Update uploader.ex

lib/nulla/uploader.ex

@@ -1,25 +1,64 @@
 defmodule Nulla.Uploader do
-  def upload(%Plug.Upload{path: temp_path, filename: original_name}) do
+  alias Nulla.Snowflake
+  alias Nulla.Models.MediaAttachment
+
+  @upload_base "priv/static"
+  @upload_prefix "system"
+
+  def upload(
+        %Plug.Upload{path: temp_path, filename: original_name},
+        dir,
+        description,
+        domain
+      ) do
     {:ok, binary} = File.read(temp_path)
-    hash = :crypto.hash(:sha1, binary) |> Base.encode16(case: :lower)
-    file_type = Path.extname(original_name)
+    ext = Path.extname(original_name)
+    mimetype = MIME.type(ext)
 
-    segments =
-      hash
-      |> String.slice(0, 15)
-      |> String.codepoints()
+    type =
+      cond do
+        mimetype =~ "image" -> "Image"
+        mimetype =~ "video" -> "Video"
+        mimetype =~ "audio" -> "Audio"
+        true -> "Document"
+      end
+
+    filename = Base.encode16(:crypto.strong_rand_bytes(8), case: :lower) <> ext
+
+    media_attachment_id = Snowflake.next_id()
+
+    relative_path =
+      Path.join([
+        @upload_prefix,
+        dir,
+        partition_id(media_attachment_id),
+        "original",
+        filename
+      ])
+
+    full_path = Path.join(@upload_base, relative_path)
+
+    full_path |> Path.dirname() |> File.mkdir_p!()
+
+    File.write!(full_path, binary)
+
+    MediaAttachment.create_media_attachment(%{
+      id: media_attachment_id,
+      type: type,
+      mediaType: mimetype,
+      url: "https://#{domain}/#{relative_path}",
+      name: description,
+      width: 1,
+      height: 1
+    })
+  end
+
+  defp partition_id(id) do
+    id
+    |> Integer.to_string()
+    |> String.pad_leading(18, "0")
+    |> String.graphemes()
     |> Enum.chunk_every(3)
-      |> Enum.map(&Enum.join/1)
-
-    filename = String.slice(hash, 15..-1//1) <> file_type
-    relative_path = Path.join(segments) <> "/" <> filename
-
-    dest_path = Path.join(["priv/static/files", relative_path])
-
-    dest_path |> Path.dirname() |> File.mkdir_p!()
-
-    File.write!(dest_path, binary)
-
-    relative_path
+    |> Enum.map_join("/", &Enum.join/1)
   end
 end