Add the add edition button for Book Show LiveView.

lib/decentralised_book_index_web/live/book_live/edit.ex

@@ -11,14 +11,18 @@ defmodule DecentralisedBookIndexWeb.BookLive.Edit do
       current_user={@current_user}
       action={@live_action}
       book={@book}
+      alternative_book_id={@alternative_book_id}
     />
     """
   end
 
   @impl true
-  def mount(_params, _session, socket) do
+  def mount(params, _session, socket) do
+    alternative_book_id = Map.get(params, "alternative_book_id", nil)
+
     {:ok,
      socket
+     |> assign(:alternative_book_id, alternative_book_id)
      |> assign_new(:current_user, fn -> nil end)}
   end
 

lib/decentralised_book_index_web/live/book_live/form_component.ex

@@ -1,6 +1,8 @@
 defmodule DecentralisedBookIndexWeb.BookLive.FormComponent do
   use DecentralisedBookIndexWeb, :live_component
 
+  alias DecentralisedBookIndex.Metadata
+
   @impl true
   def render(assigns) do
     ~H"""
@@ -340,7 +342,15 @@ defmodule DecentralisedBookIndexWeb.BookLive.FormComponent do
 
   defp notify_parent(msg), do: send(self(), {__MODULE__, msg})
 
-  defp assign_form(%{assigns: %{book: book}} = socket) do
+  defp assign_form(%{assigns: %{book: book, alternative_book_id: alternative_book_id}} = socket) do
+    alternative_edition_id =
+      if alternative_book_id == nil do
+        nil
+      else
+        alternative_book = Metadata.get_book_by_id!(alternative_book_id)
+        alternative_book.book_editions_registry_id
+      end
+
     form =
       if book do
         book =
@@ -349,15 +359,26 @@ defmodule DecentralisedBookIndexWeb.BookLive.FormComponent do
 
         AshPhoenix.Form.for_update(book, :update, as: "book", actor: socket.assigns.current_user)
       else
-        AshPhoenix.Form.for_create(DecentralisedBookIndex.Metadata.Book, :create,
-          as: "book",
-          actor: socket.assigns.current_user
-        )
+        form =
+          AshPhoenix.Form.for_create(DecentralisedBookIndex.Metadata.Book, :create,
+            as: "book",
+            actor: socket.assigns.current_user
+          )
+          |> set_book_edition_registry_id(alternative_edition_id)
       end
 
     assign(socket, form: to_form(form))
   end
 
+  defp set_book_edition_registry_id(form, alternative_edition_id) do
+    if alternative_edition_id != nil do
+      form
+      |> AshPhoenix.Form.update_params(&Map.put(&1, "book_editions_registry_id", alternative_edition_id))
+    else
+      form
+    end
+  end
+
   defp patch_url(action, book_id) do
     case action do
       :edit -> ~p"/books/#{book_id}"

lib/decentralised_book_index_web/live/book_live/show.ex

@@ -15,11 +15,18 @@ defmodule DecentralisedBookIndexWeb.BookLive.Show do
 
       <:actions>
         <%= if @current_user != nil and Role.can_moderate?(@current_user.role) do %>
-          <.link patch={~p"/books/#{@book}/edit"}>
-            <.edit_button>
-              Edit
-            </.edit_button>
-          </.link>
+          <div class="flex flex-row gap-2">
+            <.link patch={~p"/books/#{@book}/new"}>
+              <.add_button>
+                Edition
+              </.add_button>
+            </.link>
+            <.link patch={~p"/books/#{@book}/edit"}>
+              <.edit_button>
+                Edit
+              </.edit_button>
+            </.link>
+          </div>
         <% end %>
       </:actions>
     </.header>

lib/decentralised_book_index_web/router.ex

@@ -37,6 +37,7 @@ defmodule DecentralisedBookIndexWeb.Router do
 
     ash_authentication_live_session :moderator_authenticated_routes, on_mount: {DecentralisedBookIndexWeb.LiveUserAuth, :moderator_required} do
       live "/books/new", BookLive.Edit, :new
+      live "/books/:alternative_book_id/new", BookLive.Edit, :new
       live "/books/:id/edit", BookLive.Edit, :edit
 
       live "/authors/new", AuthorLive.Edit, :new