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

@@ -6,6 +6,9 @@ class WorkerVersionMixin(object):
         """
         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]
 
@@ -15,32 +18,12 @@ class WorkerVersionMixin(object):
         return worker_version
 
     def get_worker_version_slug(self, worker_version_id: str) -> str:
-        """
-        Get worker version slug from cache if possible, otherwise make API request
-        """
-        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 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.
 
         :type ml_result: Element, classification or transcription
         """
-
-        # Handle cached models
-        if hasattr(ml_result, "worker_version_id"):
-            worker_version_id = ml_result.worker_version_id
-        elif "worker_version" in ml_result:
-            worker_version_id = ml_result["worker_version"]
-        # transcriptions have worker_version_id but elements have worker_version
-        elif "worker_version_id" in ml_result:
-            worker_version_id = ml_result["worker_version_id"]
-        else:
-            raise ValueError(f"Unable to get slug from: {ml_result}")
-
-        if worker_version_id is None:
-            return
-
-        return self.get_worker_version_slug(worker_version_id)
+        worker_version = self.get_worker_version(worker_version_id)
+        return worker_version["worker"]["slug"]