WIP

lib/chore_tracker/accounts/user.ex

@@ -1,6 +1,7 @@
 defmodule ChoreTracker.Accounts.User do
   use Ecto.Schema
   import Ecto.Changeset
+  alias ChoreTracker.Chores
 
   schema "users" do
     field :username, :string
@@ -12,6 +13,8 @@ defmodule ChoreTracker.Accounts.User do
     field :display_name, :string
 
     timestamps(type: :utc_datetime)
+
+    has_many :assigned_chores, Chores.Chore, foreign_key: :next_assignee_id
   end
 
   @doc """

lib/chore_tracker/chores.ex

@@ -19,24 +19,41 @@ defmodule ChoreTracker.Chores do
     do: Repo.get!(Chore, id) |> Repo.preload([{:logs, :user}, :assignees, :next_assignee])
 
   def create_chore(attrs \\ %{}) do
-    %Chore{}
-    |> change_chore(attrs)
-    |> Repo.insert()
+    result =
+      Ecto.Multi.new()
+      |> Ecto.Multi.insert(:chore, change_chore(%Chore{}, attrs))
+      |> Ecto.Multi.update(:chore_with_assignee, fn %{chore: chore} ->
+        next_assignee = next_chore_assignee(chore)
+        change_chore_assignee(chore, next_assignee)
+      end)
+      |> Repo.transaction()
+
+    case result do
+      {:ok, %{chore_with_assignee: chore}} -> {:ok, chore}
+      {:error, :chore, changeset, _} -> {:error, changeset}
+    end
   end
 
   def update_chore(%Chore{} = chore, attrs) do
     changeset = change_chore(chore, attrs)
 
+    result =
       Ecto.Multi.new()
       |> Ecto.Multi.update(:chore, changeset)
-    |> Ecto.Multi.run(:update_next_assignee, fn _repo, %{chore: chore} ->
+      |> Ecto.Multi.update(:chore_with_assignee, fn %{chore: chore} ->
         if Ecto.Changeset.changed?(changeset, :assignees) do
-        save_next_chore_assignee(chore)
+          next_assignee = next_chore_assignee(chore)
+          change_chore_assignee(chore, next_assignee)
         else
-        {:ok, chore}
+          Ecto.Changeset.change(chore)
         end
       end)
       |> Repo.transaction()
+
+    case result do
+      {:ok, %{chore_with_assignee: chore}} -> {:ok, chore}
+      {:error, :chore, changeset, _} -> {:error, changeset}
+    end
   end
 
   def delete_chore(%Chore{} = chore) do
@@ -51,12 +68,14 @@ defmodule ChoreTracker.Chores do
     |> Changeset.put_assoc(:assignees, assignees)
   end
 
-  def update_chore_assignee(%Chore{} = chore, attrs) do
-    change_chore_assignee(chore, attrs) |> Repo.update()
+  def change_chore_assignee(%Chore{} = chore, user) do
+    id =
+      case user do
+        nil -> nil
+        %User{} -> user.id
       end
 
-  def change_chore_assignee(%Chore{} = chore, attrs \\ %{}) do
-    chore |> Ecto.Changeset.cast(attrs, [:next_assignee_id])
+    chore |> Ecto.Changeset.change(%{next_assignee_id: id})
   end
 
   def get_last_chore_log_for_assignee(%Chore{} = chore, %User{} = user) do
@@ -74,8 +93,9 @@ defmodule ChoreTracker.Chores do
       :log,
       %ChoreLog{} |> ChoreLog.changeset(%{user_id: user.id, chore_id: chore.id})
     )
-    |> Ecto.Multi.run(:chore, fn _repo, _change ->
-      save_next_chore_assignee(chore)
+    |> Ecto.Multi.update(:chore_assignee, fn _ ->
+      next_assignee = next_chore_assignee(chore)
+      change_chore_assignee(chore, next_assignee)
     end)
     |> Repo.transaction()
   end
@@ -113,28 +133,21 @@ defmodule ChoreTracker.Chores do
   Returns `nil` if chore has no assignees.
   """
   def next_chore_assignee(%Chore{} = chore) do
+    chore = chore |> Repo.preload([{:assignees, :assigned_chores}])
+
     chore.assignees
-    |> Enum.map(&{&1, get_last_chore_log_for_assignee(chore, &1)})
     |> Enum.sort_by(
-      fn {_assignee, log} ->
-        case log do
+      fn assignee ->
+        time =
+          case get_last_chore_log_for_assignee(chore, assignee) do
             nil -> 0
             %ChoreLog{inserted_at: inserted_at} -> DateTime.to_unix(inserted_at)
           end
+
+        {time, length(assignee.assigned_chores)}
       end,
-      :asc
+      :desc
     )
-    |> Enum.map(fn {assignee, _log} -> assignee end)
     |> List.first()
   end
-
-  defp save_next_chore_assignee(%Chore{} = chore) do
-    next_assignee = next_chore_assignee(chore)
-
-    if next_assignee do
-      chore |> update_chore_assignee(%{next_assignee_id: next_assignee.id})
-    else
-      {:ok, nil}
-    end
-  end
 end

lib/chore_tracker_web/live/chore_live/form_component.ex

@@ -21,7 +21,7 @@ defmodule ChoreTrackerWeb.ChoreLive.FormComponent do
       >
         <div class="flex gap-2 flex-wrap">
           <.input field={@form[:name]} type="text" label="Name" wrapper_class="flex-1" />
-          <.input field={@form[:emoji]} type="text" label="Emoji" />
+          <.input field={@form[:emoji]} type="text" label="Emoji" min="1" max="1" />
         </div>
         <.input field={@form[:description]} type="textarea" label="Description" />
         <div class="flex gap-6 flex-wrap">

lib/chore_tracker_web/live/chore_live/show.ex

@@ -41,7 +41,7 @@ defmodule ChoreTrackerWeb.ChoreLive.Show do
     %{"chore" => chore_params} = params
     chore = socket.assigns.chore
 
-    case Chores.update_chore_assignee(chore, chore_params) do
+    case Chores.update_chore(chore, chore_params) do
       {:ok, chore} ->
         {:noreply,
          socket
@@ -57,6 +57,6 @@ defmodule ChoreTrackerWeb.ChoreLive.Show do
   defp update_state(socket, chore) do
     socket
     |> assign(:chore, chore |> Repo.preload(:next_assignee))
-    |> assign(:assignee_form, to_form(Chores.change_chore_assignee(chore)))
+    |> assign(:assignee_form, to_form(Chores.change_chore(chore)))
   end
 end