fix: accept string versions in paid reactions

pkg/line/reaction.go

@@ -61,6 +61,23 @@ type PaidReactionType struct {
 	Version      int    `json:"version,omitempty"`
 }
 
+func (p *PaidReactionType) UnmarshalJSON(data []byte) error {
+	var parsed struct {
+		ProductID    string  `json:"productId"`
+		EmojiID      string  `json:"emojiId"`
+		ResourceType int     `json:"resourceType,omitempty"`
+		Version      FlexInt `json:"version,omitempty"`
+	}
+	if err := json.Unmarshal(data, &parsed); err != nil {
+		return err
+	}
+	p.ProductID = parsed.ProductID
+	p.EmojiID = parsed.EmojiID
+	p.ResourceType = parsed.ResourceType
+	p.Version = parsed.Version.Val
+	return nil
+}
+
 type ReactionType struct {
 	PredefinedReactionType int               `json:"predefinedReactionType,omitempty"`
 	PaidReactionType       *PaidReactionType `json:"paidReactionType,omitempty"`

pkg/line/reaction_test.go

@@ -101,6 +101,30 @@ func TestCancelReactionRequestBody(t *testing.T) {
 	}
 }
 
+func TestGetRecentMessagesV2AcceptsPaidReactionStringVersion(t *testing.T) {
+	client := newReactionTestClientWithResponse(
+		t,
+		"/api/talk/thrift/Talk/TalkService/getRecentMessagesV2",
+		`{"code":0,"message":"ok","data":[
+			{"id":"newer"},
+			{"id":"affected","reactions":[{"fromUserMid":"U-paid","atMillis":"1784930400456","reactionType":{"paidReactionType":{"productId":"product","emojiId":"143","resourceType":1,"version":"1"}}}]}
+		]}`,
+		nil,
+	)
+
+	messages, err := client.GetRecentMessagesV2("U-chat", 50)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(messages) != 2 {
+		t.Fatalf("message count = %d, want 2", len(messages))
+	}
+	paid := messages[1].Reactions[0].ReactionType.PaidReactionType
+	if paid == nil || paid.Version != 1 {
+		t.Fatalf("paid reaction = %#v, want version 1", paid)
+	}
+}
+
 func TestReactNonZeroWrapperKeepsInvalidPaidReactionDetails(t *testing.T) {
 	client := newReactionTestClientWithResponse(t, "/api/talk/thrift/Talk/TalkService/react", `{"code":10051,"message":"RESPONSE_ERROR","data":{"name":"TalkException","message":"TalkException","code":0,"reason":"Invalid paidReactionType in reactionType","parameterMap":null}}`, nil)
 	err := client.React(123, "616934195205767730", ReactionType{

pkg/line/structs_test.go

@@ -64,7 +64,7 @@ func TestMessageUnmarshalsRecentMessageReactions(t *testing.T) {
 						"productId":"670e0cce840a8236ddd4ee4c",
 						"emojiId":"143",
 						"resourceType":1,
-						"version":1
+						"version":"1"
 					}
 				}
 			}
@@ -85,11 +85,22 @@ func TestMessageUnmarshalsRecentMessageReactions(t *testing.T) {
 	if paid.FromUserMID != "U-paid" || paid.AtMillis.String() != "1784930400456" ||
 		paid.ReactionType.PaidReactionType == nil ||
 		paid.ReactionType.PaidReactionType.ProductID != "670e0cce840a8236ddd4ee4c" ||
-		paid.ReactionType.PaidReactionType.EmojiID != "143" {
+		paid.ReactionType.PaidReactionType.EmojiID != "143" ||
+		paid.ReactionType.PaidReactionType.Version != 1 {
 		t.Fatalf("paid reaction = %#v", paid)
 	}
 }
 
+func TestPaidReactionTypeUnmarshalsNumericVersion(t *testing.T) {
+	var reaction PaidReactionType
+	if err := json.Unmarshal([]byte(`{"version":1}`), &reaction); err != nil {
+		t.Fatal(err)
+	}
+	if reaction.Version != 1 {
+		t.Fatalf("version = %d, want 1", reaction.Version)
+	}
+}
+
 func TestMessageDistinguishesMissingAndEmptyReactions(t *testing.T) {
 	var missing Message
 	if err := json.Unmarshal([]byte(`{"id":"missing"}`), &missing); err != nil {