Enable chat for artists

lib/music_library/artist_chat.ex

@@ -0,0 +1,44 @@
+defmodule MusicLibrary.ArtistChat do
+  @behaviour MusicLibrary.Chat
+
+  alias MusicLibrary.Artists.ArtistInfo
+
+  @impl true
+  def stream_response(messages, {artist, artist_info}, callback) do
+    instructions = build_instructions(artist, artist_info)
+
+    OpenAI.chat_stream(messages, on_chunk: callback, instructions: instructions)
+  end
+
+  defp build_instructions(artist, artist_info) do
+    context = build_context(artist, artist_info)
+
+    """
+    You are a knowledgeable music assistant. Answer questions about the artist \
+    the user is currently viewing. Use the provided artist information as your \
+    primary reference, and use web search to find additional up-to-date \
+    information when helpful. Be concise and accurate. When unsure, say so.
+
+    Artist information:
+    #{context}
+    """
+  end
+
+  defp build_context(artist, artist_info) do
+    country = ArtistInfo.country(artist_info)
+    description = ArtistInfo.wikipedia_description(artist_info)
+    summary = ArtistInfo.wikipedia_summary(artist_info)
+
+    parts =
+      [
+        {"Name", artist.name},
+        {"Country", country.name},
+        {"Description", description},
+        {"Biography", summary}
+      ]
+      |> Enum.reject(fn {_label, value} -> value in [nil, ""] end)
+      |> Enum.map_join("\n", fn {label, value} -> "#{label}: #{value}" end)
+
+    parts
+  end
+end

lib/music_library/chat.ex

@@ -0,0 +1,7 @@
+defmodule MusicLibrary.Chat do
+  @callback stream_response(
+              messages :: list(map()),
+              context :: term(),
+              callback :: (String.t() -> any())
+            ) :: :ok | {:error, term()}
+end

lib/music_library/record_chat.ex

@@ -1,7 +1,10 @@
 defmodule MusicLibrary.RecordChat do
+  @behaviour MusicLibrary.Chat
+
   alias MusicLibrary.Records.Record
 
-  def stream_response(messages, record, embedding_text, callback) do
+  @impl true
+  def stream_response(messages, {record, embedding_text}, callback) do
     instructions = build_instructions(record, embedding_text)
 
     OpenAI.chat_stream(messages, on_chunk: callback, instructions: instructions)

lib/music_library_web/components/chat.ex

@@ -1,9 +1,8 @@
-defmodule MusicLibraryWeb.Components.RecordChat do
+defmodule MusicLibraryWeb.Components.Chat do
   use MusicLibraryWeb, :live_component
 
   require Logger
 
-  alias MusicLibrary.RecordChat
   alias MusicLibraryWeb.Markdown
 
   def open(id), do: Fluxon.open_dialog(id)
@@ -55,7 +54,7 @@ defmodule MusicLibraryWeb.Components.RecordChat do
       >
         <div class="flex items-center gap-2 pb-4 border-b border-zinc-200 dark:border-zinc-700">
           <h2 class="text-lg font-semibold text-zinc-900 dark:text-zinc-100">
-            {gettext("Chat about %{title}", title: @record.title)}
+            {gettext("Chat about %{title}", title: @title)}
           </h2>
           <.button
             :if={@messages != []}
@@ -82,10 +81,7 @@ defmodule MusicLibraryWeb.Components.RecordChat do
               name="hero-chat-bubble-left-right"
               class="size-12 mb-4 text-zinc-300 dark:text-zinc-600"
             />
-            <p class="text-sm font-medium">{gettext("Ask anything about this album")}</p>
-            <p class="text-xs mt-1">
-              {gettext("e.g. \"What genre is this?\", \"Tell me about the artists\"")}
-            </p>
+            <p class="text-sm font-medium">{@empty_prompt}</p>
           </div>
 
           <div
@@ -144,7 +140,7 @@ defmodule MusicLibraryWeb.Components.RecordChat do
             <.input
               name="message"
               value=""
-              placeholder={gettext("Ask about this album...")}
+              placeholder={@placeholder}
               class="flex-1"
               disabled={@loading}
               autocomplete="off"
@@ -215,11 +211,11 @@ defmodule MusicLibraryWeb.Components.RecordChat do
     user_message = %{role: "user", content: String.trim(text)}
 
     messages = socket.assigns.messages ++ [user_message]
-    record = socket.assigns.record
-    embedding_text = socket.assigns.embedding_text
+    chat_module = socket.assigns.chat_module
+    chat_context = socket.assigns.chat_context
 
