initial commit

1 files changed, 27 insertions, 0 deletions

diff --git a/src/srht_contrib/utils/identity.py b/src/srht_contrib/utils/identity.py
new file mode 100644
index 0000000..adc9a9d
--- /dev/null
+++ b/src/srht_contrib/utils/identity.py
@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+from sqlalchemy import select
+from sqlalchemy.orm import Session
+
+from srht_contrib.models import ActorAlias
+
+
+class ActorIdentityResolver:
+    def __init__(self, configured_aliases: dict[str, list[str]] | None = None) -> None:
+        self.configured_aliases = configured_aliases or {}
+
+    def canonicalize(self, actor: str, db: Session | None = None) -> str:
+        normalized = actor.strip()
+        if not normalized:
+            return normalized
+
+        for canonical, aliases in self.configured_aliases.items():
+            if normalized == canonical or normalized in aliases:
+                return canonical
+
+        if db is not None:
+            alias = db.scalar(select(ActorAlias).where(ActorAlias.alias == normalized))
+            if alias is not None:
+                return alias.canonical_actor
+
+        return normalized