Add JSON API support for user data exports (#2786)

app/controllers/users/data_exports_controller.rb

@@ -7,11 +7,20 @@ class Users::DataExportsController < ApplicationController
   CURRENT_EXPORT_LIMIT = 10
 
   def show
+    respond_to do |format|
+      format.html
+      format.json { @export ? render(:show) : head(:not_found) }
+    end
   end
 
   def create
-    @user.data_exports.create!(account: Current.account).build_later
-    redirect_to @user, notice: "Export started. You'll receive an email when it's ready."
+    @export = @user.data_exports.create!(account: Current.account)
+    @export.build_later
+
+    respond_to do |format|
+      format.html { redirect_to @user, notice: "Export started. You'll receive an email when it's ready." }
+      format.json { render :show, status: :created }
+    end
   end
 
   private
@@ -28,6 +37,7 @@ class Users::DataExportsController < ApplicationController
     end
 
     def set_export
-      @export = @user.data_exports.completed.find_by(id: params[:id])
+      scope = request.format.json? ? @user.data_exports : @user.data_exports.completed
+      @export = scope.find_by(id: params[:id])
     end
 end

app/views/users/data_exports/show.json.jbuilder

@@ -0,0 +1,6 @@
+json.(@export, :id, :status)
+json.created_at @export.created_at.utc
+
+if @export.completed? && @export.file.attached?
+  json.download_url rails_blob_url(@export.file, disposition: "attachment")
+end