62 lines
1.8 KiB
Elixir
62 lines
1.8 KiB
Elixir
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defmodule Mebe2 do
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@moduledoc """
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Documentation for Mebe2.
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"""
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@conf_datatypes %{
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force_read_more: :bool,
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enable_feeds: :bool,
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feeds_full_content: :bool,
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posts_per_page: :int,
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posts_in_feed: :int,
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disqus_comments: :bool,
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page_commenting: :bool,
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port: :int,
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host_port: :int
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}
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@doc """
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Get a configuration setting.
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Gets setting from env vars (same name as setting, but with ALL_CAPS), and uses
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Application.get_env as backup. If setting has a datatype conversion defined above, that will
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be used to map the return datatype. Otherwise return value will be string (if from env var) or
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any() (if from config file).
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"""
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@spec get_conf(atom()) :: any()
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def get_conf(key) do
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val =
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case key |> Atom.to_string() |> String.upcase() |> System.get_env() do
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nil -> Application.get_env(:mebe_2, key)
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val -> val
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end
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case Map.get(@conf_datatypes, key) do
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nil ->
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val
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atom ->
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fun = "get_#{Atom.to_string(atom)}!" |> String.to_atom()
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apply(__MODULE__, fun, [val])
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end
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end
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@doc """
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Get boolean from env value, strings ("true", "false") or booleans are accepted as, others will
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raise.
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"""
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@spec get_bool!(atom() | String.t()) :: boolean()
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def get_bool!(val) when is_boolean(val), do: val
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def get_bool!("true"), do: true
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def get_bool!("false"), do: false
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def get_bool!(val), do: raise("'#{inspect(val)}' is invalid value for boolean.")
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@doc """
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Get integer from env value, integer strings and integers are accepted, others will raise.
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"""
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@spec get_int!(integer() | String.t()) :: integer()
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def get_int!(val) when is_integer(val), do: val
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def get_int!(val) when is_binary(val), do: String.to_integer(val)
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def get_int!(val), do: raise("'#{inspect(val)}' is invalid value for integer.")
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end
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