Make Categories a predefined list

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

Allow null values for categories for now

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/mobilizon_web/uploaders/event.ex

@@ -0,0 +1,51 @@
+defmodule MobilizonWeb.Uploaders.Category do
+  @moduledoc """
+  Handles file uploads for categories
+  """
+  use Arc.Definition
+  use Arc.Ecto.Definition
+
+  # To add a thumbnail version:
+  @versions [:original, :thumb]
+  @extension_whitelist ~w(.jpg .jpeg .gif .png)
+
+  # Override the bucket on a per definition basis:
+  # def bucket do
+  #   :custom_bucket_name
+  # end
+
+  # Whitelist file extensions:
+  def validate({file, _}) do
+    file_extension = file.file_name |> Path.extname() |> String.downcase()
+    Enum.member?(@extension_whitelist, file_extension)
+  end
+
+  # Define a thumbnail transformation:
+  def transform(:thumb, _) do
+    {:convert, "-strip -thumbnail 250x250^ -gravity center -extent 250x250 -format png", :png}
+  end
+
+  # Override the persisted filenames:
+  def filename(version, {_file, %{title: title}}) do
+    "#{title}_#{version}"
+  end
+
+  # Override the storage directory:
+  def storage_dir(_, _) do
+    "uploads/event/"
+  end
+
+  # Provide a default URL if there hasn't been a file uploaded
+  # def default_url(version, scope) do
+  #   "/images/avatars/default_#{version}.png"
+  # end
+
+  # Specify custom headers for s3 objects
+  # Available options are [:cache_control, :content_disposition,
+  #    :content_encoding, :content_length, :content_type,
+  #    :expect, :expires, :storage_class, :website_redirect_location]
+  #
+  # def s3_object_headers(version, {file, scope}) do
+  #   [content_type: MIME.from_path(file.file_name)]
+  # end
+end