1 files changed, 30 insertions, 0 deletions
diff --git a/web-server/opendc/models/model.py b/web-server/opendc/models/model.py
new file mode 100644
index 00000000..2505ae61
--- /dev/null
+++ b/web-server/opendc/models/model.py
@@ -0,0 +1,30 @@
+from opendc.util.database import DB
+from opendc.util.exceptions import ClientError
+from opendc.util.rest import Response
+
+
+class Model:
+    collection_name = '<specified in subclasses>'
+
+    @classmethod
+    def from_id(cls, _id):
+        return cls(DB.fetch_one({'_id': _id}, Model.collection_name))
+
+    def __init__(self, obj):
+        self.obj = obj
+
+    def check_exists(self):
+        if self.obj is None:
+            raise ClientError(Response(404, 'Not found.'))
+
+    def set_property(self, key, value):
+        self.obj[key] = value
+
+    def insert(self):
+        self.obj = DB.insert(self.obj, self.collection_name)
+
+    def update(self):
+        self.obj = DB.update(self.obj['_id'], self.obj, self.collection_name)
+
+    def delete(self):
+        self.obj = DB.delete_one({'_id': self.obj['_id']}, self.collection_name)