     Task.Supervisor.start_child(MusicLibrary.TaskSupervisor, fn ->
-      case RecordChat.stream_response(messages, record, embedding_text, fn chunk ->
+      case chat_module.stream_response(messages, chat_context, fn chunk ->
              Phoenix.LiveView.send_update(parent_pid, __MODULE__,
                id: component_id,
                chunk: chunk
@@ -232,7 +228,7 @@ defmodule MusicLibraryWeb.Components.RecordChat do
           )
 
         {:error, reason} ->
-          Logger.error("RecordChat streaming error: #{reason}")
+          Logger.error("Chat streaming error: #{reason}")
 
           Phoenix.LiveView.send_update(parent_pid, __MODULE__,
             id: component_id,

lib/music_library_web/live/artist_live/show.html.heex

@@ -21,6 +21,18 @@
                 data-slot="icon"
               />
             </.button>
+            <.button
+              variant="soft"
+              phx-click={MusicLibraryWeb.Components.Chat.open("artist-chat-sheet")}
+            >
+              <span class="sr-only">{gettext("Chat about artist")}</span>
+              <.icon
+                name="hero-chat-bubble-left-right"
+                class="h-5 w-5"
+                aria-hidden="true"
+                data-slot="icon"
+              />
+            </.button>
             <.dropdown id={"actions-#{@artist.musicbrainz_id}"} placement="bottom-end">
               <:toggle>
                 <.button variant="soft">
@@ -332,6 +344,17 @@
     musicbrainz_id={@artist.musicbrainz_id}
   />
 
+  <.live_component
+    id="artist-chat"
+    sheet_id="artist-chat-sheet"
+    module={MusicLibraryWeb.Components.Chat}
+    title={@artist.name}
+    chat_module={MusicLibrary.ArtistChat}
+    chat_context={{@artist, @artist_info}}
+    placeholder={gettext("Ask about this artist...")}
+    empty_prompt={gettext("Ask anything about this artist")}
+  />
+
   <.structured_modal
     :if={@live_action == :edit}
     id="artist-info-modal"

lib/music_library_web/live/collection_live/show.html.heex

@@ -28,7 +28,7 @@
             </.button>
             <.button
               variant="soft"
-              phx-click={MusicLibraryWeb.Components.RecordChat.open("record-chat-sheet")}
+              phx-click={MusicLibraryWeb.Components.Chat.open("record-chat-sheet")}
             >
               <span class="sr-only">{gettext("Chat about album")}</span>
               <.icon
@@ -342,9 +342,12 @@
   <.live_component
     id="record-chat"
     sheet_id="record-chat-sheet"
-    module={MusicLibraryWeb.Components.RecordChat}
-    record={@record}
-    embedding_text={@embedding_text}
+    module={MusicLibraryWeb.Components.Chat}
+    title={@record.title}
+    chat_module={MusicLibrary.RecordChat}
+    chat_context={{@record, @embedding_text}}
+    placeholder={gettext("Ask about this album...")}
+    empty_prompt={gettext("Ask anything about this album")}
   />
 
   <.structured_modal

lib/music_library_web/live/wishlist_live/show.html.heex

@@ -16,7 +16,7 @@
           <.button_group>
             <.button
               variant="soft"
-              phx-click={MusicLibraryWeb.Components.RecordChat.open("record-chat-sheet")}
+              phx-click={MusicLibraryWeb.Components.Chat.open("record-chat-sheet")}
             >
               <span class="sr-only">{gettext("Chat about album")}</span>
               <.icon
@@ -307,9 +307,12 @@
   <.live_component
     id="record-chat"
     sheet_id="record-chat-sheet"
-    module={MusicLibraryWeb.Components.RecordChat}
-    record={@record}
-    embedding_text={@embedding_text}
+    module={MusicLibraryWeb.Components.Chat}
+    title={@record.title}
+    chat_module={MusicLibrary.RecordChat}
+    chat_context={{@record, @embedding_text}}
+    placeholder={gettext("Ask about this album...")}
+    empty_prompt={gettext("Ask anything about this album")}
   />
 
   <.structured_modal