refactor db accessor

core/nkode/common.go

@@ -0,0 +1,89 @@
+package nkode
+
+import (
+	"errors"
+	"github.com/google/uuid"
+	m "go-nkode/core/model"
+	py "go-nkode/py-builtin"
+)
+
+var KeyIndexOutOfRange error = errors.New("one or more keys is out of range")
+
+func ValidKeyEntry(user User, customer Customer, selectedKeys []int) ([]int, error) {
+	validKeys := py.All[int](selectedKeys, func(idx int) bool {
+		return 0 <= idx && idx < user.Kp.NumbOfKeys
+	})
+	if !validKeys {
+		panic(KeyIndexOutOfRange)
+	}
+
+	var err error
+	passcodeLen := len(selectedKeys)
+	err = customer.NKodePolicy.ValidLength(passcodeLen)
+	if err != nil {
+		return nil, err
+	}
+
+	setVals, err := customer.Attributes.SetVals(user.Kp)
+	if err != nil {
+		return nil, err
+	}
+
+	passcodeSetVals, err := user.DecipherMask(setVals, passcodeLen)
+	if err != nil {
+		return nil, err
+	}
+	presumedAttrIdxVals := make([]int, passcodeLen)
+
+	for idx := range presumedAttrIdxVals {
+		keyNumb := selectedKeys[idx]
+		setIdx, err := customer.Attributes.IndexOfSet(passcodeSetVals[idx])
+		if err != nil {
+			return nil, err
+		}
+		selectedAttrIdx, err := user.Interface.GetAttrIdxByKeyNumbSetIdx(setIdx, keyNumb)
+		if err != nil {
+			return nil, err
+		}
+		presumedAttrIdxVals[idx] = selectedAttrIdx
+	}
+	err = customer.IsValidNKode(user.Kp, presumedAttrIdxVals)
+	if err != nil {
+		panic(err)
+	}
+	attrVals, err := customer.Attributes.AttrVals(user.Kp)
+	if err != nil {
+		panic(err)
+	}
+	err = user.UserKeys.ValidPassword(user.EncipheredPasscode.Code, presumedAttrIdxVals, attrVals)
+	if err != nil {
+		return nil, err
+	}
+
+	return presumedAttrIdxVals, nil
+}
+
+func NewUser(customer Customer, username m.Username, passcodeIdx []int, ui UserInterface, kp m.KeypadDimension) (*User, error) {
+	setVals, err := customer.Attributes.SetVals(kp)
+	if err != nil {
+		return nil, err
+	}
+	newKeys, err := NewUserCipherKeys(&kp, setVals, customer.NKodePolicy.MaxNkodeLen)
+	if err != nil {
+		return nil, err
+	}
+	encipheredNKode, err := newKeys.EncipherNKode(passcodeIdx, customer.Attributes)
+	if err != nil {
+		return nil, err
+	}
+	newUser := User{
+		Id:                 m.UserId(uuid.New()),
+		Username:           username,
+		EncipheredPasscode: *encipheredNKode,
+		UserKeys:           *newKeys,
+		Interface:          ui,
+		Kp:                 kp,
+		CustomerId:         customer.Id,
+	}
+	return &newUser, nil
+}