SetAttachmentsを使わない場合にAttachmentsを消去するように変更

Author: mohemohe

message.go

@@ -13,6 +13,8 @@ type (
 		Message Message `json:"message"`
 		Mode    string  `json:"mode"`
 		Raw     interface{} `json:"raw"`
+
+		shouldKeepAttachments bool
 	}
 	pack struct {
 		User    User    `json:"user"`
@@ -55,6 +57,7 @@ func NewLXMessage(msg M) (*LXMessage, error) {
 		Message: pack.Message,
 		Mode: "",
 		Raw: pack.Raw,
+		shouldKeepAttachments: false,
 	}, nil
 }
 
@@ -63,6 +66,12 @@ func (this *LXMessage) SetText(text string) *LXMessage {
 	return this
 }
 
+func (this *LXMessage) SetAttachments(attachments []Attachment) *LXMessage {
+	this.Message.Attachments = attachments
+	this.shouldKeepAttachments = true
+	return this
+}
+
 func (this *LXMessage) Send() *LXMessage {
 	this.Mode = "send"
 	return this
@@ -79,7 +88,11 @@ func (this *LXMessage) ToMap() (M, error) {
 		return nil, err
 	}
 
-	r["message"].(M)["attachments"], err = toArrayMap(this.Message.Attachments)
+	if this.shouldKeepAttachments {
+		r["message"].(M)["attachments"], err = toArrayMap(this.Message.Attachments)
+	} else {
+		r["message"].(M)["attachments"] = []map[string]interface{}{}
+	}
 	return r, err
 }