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0.1.0
Spawn is the core lib for Spawn Actors System
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lib/spawn/utils/any_serializer.ex
defmodule Spawn.Utils.AnySerializer do
@moduledoc """
`AnySerializer` is responsible for serializing the protobuf type Any to Elixir
structures and vice versa.
"""
alias Google.Protobuf.Any
alias Eigr.Functions.Protocol.JSONType
import Spawn.Utils.Common, only: [to_existing_atom_or_new: 1]
def unpack_any_bin(bin),
do:
Any.decode(bin)
|> unpack_unknown()
def unpack_unknown({:value, any}), do: unpack_unknown(any)
def unpack_unknown({:noop, any}), do: unpack_unknown(any)
def unpack_unknown(%{type_url: type_url} = any) do
package_name =
type_url
|> String.replace("type.googleapis.com/", "")
|> String.split(".")
|> Enum.map_join(".", &upcase_first/1)
|> then(fn package -> Enum.join(["Elixir", package], ".") end)
any_unpack!(any, to_existing_atom_or_new(package_name))
|> maybe_unpack_json!
end
def unpack_unknown(_), do: nil
defp maybe_unpack_json!(%JSONType{} = json) do
Jason.decode!(json.content, keys: :atoms)
end
defp maybe_unpack_json!(any_unpacked), do: any_unpacked
def json_any_pack!(map) do
%JSONType{content: Jason.encode!(map)}
|> any_pack!()
end
def pack_all_to_any(nil, _state_type), do: {:ok, nil}
def pack_all_to_any(record, :json) when is_map(record), do: {:ok, json_any_pack!(record)}
def pack_all_to_any(%Any{} = record, _state_type), do: {:ok, record}
def pack_all_to_any(record, state_type), do: any_pack(record, state_type)
def any_pack!(nil), do: nil
def any_pack!(%Any{} = record), do: record
def any_pack!(record) when is_struct(record) do
%Any{
type_url: get_type_url(record.__struct__),
value: apply(record.__struct__, :encode, [record])
}
end
def any_pack!(_), do: raise(ArgumentError, "wrong_action_output")
def any_unpack!(any_record, builder) do
builder.decode(any_record.value)
end
defp get_type_url(type) do
parts =
type
|> to_string
|> String.replace("Elixir.", "")
|> String.split(".")
package_name =
with {_, list} <- parts |> List.pop_at(-1),
do: Enum.map_join(list, ".", &String.downcase/1)
type_name = parts |> List.last()
"type.googleapis.com/#{package_name}.#{type_name}"
end
defp upcase_first(<<first::utf8, rest::binary>>), do: String.upcase(<<first::utf8>>) <> rest
defp any_pack(record, state_type) when is_struct(record) do
{:ok,
%Any{
type_url: get_type_url(state_type),
value: apply(state_type, :encode, [record])
}}
end
defp any_pack(_, _), do: {:error, :invalid_state}
end