feat(Interactions): improve error handling for ephemeral responses (#5892)

Co-authored-by: muchnameless <12682826+muchnameless@users.noreply.github.com>

src/structures/CommandInteraction.js

@@ -58,6 +58,12 @@ class CommandInteraction extends Interaction {
      */
     this.replied = false;
 
+    /**
+     * Whether the reply to this interaction is ephemeral
+     * @type {?boolean}
+     */
+    this.ephemeral = null;
+
     /**
      * An associated interaction webhook, can be used to further interact with this interaction
      * @type {InteractionWebhook}

src/structures/MessageComponentInteraction.js

@@ -38,6 +38,12 @@ class MessageComponentInteraction extends Interaction {
      */
     this.deferred = false;
 
+    /**
+     * Whether the reply to this interaction is ephemeral
+     * @type {?boolean}
+     */
+    this.ephemeral = null;
+
     /**
      * Whether this interaction has already been replied to
      * @type {boolean}

src/structures/interfaces/InteractionResponses.js

@@ -39,6 +39,7 @@ class InteractionResponses {
    */
   async defer({ ephemeral } = {}) {
     if (this.deferred || this.replied) throw new Error('INTERACTION_ALREADY_REPLIED');
+    this.ephemeral = ephemeral ?? false;
     await this.client.api.interactions(this.id, this.token).callback.post({
       data: {
         type: InteractionResponseTypes.DEFERRED_CHANNEL_MESSAGE_WITH_SOURCE,
@@ -69,6 +70,7 @@ class InteractionResponses {
    */
   async reply(options) {
     if (this.deferred || this.replied) throw new Error('INTERACTION_ALREADY_REPLIED');
+    this.ephemeral = options.ephemeral ?? false;
 
     let apiMessage;
     if (options instanceof APIMessage) apiMessage = options;
@@ -97,6 +99,7 @@ class InteractionResponses {
    *   .catch(console.error);
    */
   fetchReply() {
+    if (this.ephemeral) throw new Error('INTERACTION_EPHEMERAL_REPLIED');
     return this.webhook.fetchMessage('@original');
   }
 
@@ -112,6 +115,7 @@ class InteractionResponses {
    *   .catch(console.error);
    */
   editReply(options) {
+    if (!this.deferred && !this.replied) throw new Error('INTERACTION_NOT_REPLIED');
     return this.webhook.editMessage('@original', options);
   }
 
@@ -126,6 +130,7 @@ class InteractionResponses {
    *   .catch(console.error);
    */
   async deleteReply() {
+    if (this.ephemeral) throw new Error('INTERACTION_EPHEMERAL_REPLIED');
     await this.webhook.deleteMessage('@original');
   }