add range mode

lib/cannery/activity_log/shot_group.ex

@@ -0,0 +1,57 @@
+defmodule Cannery.ActivityLog.ShotGroup do
+  @moduledoc """
+  A shot group records a group of ammo shot during a range trip
+  """
+
+  use Ecto.Schema
+  import Ecto.Changeset
+  alias Cannery.{Accounts.User, Ammo.AmmoGroup, ActivityLog.ShotGroup}
+  alias Ecto.{Changeset, UUID}
+
+  @primary_key {:id, :binary_id, autogenerate: true}
+  @foreign_key_type :binary_id
+  schema "shot_groups" do
+    field :count, :integer
+    field :date, :date
+    field :notes, :string
+
+    belongs_to :user, User
+    belongs_to :ammo_group, AmmoGroup
+
+    timestamps()
+  end
+
+  @type t :: %ShotGroup{
+          id: id(),
+          count: integer,
+          notes: String.t() | nil,
+          date: Date.t() | nil,
+          ammo_group: AmmoGroup.t() | nil,
+          ammo_group_id: AmmoGroup.id(),
+          user: User.t() | nil,
+          user_id: User.id(),
+          inserted_at: NaiveDateTime.t(),
+          updated_at: NaiveDateTime.t()
+        }
+  @type new_shot_group :: %ShotGroup{}
+  @type id :: UUID.t()
+
+  @doc false
+  @spec create_changeset(new_shot_group(), attrs :: map()) :: Changeset.t(new_shot_group())
+  def create_changeset(shot_group, attrs) do
+    shot_group
+    |> cast(attrs, [:count, :notes, :date, :ammo_group_id, :user_id])
+    |> validate_number(:count, greater_than: 0)
+    |> validate_required([:count, :ammo_group_id, :user_id])
+  end
+
+  @doc false
+  @spec update_changeset(t() | new_shot_group(), attrs :: map()) ::
+          Changeset.t(t() | new_shot_group())
+  def update_changeset(shot_group, attrs) do
+    shot_group
+    |> cast(attrs, [:count, :notes, :date])
+    |> validate_number(:count, greater_than: 0)
+    |> validate_required([:count])
+  end
+end