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ami lib uploaders assignment_uploader.ex
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lib/uploaders/assignment_uploader.ex

defmodule Ami.AssignmentUploader do
use Arc.Definition
# Include ecto support (requires package arc_ecto installed):
use Arc.Ecto.Definition
@acl :public_read_write
# https://s3-eu-west-1.amazonaws.com/ami-aws-staging/uploads/enrollment/assignments/87874/AllCoursePeriodReport_20170517.xls
# https://ami-aws-staging.s3.amazonaws.com/uploads/enrollment/assignments/87874/115/AllCoursePeriodReport_20170517.xls?v=63682932142
@versions [:original]
# To add a thumbnail version:
# @versions [:original, :thumb]
# Whitelist file extensions:
# def validate({file, _}) do
# ~w(.jpg .jpeg .gif .png) |> Enum.member?(Path.extname(file.file_name))
# 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, _) do
# version
# end
# Override the storage directory:
def storage_dir(_version, {_file, scope}) do
"uploads/enrollment/assignments/#{scope.enrollment_id}"
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: Plug.MIME.path(file.file_name)]
# end
end