move everything to backend folder for migration to dashboard repository

backend/helpers/error_handler.py

@@ -0,0 +1,50 @@
+from flask import jsonify
+from jsonschema import ValidationError
+
+
+class KratosError(Exception):
+    pass
+
+
+class HydraError(Exception):
+    pass
+
+
+class BadRequest(Exception):
+    pass
+
+class Unauthorized(Exception):
+    pass
+
+def bad_request_error(e):
+    message = e.args[0] if e.args else "Bad request to the server."
+    return jsonify({"errorMessage": message}), 400
+
+
+def validation_error(e):
+    original_error = e.description
+    return (
+        jsonify({"errorMessage": "{} is not valid.".format(original_error.path[0])}),
+        400,
+    )
+
+
+def kratos_error(e):
+    message = "[KratosError] " + e.args[0] if e.args else "Failed to contact Kratos."
+    status_code = e.args[1] if e.args else 500
+    return jsonify({"errorMessage": message}), status_code
+
+
+def hydra_error(e):
+    message = "[HydraError] " + e.args[0] if e.args else "Failed to contact Hydra."
+    status_code = e.args[1] if e.args else 500
+    return jsonify({"errorMessage": message}), status_code
+
+
+def global_error(e):
+    message = str(e)
+    return jsonify({"errorMessage": message}), 500
+
+def unauthorized_error(e):
+    message = str(e)
+    return jsonify({"errorMessage": message}), 403