refactor errors

core/keypad_dimension.go

@@ -1,6 +1,8 @@
 package core
 
-import "errors"
+import (
+	py "go-nkode/py-builtin"
+)
 
 type KeypadDimension struct {
 	AttrsPerKey int `json:"attrs_per_key"`
@@ -17,11 +19,23 @@ func (kp *KeypadDimension) IsDispersable() bool {
 
 func (kp *KeypadDimension) IsValidKeypadDimension() error {
 	if KeypadMin.AttrsPerKey > kp.AttrsPerKey || KeypadMax.AttrsPerKey < kp.AttrsPerKey || KeypadMin.NumbOfKeys > kp.NumbOfKeys || KeypadMax.NumbOfKeys < kp.NumbOfKeys {
-		return errors.New("keypad dimensions out of range")
+		return ErrInvalidKeypadDimensions
 	}
 	return nil
 }
 
+func (kp *KeypadDimension) ValidKeySelections(selectedKeys []int) bool {
+	return py.All[int](selectedKeys, func(idx int) bool {
+		return 0 <= idx && idx < kp.NumbOfKeys
+	})
+}
+
+func (kp *KeypadDimension) ValidateAttributeIndices(attrIndicies []int) bool {
+	return py.All[int](attrIndicies, func(i int) bool {
+		return i >= 0 && i < kp.TotalAttrs()
+	})
+}
+
 var (
 	KeypadMax = KeypadDimension{
 		AttrsPerKey: 16,