check_plain($this->type) . '.');
|
|
}
|
|
entity_save($this->type, $this->data);
|
|
// On insert, update the identifier afterwards.
|
|
if (!$this->id) {
|
|
list($this->id, , ) = entity_extract_ids($this->type, $this->data);
|
|
}
|
|
}
|
|
// If the entity hasn't been loaded yet, don't bother saving it.
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Permanently delete the wrapped entity.
|
|
*
|
|
* @return EntityDrupalWrapper
|
|
*/
|
|
public function delete() {
|
|
if ($this->dataAvailable() && $this->value()) {
|
|
$return = entity_delete($this->type, $this->id);
|
|
if ($return === FALSE) {
|
|
throw new EntityMetadataWrapperException("There is no information about how to delete entities of type " . check_plain($this->type) . '.');
|
|
}
|
|
}
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Gets the info about the wrapped entity.
|
|
*/
|
|
public function entityInfo() {
|
|
return $this->entityInfo;
|
|
}
|
|
|
|
/**
|
|
* Returns the name of the key used by the entity for given entity key.
|
|
*
|
|
* @param $name
|
|
* One of 'id', 'name', 'bundle' or 'revision'.
|
|
* @return
|
|
* The name of the key used by the entity.
|
|
*/
|
|
public function entityKey($name) {
|
|
return isset($this->entityInfo['entity keys'][$name]) ? $this->entityInfo['entity keys'][$name] : FALSE;
|
|
}
|
|
|
|
/**
|
|
* Returns the entity label.
|
|
*
|
|
* @see entity_label()
|
|
*/
|
|
public function label() {
|
|
if ($entity = $this->value()) {
|
|
return entity_label($this->type, $entity);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns a string to use to identify this wrapper in error messages.
|
|
*/
|
|
public function debugIdentifierLocation() {
|
|
// An entity wrapper can be at the top of the chain or a part of it.
|
|
if (isset($this->info['name'])) {
|
|
// This wrapper is part of a chain, eg in the position node->author.
|
|
// Return the name.
|
|
$debug = $this->info['name'];
|
|
}
|
|
else {
|
|
// This is a wrapper for an actual entity: return its type and id.
|
|
$debug = $this->info['type'] . '(' . $this->getIdentifier() . ')';
|
|
}
|
|
|
|
if (isset($this->info['parent'])) {
|
|
$debug = $this->info['parent']->debugIdentifierLocation() . '->' . $debug;
|
|
}
|
|
return $debug;
|
|
}
|
|
|
|
/**
|
|
* Prepare for serializiation.
|
|
*/
|
|
public function __sleep() {
|
|
$vars = parent::__sleep();
|
|
// Don't serialize the loaded entity and its property info.
|
|
unset($vars['data'], $vars['propertyInfo'], $vars['propertyInfoAltered'], $vars['entityInfo']);
|
|
// In case the entity is not saved yet, serialize the unsaved data.
|
|
if ($this->dataAvailable() && $this->id === FALSE) {
|
|
$vars['data'] = 'data';
|
|
}
|
|
return $vars;
|
|
}
|
|
|
|
public function __wakeup() {
|
|
$this->setUp();
|
|
if ($this->id !== FALSE) {
|
|
// Make sure data is set, so the entity will be loaded when needed.
|
|
$this->data = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Wraps a list of values.
|
|
*
|
|
* If the wrapped data is a list of data, its numerical indexes may be used to
|
|
* retrieve wrappers for the list items. For that this wrapper implements
|
|
* ArrayAccess so it may be used like a usual numerically indexed array.
|
|
*/
|
|
class EntityListWrapper extends EntityMetadataWrapper implements IteratorAggregate, ArrayAccess, Countable {
|
|
|
|
/**
|
|
* The type of contained items.
|
|
*/
|
|
protected $itemType;
|
|
|
|
/**
|
|
* Whether this is a list of entities with a known entity type, i.e. for
|
|
* generic list of entities (list<entity>) this is FALSE.
|
|
*/
|
|
protected $isEntityList;
|
|
|
|
|
|
public function __construct($type, $data = NULL, $info = array()) {
|
|
parent::__construct($type, NULL, $info);
|
|
|
|
$this->itemType = entity_property_list_extract_type($this->type);
|
|
if (!$this->itemType) {
|
|
$this->itemType = 'unknown';
|
|
}
|
|
$this->isEntityList = (bool) entity_get_info($this->itemType);
|
|
|
|
if (isset($data)) {
|
|
$this->set($data);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the wrapper for a single item.
