38 lines
1.0 KiB
Elixir
38 lines
1.0 KiB
Elixir
defmodule Mobilizon.GraphQL.Schema.Custom.Timezone do
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@moduledoc """
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The timezone scalar type allows timezone ID strings to be passed in and out.
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"""
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use Absinthe.Schema.Notation
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import Mobilizon.Web.Gettext, only: [dgettext: 3]
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scalar :timezone, name: "Timezone" do
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description("""
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The `Timezone` scalar type represents a timezone identifier,
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as registered in the IANA Time Zone Database.
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""")
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serialize(&encode/1)
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parse(&decode/1)
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end
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@spec decode(Absinthe.Blueprint.Input.String.t()) :: {:ok, term} | :error
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@spec decode(Absinthe.Blueprint.Input.Null.t()) :: {:ok, nil}
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defp decode(%Absinthe.Blueprint.Input.String{value: ""}), do: {:ok, nil}
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defp decode(%Absinthe.Blueprint.Input.String{value: value}) do
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if Tzdata.zone_exists?(value),
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do: {:ok, value},
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else: {:error, dgettext("errors", "Timezone ID %{timezone} is invalid", timezone: value)}
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end
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defp decode(%Absinthe.Blueprint.Input.Null{}) do
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{:ok, nil}
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end
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defp decode(_) do
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:error
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end
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defp encode(value), do: value
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end
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