Extracted api representations hooks to separate file, added UT, and fixed linter issue

use `x not in y` instead of `not x in y`.

monkey/monkey_island/cc/app.py

@@ -1,11 +1,8 @@
 import os
 import uuid
-from datetime import datetime
 
-import bson
 import flask_restful
-from bson.json_util import dumps
-from flask import Flask, send_from_directory, make_response, Response
+from flask import Flask, send_from_directory, Response
 from werkzeug.exceptions import NotFound
 
 from monkey_island.cc.auth import init_jwt
@@ -24,6 +21,7 @@ from monkey_island.cc.resources.netmap import NetMap
 from monkey_island.cc.resources.node import Node
 from monkey_island.cc.resources.remote_run import RemoteRun
 from monkey_island.cc.resources.reporting.report import Report
+from monkey_island.cc.resources.representations import output_json
 from monkey_island.cc.resources.root import Root
 from monkey_island.cc.resources.telemetry import Telemetry
 from monkey_island.cc.resources.telemetry_feed import TelemetryFeed
@@ -62,32 +60,6 @@ def serve_home():
     return serve_static_file(HOME_FILE)
 
 
-def normalize_obj(obj):
-    if '_id' in obj and not 'id' in obj:
-        obj['id'] = obj['_id']
-        del obj['_id']
-
-    for key, value in list(obj.items()):
-        if isinstance(value, bson.objectid.ObjectId):
-            obj[key] = str(value)
-        if isinstance(value, datetime):
-            obj[key] = str(value)
-        if isinstance(value, dict):
-            obj[key] = normalize_obj(value)
-        if isinstance(value, list):
-            for i in range(0, len(value)):
-                if isinstance(value[i], dict):
-                    value[i] = normalize_obj(value[i])
-    return obj
-
-
-def output_json(obj, code, headers=None):
-    obj = normalize_obj(obj)
-    resp = make_response(dumps(obj), code)
-    resp.headers.extend(headers or {})
-    return resp
-
-
 def init_app_config(app, mongo_url):
     app.config['MONGO_URI'] = mongo_url
     app.config['SECRET_KEY'] = str(uuid.getnode())

monkey/monkey_island/cc/resources/representations.py

@@ -0,0 +1,31 @@
+from datetime import datetime
+
+import bson
+from bson.json_util import dumps
+from flask import make_response
+
+
+def normalize_obj(obj):
+    if ('_id' in obj) and ('id' not in obj):
+        obj['id'] = obj['_id']
+        del obj['_id']
+
+    for key, value in list(obj.items()):
+        if isinstance(value, bson.objectid.ObjectId):
+            obj[key] = str(value)
+        if isinstance(value, datetime):
+            obj[key] = str(value)
+        if isinstance(value, dict):
+            obj[key] = normalize_obj(value)
+        if isinstance(value, list):
+            for i in range(0, len(value)):
+                if isinstance(value[i], dict):
+                    value[i] = normalize_obj(value[i])
+    return obj
+
+
+def output_json(obj, code, headers=None):
+    obj = normalize_obj(obj)
+    resp = make_response(dumps(obj), code)
+    resp.headers.extend(headers or {})
+    return resp

monkey/monkey_island/cc/resources/representations_test.py

@@ -0,0 +1,53 @@
+from unittest import TestCase
+from datetime import datetime
+from .representations import normalize_obj
+
+import bson
+
+
+class TestJsonRepresentations(TestCase):
+    def test_normalize_obj(self):
+        # empty
+        self.assertEqual({}, normalize_obj({}))
+
+        # no special content
+        self.assertEqual(
+            {"a": "a"},
+            normalize_obj({"a": "a"})
+        )
+
+        # _id field -> id field
+        self.assertEqual(
+            {"id": 12345},
+            normalize_obj({"_id": 12345})
+        )
+
+        # obj id field -> str
+        obj_id_str = "123456789012345678901234"
+        self.assertEqual(
+            {"id": obj_id_str},
+            normalize_obj({"_id": bson.objectid.ObjectId(obj_id_str)})
+        )
+
+        # datetime -> str
+        dt = datetime.now()
+        expected = {"a": str(dt)}
+        result = normalize_obj({"a": dt})
+        self.assertEqual(expected, result)
+
+        # dicts and lists
+        self.assertEqual({
+                "a": [
+                    {"ba": obj_id_str,
+                     "bb": obj_id_str}
+                ],
+                "b": {"id": obj_id_str}
+            },
+            normalize_obj({
+                "a": [
+                    {"ba": bson.objectid.ObjectId(obj_id_str),
+                     "bb": bson.objectid.ObjectId(obj_id_str)}
+                ],
+                "b": {"_id": bson.objectid.ObjectId(obj_id_str)}
+            })
+        )