|
|
*
|
|
* @return
|
|
* An instance of EntityMetadataWrapper.
|
|
*/
|
|
public function get($delta) {
|
|
// Look it up in the cache if possible.
|
|
if (!array_key_exists($delta, $this->cache)) {
|
|
if (!isset($delta)) {
|
|
// The [] operator has been used so point at a new entry.
|
|
$values = parent::value();
|
|
$delta = $values ? max(array_keys($values)) + 1 : 0;
|
|
}
|
|
if (is_numeric($delta)) {
|
|
$info = array('parent' => $this, 'name' => $delta) + $this->info;
|
|
$this->cache[$delta] = entity_metadata_wrapper($this->itemType, NULL, $info);
|
|
}
|
|
else {
|
|
throw new EntityMetadataWrapperException('There can be only numerical keyed items in a list.');
|
|
}
|
|
}
|
|
return $this->cache[$delta];
|
|
}
|
|
|
|
protected function getPropertyValue($delta) {
|
|
// Make use parent::value() to easily by-pass any entity-loading.
|
|
$data = parent::value();
|
|
if (isset($data[$delta])) {
|
|
return $data[$delta];
|
|
}
|
|
}
|
|
|
|
protected function getPropertyRaw($delta) {
|
|
return $this->getPropertyValue($delta);
|
|
}
|
|
|
|
protected function setProperty($delta, $value) {
|
|
$data = parent::value();
|
|
if (is_numeric($delta)) {
|
|
$data[$delta] = $value;
|
|
$this->set($data);
|
|
}
|
|
}
|
|
|
|
protected function propertyAccess($delta, $op, $account = NULL) {
|
|
return $this->access($op, $account);
|
|
}
|
|
|
|
/**
|
|
* Returns the list as numerically indexed array.
|
|
*
|
|
* Note that a list of entities might contain stale entity references. In
|
|
* that case the wrapper and the identifier of a stale reference would be
|
|
* still accessible, however the entity object value would be NULL. That way,
|
|
* there may be NULL values in lists of entity objects due to stale entity
|
|
* references.
|
|
*
|
|
* @param $options
|
|
* An array of options. Known keys:
|
|
* - identifier: If set to TRUE for a list of entities, it won't be returned
|
|
* as list of fully loaded entity objects, but as a list of entity ids.
|
|
* Note that this list may contain ids of stale entity references.
|
|
*/
|
|
public function value(array $options = array()) {
|
|
// For lists of entities fetch full entity objects before returning.
|
|
// Generic entity-wrappers need to be handled separately though.
|
|
if ($this->isEntityList && empty($options['identifier']) && $this->dataAvailable()) {
|
|
$list = parent::value();
|
|
$entities = $list ? entity_load($this->get(0)->type, $list) : array();
|
|
// Make sure to keep the array keys as present in the list.
|
|
foreach ($list as $key => $id) {
|
|
// In case the entity cannot be loaded, we return NULL just as for empty
|
|
// properties.
|
|
$list[$key] = isset($entities[$id]) ? $entities[$id] : NULL;
|
|
}
|
|
return $list;
|
|
}
|
|
return parent::value();
|
|
}
|
|
|
|
public function set($values) {
|
|
// Support setting lists of fully loaded entities.
|
|
if ($this->isEntityList && $values && is_object(reset($values))) {
|
|
foreach ($values as $key => $value) {
|
|
// Ignore outdated NULL value references in lists of entities.
|
|
if (isset($value)) {
|
|
list($id, $vid, $bundle) = entity_extract_ids($this->itemType, $value);
|
|
$values[$key] = $id;
|
|
}
|
|
}
|
|
}
|
|
return parent::set($values);
|
|
}
|
|
|
|
/**
|
|
* If we wrap a list, we return an iterator over the data list.
|
|
*/
|
|
public function getIterator() {
|
|
// In case there is no data available, just iterate over the first item.
|
|
return new EntityMetadataWrapperIterator($this, ($this->dataAvailable() && is_array(parent::value())) ? array_keys(parent::value()) : array(0));
|
|
}
|
|
|
|
/**
|
|
* Implements the ArrayAccess interface.
