From 02a34694e4b7e5afede05e836689bdf8395478e2 Mon Sep 17 00:00:00 2001
From: KKlochko <KKlochko@protonmail.com>
Date: Tue, 3 Jun 2025 19:32:17 +0300
Subject: [PATCH] Update the Author Show LiveView to show their books.

---
 lib/decentralised_book_index/metadata/book.ex | 10 ++++--
 .../live/author_live/show.ex                  | 31 +++++++++++++++++--
 2 files changed, 36 insertions(+), 5 deletions(-)

diff --git a/lib/decentralised_book_index/metadata/book.ex b/lib/decentralised_book_index/metadata/book.ex
index ae58a53..5a3bec0 100644
--- a/lib/decentralised_book_index/metadata/book.ex
+++ b/lib/decentralised_book_index/metadata/book.ex
@@ -179,11 +179,17 @@ defmodule DecentralisedBookIndex.Metadata.Book do
       prepare fn query, context ->
         author = query.arguments.author
 
-        {:ok, author_ids} = Metadata.get_author_ids(author)
+        author_ids =
+	  case Metadata.get_author_ids(author) do
+	    {:ok, ids} -> ids
+	    {:error, _error} -> []
+	  end
 
-        Metadata.Book
+        query
         |> Ash.Query.filter(expr(exists(author_roles, author_id in ^author_ids)))
       end
+
+      pagination offset?: true, default_limit: 10
     end
 
     read :search do
diff --git a/lib/decentralised_book_index_web/live/author_live/show.ex b/lib/decentralised_book_index_web/live/author_live/show.ex
index 3ea2c24..ae77e7b 100644
--- a/lib/decentralised_book_index_web/live/author_live/show.ex
+++ b/lib/decentralised_book_index_web/live/author_live/show.ex
@@ -2,6 +2,7 @@ defmodule DecentralisedBookIndexWeb.AuthorLive.Show do
   use DecentralisedBookIndexWeb, :live_view
 
   alias DecentralisedBookIndex.Accounts.Role
+  alias DecentralisedBookIndex.Metadata
 
   @impl true
   def render(assigns) do
@@ -96,6 +97,19 @@ defmodule DecentralisedBookIndexWeb.AuthorLive.Show do
       </ul>
     <% end %>
 
+    <%= if not Enum.empty?(@page.results) do %>
+      <h2 class="mb-2 text-lg font-semibold text-gray-900 dark:text-white mt-10">
+        Books
+      </h2>
+      <div class="flex flex-wrap flex-[3_1_auto]">
+        <%= for book <- @page.results do %>
+          <.book_card book={book} current_user={@current_user} />
+        <% end %>
+      </div>
+
+      <.pagination endpoint={~p"/authors/#{@author}"} page={@page} page_params={@page_params} params={@params} />
+    <% end %>
+
     <.back navigate={~p"/authors"}>Back to authors</.back>
     """
   end
@@ -106,19 +120,30 @@ defmodule DecentralisedBookIndexWeb.AuthorLive.Show do
   end
 
   @impl true
-  def handle_params(%{"id" => id}, _, socket) do
+  def handle_params(%{"id" => id} = params, _, socket) do
     author =
-      Ash.get!(DecentralisedBookIndex.Metadata.Author, id,
+      Ash.get!(Metadata.Author, id,
         load: [:dbi_server],
         actor: socket.assigns.current_user
       )
 
-    alternative_names = DecentralisedBookIndex.Metadata.get_author_alternative_names!(author)
+    alternative_names = Metadata.get_author_alternative_names!(author)
+
+    page_params = AshPhoenix.LiveView.page_from_params(params, 10)
+    page =
+      Metadata.get_author_books!(author,
+        load: [:brief_description],
+        page: page_params ++ [count: true],
+        actor: socket.assigns.current_user
+      )
 
     {:noreply,
      socket
      |> assign(:page_title, page_title(socket.assigns.live_action))
      |> assign(:author, author)
+     |> assign(:page_params, page_params)
+     |> assign(:page, page)
+     |> assign(:params, params)
      |> assign(:alternative_names, alternative_names)}
   end