use generic differ for netip.Addr and netip.Prefix

Signed-off-by: bcmmbaga <bethuelmbaga12@gmail.com>

management/server/differs/netip.go

@@ -0,0 +1,82 @@
+package differs
+
+import (
+	"fmt"
+	"net/netip"
+	"reflect"
+
+	"github.com/r3labs/diff/v3"
+)
+
+// NetIPAddr is a custom differ for netip.Addr
+type NetIPAddr struct {
+	DiffFunc func(path []string, a, b reflect.Value, p interface{}) error
+}
+
+func (differ NetIPAddr) Match(a, b reflect.Value) bool {
+	return diff.AreType(a, b, reflect.TypeOf(netip.Addr{}))
+}
+
+func (differ NetIPAddr) Diff(_ diff.DiffType, _ diff.DiffFunc, cl *diff.Changelog, path []string, a, b reflect.Value, _ interface{}) error {
+	if a.Kind() == reflect.Invalid {
+		cl.Add(diff.CREATE, path, nil, b.Interface())
+		return nil
+	}
+
+	if b.Kind() == reflect.Invalid {
+		cl.Add(diff.DELETE, path, a.Interface(), nil)
+		return nil
+	}
+
+	fromAddr, ok1 := a.Interface().(netip.Addr)
+	toAddr, ok2 := b.Interface().(netip.Addr)
+	if !ok1 || !ok2 {
+		return fmt.Errorf("invalid type for netip.Addr")
+	}
+
+	if fromAddr.String() != toAddr.String() {
+		cl.Add(diff.UPDATE, path, fromAddr.String(), toAddr.String())
+	}
+
+	return nil
+}
+
+func (differ NetIPAddr) InsertParentDiffer(dfunc func(path []string, a, b reflect.Value, p interface{}) error) {
+	differ.DiffFunc = dfunc //nolint
+}
+
+// NetIPPrefix is a custom differ for netip.Prefix
+type NetIPPrefix struct {
+	DiffFunc func(path []string, a, b reflect.Value, p interface{}) error
+}
+
+func (differ NetIPPrefix) Match(a, b reflect.Value) bool {
+	return diff.AreType(a, b, reflect.TypeOf(netip.Prefix{}))
+}
+
+func (differ NetIPPrefix) Diff(_ diff.DiffType, _ diff.DiffFunc, cl *diff.Changelog, path []string, a, b reflect.Value, _ interface{}) error {
+	if a.Kind() == reflect.Invalid {
+		cl.Add(diff.CREATE, path, nil, b.Interface())
+		return nil
+	}
+	if b.Kind() == reflect.Invalid {
+		cl.Add(diff.DELETE, path, a.Interface(), nil)
+		return nil
+	}
+
+	fromPrefix, ok1 := a.Interface().(netip.Prefix)
+	toPrefix, ok2 := b.Interface().(netip.Prefix)
+	if !ok1 || !ok2 {
+		return fmt.Errorf("invalid type for netip.Addr")
+	}
+
+	if fromPrefix.String() != toPrefix.String() {
+		cl.Add(diff.UPDATE, path, fromPrefix.String(), toPrefix.String())
+	}
+
+	return nil
+}
+
+func (differ NetIPPrefix) InsertParentDiffer(dfunc func(path []string, a, b reflect.Value, p interface{}) error) {
+	differ.DiffFunc = dfunc //nolint
+}