56 lines
1.4 KiB
Elixir
56 lines
1.4 KiB
Elixir
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defmodule Isn do
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alias Postgrex.TypeInfo
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@behaviour Postgrex.Extension
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@isn ~w(ean13 isbn13 ismn13 issn13 isbn ismn issn upc)
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def init(parameters, _opts),
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do: parameters
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def matching(_library),
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do: Enum.reduce(@isn, [], fn(t, ack) -> ack ++ [type: t] end)
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def format(_),
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do: :text
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def encode(%TypeInfo{type: type}, binary, _types, _opts) when type in @isn,
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do: binary
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def decode(%TypeInfo{type: type}, binary, _types, _opts) when type in @isn,
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do: binary
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end
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defmodule Isn.Base do
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defmacro __using__(isn_type) do
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quote bind_quoted: [isn_type: isn_type] do
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# @behaviour Ecto.Type
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#
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@isn_type isn_type
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@moduledoc """
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Definition for the #{@isn_type} module.
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"""
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def type,
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do: @isn_type
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defdelegate blank?, to: Ecto.Type
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def cast(nil), do: :error
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def cast(isn), do: {:ok, to_string(isn)}
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def load(isn), do: {:ok, to_string(isn)}
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def dump(isn), do: {:ok, to_string(isn)}
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end
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end
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end
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defmodule Isn.ISBN, do: use(Isn.Base, :isbn)
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defmodule Isn.ISMN, do: use(Isn.Base, :ismn)
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defmodule Isn.ISSN, do: use(Isn.Base, :issn)
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defmodule Isn.ISBN13, do: use(Isn.Base, :isbn13)
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defmodule Isn.ISMN13, do: use(Isn.Base, :ismn13)
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defmodule Isn.ISSN13, do: use(Isn.Base, :issn13)
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defmodule Isn.UPC, do: use(Isn.Base, :upc)
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defmodule Isn.EAN13, do: use(Isn.Base, :ean13)
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