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Ch4s3/my_compile_phase.ex

Created September 15, 2020 19:00
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my_compile_phase.ex
defmodule MyApi.Schema.Pipeline.MyCompilePhase do
@moduledoc """
based on Absinthe phases https://hexdocs.pm/absinthe/1.5.3/Absinthe.Phase.html
"""
alias Absinthe.{Blueprint, Pipeline, Phase}
alias Absinthe.Blueprint.Schema.{ObjectTypeDefinition, FieldDefinition}
def pipeline(pipeline) do
Pipeline.insert_after(pipeline, Phase.Schema.TypeImports, __MODULE__)
end
def run(blueprint = %Blueprint{}, _) do
{:ok, Blueprint.prewalk(blueprint, &rename_library_types(&1))}
end
defp rename_library_types(struct = %ObjectTypeDefinition{module: _}) do
do_process(struct, Module.split(struct.module))
end
defp rename_library_types(struct = %FieldDefinition{module: _}) do
do_process(struct, Module.split(struct.module))
end
defp rename_library_types(struct), do: struct
defp do_process(struct, ["LibraryModule" | _]) do
identifier = struct.identifier |> Atom.to_string()
new_identifier = String.to_atom("prepend_name_" <> identifier)
new_name = "PrependName" <> struct.name
%{struct | identifier: new_identifier, name: new_name}
end
defp do_process(struct, _), do: struct
end
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