Refactor models to implement ValidatableMixin; add validation logic for state management in Area, Brand, Item, Room, and RoomFunction classes

models/areas.py

@@ -7,9 +7,11 @@ from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from . import db
 from ..temp import is_temp_id
+from ..utils.validation import ValidatableMixin
 
-class Area(db.Model):
+class Area(ValidatableMixin, db.Model):
     __tablename__ = 'Areas'
+    VALIDATION_LABEL = "Area"
 
     id: Mapped[int] = mapped_column("ID", Integer, Identity(start=1, increment=1), primary_key=True)
     name: Mapped[Optional[str]] = mapped_column("Area", Unicode(255), nullable=True)
@@ -96,3 +98,26 @@ class Area(db.Model):
             **{str(temp): real for temp, real in temp_id_map.items()}  # "temp-1" → 5
         }
         return id_map
+
+    @classmethod
+    def validate_state(cls, submitted_items: list[dict]) -> list[str]:
+        errors = []
+
+        for index, item in enumerate(submitted_items):
+            if not isinstance(item, dict):
+                errors.append(f"Area entry #{index + 1} is not a valid object.")
+                continue
+
+            name = item.get('name')
+            if not name or not str(name).strip():
+                errors.append(f"Area entry #{index + 1} is missing a name.")
+
+            raw_id = item.get('id')
+            if raw_id is not None:
+                try:
+                    _ = int(raw_id)
+                except (ValueError, TypeError):
+                    if not is_temp_id(raw_id):
+                        errors.append(f"Area entry #{index + 1} has invalid ID: {raw_id}")
+
+        return errors