feat: link scheduling

lib/cesium_link/links.ex

@@ -64,7 +64,11 @@ defmodule CesiumLink.Links do
 
   """
   def list_unarchived_links_by_index do
-    Repo.all(from l in Link, where: l.archived == false, order_by: [asc: l.index])
+    Link
+    |> where([l], fragment("? <= now() OR ? IS NULL", l.publish_at, l.publish_at))
+    |> where([l], not l.archived)
+    |> order_by([l], asc: l.index)
+    |> Repo.all()
   end
 
   @doc """

lib/cesium_link/links/link.ex

@@ -5,7 +5,7 @@ defmodule CesiumLink.Links.Link do
   use CesiumLink.Schema
 
   @required_fields ~w(name emoji url attention edited_at)a
-  @optional_fields ~w(index archived visits)a
+  @optional_fields ~w(index archived visits publish_at)a
 
   schema "links" do
     field :archived, :boolean, default: false
@@ -16,6 +16,7 @@ defmodule CesiumLink.Links.Link do
     field :url, :string
     field :visits, :integer, default: 0
     field :edited_at, :utc_datetime
+    field :publish_at, :utc_datetime
 
     timestamps(type: :utc_datetime)
   end

lib/cesium_link_web/live/link_live/form_component.ex

@@ -19,6 +19,9 @@ defmodule CesiumLinkWeb.LinkLive.FormComponent do
         <.input field={@form[:emoji]} type="emoji" label="Emoji" />
         <.input field={@form[:url]} type="text" label="URL" />
         <.input field={@form[:attention]} type="checkbox" label="Attention" />
+        <%= if @action == :new do %>
+          <.input field={@form[:publish_at]} type="datetime-local" label="Publish At" />
+        <% end %>
         <:actions>
           <.button phx-disable-with="Saving...">Save Link</.button>
         </:actions>

priv/repo/migrations/20240918181533_add_link_scheduling.exs

@@ -0,0 +1,9 @@
+defmodule CesiumLink.Repo.Migrations.AddLinkScheduling do
+  use Ecto.Migration
+
+  def change do
+    alter table(:links) do
+      add :publish_at, :utc_datetime
+    end
+  end
+end