root/gapp/pangramming/pangramming.py

import cgi

import wsgiref.handlers

from google.appengine.api import users
from google.appengine.ext import webapp
from google.appengine.ext import db

from google.appengine.ext.webapp import template

from utils import is_pangram, strip_tags, bare_pangram

class Pangram(db.Model):
    id = db.IntegerProperty()
    content = db.StringProperty()
    bare_content = db.StringProperty()
    length = db.IntegerProperty()
    author = db.StringProperty()
    created = db.DateTimeProperty(auto_now_add=True)

class MainPage(webapp.RequestHandler):
    def get(self):
        user = users.get_current_user()
        if not user: 
            self.redirect(users.create_login_url(self.request.uri))
            return 

        pangrams = Pangram.all().order('-created')[:10]
        self.response.out.write(
            template.render('templates/pangram/home.html', 
                            {'pangrams': pangrams,
                             'user': user}))

class DetailPage(webapp.RequestHandler):
    def get(self, id):
        pangram = Pangram.get_by_id(int(id))
        self.response.out.write(
            template.render('templates/pangram/detail.html', 
                            {'pangram': pangram}))

class SavePage(webapp.RequestHandler):
    def post(self):
        pangram = self.request.get('pangram')
        author = self.request.get('author')

        if not author:
            raise RuntimeError('No author, WTF?')

        author = strip_tags(author)

        if is_pangram(pangram):
            p = Pangram()
            try:
                latest_pangram = Pangram.all().order('-id')[0]
                p.id = latest_pangram.id + 1
            except IndexError:
                p.id = 1

            p.content, p.author = pangram, author
            p.bare_content = bare_pangram(pangram)
            p.length = len(p.bare_content)
            p.put()
            self.redirect('/?saved')
        else:
            self.response.out.write(
                'Sorry, your pangram is not valid.')

def main():
    application = webapp.WSGIApplication(
        [('/', MainPage),
         ('/save/', SavePage),
         ('/(?P<id>\d+)/', DetailPage),
         ],
        debug=True)
    wsgiref.handlers.CGIHandler().run(application)

if __name__ == "__main__":
    main()