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absinthe
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1.11.0
1.10.2
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0.2.1
0.1.0
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lib/absinthe/phase/document/validation/no_unused_fragments.ex
defmodule Absinthe.Phase.Document.Validation.NoUnusedFragments do
@moduledoc false
# Validates document to ensure that all named fragments are used.
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, input.operations))
{:ok, result}
end
def handle_node(%Blueprint.Document.Fragment.Named{} = node, operations) do
if uses?(node, operations) do
node
else
node
|> flag_invalid(:not_used)
|> put_error(error(node))
end
end
def handle_node(node, _) do
node
end
@spec uses?(Blueprint.Document.Fragment.Named.t, [Blueprint.Document.Operation.t]) :: boolean
defp uses?(node, operations) do
Enum.any?(operations, &Blueprint.Document.Operation.uses?(&1, node))
end
# Generate the error for the node
@spec error(Blueprint.Document.Fragment.Named.t) :: Phase.Error.t
defp error(node) do
Phase.Error.new(
__MODULE__,
error_message(node.name),
location: node.source_location
)
end
@doc """
Generate an error message for an unused fragment.
"""
@spec error_message(String.t) :: String.t
def error_message(name) do
~s(Fragment "#{name}" is never used.)
end
end