fix: dedupe inbound messages across providers

src/auto-reply/reply/inbound-dedupe.ts

@@ -0,0 +1,52 @@
+import { logVerbose, shouldLogVerbose } from "../../globals.js";
+import { createDedupeCache, type DedupeCache } from "../../infra/dedupe.js";
+import type { MsgContext } from "../templating.js";
+
+const DEFAULT_INBOUND_DEDUPE_TTL_MS = 20 * 60_000;
+const DEFAULT_INBOUND_DEDUPE_MAX = 5000;
+
+const inboundDedupeCache = createDedupeCache({
+  ttlMs: DEFAULT_INBOUND_DEDUPE_TTL_MS,
+  maxSize: DEFAULT_INBOUND_DEDUPE_MAX,
+});
+
+const normalizeProvider = (value?: string | null) =>
+  value?.trim().toLowerCase() || "";
+
+const resolveInboundPeerId = (ctx: MsgContext) =>
+  ctx.OriginatingTo ?? ctx.To ?? ctx.From ?? ctx.SessionKey;
+
+export function buildInboundDedupeKey(ctx: MsgContext): string | null {
+  const provider = normalizeProvider(
+    ctx.OriginatingChannel ?? ctx.Provider ?? ctx.Surface,
+  );
+  const messageId = ctx.MessageSid?.trim();
+  if (!provider || !messageId) return null;
+  const peerId = resolveInboundPeerId(ctx);
+  if (!peerId) return null;
+  const sessionKey = ctx.SessionKey?.trim() ?? "";
+  const accountId = ctx.AccountId?.trim() ?? "";
+  const threadId =
+    typeof ctx.MessageThreadId === "number" ? String(ctx.MessageThreadId) : "";
+  return [provider, accountId, sessionKey, peerId, threadId, messageId]
+    .filter(Boolean)
+    .join("|");
+}
+
+export function shouldSkipDuplicateInbound(
+  ctx: MsgContext,
+  opts?: { cache?: DedupeCache; now?: number },
+): boolean {
+  const key = buildInboundDedupeKey(ctx);
+  if (!key) return false;
+  const cache = opts?.cache ?? inboundDedupeCache;
+  const skipped = cache.check(key, opts?.now);
+  if (skipped && shouldLogVerbose()) {
+    logVerbose(`inbound dedupe: skipped ${key}`);
+  }
+  return skipped;
+}
+
+export function resetInboundDedupe(): void {
+  inboundDedupeCache.clear();
+}