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maru
0.11.1
0.14.0-pre.1
0.13.2
0.13.1
0.13.0
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0.12.4
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0.4.1
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0.3.1
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0.2.6
0.2.5
REST-like API micro-framework for elixir inspired by grape.
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lib/maru/runtime.ex
defmodule Maru.Runtime do
@moduledoc false
alias Maru.Struct.Parameter.Runtime, as: PR
alias Maru.Struct.Dependent.Runtime, as: DR
alias Maru.Struct.Validator.Runtime, as: VR
@doc """
parse params from `conn.params`.
"""
def parse_params([], result, _), do: result
def parse_params([%VR{validate_func: func} | t], result, conn_params) do
func.(result)
parse_params(t, result, conn_params)
end
def parse_params([%DR{validators: validators}=h | t], result, conn_params) do
addition = Enum.all?(validators, fn func -> func.(result) end) && h.children || []
parse_params(addition ++ t, result, conn_params)
end
def parse_params([%PR{attr_name: attr_name}=h | t], result, conn_params) do
passed? = conn_params |> Map.has_key?(h.param_key)
value = conn_params |> Map.get(h.param_key)
result =
if Maru.Utils.is_blank(value) do
h.blank_func.({value, passed?, result})
else
value = do_parse(h.parser_func, value, attr_name)
h.validate_func.(value)
value = do_nested(h.nested, h.children, value)
put_in(result, [h.attr_name], value)
end
parse_params(t, result, conn_params)
end
defp do_parse(func, value, attr_name) do
try do
func.(value)
rescue
_ ->
Maru.Exceptions.InvalidFormat
|> raise([reason: :illegal, param: attr_name, value: value])
end
end
defp do_nested(nil, _, value), do: value
defp do_nested(:map, children, value) do
parse_params(children, %{}, value)
end
defp do_nested(:list, children, value) do
Enum.map(value, &parse_params(children, %{}, &1))
end
end