Allow (de-)selection of owners in Process edit view.

[plomtask] / plomtask / processes.py

diff --git a/plomtask/processes.py b/plomtask/processes.py
index 62220462936ad9452f45d1f87813bf38fcbb5bab..23da7c10f365539661fbf7cb5815f61158a6c923 100644 (file)
--- a/plomtask/processes.py
+++ b/plomtask/processes.py
@@ -163,6 +163,27 @@ class Process(BaseModel[int], ConditionsRelations):
             walk_steps(step)
             self.explicit_steps += [step]
 
+    def set_owners(self, db_conn: DatabaseConnection,
+                   owner_ids: list[int]) -> None:
+        """Re-set owners to those identified in owner_ids."""
+        owners_old = self.used_as_step_by(db_conn)
+        losers = [o for o in owners_old if o.id_ not in owner_ids]
+        owners_old_ids = [o.id_ for o in owners_old]
+        winners = [Process.by_id(db_conn, id_) for id_ in owner_ids
+                   if id_ not in owners_old_ids]
+        steps_to_remove = []
+        for loser in losers:
+            steps_to_remove += [s for s in loser.explicit_steps
+                                if s.step_process_id == self.id_]
+        for step in steps_to_remove:
+            step.remove(db_conn)
+        for winner in winners:
+            assert isinstance(winner.id_, int)
+            assert isinstance(self.id_, int)
+            new_step = ProcessStep(None, winner.id_, self.id_, None)
+            new_explicit_steps = winner.explicit_steps + [new_step]
+            winner.set_steps(db_conn, new_explicit_steps)
+
     def save(self, db_conn: DatabaseConnection) -> None:
         """Add (or re-write) self and connected items to DB."""
         super().save(db_conn)