130 lines
3.8 KiB
Elixir
130 lines
3.8 KiB
Elixir
defmodule Cannery.ActivityLog.ShotGroup do
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@moduledoc """
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A shot group records a group of ammo shot during a range trip
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"""
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use Ecto.Schema
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import CanneryWeb.Gettext
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import Ecto.Changeset
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alias Cannery.{Accounts.User, Ammo, Ammo.AmmoGroup}
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alias Ecto.{Changeset, UUID}
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@derive {Jason.Encoder,
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only: [
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:id,
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:count,
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:date,
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:notes,
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:ammo_group_id
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]}
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@primary_key {:id, :binary_id, autogenerate: true}
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@foreign_key_type :binary_id
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schema "shot_groups" do
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field :count, :integer
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field :date, :date
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field :notes, :string
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field :user_id, :binary_id
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field :ammo_group_id, :binary_id
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timestamps()
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end
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@type t :: %__MODULE__{
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id: id(),
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count: integer,
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notes: String.t() | nil,
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date: Date.t() | nil,
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ammo_group_id: AmmoGroup.id(),
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user_id: User.id(),
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inserted_at: NaiveDateTime.t(),
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updated_at: NaiveDateTime.t()
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}
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@type new_shot_group :: %__MODULE__{}
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@type id :: UUID.t()
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@type changeset :: Changeset.t(t() | new_shot_group())
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@doc false
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@spec create_changeset(
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new_shot_group(),
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User.t() | any(),
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AmmoGroup.t() | any(),
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attrs :: map()
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) :: changeset()
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def create_changeset(
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shot_group,
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%User{id: user_id},
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%AmmoGroup{id: ammo_group_id, user_id: user_id} = ammo_group,
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attrs
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) do
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shot_group
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|> change(user_id: user_id)
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|> change(ammo_group_id: ammo_group_id)
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|> cast(attrs, [:count, :notes, :date])
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|> validate_length(:notes, max: 255)
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|> validate_create_shot_group_count(ammo_group)
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|> validate_required([:date, :ammo_group_id, :user_id])
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end
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def create_changeset(shot_group, _invalid_user, _invalid_ammo_group, attrs) do
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shot_group
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|> cast(attrs, [:count, :notes, :date])
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|> validate_length(:notes, max: 255)
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|> validate_required([:ammo_group_id, :user_id])
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|> add_error(:invalid, dgettext("errors", "Please select a valid user and ammo pack"))
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end
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defp validate_create_shot_group_count(changeset, %AmmoGroup{count: ammo_group_count}) do
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case changeset |> Changeset.get_field(:count) do
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nil ->
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changeset |> Changeset.add_error(:ammo_left, dgettext("errors", "can't be blank"))
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count when count > ammo_group_count ->
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changeset
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|> Changeset.add_error(:ammo_left, dgettext("errors", "Ammo left must be at least 0"))
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count when count <= 0 ->
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error =
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dgettext("errors", "Ammo left can be at most %{count} rounds",
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count: ammo_group_count - 1
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)
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changeset |> Changeset.add_error(:ammo_left, error)
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_valid_count ->
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changeset
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end
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end
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@doc false
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@spec update_changeset(t() | new_shot_group(), User.t(), attrs :: map()) :: changeset()
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def update_changeset(%__MODULE__{} = shot_group, user, attrs) do
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shot_group
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|> cast(attrs, [:count, :notes, :date])
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|> validate_length(:notes, max: 255)
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|> validate_number(:count, greater_than: 0)
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|> validate_required([:count, :date])
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|> validate_update_shot_group_count(shot_group, user)
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end
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defp validate_update_shot_group_count(
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changeset,
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%__MODULE__{ammo_group_id: ammo_group_id, count: count},
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user
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) do
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%{count: ammo_group_count} = Ammo.get_ammo_group!(ammo_group_id, user)
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new_shot_group_count = changeset |> Changeset.get_field(:count)
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shot_diff_to_add = new_shot_group_count - count
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if shot_diff_to_add > ammo_group_count do
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error =
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dgettext("errors", "Count can be at most %{count} shots", count: ammo_group_count + count)
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changeset |> Changeset.add_error(:count, error)
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else
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changeset
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end
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end
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end
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