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lib/absinthe/phase/document/validation/lone_anonymous_operation.ex
defmodule Absinthe.Phase.Document.Validation.LoneAnonymousOperation do
@moduledoc false
# Validates document to ensure that only one operation is provided without
# a name.
alias Absinthe.{Blueprint, Phase}
use Absinthe.Phase
use Absinthe.Phase.Validation
@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)
{:ok, result}
end
# Find the root and check for multiple anonymous operations
@spec handle_node(Blueprint.node_t) :: Blueprint.node_t
defp handle_node(%Blueprint{} = node) do
ops = process(node.operations)
%{node | operations: ops}
end
defp handle_node(node) do
node
end
@spec process([Blueprint.Document.Operation.t]) :: [Blueprint.Document.Operation.t]
defp process(operations) do
do_process(operations, length(operations))
end
@spec do_process([Blueprint.Document.Operation.t], integer) :: [Blueprint.Document.Operation.t]
defp do_process(operations, count) when count < 2 do
operations
end
defp do_process(operations, _) do
Enum.map(operations, fn
%{name: nil} = op ->
flag_invalid(op, :bad_name)
|> put_error(error(op))
other ->
other
end)
end
# Generate the error for the node
@spec error(Blueprint.node_t) :: Phase.Error.t
defp error(node) do
Phase.Error.new(
__MODULE__,
"This anonymous operation must be the only defined operation.",
node.source_location
)
end
end