Authentication and Odata compliance

cloud/odata_query.py

@@ -0,0 +1,41 @@
+def parse_odata_query(request_args):
+    """
+    Translates standard OData query parameters ($top, $skip, $orderby, $filter)
+    into MongoDB query parameters.
+    """
+    limit = int(request_args.get('$top', 50))
+    skip = int(request_args.get('$skip', 0))
+    
+    # Parse $orderby (e.g., $orderby=received_at desc)
+    sort = []
+    orderby_str = request_args.get('$orderby')
+    if orderby_str:
+        parts = orderby_str.split()
+        field = parts[0]
+        direction = -1 if len(parts) > 1 and parts[1].lower() == 'desc' else 1
+        sort.append((field, direction))
+
+    # Parse basic $filter (e.g., $filter=device_id eq '1')
+    mongo_filter = {}
+    filter_str = request_args.get('$filter')
+    if filter_str and ' eq ' in filter_str:
+        field, val = filter_str.split(' eq ')
+        field = field.strip()
+        val = val.strip().strip("'").strip('"')
+        
+        # Cast data types
+        if val.isdigit():
+            val = int(val)
+        elif val.lower() == 'true':
+            val = True
+        elif val.lower() == 'false':
+            val = False
+
+        mongo_filter[field] = val
+
+    return {
+        "filter": mongo_filter,
+        "limit": limit,
+        "skip": skip,
+        "sort": sort or [("_id", -1)]
+    }