refactor: extract validate_value to avoid repetition

program/models.py

@@ -577,16 +577,22 @@ class ImageShapeField(models.CharField):
         super().__init__(*args, **kwargs)
 
 
+def validate_value(value: list | dict, schema: dict) -> None:
+    """Validates value against the schema. Raises a `DjangoValidationError` if it is invalid."""
+
+    try:
+        jsonschema.validate(instance=value, schema=schema)
+    except jsonschema.exceptions.ValidationError as e:
+        raise DjangoValidationError(e.args[0])
+
+
 def validate_cba_domains(value):
     schema = {
         "type": "array",
         "items": {"type": "string"},
     }
 
-    try:
-        jsonschema.validate(value, schema)
-    except jsonschema.exceptions.ValidationError as e:
-        raise DjangoValidationError(e.args[0])
+    validate_value(value, schema)
 
 
 def validate_line_in_channels(value):
@@ -597,10 +603,7 @@ def validate_line_in_channels(value):
         },
     }
 
-    try:
-        jsonschema.validate(value, schema)
-    except jsonschema.exceptions.ValidationError as e:
-        raise DjangoValidationError(e.args[0])
+    validate_value(value, schema)
 
 
 def validate_fallback_pools(value):
@@ -611,10 +614,7 @@ def validate_fallback_pools(value):
         },
     }
 
-    try:
-        jsonschema.validate(value, schema)
-    except jsonschema.exceptions.ValidationError as e:
-        raise DjangoValidationError(e.args[0])
+    validate_value(value, schema)
 
 
 class RadioSettings(models.Model):