defmodule Ash.Type.Integer do
@constraints [
max: [
type: {:custom, __MODULE__, :integer, []},
doc: "Enforces a maximum on the value"
],
min: [
type: {:custom, __MODULE__, :integer, []},
doc: "Enforces a minimum on the value"
]
]
@moduledoc """
Represents a simple integer
A builtin type that can be referenced via `:integer`
### Constraints
#{Spark.OptionsHelpers.docs(@constraints)}
"""
use Ash.Type
@impl true
def storage_type, do: :integer
@impl true
def generator(constraints) do
min = constraints[:min] || -2_147_483_648
max = constraints[:max] || 2_147_483_647
StreamData.integer(min..max)
end
@impl true
def constraints, do: @constraints
@doc false
def integer(value) when is_integer(value), do: {:ok, value}
def integer(_), do: {:error, "must be an integer"}
def apply_constraints(nil, _), do: :ok
def apply_constraints(value, constraints) do
errors =
Enum.reduce(constraints, [], fn
{:max, max}, errors ->
if value > max do
[[message: "must be less than or equal to %{max}", max: max] | errors]
else
errors
end
{:min, min}, errors ->
if value < min do
[[message: "must be more than or equal to %{min}", min: min] | errors]
else
errors
end
end)
case errors do
[] -> {:ok, value}
errors -> {:error, errors}
end
end
@impl true
def cast_input(value, _) do
Ecto.Type.cast(:integer, value)
end
@impl true
def cast_stored(nil, _), do: {:ok, nil}
def cast_stored(string, constraints) when is_binary(string) do
case Integer.parse(string) do
{integer, ""} ->
cast_stored(integer, constraints)
_ ->
:error
end
end
def cast_stored(value, _) do
Ecto.Type.load(:integer, value)
end
@impl true
def dump_to_native(nil, _), do: {:ok, nil}
def dump_to_native(value, _) do
Ecto.Type.dump(:integer, value)
end
end