Initial commit.

src/utils/message-utils.ts

@@ -0,0 +1,43 @@
+import { Message } from '../events';
+import { LoggedMessage } from '../types';
+
+export const ARRAY_SEPARATOR = '$';
+
+export function serializeMessage(message: Message): string[] {
+  const attachments = message.attachments.map(a => `${a.name}:${a.id}`);
+  const stickers = message.stickers.map(s => `${s.name}:${s.id}`);
+
+  return [message.id, message.author.id, message.author.username, message.channelId, attachments.join(ARRAY_SEPARATOR), stickers.join(ARRAY_SEPARATOR), message.content];
+}
+
+export function deserializeMessagePart(part: string): string[] {
+  return part.split(ARRAY_SEPARATOR).filter(e => e);
+}
+
+export function getModifiedAttachments(loggedMessage: LoggedMessage, newMessage: Message): { addedAttachments: string[], removedAttachments: string[] } {
+  const loggedAttachments = loggedMessage.attachments.split(ARRAY_SEPARATOR).filter(e => e);
+  const addedAttachments = newMessage.attachments.filter(a => !loggedAttachments.includes(`${a.name}:${a.id}`)).map(a => `${a.name}:${a.id}`);
+  const removedAttachments = loggedAttachments.filter(a => !newMessage.attachments.has(a.split(':').at(-1)!));
+
+  return { addedAttachments, removedAttachments };
+}
+
+export function getModifiedStickers(loggedMessage: LoggedMessage, newMessage: Message): { addedStickers: string[], removedStickers: string[] } {
+  const loggedStickers = loggedMessage.stickers.split(ARRAY_SEPARATOR).filter(e => e);
+  const addedStickers = newMessage.stickers.filter(s => !loggedStickers.includes(`${s.name}:${s.id}`)).map(s => `${s.name}:${s.id}`);
+  const removedStickers = loggedStickers.filter(s => !newMessage.stickers.has(s.split(':').at(-1)!));
+
+  return { addedStickers, removedStickers };
+}
+
+export function isEdited(loggedMessage: LoggedMessage, newMessage: Message) {
+  if (newMessage.content != loggedMessage.content) return true;
+
+  const { addedAttachments, removedAttachments } = getModifiedAttachments(loggedMessage, newMessage);
+
+  if (addedAttachments.length > 0 || removedAttachments.length > 0) return true;
+
+  const { addedStickers, removedStickers } = getModifiedStickers(loggedMessage, newMessage);
+
+  return addedStickers.length > 0 || removedStickers.length > 0;
+}