Update the Book Show to show the Authors with links.

lib/decentralised_book_index_web/live/book_live/show.ex

@@ -9,7 +9,9 @@ defmodule DecentralisedBookIndexWeb.BookLive.Show do
     ~H"""
     <.header>
       {@book.title}
-      <:subtitle>{@authors_string}</:subtitle>
+      <:subtitle>
+        <.authors book={@book} />
+      </:subtitle>
 
       <:actions>
         <%= if @current_user != nil and Role.can_moderate?(@current_user.role) do %>
@@ -65,32 +67,44 @@ defmodule DecentralisedBookIndexWeb.BookLive.Show do
   @impl true
   def handle_params(%{"id" => id}, _, socket) do
     book = Ash.get!(Metadata.Book, id, actor: socket.assigns.current_user, load: [:author_roles])
-    author_roles = Metadata.get_author_roles_by_book_id!(book.id, load: [:author])
-    authors_string = Enum.reduce(
-      author_roles, "",
-      fn author_role, acc ->
-        if acc != "" do
-          acc <> ", "
-        else
-          acc
-        end
-        <>
-        if author_role.role == "" do
-          "#{author_role.author.name}"
-        else
-          "#{author_role.author.name} (#{author_role.role})"
-        end
-      end
-    )
 
     {:noreply,
      socket
      |> assign(:page_title, page_title(socket.assigns.live_action))
      |> assign(:book, book)
-     |> assign(:authors_string, authors_string)
+     |> assign(:alternative_editions, alternative_editions)
     }
   end
 
   defp page_title(:show), do: "Show Book"
   defp page_title(:edit), do: "Edit Book"
+
+  attr :book, :map, required: true
+
+  def authors(assigns) do
+    author_roles = Metadata.get_author_roles_by_book_id!(assigns.book.id, load: [:author])
+    author_count = length(author_roles)
+    authors_string =
+      author_roles
+      |> Enum.map(fn author_role ->
+        if author_role.role == "" do
+          {"#{author_role.author.name}", author_role.author.id}
+        else
+          {"#{author_role.author.name} (#{author_role.role})", author_role.author.id}
+        end
+      end)
+      |> Enum.zip(1..author_count)
+
+    assigns =
+      assigns
+      |> assign(:authors_string, authors_string)
+      |> assign(:author_count, author_count)
+
+    ~H"""
+    <%= for {{name, id}, index} <- @authors_string do %>
+      <.link navigate={~p"/authors/#{id}/"} class="hover:underline">
+        {name}</.link><%= if {index} != {@author_count} do %>,<% end %>
+    <% end %>
+    """
+  end
 end