Implement legal terms, Android client compatibility and more

backend/services/main/verification_service.py

@@ -0,0 +1,50 @@
+"""Server-side verification status computation."""
+
+from enum import Enum
+
+from sqlalchemy.orm import Session
+
+from .models import User
+from .similarity import is_user_similar_to_verified
+
+
+class VerificationStatus(str, Enum):
+    VERIFIED = "verified"
+    WARNING = "warning"
+    BLOCKED = "blocked"
+    NONE = "none"
+
+
+def get_verified_users_data(db: Session) -> list[dict[str, str]]:
+    verified_users = (
+        db.query(User)
+        .filter(
+            User.verified.is_(True),
+            User.deleted.is_(False),
+            User.suspended.is_(False),
+        )
+        .all()
+    )
+    return [
+        {"username": user.username, "display_name": user.display_name}
+        for user in verified_users
+    ]
+
+
+def compute_verification_status(
+    user: User,
+    verified_users_data: list[dict[str, str]],
+) -> VerificationStatus:
+    if user.deleted:
+        return VerificationStatus.NONE
+    if user.suspended:
+        return VerificationStatus.BLOCKED
+    if user.verified:
+        return VerificationStatus.VERIFIED
+
+    is_similar, _ = is_user_similar_to_verified(
+        user.username,
+        user.display_name,
+        verified_users_data,
+    )
+    return VerificationStatus.WARNING if is_similar else VerificationStatus.NONE