|
|
*/
|
|
public function offsetGet($delta) {
|
|
return $this->get($delta);
|
|
}
|
|
|
|
public function offsetExists($delta) {
|
|
return $this->dataAvailable() && ($data = $this->value()) && array_key_exists($delta, $data);
|
|
}
|
|
|
|
public function offsetSet($delta, $value) {
|
|
$this->get($delta)->set($value);
|
|
}
|
|
|
|
public function offsetUnset($delta) {
|
|
if ($this->offsetExists($delta)) {
|
|
unset($this->data[$delta]);
|
|
$this->set($this->data);
|
|
}
|
|
}
|
|
|
|
public function count() {
|
|
return $this->dataAvailable() ? count($this->value()) : 0;
|
|
}
|
|
|
|
/**
|
|
* Overridden.
|
|
*/
|
|
public function validate($value) {
|
|
// Required lists may not be empty or unset.
|
|
if (!empty($this->info['required']) && empty($value)) {
|
|
return FALSE;
|
|
}
|
|
return parent::validate($value);
|
|
}
|
|
|
|
/**
|
|
* Returns the label for the list of set values if available.
|
|
*/
|
|
public function label() {
|
|
if ($options = $this->optionsList('view')) {
|
|
$options = entity_property_options_flatten($options);
|
|
$labels = array_intersect_key($options, array_flip((array) parent::value()));
|
|
}
|
|
else {
|
|
// Get each label on its own, e.g. to support getting labels of a list
|
|
// of entities.
|
|
$labels = array();
|
|
foreach ($this as $key => $property) {
|
|
$label = $property->label();
|
|
if (!$label) {
|
|
return NULL;
|
|
}
|
|
$labels[] = $label;
|
|
}
|
|
}
|
|
return isset($labels) ? implode(', ', $labels) : NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Provide a separate Exception so it can be caught separately.
|
|
*/
|
|
class EntityMetadataWrapperException extends Exception { }
|
|
|
|
|
|
/**
|
|
* Allows to easily iterate over existing child wrappers.
|
|
*/
|
|
class EntityMetadataWrapperIterator implements RecursiveIterator {
|
|
|
|
protected $position = 0;
|
|
protected $wrapper, $keys;
|
|
|
|
public function __construct(EntityMetadataWrapper $wrapper, array $keys) {
|
|
$this->wrapper = $wrapper;
|
|
$this->keys = $keys;
|
|
}
|
|
|
|
function rewind() {
|
|
$this->position = 0;
|
|
}
|
|
|
|
function current() {
|
|
return $this->wrapper->get($this->keys[$this->position]);
|
|
}
|
|
|
|
function key() {
|
|
return $this->keys[$this->position];
|
|
}
|
|
|
|
function next() {
|
|
$this->position++;
|
|
}
|
|
|
|
function valid() {
|
|
return isset($this->keys[$this->position]);
|
|
}
|
|
|
|
public function hasChildren() {
|
|
return $this->current() instanceof IteratorAggregate;
|
|
}
|
|
|
|
public function getChildren() {
|
|
return $this->current()->getIterator();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* An array object implementation keeping the reference on the given array so
|
|
* changes to the object are reflected in the passed array.
|
|
*/
|
|
class EntityMetadataArrayObject implements ArrayAccess, Countable, IteratorAggregate {
|
|
|
|
protected $data;
|
|
|
|
public function __construct(&$array) {
|
|
$this->data =& $array;
|
|
}
|
|
|
|
public function &getArray() {
|
|
return $this->data;
|
|
}
|
|
|
|
/**
|
|
* Implements the ArrayAccess interface.
|
|
*/
|
|
public function offsetGet($delta) {
|
|
return $this->data[$delta];
|
|
}
|
|
|
|
public function offsetExists($delta) {
|
|
return array_key_exists($delta, $this->data);
|
|
}
|
|
|
|
public function offsetSet($delta, $value) {
|
|
$this->data[$delta] = $value;
|
|
}
|
|
|
|
public function offsetUnset($delta) {
|
|
unset($this->data[$delta]);
|
|
}
|
|
|
|
public function count() {
|
|
return count($this->data);
|
|
}
|
|
|
|
public function getIterator() {
|
|
return new ArrayIterator($this->data);
|
|
}
|
|
}
|