Add complete implementation of create_user

dal/ungleich_ldap.py

@@ -4,6 +4,9 @@ import random
 
 import ldap3
 from django.conf import settings
+import logging
+
+logger = logging.getLogger(__name__)
 
 
 class LdapManager:
@@ -67,38 +70,53 @@ class LdapManager:
         return passwd
 
 
-    def create_user(self, loginname, displayname, mail, password):
-        """
-        Create a new user in the LDAP storage.
-
-        *loginname* must be a unique, valid user id. It is generally safe to
-        pass lower-case ascii letters here. The *loginname* of an account
-        cannot be changed.
-
-        *displayname* is the name which is shown to other users. This can be
-        changed in the future.
-
-        *mail* is a valid mail address of the user.
-
-        *password* is the initial plain text password for the user.
-        """
-
+    def create_user(self, user, password, firstname, lastname, email):
         conn = self.get_admin_conn()
+        uidNumber = self._get_max_uid() + 1
+        logger.debug("uidNumber={uidNumber}".format(uidNumber=uidNumber))
+        results = True
+        while results:
+            results = self.check_user_exists(
+                "",
+                True,
+                '(&(objectClass=inetOrgPerson)(objectClass=posixAccount)'
+                '(objectClass=top)(uidNumber={uidNumber}))'.format(
+                    uidNumber=uidNumber
+                )
+            )
+            if results:
+                logger.debug(
+                    "{uid} exists. Trying next.".format(uid=uidNumber)
+                )
+                uidNumber += 1
+        logger.debug("{uid} does not exist. Using it".format(uid=uidNumber))
+        self._set_max_uid(uidNumber)
         try:
             conn.add(
-                ("uid={uid}," + settings.LDAP_CUSTOMER_DN).format(uid=loginname),
-                ["inetOrgPerson"],
+                ("uid={uid}," + settings.LDAP_CUSTOMER_DN).format(uid=user),
+                ["inetOrgPerson", "posixAccount", "ldapPublickey"],
                 {
-                    "uid": [loginname],
-                    "cn": [displayname],
-                    "sn": ["XXX"],
-                    "givenName": ["XXX"],
-                    "mail": [mail],
-                    "userpassword": [self._ssha_password(
+                    "uid": [user.encode("utf-8")],
+                    "sn": [lastname.encode("utf-8")],
+                    "givenName": [firstname.encode("utf-8")],
+                    "cn": ["{} {}".format(firstname, lastname).encode("utf-8")],
+                    "displayName": ["{} {}".format(firstname, lastname).encode("utf-8")],
+                    "uidNumber": [str(uidNumber)],
+                    "gidNumber": [str(settings.LDAP_CUSTOMER_GROUP_ID)],
+                    "loginShell": ["/bin/bash"],
+                    "homeDirectory": ["/home/{}".format(user).encode("utf-8")],
+                    "mail": email.encode("utf-8"),
+                    "userPassword": [self._ssha_password(
                         password.encode("utf-8")
                     )]
                 }
             )
+            logger.debug('Created user %s %s' % (user.encode('utf-8'),
+                                                 uidNumber))
+        except Exception as ex:
+            logger.debug('Could not create user %s' % user.encode('utf-8'))
+            logger.error("Exception: " + str(ex))
+            raise Exception(ex)
         finally:
             conn.unbind()
 
@@ -124,21 +142,63 @@ class LdapManager:
         conn.unbind()
         return return_val
 
-    def check_user_exists(self, uid, is_customer=True):
+    def check_user_exists(self, uid, is_customer=True, search_filter=""):
         """
         Check if the user with the given uid exists in the customer group.
 
         :param uid: str representing the user
         :param is_customer: bool representing whether the current user is a
                             customer. By default, the user is a customer (assume)
+        :param search_filter: str representing the filter condition to find
+                            users. If its empty, the search finds the user with
+                            the given uid.
         :return: True if the user exists otherwise return False
         """
         conn = self.get_admin_conn()
         try:
             result = conn.search(
                 settings.LDAP_CUSTOMER_DN if is_customer else settings.LDAP_USERS_DN,
-                search_filter='(uid={uid})'.format(uid=uid)
+                search_filter=search_filter if len(search_filter)> 0 else
+                '(uid={uid})'.format(uid=uid)
             )
         finally:
             conn.unbind()
         return result
+
+    def _set_max_uid(self, max_uid):
+        """
+        a utility function to save max_uid value to a file
+
+        :param max_uid: an integer representing the max uid
+        :return:
+        """
+        with open(settings.LDAP_MAX_UID_FILE_PATH, 'w+') as handler:
+            handler.write(str(max_uid))
+
+    def _get_max_uid(self):
+        """
+        A utility function to read the max uid value that was previously set
+
+        :return: An integer representing the max uid value that was previously
+         set
+        """
+        try:
+            with open(settings.LDAP_MAX_UID_FILE_PATH, 'r+') as handler:
+                try:
+                    return_value = int(handler.read())
+                except ValueError as ve:
+                    logger.error(
+                        "Error reading int value from {}. {}"
+                        "Returning default value {} instead".format(
+                            settings.LDAP_MAX_UID_PATH,
+                            str(ve),
+                            settings.LDAP_DEFAULT_START_UID
+                        )
+                    )
+                    return_value = settings.LDAP_DEFAULT_START_UID
+                return return_value
+        except FileNotFoundError as fnfe:
+            logger.error("File not found : " + str(fnfe))
+            return_value = settings.LDAP_DEFAULT_START_UID
+            logger.error("So, returning UID={}".format(return_value))
+            return return_value