renaming backend, cellxgene to server, client respectively

server/app/util/utils.py

@@ -0,0 +1,40 @@
+import json
+
+from numpy import float32, integer
+from flask import make_response, jsonify, Response
+
+
+class Float32JSONEncoder(json.JSONEncoder):
+    def default(self, obj):
+        if isinstance(obj, float32):
+            return float(obj)
+        elif isinstance(obj, integer):
+            return int(obj)
+        return json.JSONEncoder.default(self, obj)
+
+
+def make_payload(data, errormessage="", errorcode=200):
+    """
+    Creates JSON respons for requests
+    :param data: json data
+    :param errormessage: error message
+    :param errorcode: http error code
+    :return: flask json repsonse
+    """
+    error = False
+    if errormessage:
+        error = True
+    # Questionable
+    data = json.loads(json.dumps(data, cls=Float32JSONEncoder))
+    return make_response(jsonify({
+        "data": data,
+        "status": {
+            "error": error,
+            "errormessage": errormessage,
+        }
+    }), errorcode)
+
+
+def make_streaming_response(data_generator, errorcode=200, content_type="application/json"):
+    # TODO headers
+    return Response(data_generator, status=errorcode, content_type=content_type)