1 files changed, 59 insertions, 0 deletions
diff --git a/muck/change.py b/muck/change.py
new file mode 100644
index 0000000..d5a3fd2
--- /dev/null
+++ b/muck/change.py
@@ -0,0 +1,59 @@
+# Copyright (C) 2018  Lars Wirzenius
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+class Change:
+
+    def __init__(self, op, meta, res):
+        self._dict = {
+            'op': op,
+            'meta': meta,
+            'res': res,
+        }
+
+    def as_dict(self):
+        return self._dict
+
+    def get_op(self):
+        return self._dict['op']
+
+    def get_id(self):
+        return self.get_meta()['id']
+
+    def get_rev(self):
+        return self.get_meta()['rev']
+
+    def get_meta(self):
+        return self._dict['meta']
+
+    def get_res(self):
+        return self._dict['res']
+
+
+class CreateChange(Change):
+
+    def __init__(self, meta=None, res=None):
+        super().__init__(op='create', meta=meta, res=res)
+
+
+class UpdateChange(Change):
+
+    def __init__(self, meta=None, res=None):
+        super().__init__(op='update', meta=meta, res=res)
+
+
+class DeleteChange(Change):
+
+    def __init__(self, meta=None, res=None):
+        super().__init__(op='delete', meta=meta, res={})