add aurweb.models.user.User

+ Added aurweb.models.user.User class. This is the first example
  of an sqlalchemy ORM model. We can search for users via for example:
  `session.query(User).filter(User.ID==1).first()`, where `session` is
  a configured `aurweb.db.session` object.
+ Along with the User class, defined the AccountType class.
  Each User maintains a relationship to its AccountType via User.AccountType.
+ Added AccountType.users backref.

Signed-off-by: Kevin Morris <kevr@0cost.org>

aurweb/models/user.py

@@ -0,0 +1,43 @@
+from sqlalchemy.orm import backref, mapper, relationship
+
+from aurweb.models.account_type import AccountType
+from aurweb.schema import Users
+
+
+class User:
+    """ An ORM model of a single Users record. """
+
+    def __init__(self, **kwargs):
+        self.AccountTypeID = kwargs.get("AccountTypeID")
+
+        account_type = kwargs.get("AccountType")
+        if account_type:
+            self.AccountType = account_type
+
+        self.Username = kwargs.get("Username")
+        self.Email = kwargs.get("Email")
+        self.BackupEmail = kwargs.get("BackupEmail")
+        self.Passwd = kwargs.get("Passwd")
+        self.Salt = kwargs.get("Salt")
+        self.RealName = kwargs.get("RealName")
+        self.LangPreference = kwargs.get("LangPreference")
+        self.Timezone = kwargs.get("Timezone")
+        self.Homepage = kwargs.get("Homepage")
+        self.IRCNick = kwargs.get("IRCNick")
+        self.PGPKey = kwargs.get("PGPKey")
+        self.RegistrationTS = kwargs.get("RegistrationTS")
+        self.CommentNotify = kwargs.get("CommentNotify")
+        self.UpdateNotify = kwargs.get("UpdateNotify")
+        self.OwnershipNotify = kwargs.get("OwnershipNotify")
+        self.SSOAccountID = kwargs.get("SSOAccountID")
+
+    def __repr__(self):
+        return "<User(ID='%s', AccountType='%s', Username='%s')>" % (
+            self.ID, str(self.AccountType), self.Username)
+
+
+# Map schema.Users to User and give it some relationships.
+mapper(User, Users, properties={
+    "AccountType": relationship(AccountType,
+                                backref=backref("users", lazy="dynamic"))
+})