build: Flatten project structure

This change updates the project structure to become flattened. 
Previously, the simulator, frontend and API each lived into their own directory. 

With this change, all modules of the project live in the top-level directory of 
the repository.

1 files changed, 12 insertions, 0 deletions

diff --git a/opendc-web/opendc-web-api/opendc/util/json.py b/opendc-web/opendc-web-api/opendc/util/json.py
new file mode 100644
index 00000000..2ef4f965
--- /dev/null
+++ b/opendc-web/opendc-web-api/opendc/util/json.py
@@ -0,0 +1,12 @@
+import flask
+from bson.objectid import ObjectId
+
+
+class JSONEncoder(flask.json.JSONEncoder):
+    """
+    A customized JSON encoder to handle unsupported types.
+    """
+    def default(self, o):
+        if isinstance(o, ObjectId):
+            return str(o)
+        return flask.json.JSONEncoder.default(self, o)