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absinthe lib absinthe blueprint directive.ex
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lib/absinthe/blueprint/directive.ex

defmodule Absinthe.Blueprint.Directive do
alias Absinthe.{Blueprint, Phase}
@enforce_keys [:name]
defstruct [
:name,
arguments: [],
# When part of a Document
source_location: nil,
# Added by phases
schema_node: nil,
flags: %{},
errors: [],
]
@type t :: %__MODULE__{
name: String.t,
arguments: [Blueprint.Input.Argument.t],
source_location: nil | Blueprint.Document.SourceLocation.t,
schema_node: nil | Absinthe.Type.Directive.t,
flags: Blueprint.flags_t,
errors: [Phase.Error.t],
}
@spec expand(t, Blueprint.node_t) :: {t, map}
def expand(%__MODULE__{schema_node: %{expand: nil}}, node) do
node
end
def expand(%__MODULE__{schema_node: %{expand: fun}} = directive, node) do
args = Blueprint.Input.Argument.value_map(directive.arguments)
fun.(args, node)
end
def expand(%__MODULE__{schema_node: nil}, node) do
node
end
@doc """
Determine the placement name for a given Blueprint node
"""
@spec placement(Blueprint.node_t) :: nil | atom
def placement(%Blueprint.Document.Operation{type: type}), do: type
def placement(%Blueprint.Document.Field{}), do: :field
def placement(%Blueprint.Document.Fragment.Named{}), do: :fragment_definition
def placement(%Blueprint.Document.Fragment.Spread{}), do: :fragment_spread
def placement(%Blueprint.Document.Fragment.Inline{}), do: :inline_fragment
def placement(%Blueprint.Document.Operation{}), do: :operation_definition
def placement(%Blueprint.Schema.SchemaDefinition{}), do: :schema
def placement(%Blueprint.Schema.ScalarTypeDefinition{}), do: :scalar
def placement(%Blueprint.Schema.ObjectTypeDefinition{}), do: :object
def placement(%Blueprint.Schema.FieldDefinition{}), do: :field_definition
def placement(%Blueprint.Schema.InterfaceTypeDefinition{}), do: :interface
def placement(%Blueprint.Schema.UnionTypeDefinition{}), do: :union
def placement(%Blueprint.Schema.EnumTypeDefinition{}), do: :enum
def placement(%Blueprint.Schema.EnumValueDefinition{}), do: :enum_value
def placement(%Blueprint.Schema.InputObjectTypeDefinition{}), do: :input_object
def placement(%Blueprint.Schema.InputValueDefinition{placement: placement}), do: placement
end