SnowLuma v2.4.2 source snapshot

packages/onebot/src/message-id.ts

@@ -0,0 +1,31 @@
+import { createHash } from 'node:crypto';
+
+export const GROUP_MESSAGE_EVENT = 'group_message';
+export const PRIVATE_MESSAGE_EVENT = 'private_message';
+/** Legacy/fallback namespace for private messages sent by the current account. */
+export const PRIVATE_SENT_MESSAGE_EVENT = 'private_message_sent';
+/** Namespace for private messages keyed by QQ's conversation-wide NT sequence. */
+export const PRIVATE_NT_MESSAGE_EVENT = 'private_message_nt';
+
+export function privateMessageEventName(sentBySelf: boolean, hasNtSequence: boolean): string {
+    if (hasNtSequence) {
+        return PRIVATE_NT_MESSAGE_EVENT;
+    }
+
+    return sentBySelf ? PRIVATE_SENT_MESSAGE_EVENT : PRIVATE_MESSAGE_EVENT;
+}
+
+export function hashMessageIdInt32(sequence: number, sessionId: number, eventName: string): number {
+    const seq = Number.isFinite(sequence) ? Math.trunc(sequence) : 0;
+    const session = Number.isFinite(sessionId) ? Math.trunc(sessionId) : 0;
+    const key = `${seq}:${session}:${eventName}`;
+    const digest = createHash('sha1').update(key).digest();
+
+    let id = digest.readInt32BE(0);
+
+    if (id === 0) {
+        id = 1;
+    }
+
+    return id;
+}