Add basic sqlalchemy model.

Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>

models.py

@@ -0,0 +1,46 @@
+from sqlalchemy import create_engine
+from sqlalchemy import Integer, String, DateTime, Column, ForeignKey, Enum
+from sqlalchemy.orm import scoped_session, sessionmaker, relationship
+from sqlalchemy.ext.declarative import declarative_base
+
+Base = declarative_base()
+
+
+class User(Base):
+    __tablename__ = "user"
+
+    name = Column(String, primary_key=True)
+    token = Column(String())
+    client_id = Column(String())
+    client_secret = Column(String())
+    auth_token = Column(String)
+    refresh_token = Column(String)
+    token_valid = Column(DateTime)
+    last_check = Column(DateTime)
+    email = Column(String)
+    kindle_mail = Column(String)
+
+    jobs = relationship('Job', backref='user')
+
+
+class Job(Base):
+    __tablename__ = "job"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    article = Column(Integer)
+    title = Column(String)
+    user_name = Column(Integer, ForeignKey("user.name"))
+    format = Column(Enum('pdf', 'mobi'))
+
+
+def make_session(uri):
+    Session = sessionmaker(autocommit=False,
+                           autoflush=False,
+                           bind=create_engine(uri))
+    return scoped_session(Session)
+
+
+def re_create_db(uri):
+    engine = create_engine(uri)
+    Base.metadata.drop_all(engine)
+    Base.metadata.create_all(engine)