svg preview renderer

lib/zoeyscomputer_web/controllers/gist_preview_controller.ex

@@ -0,0 +1,30 @@
+defmodule ZoeyscomputerWeb.GistPreviewController do
+  use ZoeyscomputerWeb, :controller
+
+  require Logger
+  alias Zoeyscomputer.Gists
+
+  def show(conn, %{"id" => id}) do
+    gist = Gists.get_gist!(id)
+
+    {:ok, webp} = ZoeyscomputerWeb.GistLive.OgImage.get_webp(gist)
+
+    conn
+    |> put_resp_content_type("image/webp")
+    |> put_resp_header("cache-control", "public, max-age=300")
+    |> send_resp(200, webp)
+    |> halt()
+  end
+
+  def raw(conn, %{"id" => id}) do
+    gist = Gists.get_gist!(id)
+
+    webp = ZoeyscomputerWeb.GistLive.OgImage.generate_preview(gist)
+
+    conn
+    |> put_resp_content_type("image/svg+xml")
+    |> put_resp_header("cache-control", "public, max-age=300")
+    |> send_resp(200, webp)
+    |> halt()
+  end
+end