X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=planetstack%2Fcore%2Fmodels%2Fplcorebase.py;h=4ac60b391575ce5338a1b7dc83954c424aa1a76e;hb=6bdf86d7b248c722134ab8fbb6e084cae4496fcd;hp=4a64ce5aa9fea5a51aa2adc98ea41844b47ee597;hpb=ce652d046cad059f53c39f69f0bb87719e467c52;p=plstackapi.git

diff --git a/planetstack/core/models/plcorebase.py b/planetstack/core/models/plcorebase.py
index 4a64ce5..4ac60b3 100644
--- a/planetstack/core/models/plcorebase.py
+++ b/planetstack/core/models/plcorebase.py
@@ -1,57 +1,121 @@
+import datetime
 import os
+import sys
 from django.db import models
 from django.forms.models import model_to_dict
-from observer.event_manager import EventSender
-
+from django.core.urlresolvers import reverse
+from django.forms.models import model_to_dict
+import model_policies
+
+try:
+    # This is a no-op if observer_disabled is set to 1 in the config file
+    from observer import *
+except:
+    print >> sys.stderr, "import of observer failed! printing traceback and disabling observer:"
+    import traceback
+    traceback.print_exc()
+
+    # guard against something failing
+    def notify_observer(*args, **kwargs):
+        pass
+
+# This manager will be inherited by all subclasses because
+# the core model is abstract.
+class PlCoreBaseDeletionManager(models.Manager):
+    def get_query_set(self):
+        return super(PlCoreBaseDeletionManager, self).get_query_set().filter(deleted=True)
+
+# This manager will be inherited by all subclasses because
+# the core model is abstract.
+class PlCoreBaseManager(models.Manager):
+    def get_query_set(self):
+        return super(PlCoreBaseManager, self).get_query_set().filter(deleted=False)
 
 class PlCoreBase(models.Model):
-
-	created = models.DateTimeField(auto_now_add=True)
-	updated = models.DateTimeField(auto_now=True)
-
-	class Meta:
-		abstract = True
-		app_label = "core"
-
-	def __init__(self, *args, **kwargs):
-		super(PlCoreBase, self).__init__(*args, **kwargs)
-		self.__initial = self._dict
-
-	@property
-	def diff(self):
-		d1 = self.__initial
-		d2 = self._dict
-		diffs = [(k, (v, d2[k])) for k, v in d1.items() if v != d2[k]]
-		return dict(diffs)
-
-	@property
-	def has_changed(self):
-		return bool(self.diff)
-
-	@property
-	def changed_fields(self):
-		return self.diff.keys()
-
-	def get_field_diff(self, field_name):
-		return self.diff.get(field_name, None)
-
-	def delete(self, *args, **kwds):
-		super(PlCoreBase, self).delete(*args, **kwds)
-
-#		EventSender().fire({'delete_flag':True,'model':self.__name__})
-
-	def save(self, *args, **kwargs):
-		super(PlCoreBase, self).save(*args, **kwargs)
-		
-		# Tell the observer that the source database has been updated
-		#EventSender().fire()
-
-		self.__initial = self._dict
-
-	@property
-	def _dict(self):
-		return model_to_dict(self, fields=[field.name for field in
-							 self._meta.fields])
+    objects = PlCoreBaseManager()
+    deleted_objects = PlCoreBaseDeletionManager()
+
+    # default values for created and updated are only there to keep evolution
+    # from failing.
+    created = models.DateTimeField(auto_now_add=True, default=datetime.datetime.now())
+    updated = models.DateTimeField(auto_now=True, default=datetime.datetime.now())
+    enacted = models.DateTimeField(null=True, default=None)
+    backend_status = models.CharField(max_length=140,
+                                      default="Provisioning in progress")
+    deleted = models.BooleanField(default=False)
+
+    class Meta:
+        # Changing abstract to False would require the managers of subclasses of
+        # PlCoreBase to be customized individually.
+        abstract = True
+        app_label = "core"
+
+    def __init__(self, *args, **kwargs):
+        super(PlCoreBase, self).__init__(*args, **kwargs)
+        self.__initial = self._dict
+
+    @property
+    def diff(self):
+        d1 = self.__initial
+        d2 = self._dict
+        diffs = [(k, (v, d2[k])) for k, v in d1.items() if v != d2[k]]
+        return dict(diffs)
+
+    @property
+    def has_changed(self):
+        return bool(self.diff)
+
+    @property
+    def changed_fields(self):
+        return self.diff.keys()
+
+    def get_field_diff(self, field_name):
+        return self.diff.get(field_name, None)
+
+    def can_update(self, user):
+        if user.is_readonly:
+            return False
+        if user.is_admin:
+            return True
+        return False
+
+    def delete(self, *args, **kwds):
+        # so we have something to give the observer
+        purge = kwds.get('purge',False)
+        try:
+            purge = purge or observer_disabled
+        except NameError:
+            pass
+            
+        if (purge):
+            del kwds['purge']
+            super(PlCoreBase, self).delete(*args, **kwds)
+        else:
+            self.deleted = True
+            self.enacted=None
+            self.save(update_fields=['enacted','deleted'])
+
+
+    def save(self, *args, **kwargs):
+        super(PlCoreBase, self).save(*args, **kwargs)
+
+        # This is a no-op if observer_disabled is set
+        notify_observer()
+
+        self.__initial = self._dict
+
+    def save_by_user(self, user, *args, **kwds):
+        if self.can_update(user):
+            self.save(*args, **kwds)
+
+    def delete_by_user(self, user, *args, **kwds):
+        if self.can_update(user):
+            self.delete(*args, **kwds)
+
+    @property
+    def _dict(self):
+        return model_to_dict(self, fields=[field.name for field in
+                             self._meta.fields])