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lib/absinthe/phase/document/validation/known_argument_names.ex
defmodule Absinthe.Phase.Document.Validation.KnownArgumentNames do
@moduledoc false
# Validates document to ensure that all arguments are in the schema.
#
# Note: while graphql-js doesn't add errors to unknown arguments that
# are provided to unknown fields, Absinthe does -- but when the errors
# are harvested from the Blueprint tree, only the first layer of unknown
# errors (eg, the field) should be presented to the user.
alias Absinthe.{Blueprint, Phase, Schema, Type}
use Absinthe.Phase
@doc """
Run the validation.
"""
@spec run(Blueprint.t, Keyword.t) :: Phase.result_t
def run(input, _options \\ []) do
result = Blueprint.prewalk(input, &handle_node(&1, input.schema))
{:ok, result}
end
@spec handle_node(Blueprint.node_t, Schema.t) :: Blueprint.node_t
defp handle_node(%{schema_node: nil} = node, _schema) do
node
end
defp handle_node(%{selections: _, schema_node: schema_node} = node, schema)do
selections = Enum.map(node.selections, fn
%{arguments: arguments} = field ->
arguments = Enum.map(arguments, fn
%{schema_node: nil} = arg ->
arg
|> flag_invalid(:no_schema_node)
|> put_error(field_error(arg, field, type_name(schema_node, schema)))
other ->
other
end)
%{field | arguments: arguments}
other ->
other
end)
%{node | selections: selections}
end
defp handle_node(%Blueprint.Directive{} = node, _) do
arguments = Enum.map(node.arguments, fn
%{schema_node: nil} = arg ->
arg
|> flag_invalid(:no_schema_node)
|> put_error(directive_error(arg, node))
other ->
other
end)
%{node | arguments: arguments}
end
defp handle_node(node, _) do
node
end
@spec type_name(Type.t, Schema.t) :: String.t
defp type_name(%Type.Field{} = node, schema) do
node.type
|> Type.unwrap
|> schema.__absinthe_lookup__()
|> Map.fetch!(:name)
end
defp type_name(node, _) do
node.name
end
# Generate the error for a directive argument
@spec directive_error(Blueprint.node_t, Blueprint.node_t) :: Phase.Error.t
defp directive_error(argument_node, directive_node) do
%Phase.Error{
phase: __MODULE__,
message: directive_error_message(argument_node.name, directive_node.name),
locations: [argument_node.source_location],
}
end
# Generate the error for a field argument
@spec field_error(Blueprint.node_t, Blueprint.node_t, String.t) :: Phase.Error.t
defp field_error(argument_node, field_node, type_name) do
%Phase.Error{
phase: __MODULE__,
message: field_error_message(argument_node.name, field_node.name, type_name),
locations: [argument_node.source_location],
}
end
@doc """
Generate an error for a directive argument
"""
@spec directive_error_message(String.t, String.t) :: String.t
def directive_error_message(argument_name, directive_name) do
~s(Unknown argument "#{argument_name}" on directive "@#{directive_name}".)
end
@doc """
Generate an error for a field argument
"""
@spec field_error_message(String.t, String.t, String.t) :: String.t
def field_error_message(argument_name, field_name, type_name) do
~s(Unknown argument "#{argument_name}" on field "#{field_name}" of type "#{type_name}".)
end
end