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#! /usr/bin/env python
#-*- coding: utf-8 -*-
from threading import Thread
from functools import wraps
from flask import g, redirect, url_for, flash
from flask.ext.babel import gettext
from flask.ext.login import login_required
from pyaggr3g470r.models import Feed
from pyaggr3g470r.lib.exceptions import PyAggError
def async(f):
"""
This decorator enables to launch a task (for examle sending an email or
indexing the database) in background.
This prevent the server to freeze.
"""
def wrapper(*args, **kwargs):
thr = Thread(target=f, args=args, kwargs=kwargs)
thr.start()
return wrapper
def feed_access_required(func):
"""
This decorator enables to check if a user has access to a feed.
The administrator of the platform is able to access to the feeds
of a normal user.
"""
@wraps(func)
def decorated(*args, **kwargs):
if kwargs.get('feed_id', None) is not None:
feed = Feed.query.filter(Feed.id == kwargs.get('feed_id', None)).first()
if feed is not None and (feed.subscriber.id == g.user.id or g.user.is_admin()):
return func(*args, **kwargs)
flash("This feed do not exist.", "danger")
return redirect(url_for('home'))
else:
return func(*args, **kwargs)
return decorated
def handle_pyagg_error(func):
@wraps(func)
def wrapper(*args, **kwargs):
try:
return func(*args, **kwargs)
except PyAggError, error:
flash(gettext(error.default_message), 'warning')
return redirect(url_for('home'))
return wrapper
def pyagg_default_decorator(func):
@login_required
@handle_pyagg_error
@wraps(func)
def wrapper(*args, **kwargs):
return func(*args, **kwargs)
return wrapper
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