Resolve "Support confidence in create_transcription_entity helper"

Closes #94 (closed)

arkindex_worker/worker/entity.py

@@ -82,7 +82,9 @@ class EntityMixin(object):
 
         return entity["id"]
 
-    def create_transcription_entity(self, transcription, entity, offset, length):
+    def create_transcription_entity(
+        self, transcription, entity, offset, length, confidence=None
+    ):
         """
         Create a link between an existing entity and an existing transcription through API
         """
@@ -98,6 +100,9 @@ class EntityMixin(object):
         assert (
             length is not None and isinstance(length, int) and length > 0
         ), "length shouldn't be null and should be a strictly positive integer"
+        assert (
+            confidence is None or isinstance(confidence, float) and 0 <= confidence <= 1
+        ), "confidence should be null or a float in [0..1] range"
         if self.is_read_only:
             logger.warning(
                 "Cannot create transcription entity as this worker is in read-only mode"
@@ -112,6 +117,7 @@ class EntityMixin(object):
                 "length": length,
                 "offset": offset,
                 "worker_version_id": self.worker_version_id,
+                "confidence": confidence,
             },
         )
         # TODO: Report transcription entity creation
@@ -125,6 +131,7 @@ class EntityMixin(object):
                     offset=offset,
                     length=length,
                     worker_version_id=self.worker_version_id,
+                    confidence=confidence,
                 )
             except IntegrityError as e:
                 logger.warning(