[WIP] Exception handling

app/routes/__init__.py

@@ -1 +1,39 @@
-from .api import api
+from flask import json, make_response
+from werkzeug.exceptions import HTTPException
+
+from .api import api
+from ..controller.exceptions import LibraryExceptionBase
+
+@api.errorhandler(LibraryExceptionBase)
+def handle_exception(e):
+    """Return JSON instead of HTML for HTTP errors."""
+    # start with the correct headers and status code from the error
+    response = make_response()
+    # replace the body with JSON
+    response.data = json.dumps({
+        "status": "error",
+        "code": e.code,
+        "status_code": e.status_code,
+        "name": e.name,
+        "error": e.error,
+    })
+    response.content_type = "application/json"
+    response.status_code = e.status_code
+    return response
+
+@api.errorhandler(HTTPException)
+def handle_exception(e):
+    """Return JSON instead of HTML for HTTP errors."""
+    # start with the correct headers and status code from the error
+    response = e.get_response()
+    # replace the body with JSON
+    response.data = json.dumps({
+        "status": "error",
+        "code": f"000{e.code}",
+        "status_code": e.code,
+        "name": e.name,
+        "error": e.description,
+    })
+    response.content_type = "application/json"
+    return response
+