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<?php |
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namespace EventEspresso\core\domain\services\graphql\resolvers; |
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use EE_Attendee; |
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use EE_Base_Class; |
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use EE_Event; |
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use EE_Venue; |
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use EE_Datetime; |
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use EE_Ticket; |
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use EE_State; |
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use EEM_State; |
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use EEM_Country; |
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use EE_Error; |
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use EventEspresso\core\exceptions\InvalidDataTypeException; |
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use EventEspresso\core\exceptions\InvalidInterfaceException; |
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use EventEspresso\core\exceptions\UnexpectedEntityException; |
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use EventEspresso\core\services\graphql\resolvers\ResolverBase; |
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use EventEspresso\core\services\graphql\fields\GraphQLField; |
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use Exception; |
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use InvalidArgumentException; |
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use ReflectionException; |
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use GraphQL\Deferred; |
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use GraphQL\Error\UserError; |
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use GraphQL\Type\Definition\ResolveInfo; |
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use GraphQLRelay\Relay; |
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use WPGraphQL\AppContext; |
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/** |
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* Class FieldResolver |
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* Field resolver for a GraphQL type |
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* |
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* @package EventEspresso\core\domain\services\graphql\resolvers |
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* @author Manzoor Wani |
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* @since $VID:$ |
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*/ |
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class FieldResolver extends ResolverBase |
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{ |
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/** |
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* @var mixed $model |
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*/ |
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protected $model; |
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/** |
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* @var array $fields . |
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*/ |
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protected $fields; |
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/** |
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* FieldResolver constructor. |
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* |
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* @param mixed $model The model instance. |
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* @param array $fields The fields registered for the type. |
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*/ |
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public function __construct($model, array $fields) |
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{ |
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$this->model = $model; |
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$this->fields = $fields; |
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} |
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/** |
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* @param mixed $source The source that's passed down the GraphQL queries |
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* @param array $args The inputArgs on the field |
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* @param AppContext $context The AppContext passed down the GraphQL tree |
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* @param ResolveInfo $info The ResolveInfo passed down the GraphQL tree |
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* @return string |
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* @throws EE_Error |
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* @throws Exception |
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* @throws InvalidArgumentException |
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* @throws InvalidDataTypeException |
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* @throws InvalidInterfaceException |
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* @throws ReflectionException |
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* @throws UserError |
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* @throws UnexpectedEntityException |
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* @since $VID:$ |
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*/ |
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public function resolve($source, array $args, AppContext $context, ResolveInfo $info) |
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{ |
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$fieldName = $info->fieldName; |
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$field = isset($this->fields[ $fieldName ]) ? $this->fields[ $fieldName ] : null; |
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// Field should exist in teh registered fields |
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if ($field instanceof GraphQLField) { |
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// check if the field should be resolved. |
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if (! $field->shouldResolve()) { |
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return null; |
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} |
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// Give priority to the internal resolver. |
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if ($field->hasInternalResolver()) { |
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return $field->resolve($source, $args, $context, $info); |
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} |
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if (! ($source instanceof EE_Base_Class)) { |
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return null; |
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} |
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// Check if the field has a key mapped to model. |
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if (! empty($field->key())) { |
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$value = $source->{$field->key()}(); |
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return $field->mayBeFormatValue($value, $source); |
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} |
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switch ($fieldName) { |
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case 'id': // the global ID |
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return $this->resolveId($source); |
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case 'cacheId': |
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return $this->resolveCacheId($source); |
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case 'parent': |
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return $this->resolveParent($source); |
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case 'event': |
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return $this->resolveEvent($source, $args, $context); |
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case 'wpUser': |
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case 'manager': |
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return $this->resolveWpUser($source, $args, $context); |
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case 'userId': |
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return $this->resolveUserId($source, $args, $context); |
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case 'state': // Venue |
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return $this->resolveState($source); |
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case 'country': // State, Venue |
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return $this->resolveCountry($source); |
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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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* Resolve the global ID |
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* |
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* @param mixed $source |
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* @return string|null |
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* @throws Exception |
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* @since $VID:$ |
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*/ |
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public function resolveId($source) |
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{ |
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$ID = $source instanceof EE_Base_Class ? $source->ID() : 0; |
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return $ID ? Relay::toGlobalId($this->model->item_name(), $ID) : null; |
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} |
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/** |
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* Resolve the cache ID |
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* |
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* @param mixed $source |
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* @return string |
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* @since $VID:$ |
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*/ |
