fix invalid identifiers error code (#424)

Author: andrewleap-optimizely

Diff for: optimizely/helpers/enums.py

@@ -120,7 +120,6 @@ class Errors:
     NONE_VARIABLE_KEY_PARAMETER: Final = '"None" is an invalid value for variable key.'
     UNSUPPORTED_DATAFILE_VERSION: Final = (
         'This version of the Python SDK does not support the given datafile version: "{}".')
-    INVALID_SEGMENT_IDENTIFIER: Final = 'Audience segments fetch failed (invalid identifier).'
     FETCH_SEGMENTS_FAILED: Final = 'Audience segments fetch failed ({}).'
     ODP_EVENT_FAILED: Final = 'ODP event send failed ({}).'
     ODP_NOT_INTEGRATED: Final = 'ODP is not integrated.'

Diff for: optimizely/odp/odp_segment_api_manager.py

@@ -172,13 +172,15 @@ def fetch_segments(self, api_key: str, api_host: str, user_key: str,
 
         if response_dict and 'errors' in response_dict:
             try:
-                error_class = response_dict['errors'][0]['extensions']['classification']
-            except (KeyError, IndexError):
+                extensions = response_dict['errors'][0]['extensions']
+                error_class = extensions['classification']
+                error_code = extensions.get('code')
+            except (KeyError, IndexError, TypeError):
                 self.logger.error(Errors.FETCH_SEGMENTS_FAILED.format('decode error'))
                 return None
 
-            if error_class == 'InvalidIdentifierException':
-                self.logger.warning(Errors.INVALID_SEGMENT_IDENTIFIER)
+            if error_code == 'INVALID_IDENTIFIER_EXCEPTION':
+                self.logger.warning(Errors.FETCH_SEGMENTS_FAILED.format('invalid identifier'))
                 return None
             else:
                 self.logger.error(Errors.FETCH_SEGMENTS_FAILED.format(error_class))
@@ -188,6 +190,6 @@ def fetch_segments(self, api_key: str, api_host: str, user_key: str,
                 audiences = response_dict['data']['customer']['audiences']['edges']
                 segments = [edge['node']['name'] for edge in audiences if edge['node']['state'] == 'qualified']
                 return segments
-            except KeyError:
+            except (KeyError, TypeError):
                 self.logger.error(Errors.FETCH_SEGMENTS_FAILED.format('decode error'))
                 return None

Diff for: tests/test_odp_segment_api_manager.py

@@ -344,7 +344,8 @@ def test_fetch_qualified_segments__500(self):
                 "customer"
               ],
               "extensions": {
-                "classification": "InvalidIdentifierException"
+                "classification": "DataFetchingException",
+                "code": "INVALID_IDENTIFIER_EXCEPTION"
               }
             }
           ],