action-center-platform/app/controllers/admin/s3_uploads_controller.rb

class Admin::S3UploadsController < Admin::ApplicationController
  # GET /admin/source_files
  # GET /admin/source_files.json
  def index
    if params[:f].present?
      source_files = SourceFile.where("LOWER(file_name) LIKE ?", "%#{params[:f]}%".downcase)
    else
      source_files = SourceFile.limit(3)
    end

    source_files = source_files.order(created_at: :desc)

    respond_to do |format|
      format.html { render partial: "table", locals: { source_files: source_files } }
    end
  end

  # POST /admin/source_files
  # POST /admin/source_files.json
  def create
    # this line allows for compatibility with `ProtectedAttributes` or `StrongParameters`
    parameters = S3CorsFileupload.active_record_protected_attributes? ? params[:source_file] : params.require(:source_file).permit(:url, :bucket, :key)
    @source_file = SourceFile.new(parameters)
    respond_to do |format|
      if @source_file.save
        format.html {
          render json: @source_file.to_jq_upload,
          content_type: "text/html",
          layout: false
        }
        format.json { render json: @source_file.to_jq_upload, status: :created }
      else
        format.html { render "new" }
        format.json { render json: @source_file.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /admin/source_files/1
  # DELETE /admin/source_files/1.json
  def destroy
    @source_file = SourceFile.find(params[:id])
    @source_file.destroy

    respond_to do |format|
      format.html { redirect_to source_files_url }
      format.json { head :no_content }
      format.xml { head :no_content }
    end
  end

  # used for s3_uploader on the javascript of the upload to gallery section
  # for /admin/action_page/new
  # GET /admin/source_files/generate_key
  def generate_key
    uid = SecureRandom.uuid.gsub(/-/, "")

    render json: {
      key: "uploads/#{uid}/#{params[:filename]}",
      success_action_redirect: "/"
    }
  end
end