feat: Backport sending message flags (#7560)

src/structures/MessagePayload.js

@@ -148,11 +148,17 @@ class MessagePayload {
     }
 
     let flags;
-    if ((this.isMessage && typeof this.options.reply === 'undefined') || this.isMessageManager) {
+    if (
+      typeof this.options.flags !== 'undefined' ||
+      (this.isMessage && typeof this.options.reply === 'undefined') ||
+      this.isMessageManager
+    ) {
       // eslint-disable-next-line eqeqeq
       flags = this.options.flags != null ? new MessageFlags(this.options.flags).bitfield : this.target.flags?.bitfield;
-    } else if (isInteraction && this.options.ephemeral) {
-      flags = MessageFlags.FLAGS.EPHEMERAL;
+    }
+
+    if (isInteraction && this.options.ephemeral) {
+      flags |= MessageFlags.FLAGS.EPHEMERAL;
     }
 
     let allowedMentions =

src/structures/Webhook.js

@@ -116,6 +116,7 @@ class Webhook {
    * @property {string} [avatarURL] Avatar URL override for the message
    * @property {Snowflake} [threadId] The id of the thread in the channel to send to.
    * <info>For interaction webhooks, this property is ignored</info>
+   * @property {MessageFlags} [flags] Which flags to set for the message. Only `SUPPRESS_EMBEDS` can be set.
    */
 
   /**

src/structures/interfaces/InteractionResponses.js

@@ -28,6 +28,8 @@ class InteractionResponses {
    * @typedef {BaseMessageOptions} InteractionReplyOptions
    * @property {boolean} [ephemeral] Whether the reply should be ephemeral
    * @property {boolean} [fetchReply] Whether to fetch the reply
+   * @property {MessageFlags} [flags] Which flags to set for the message.
+   * Only `SUPPRESS_EMBEDS` and `EPHEMERAL` can be set.
    */
 
   /**

src/structures/interfaces/TextBasedChannel.js

@@ -73,6 +73,7 @@ class TextBasedChannel {
    * @typedef {BaseMessageOptions} MessageOptions
    * @property {ReplyOptions} [reply] The options for replying to a message
    * @property {StickerResolvable[]} [stickers=[]] Stickers to send in the message
+   * @property {MessageFlags} [flags] Which flags to set for the message. Only `SUPPRESS_EMBEDS` can be set.
    */
 
   /**