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lib/instream/database/validator.ex
defmodule Instream.Database.Validator do
@moduledoc """
Performs compile time validations of database definitions.
"""
@doc """
Checks if all mandatory definitions for a database are available.
"""
@spec proper_series?(module) :: no_return
def proper_series?(database) do
_ =
database
|> defined?
|> name?
end
defp defined?(database) do
case Module.defines?(database, {:__meta__, 1}, :def) do
false -> raise ArgumentError, "missing database definition in module #{database}"
_ -> database
end
end
defp name?(database) do
case database.__meta__(:name) do
nil -> raise ArgumentError, "missing name for database #{database}"
_ -> database
end
end
end