Chore: Creates the Person module and refactors a little

lib/app/person.ex

@@ -0,0 +1,6 @@
+defmodule App.Person do
+  @doc """
+  Gets the Person Id from the assigns on connection or socket.
+  """
+  def get_person_id(assigns), do: assigns[:person][:id] || 0
+end

lib/app_web/controllers/tag_controller.ex

@@ -1,6 +1,6 @@
 defmodule AppWeb.TagController do
   use AppWeb, :controller
-  alias App.Tag
+  alias App.{Person, Tag}
   plug :permission_tag when action in [:edit, :update, :delete]
 
   def index(conn, _params) do
@@ -16,7 +16,7 @@ defmodule AppWeb.TagController do
   end
 
   def create(conn, %{"tag" => tag_params}) do
-    person_id = conn.assigns[:person][:id] || 0
+    person_id = Person.get_person_id(conn.assigns)
     tag_params = Map.put(tag_params, "person_id", person_id)
 
     case Tag.create_tag(tag_params) do
@@ -63,7 +63,7 @@ defmodule AppWeb.TagController do
   defp permission_tag(conn, _opts) do
     tag = Tag.get_tag!(conn.params["id"])
 
-    person_id = conn.assigns[:person][:id] || 0
+    person_id = Person.get_person_id(conn.assigns)
 
     if tag.person_id == person_id do
       conn

lib/app_web/live/app_live.ex

@@ -2,23 +2,21 @@ defmodule AppWeb.AppLive do
   require Logger
   use AppWeb, :live_view
   use Timex
-  alias App.{Item, Tag, Timer}
+  alias App.{Item, Person, Tag, Timer}
   # run authentication on mount
   on_mount(AppWeb.AuthController)
   alias Phoenix.Socket.Broadcast
 
   @topic "live"
   @stats_topic "stats"
 
-  defp get_person_id(assigns), do: assigns[:person][:id] || 0
-
   @impl true
   def mount(_params, _session, socket) do
     # subscribe to the channel
     if connected?(socket), do: AppWeb.Endpoint.subscribe(@topic)
     AppWeb.Endpoint.subscribe(@stats_topic)
 
-    person_id = get_person_id(socket.assigns)
+    person_id = Person.get_person_id(socket.assigns)
     items = Item.items_with_timers(person_id)
     tags = Tag.list_person_tags(person_id)
     selected_tags = []
@@ -43,7 +41,7 @@ defmodule AppWeb.AppLive do
 
   @impl true
   def handle_event("validate", %{"text" => text}, socket) do
-    person_id = get_person_id(socket.assigns)
+    person_id = Person.get_person_id(socket.assigns)
     draft = Item.get_draft_item(person_id)
     Item.update_draft(draft, %{text: text})
     # only save draft if person id != 0 (ie not guest)
@@ -52,7 +50,7 @@ defmodule AppWeb.AppLive do
 
   @impl true
   def handle_event("create", %{"text" => text}, socket) do
-    person_id = get_person_id(socket.assigns)
+    person_id = Person.get_person_id(socket.assigns)
 
     Item.create_item_with_tags(%{
       text: text,
@@ -77,7 +75,7 @@ defmodule AppWeb.AppLive do
 
   @impl true
   def handle_event("toggle", data, socket) do
-    person_id = get_person_id(socket.assigns)
+    person_id = Person.get_person_id(socket.assigns)
 
     # Toggle the status of the item between 3 (:active) and 4 (:done)
     status = if Map.has_key?(data, "value"), do: 4, else: 3
@@ -93,7 +91,7 @@ defmodule AppWeb.AppLive do
 
   @impl true
   def handle_event("toggle_tag", value, socket) do
-    person_id = get_person_id(socket.assigns)
+    person_id = Person.get_person_id(socket.assigns)
     selected_tags = socket.assigns.selected_tags
     tag = Tag.get_tag!(value["tag_id"])
     tags = Tag.list_person_tags(person_id)
@@ -105,7 +103,7 @@ defmodule AppWeb.AppLive do
 
   @impl true
   def handle_event("filter-tags", %{"key" => _key, "value" => value}, socket) do
-    person_id = get_person_id(socket.assigns)
+    person_id = Person.get_person_id(socket.assigns)
 
     tags =
       Tag.list_person_tags(person_id)
@@ -154,7 +152,7 @@ defmodule AppWeb.AppLive do
   @impl true
   def handle_event("start", data, socket) do
     item = Item.get_item!(Map.get(data, "id"))
-    person_id = get_person_id(socket.assigns)
+    person_id = Person.get_person_id(socket.assigns)
 
     {:ok, _timer} =
       Timer.start(%{
@@ -199,7 +197,7 @@ defmodule AppWeb.AppLive do
         %{"id" => item_id, "text" => text},
         socket
       ) do
-    person_id = get_person_id(socket.assigns)
+    person_id = Person.get_person_id(socket.assigns)
     current_item = Item.get_item!(item_id)
 
     Item.update_item(current_item, %{
@@ -252,7 +250,7 @@ defmodule AppWeb.AppLive do
 
   @impl true
   def handle_info(%Broadcast{event: "update", payload: payload}, socket) do
-    person_id = get_person_id(socket.assigns)
+    person_id = Person.get_person_id(socket.assigns)
     items = Item.items_with_timers(person_id)
     isEditingItem = socket.assigns.editing
 

lib/app_web/live/stats_live.ex

@@ -1,22 +1,20 @@
 defmodule AppWeb.StatsLive do
   require Logger
   use AppWeb, :live_view
-  alias App.{Stats, DateTimeHelper}
+  alias App.{Stats, DateTimeHelper, Person}
   alias Phoenix.Socket.Broadcast
 
   # run authentication on mount
   on_mount(AppWeb.AuthController)
 
   @stats_topic "stats"
 
-  defp get_person_id(assigns), do: assigns[:person][:id] || 0
-
   @impl true
   def mount(_params, _session, socket) do
     # subscribe to the channel
     if connected?(socket), do: AppWeb.Endpoint.subscribe(@stats_topic)
 
-    person_id = get_person_id(socket.assigns)
+    person_id = Person.get_person_id(socket.assigns)
     metrics = Stats.person_with_item_and_timer_count()
 
     {:ok,

test/app/person_test.exs

@@ -0,0 +1,29 @@
+defmodule App.PersonTest do
+  use ExUnit.Case
+  alias App.Person
+
+  @doc """
+  Test for `get_person_id/1`
+  """
+  describe "get_person_id/1" do
+    test "returns id when person is present in assigns" do
+      assigns = %{person: %{id: 1}}
+      assert Person.get_person_id(assigns) == 1
+    end
+
+    test "returns 0 when person is not present in assigns" do
+      assigns = %{}
+      assert Person.get_person_id(assigns) == 0
+    end
+
+    test "returns 0 when id is not present in person" do
+      assigns = %{person: %{}}
+      assert Person.get_person_id(assigns) == 0
+    end
+
+    test "returns 0 when id is nil in person" do
+      assigns = %{person: %{id: nil}}
+      assert Person.get_person_id(assigns) == 0
+    end
+  end
+end