Behaviour of an Uploader.

Example

defmodule MyApp.Uploader do
  @moduledoc false
  @behaviour Uploadex.Uploader

  alias MyAppWeb.Endpoint

  @impl true
  def get_fields(%User{}), do: :photo
  def get_fields(%Company{}), do: [:photo]

  @impl true
  def default_opts(Uploadex.FileStorage), do: [base_path: :code.priv_dir(:my_app), base_url: Endpoint.url()]
  def default_opts(Uploadex.S3Storage), do: [bucket: "my_bucket", region: "sa-east-1", upload_opts: [acl: :public_read]]

  @impl true
  def storage(%User{id: id}, :photo), do: {Uploadex.FileStorage, directory: "/uploads/users/#{id}"}
  def storage(%Company{}, :photo), do: {Uploadex.S3Storage, directory: "/thumbnails"}

  # Optional:
  @impl true
  def accepted_extensions(%User{}, _field), do: ~w(.jpg .png)
  def accepted_extensions(_any, _any), do: :any
end