Initial commit

Please Note:
This app is going to be developed in a TDD style. Please add test first
and then the corresponding code. This way we can be sure everything
works and it should help us coordinate our work.

opennebula_api/models.py

@@ -0,0 +1,70 @@
+import oca
+import socket
+
+from django.db import models
+from django.conf import settings
+
+from oca.pool import WrongNameError
+
+class VirtualMachineTemplate(models.Model):
+    """This class represents an opennebula template."""
+    opennebula_id = models.IntegerField()
+    base_price = models.FloatField()
+    memory_price = models.FloatField()
+    core_price = models.FloatField()
+    disk_size_price = models.FloatField()
+
+
+class VirtualMachine(models.Model):
+    """This class represents an opennebula virtual machine."""
+    opennebula_id = models.IntegerField()
+    template = models.ForeignKey(VirtualMachineTemplate)
+
+class OpenNebulaManager():
+    """This class represents an opennebula manager."""
+
+    def __init__(self, email=None, password=None, create_user=True):
+        
+        # Get oneadmin client
+        self.oneadmin_client = self._get_opennebula_client(
+            settings.OPENNEBULA_USERNAME,
+            settings.OPENNEBULA_PASSWORD
+        )
+
+        if not create_user:
+            return
+
+        # Get or create oppenebula user using given credentials
+        self.opennebula_user = self._get_or_create_user(
+            email,
+            password
+        )
+
+        # If opennebula user was created/obtained, get his client
+        if self.opennebula_user:
+            self.client = self._get_opennebula_client(
+                email,
+                password
+            )
+
+    def _get_opennebula_client(self, username, password):
+        return oca.Client("{0}:{1}".format(
+            username,
+            password),
+            "{protocol}://{domain}:{port}{endpoint}".format(
+                protocol=settings.OPENNEBULA_PROTOCOL,
+                domain=settings.OPENNEBULA_DOMAIN,
+                port=settings.OPENNEBULA_PORT,
+                endpoint=settings.OPENNEBULA_ENDPOINT
+        ))
+
+    def _get_or_create_user(self, email, password):
+        try:
+            user_pool = oca.UserPool(self.oneadmin_client)
+            user_pool.info()
+            opennebula_user = user_pool.get_by_name(email)
+            return opennebula_user
+        except WrongNameError as wrong_name_err:
+            opennebula_user = self.oneadmin_client.call(oca.User.METHODS['allocate'], email,
+                                                        password, 'core')
+            return opennebula_user