Spoiler posts in spoiler tags

src/utils/index.ts

@@ -5,9 +5,9 @@ export * from './ban-utils';
 export * from './channel-utils';
 export * from './commands';
 export * from './e621-utils';
+export * from './event-log-utils';
 export * from './file-utils';
 export * from './interaction-utils';
-export * from './event-log-utils';
 export * from './message-utils';
 export * from './ms-to-human';
 export * from './note-utils';

src/utils/message-utils.ts

@@ -3,6 +3,8 @@ import { LoggedMessage } from '../types';
 
 export const ARRAY_SEPARATOR = '$';
 
+const spoilerRegex = new RegExp('\\|\\|((?:[\\S]| )+?)\\|\\|', 'gi');
+
 export function serializeMessage(message: Message): string[] {
   const attachments = message.attachments.map(a => `${a.name}:${a.id}`);
   const stickers = message.stickers.map(s => `${s.name}:${s.id}`);
@@ -40,4 +42,19 @@ export function isEdited(loggedMessage: LoggedMessage, newMessage: Message) {
   const { addedStickers, removedStickers } = getModifiedStickers(loggedMessage, newMessage);
 
   return addedStickers.length > 0 || removedStickers.length > 0;
+}
+
+export function isInSpoilerTags(content: string, index: number): boolean {
+  if (!content.includes('||')) return false;
+
+  let match: RegExpExecArray | null;
+  while ((match = spoilerRegex.exec(content)) != null) {
+    if (index >= match.index && index <= spoilerRegex.lastIndex) {
+      spoilerRegex.lastIndex = 0;
+      return true;
+    }
+  }
+
+  spoilerRegex.lastIndex = 0;
+  return false;
 }