Drop DataSource handling

Closes #29 (closed)

• Removes arkindex_worker.worker.MANUAL_SLUG
  • No workers affected in teklia/workers
• Removes ElementsWorker.get_ml_result_slug
  • Affects generic_exporter (here, here, here, here)
  • Affects horae_exporter (here and here)
  • Affects balsac_exporter (here, here and here)

arkindex_worker/worker/version.py

 # -*- coding: utf-8 -*-
 
-MANUAL_SLUG = "manual"
-
 
 class WorkerVersionMixin(object):
     def get_worker_version(self, worker_version_id: str) -> dict:
         """
         Get worker version from cache if possible, otherwise make API request
         """
+        if worker_version_id is None:
+            raise ValueError("No worker version ID")
+
         if worker_version_id in self._worker_version_cache:
             return self._worker_version_cache[worker_version_id]
 
@@ -18,37 +19,11 @@ class WorkerVersionMixin(object):
 
     def get_worker_version_slug(self, worker_version_id: str) -> str:
         """
-        Get worker version slug from cache if possible, otherwise make API request
+        Helper function to get the worker slug from element, classification or transcription.
+        Gets the worker version slug from cache if possible, otherwise makes an API request.
+        Returns None if there is no associated worker version.
 
-        Should use `get_ml_result_slug` instead of using this method directly
+        :type worker_version_id: A worker version UUID
         """
         worker_version = self.get_worker_version(worker_version_id)
         return worker_version["worker"]["slug"]
-
-    def get_ml_result_slug(self, ml_result) -> str:
-        """
-        Helper function to get the slug from element, classification or transcription
-
-        Can handle old and new (source vs worker_version)
-
-        :type ml_result: Element or classification or transcription
-        """
-        if (
-            "source" in ml_result
-            and ml_result["source"]
-            and ml_result["source"]["slug"]
-        ):
-            return ml_result["source"]["slug"]
-        elif "worker_version" in ml_result and ml_result["worker_version"]:
-            return self.get_worker_version_slug(ml_result["worker_version"])
-        # transcriptions have worker_version_id but elements have worker_version
-        elif "worker_version_id" in ml_result and ml_result["worker_version_id"]:
-            return self.get_worker_version_slug(ml_result["worker_version_id"])
-        elif "worker_version" in ml_result and ml_result["worker_version"] is None:
-            return MANUAL_SLUG
-        elif (
-            "worker_version_id" in ml_result and ml_result["worker_version_id"] is None
-        ):
-            return MANUAL_SLUG
-        else:
-            raise ValueError(f"Unable to get slug from: {ml_result}")