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public function resolveCacheId($source) |
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{ |
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$model_name = $this->model->item_name(); |
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$ID = $source->ID(); |
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// Since cacheId does not need to be globally unique |
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// $uniqid is sufficient, still adding the model name and ID |
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// may be we need/use them in future. |
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return uniqid("{$model_name}:{$ID}:", true); |
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} |
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/** |
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* @param mixed $source |
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* @param $args |
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* @param $context |
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* @return Deferred|null |
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* @throws Exception |
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* @since $VID:$ |
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*/ |
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public function resolveWpUser($source, $args, $context) |
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{ |
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$user_id = $source->wp_user(); |
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return $user_id |
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? $context->get_loader('user')->load_deferred($user_id) |
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: null; |
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} |
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/** |
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* @param mixed $source |
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* @param $args |
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* @param $context |
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* @return Deferred|null |
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* @throws Exception |
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* @since $VID:$ |
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*/ |
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public function resolveUserId($source, $args, $context) |
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{ |
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$user_id = $source->wp_user(); |
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return $user_id ? Relay::toGlobalId('user', $user_id) : null; |
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} |
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/** |
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* @param mixed $source |
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* @return EE_Base_Class|null |
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* @throws EE_Error |
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* @throws InvalidArgumentException |
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* @throws InvalidDataTypeException |
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* @throws InvalidInterfaceException |
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* @throws ReflectionException |
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* @since $VID:$ |
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*/ |
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public function resolveParent($source) |
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{ |
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return $this->model->get_one_by_ID($source->parent()); |
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} |
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/** |
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* @param mixed $source |
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* @param $args |
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* @param $context |
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* @return Deferred|null |
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* @throws EE_Error |
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* @throws InvalidArgumentException |
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* @throws InvalidDataTypeException |
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* @throws InvalidInterfaceException |
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* @throws ReflectionException |
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* @throws UserError |
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* @throws UnexpectedEntityException |
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* @since $VID:$ |
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*/ |
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public function resolveEvent($source, $args, $context) |
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{ |
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switch (true) { |
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case $source instanceof EE_Datetime: |
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$event = $source->event(); |
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break; |
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case $source instanceof EE_Venue: |
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case $source instanceof EE_Ticket: |
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$event = $source->get_related_event(); |
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break; |
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default: |
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$event = null; |
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break; |
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} |
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return $event instanceof EE_Event |
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? $context->get_loader('post')->load_deferred($event->ID()) |
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: null; |
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} |
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/** |
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* @param mixed $source The source instance. |
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* @return EE_Base_Class|null |
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* @throws EE_Error |
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* @throws InvalidArgumentException |
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* @throws InvalidDataTypeException |
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* @throws InvalidInterfaceException |
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* @since $VID:$ |
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*/ |
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public function resolveState($source) |
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{ |
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switch (true) { |
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case $source instanceof EE_Attendee: |
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case $source instanceof EE_Venue: |
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$state_id = $source->state_ID(); |
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break; |
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default: |
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$state_id = null; |
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break; |
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} |
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return $state_id |
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? EEM_State::instance()->get_one_by_ID($state_id) |
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: null; |
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} |
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/** |
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* @param mixed $source The source instance. |
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* @return EE_Base_Class|null |
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* @throws EE_Error |
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* @throws InvalidArgumentException |
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* @throws InvalidDataTypeException |
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* @throws InvalidInterfaceException |
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* @since $VID:$ |
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*/ |
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public function resolveCountry($source) |
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{ |
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switch (true) { |
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case $source instanceof EE_State: |
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$country_iso = $source->country_iso(); |
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break; |
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case $source instanceof EE_Attendee: |
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case $source instanceof EE_Venue: |
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$country_iso = $source->country_ID(); |
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break; |
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default: |
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$country_iso = null; |
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break; |
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} |
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return $country_iso |
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? EEM_Country::instance()->get_one_by_ID($country_iso) |
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: null; |
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} |
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} |
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It seems like the method you are trying to call exists only in some of the possible types.
Let’s take a look at an example:
Available Fixes
Add an additional type-check:
Only allow a single type to be passed if the variable comes from a parameter: