#!/usr/bin/env python3
"""
The main Flask application for serving up aggregated RSS feed entries.
"""
import os

from flask import Flask, render_template, session, request

import config
import database

app = Flask(__name__)

def read_secret_key():
	if os.path.exists("secret_key"):
		with open("secret_key", "rb") as file:
			secret_key = file.read()
	else:
		secret_key = os.urandom(64)
		with open("secret_key", "wb") as file:
			file.write(secret_key)
	app.secret_key = secret_key
read_secret_key()

@app.route("/")
def index():
	"""
	The index page.
	"""
	feeds = []
	for feed_url in config.FEEDS:
		feeds.append(database.get_feed(feed_url))
	style_sheet = session.get("style_sheet", "ss.css")
	return render_template("index.html", **locals())


@app.route("/set_session")
def set_session():
	"""
	Allows certain values to be set in the client's session.
	"""
	style_sheet = request.args.get("style_sheet")
	if style_sheet == "ss.css":
		session["style_sheet"] = "ss.css"
	elif style_sheet == "ss-dark.css":
		session["style_sheet"] = "ss-dark.css"
	return "true"