from os import path
from google.appengine.api import users
from google.appengine.ext import db, webapp
from google.appengine.ext.webapp.template import render
from google.appengine.ext.webapp.util import run_wsgi_app

class Greeting(db.Model):
    author = db.UserProperty()
    content = db.StringProperty(multiline=True)
    date = db.DateTimeProperty(auto_now_add=True)

class MainHandler(webapp.RequestHandler):
    def get(self):
        user = users.get_current_user()
        if not user:
            self.redirect(users.create_login_url(self.request.uri))
            return
        greetings = Greeting.all().order('-date').fetch(10)
        context = { 'user': user, 'greetings': greetings, }
        tmpl = path.join(path.dirname(__file__), 'index.html')
        self.response.out.write(render(tmpl, context))

class GuestBook(webapp.RequestHandler):
    def post(self):
        greeting = Greeting()
        user = users.get_current_user()
        if user:
            greeting.author = user
        greeting.content = self.request.get('content')
        greeting.put()
        self.redirect('/')


application = webapp.WSGIApplication([ ('/', MainHandler), ('/sign', GuestBook), ], debug=True)

def main():
    run_wsgi_app(application)

if __name__ == '__main__': main