implement and test sql db accessor

core/model/customer.go

@@ -0,0 +1,91 @@
+package m
+
+import (
+	"errors"
+	"fmt"
+	"github.com/google/uuid"
+	"go-nkode/hashset"
+	py "go-nkode/py-builtin"
+	"go-nkode/util"
+)
+
+type Customer struct {
+	Id          CustomerId
+	NKodePolicy NKodePolicy
+	Attributes  CustomerAttributes
+}
+
+func NewCustomer(nkodePolicy NKodePolicy) (*Customer, error) {
+	customerAttrs, err := NewCustomerAttributes()
+	if err != nil {
+		return nil, err
+	}
+	customer := Customer{
+		Id:          CustomerId(uuid.New()),
+		NKodePolicy: nkodePolicy,
+		Attributes:  *customerAttrs,
+	}
+
+	return &customer, nil
+}
+
+func (c *Customer) IsValidNKode(kp KeypadDimension, passcodeAttrIdx []int) error {
+	nkodeLen := len(passcodeAttrIdx)
+	if nkodeLen < c.NKodePolicy.MinNkodeLen {
+		return errors.New(fmt.Sprintf("NKode length %d is too short. Minimum nKode length is %d", nkodeLen, c.NKodePolicy.MinNkodeLen))
+	}
+
+	validIdx := py.All[int](passcodeAttrIdx, func(i int) bool {
+		return i >= 0 && i < kp.TotalAttrs()
+	})
+
+	if !validIdx {
+		return errors.New(fmt.Sprintf("One or more idx out of range 0-%d in IsValidNKode", kp.TotalAttrs()-1))
+	}
+	passcodeSetVals := make(hashset.Set[uint64])
+	passcodeAttrVals := make(hashset.Set[uint64])
+	attrVals, err := c.Attributes.AttrValsForKp(kp)
+	if err != nil {
+		return err
+	}
+	for idx := 0; idx < nkodeLen; idx++ {
+		attrVal := attrVals[passcodeAttrIdx[idx]]
+		setVal, err := c.Attributes.GetAttrSetVal(attrVal, kp)
+		if err != nil {
+			return err
+		}
+		passcodeSetVals.Add(setVal)
+		passcodeAttrVals.Add(attrVal)
+	}
+
+	if passcodeSetVals.Size() < c.NKodePolicy.DistinctSets {
+		return errors.New(fmt.Sprintf("passcode has two few distinct sets min %d, has %d", c.NKodePolicy.DistinctSets, passcodeSetVals.Size()))
+	}
+
+	if passcodeAttrVals.Size() < c.NKodePolicy.DistinctAttributes {
+		return errors.New(fmt.Sprintf("passcode has two few distinct attributes min %d, has %d", c.NKodePolicy.DistinctAttributes, passcodeAttrVals.Size()))
+	}
+	return nil
+}
+
+func (c *Customer) RenewKeys() ([]uint64, []uint64) {
+	oldAttrs := make([]uint64, len(c.Attributes.AttrVals))
+	oldSets := make([]uint64, len(c.Attributes.SetVals))
+
+	copy(oldAttrs, c.Attributes.AttrVals)
+	copy(oldSets, c.Attributes.SetVals)
+
+	err := c.Attributes.Renew()
+	if err != nil {
+		panic(err)
+	}
+	attrsXor, err := util.XorLists(oldAttrs, c.Attributes.AttrVals)
+	if err != nil {
+		panic(err)
+	}
+	setXor, err := util.XorLists(oldSets, c.Attributes.SetVals)
+	if err != nil {
+		panic(err)
+	}
+	return setXor, attrsXor
+}