Reuse status dashboard message and simplify settings actions

src/status-dashboard.ts

@@ -2,7 +2,7 @@ import fs from 'fs';
 import path from 'path';
 
 import { CACHE_DIR } from './config.js';
-import { writeJsonFile } from './utils.js';
+import { readJsonFile, writeJsonFile } from './utils.js';
 import type { GroupStatus } from './group-queue.js';
 import type { AgentType } from './types.js';
 
@@ -37,6 +37,61 @@ export interface StatusSnapshot {
 }
 
 const STATUS_SNAPSHOT_DIR = path.join(CACHE_DIR, 'status-dashboard');
+const STATUS_MESSAGE_STATE_DIR = path.join(STATUS_SNAPSHOT_DIR, 'messages');
+
+interface StatusMessageState {
+  messageId: string;
+  statusChannelId: string;
+  updatedAt: string;
+}
+
+function sanitizeStatusChannelId(statusChannelId: string): string {
+  return statusChannelId.replace(/[^a-zA-Z0-9_-]/g, '_');
+}
+
+function getStatusMessageStatePath(statusChannelId: string): string {
+  return path.join(
+    STATUS_MESSAGE_STATE_DIR,
+    `${sanitizeStatusChannelId(statusChannelId)}.json`,
+  );
+}
+
+export function readDashboardStatusMessageId(
+  statusChannelId: string,
+): string | null {
+  if (!statusChannelId) return null;
+  const parsed = readJsonFile<StatusMessageState>(
+    getStatusMessageStatePath(statusChannelId),
+  );
+  if (
+    parsed?.statusChannelId !== statusChannelId ||
+    typeof parsed.messageId !== 'string' ||
+    parsed.messageId.trim() === ''
+  ) {
+    return null;
+  }
+  return parsed.messageId;
+}
+
+export function writeDashboardStatusMessageId(
+  statusChannelId: string,
+  messageId: string,
+): void {
+  if (!statusChannelId || !messageId) return;
+  fs.mkdirSync(STATUS_MESSAGE_STATE_DIR, { recursive: true });
+  const targetPath = getStatusMessageStatePath(statusChannelId);
+  const tempPath = `${targetPath}.tmp`;
+  writeJsonFile(
+    tempPath,
+    {
+      messageId,
+      statusChannelId,
+      updatedAt: new Date().toISOString(),
+    } satisfies StatusMessageState,
+    true,
+  );
+  fs.renameSync(tempPath, targetPath);
+}
 
 export function writeStatusSnapshot(snapshot: StatusSnapshot): void {
   fs.mkdirSync(STATUS_SNAPSHOT_DIR, { recursive: true });