from flask import Blueprint, render_template, send_from_directory, abort, current_app
import os

file_format = Blueprint("file_format", __name__)

@file_format.route("/file_format")
def download_format():
    return render_template("ex_format.html", title="Download File Formats")


@file_format.route("/file_format/download/<filename>")
def download_excel_format(filename):

    download_folder = os.path.join(
        current_app.root_path, "static", "downloads/format"
    )

    file_path = os.path.join(download_folder, filename)

    if not os.path.exists(file_path):
        abort(404)

    return send_from_directory(
        directory=download_folder,
        path=filename,
        as_attachment=True
    )