feat: enhance screenshot functionality and improve route handling

- Updated generate_image function in ScreenshotQueue to accept optional parameters.
- Added screenshot function in Admin module to facilitate screenshot uploads.
- Changed take_and_upload_screenshot function to public and improved URL construction for better path handling.

Author: zcesur

lib/algora/admin/admin.ex

@@ -16,6 +16,8 @@ defmodule Algora.Admin do
 
   require Logger
 
+  def screenshot(path), do: AlgoraWeb.OGImageController.take_and_upload_screenshot([path])
+
   def alert(message) do
     email_job =
       Algora.Activities.SendEmail.changeset(%{

lib/algora/screenshot_queue.ex

@@ -10,7 +10,7 @@ defmodule Algora.ScreenshotQueue do
     GenServer.start_link(__MODULE__, :ok, name: __MODULE__)
   end
 
-  def generate_image(url, opts) do
+  def generate_image(url, opts \\ []) do
     GenServer.call(__MODULE__, {:generate_image, url, opts}, opts[:timeout] || @timeout)
   end
 

lib/algora_web/controllers/og_image_controller.ex

@@ -71,11 +71,11 @@ defmodule AlgoraWeb.OGImageController do
     conn |> put_status(:not_found) |> text("Not found")
   end
 
-  defp take_and_upload_screenshot(path) do
+  def take_and_upload_screenshot(path) do
     dir = Path.join([System.tmp_dir!(), "og"] ++ path)
     File.mkdir_p!(dir)
     filepath = Path.join(dir, "og.png")
-    url = url(~p"/#{path}?screenshot")
+    url = Path.join([AlgoraWeb.Endpoint.url() | path]) <> "?screenshot"
 
     case ScreenshotQueue.generate_image(url, Keyword.put(@opts, :path, filepath)) do
       {:ok, _path} ->