text: import jwt
  from datetime import datetime
  from app import db, loginm
  from werkzeug.security import generate_password_hash, check_password_hash
  from flask import current_app
  from flask_login import UserMixin
  from hashlib import _hashlib
  from time import time
  from app.search import add_to_index, remove_from_index, query_index
  
  
  class SearchableMixin(object):
      @classmethod
      def search(cls, expression, page, per_page):
          ids, total = query_index(cls.__tablename__, expression, page, per_page)
          if total == 0:
              return cls.query.filter_by(id=0), 0
          when = []
          for i in range(len(ids)):
              when.append((ids[i], i))
          return cls.query.filter(cls.id.in_(ids)).order_by(
              db.case(when, value=cls.id)), total
  
      @classmethod
      def before_commit(cls, session):
          session._changes = {
              'add': list(session.new),
              'update': list(session.dirty),
              'delete': list(session.deleted)
          }
  
      @classmethod
      def after_commit(cls, session):
          for obj in session._changes['add']:
              if isinstance(obj, SearchableMixin):
                  add_to_index(obj.__tablename__, obj)
          for obj in session._changes['update']:
              if isinstance(obj, SearchableMixin):
                  add_to_index(obj.__tablename__, obj)
          for obj in session._changes['delete']:
              if isinstance(obj, SearchableMixin):
                  remove_from_index(obj.__tablename__, obj)
          session._changes = None
  
      @classmethod
      def reindex(cls):
          for obj in cls.query:
              add_to_index(cls.__tablename__, obj)
  
  
  db.event.listen(db.session, 'before_commit', SearchableMixin.before_commit)
  db.event.listen(db.session, 'after_commit', SearchableMixin.after_commit)
  
  
  @loginm.user_loader
  def load_user(id):  # pylint: disable=redefined-builtin
      return User.query.get(int(id))
  
  
  # Database models
  followers = db.Table(
      'followers',
      db.Column('follower_id', db.Integer, db.ForeignKey('user.id')),
      db.Column('followed_id', db.Integer, db.ForeignKey('user.id'))
  )
  
  
  class User(UserMixin, db.Model):
      id = db.Column(db.Integer, primary_key=True)
      name = db.Column(db.String(120), index=True)
      username = db.Column(db.String(64), index=True, unique=True)
      email = db.Column(db.String(120), index=True, unique=True)
      password_hash = db.Column(db.String(128))
      posts = db.relationship('Post', backref='author', lazy='dynamic')
      followed = db.relationship(
          'User', secondary=followers,
          primaryjoin=(followers.c.follower_id == id),
          secondaryjoin=(followers.c.followed_id == id),
          backref=db.backref('followers', lazy='dynamic'), lazy='dynamic')
  
      def __repr__(self):
          return '<User {}>'.format(self.username)
  
      def set_password(self, password):
          self.password_hash = generate_password_hash(password)
  
      def check_password(self, password):
          return check_password_hash(self.password_hash, password)
  
      def avatar(self, size):
          digest = _hashlib.openssl_md5(
              self.email.lower().encode('utf-8')).hexdigest()
          return 'https://www.gravatar.com/avatar/{}?d=identicon&s={}'.format(
              digest, size)
  
      def follow(self, user):
          if not self.is_following(user):
              self.followed.append(user)
  
      def unfollow(self, user):
          if self.is_following(user):
              self.followed.remove(user)
  
      def is_following(self, user):
          return self.followed.filter(
              followers.c.followed_id == user.id).count() > 0
  
      def followed_posts(self):
          followed = Post.query.join(
              followers, (followers.c.followed_id == Post.user_id)).filter(
                  followers.c.follower_id == self.id)
          own = Post.query.filter_by(user_id=self.id)
          return followed.union(own).order_by(Post.timestamp.desc())
  
      def get_reset_password_token(self, expires_in=600):
          return jwt.encode(
              {'reset_password': self.id, 'exp': time() + expires_in},
              current_app.config['SECRET_KEY'],
              algorithm='HS256').decode('utf-8')
  
      @staticmethod
      def verify_reset_password_token(token):
          try:
              id = jwt.decode(  # pylint: disable=redefined-builtin
                  token, current_app.config['SECRET_KEY'],
                  algorithms=['HS256'])['reset_password']
          except Exception as e:
              print("EXCEPTION FORMAT PRINT:\n{}".format(e))
              return
          return User.query.get(id)
  
  
  class Post(SearchableMixin, db.Model):
      __searchable__ = ['clientname', 'clientss', 'clientemail', 'clientphone',
                        'clientaddress', 'clientcity', 'clientzip', 'clientinfo']
      id = db.Column(db.Integer, primary_key=True)
      clientname = db.Column(db.String(64), index=True)
      clientss = db.Column(db.String(11), index=True, unique=True)
      clientemail = db.Column(db.String(128), index=True, unique=True)
      clientphone = db.Column(db.String(24), index=True)
      clientaddress = db.Column(db.String(100), index=True)
      clientcity = db.Column(db.String(32), index=True)
      clientzip = db.Column(db.String(8), index=True)
      clientinfo = db.Column(db.Text)
      timestamp = db.Column(db.DateTime, index=True, default=datetime.utcnow)
      user_id = db.Column(db.Integer, db.ForeignKey('user.id'))
  
      # def __repr__(self):
      #    return '{}'.format(self.clientname, self.clientss,
      #                       self.clientemail, self.clientphone,
      #                       self.clientaddress, self.clientcity,
      #                       self.clientzip, self.clientinfo)
      def __repr__(self):
          return '<Post {}>'.format(self.clientname)
  