159 lines
3.9 KiB
Elixir
159 lines
3.9 KiB
Elixir
defmodule Cannery.Ammo.Pack do
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@moduledoc """
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A group of a certain ammunition type.
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Can be placed in a container, and contains auxiliary information such as the
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amount paid for that ammunition, or what condition it is in
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"""
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use Cannery, :schema
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alias Cannery.{Ammo.Type, Containers, Containers.Container}
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@derive {Jason.Encoder,
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only: [
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:container_id,
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:count,
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:id,
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:lot_number,
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:notes,
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:price_paid,
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:type_id
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]}
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schema "packs" do
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field :count, :integer
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field :lot_number, :string
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field :notes, :string
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field :price_paid, :float
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field :purchased_on, :date
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belongs_to :type, Type
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field :container_id, :binary_id
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field :user_id, :binary_id
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timestamps(type: :utc_datetime_usec)
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end
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@type t :: %__MODULE__{
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count: integer,
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id: id(),
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lot_number: String.t() | nil,
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notes: String.t() | nil,
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price_paid: float() | nil,
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purchased_on: Date.t(),
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type: Type.t() | nil,
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type_id: Type.id(),
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container_id: Container.id(),
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user_id: User.id(),
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inserted_at: DateTime.t(),
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updated_at: DateTime.t()
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}
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@type new_pack :: %__MODULE__{}
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@type id :: UUID.t()
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@type changeset :: Changeset.t(t() | new_pack())
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@doc false
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@spec create_changeset(
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new_pack(),
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Type.t() | nil,
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Container.t() | nil,
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User.t(),
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attrs :: map()
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) :: changeset()
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def create_changeset(
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pack,
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type,
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container,
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%User{id: user_id},
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attrs
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)
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when is_binary(user_id) do
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type_id =
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case type do
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%Type{id: type_id} when is_binary(type_id) ->
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type_id
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_invalid_type ->
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nil
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end
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container_id =
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case container do
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%Container{id: container_id, user_id: ^user_id} when is_binary(container_id) ->
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container_id
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_invalid_container ->
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nil
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end
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pack
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|> change(type_id: type_id)
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|> change(container_id: container_id)
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|> change(user_id: user_id)
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|> cast(attrs, [
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:count,
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:lot_number,
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:notes,
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:price_paid,
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:purchased_on
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])
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|> validate_required(:type_id, message: dgettext("errors", "Please select a valid type"))
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|> validate_required(:container_id,
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message: dgettext("errors", "Please select a valid container")
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)
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|> validate_number(:count, greater_than: 0)
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|> validate_number(:price_paid, greater_than_or_equal_to: 0)
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|> validate_length(:lot_number, max: 255)
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|> validate_required([
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:container_id,
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:count,
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:purchased_on,
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:type_id,
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:user_id
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])
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end
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@doc false
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@spec update_changeset(t() | new_pack(), attrs :: map(), User.t()) :: changeset()
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def update_changeset(pack, attrs, user) do
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pack
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|> cast(attrs, [
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:container_id,
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:count,
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:lot_number,
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:notes,
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:price_paid,
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:purchased_on
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])
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|> validate_number(:count, greater_than_or_equal_to: 0)
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|> validate_number(:price_paid, greater_than_or_equal_to: 0)
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|> validate_container_id(user)
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|> validate_length(:lot_number, max: 255)
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|> validate_required([
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:container_id,
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:count,
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:purchased_on
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])
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end
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defp validate_container_id(changeset, user) do
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container_id = changeset |> Changeset.get_field(:container_id)
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if container_id do
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Containers.get_container!(container_id, user)
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end
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changeset
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end
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@doc """
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This range changeset is used when "using up" packs, and allows for
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updating the count to 0
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"""
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@spec range_changeset(t() | new_pack(), attrs :: map()) :: changeset()
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def range_changeset(pack, attrs) do
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pack
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|> cast(attrs, [:count])
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|> validate_required([:count])
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end
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end
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