add static analysis tool Dialyzer

lib/plantid_discord_bot/cogs/plantnet.ex

@@ -41,7 +41,7 @@ defmodule PlantIdDiscordBot.Cog.PlantNet do
     attachment_urls = get_attachment_urls(interaction)
     original_images = get_original_images(attachment_urls)
 
-    # FUNCTION  return image filename list as a list of images to delete
+    # FUNCTION return image filename list as a list of images to delete
     saved_images =
       try do
         File.download_and_save_files!(attachment_urls)
@@ -99,7 +99,7 @@ defmodule PlantIdDiscordBot.Cog.PlantNet do
         })
     end
 
-    # TODO delete saved images
+    # TODO delete saved images, make into a task
   end
 
   defp get_attachment_urls(interaction) do

lib/plantid_discord_bot/file_server/file.ex

@@ -56,8 +56,9 @@ defmodule PlantIdDiscordBot.FileServer.File do
     |> File.read()
   end
 
-  @spec delete_file!(String.t()) :: :ok
-  def delete_file!(filename) do
+  # TODO make into a task for async deletion
+  @spec delete_files!([String.t()]) :: :ok
+  def delete_files!(filename) do
     File.rm!(Path.join(@image_path, filename))
   end