text: import os
  from flask import Flask
  from flask.json import JSONEncoder
  from flask_sqlalchemy import SQLAlchemy
  from flask_login import LoginManager
  from flask_openid import OpenID
  from flask_mail import Mail
  from flask_babel import Babel, lazy_gettext
  from config import basedir, ADMINS, MAIL_SERVER, MAIL_PORT, MAIL_USERNAME, \
      MAIL_PASSWORD
  from .momentjs import momentjs
  
  app = Flask(__name__)
  app.config.from_object('config')
  db = SQLAlchemy(app)
  lm = LoginManager()
  lm.init_app(app)
  lm.login_view = 'login'
  lm.login_message = lazy_gettext('Please log in to access this page.')
  oid = OpenID(app, os.path.join(basedir, 'tmp'))
  mail = Mail(app)
  babel = Babel(app)
  
  
  class CustomJSONEncoder(JSONEncoder):
      """This class adds support for lazy translation texts to Flask's
      JSON encoder. This is necessary when flashing translated texts."""
      def default(self, obj):
          from speaklater import is_lazy_string
          if is_lazy_string(obj):
              try:
                  return unicode(obj)  # python 2
              except NameError:
                  return str(obj)  # python 3
          return super(CustomJSONEncoder, self).default(obj)
  
  app.json_encoder = CustomJSONEncoder
  
  if not app.debug and MAIL_SERVER != '':
      import logging
      from logging.handlers import SMTPHandler
      credentials = None
      if MAIL_USERNAME or MAIL_PASSWORD:
          credentials = (MAIL_USERNAME, MAIL_PASSWORD)
      mail_handler = SMTPHandler((MAIL_SERVER, MAIL_PORT),
                                 'no-reply@' + MAIL_SERVER, ADMINS,
                                 'microblog failure', credentials)
      mail_handler.setLevel(logging.ERROR)
      app.logger.addHandler(mail_handler)
  
  if not app.debug and os.environ.get('HEROKU') is None:
      import logging
      from logging.handlers import RotatingFileHandler
      file_handler = RotatingFileHandler('tmp/microblog.log', 'a',
                                         1 * 1024 * 1024, 10)
      file_handler.setLevel(logging.INFO)
      file_handler.setFormatter(logging.Formatter(
          '%(asctime)s %(levelname)s: %(message)s [in %(pathname)s:%(lineno)d]'))
      app.logger.addHandler(file_handler)
      app.logger.setLevel(logging.INFO)
      app.logger.info('microblog startup')
  
  if os.environ.get('HEROKU') is not None:
      import logging
      stream_handler = logging.StreamHandler()
      app.logger.addHandler(stream_handler)
      app.logger.setLevel(logging.INFO)
      app.logger.info('microblog startup')
  
  app.jinja_env.globals['momentjs'] = momentjs
  
  from app import views, models
  