impl some hands

src/game/rule/operation/int.go

@@ -1,5 +1,41 @@
 package operation
 
-import "local/sandbox/cards/src/entity"
+import (
+	"encoding/json"
+	"errors"
+	"local/sandbox/cards/src/entity"
+)
 
 type Int func(*entity.Game, interface{}) int
+
+var intStringified = map[string]Int{
+	"royalFlush":    royalFlush,
+	"straightFlush": straightFlush,
+	"fourOfAKind":   fourOfAKind,
+	"fullHouse":     fullHouse,
+	"flush":         flush,
+	"straight":      straight,
+	"threeOfAKind":  threeOfAKind,
+	"twoPair":       twoPair,
+	"pair":          pair,
+	"highCard":      highCard,
+}
+
+func (foo *Int) UnmarshalJSON(b []byte) error {
+	var s string
+	if err := json.Unmarshal(b, &s); err != nil {
+		return err
+	}
+
+	return foo.FromString(s)
+}
+
+func (foo *Int) FromString(s string) error {
+	for k, v := range intStringified {
+		if k == s {
+			*foo = v
+			return nil
+		}
+	}
+	return errors.New("unknown int method " + s)
+}