feat: update BlueBubbles documentation and code to clarify group icon handling and normalize chat identifiers

extensions/bluebubbles/src/probe.ts

@@ -6,6 +6,68 @@ export type BlueBubblesProbe = {
   error?: string | null;
 };
 
+export type BlueBubblesServerInfo = {
+  os_version?: string;
+  server_version?: string;
+  private_api?: boolean;
+  helper_connected?: boolean;
+  proxy_service?: string;
+  detected_icloud?: string;
+  computer_id?: string;
+};
+
+/** Cache server info to avoid repeated API calls */
+const serverInfoCache = new Map<string, { info: BlueBubblesServerInfo; expires: number }>();
+const CACHE_TTL_MS = 5 * 60 * 1000; // 5 minutes
+
+/**
+ * Fetch server info from BlueBubbles API.
+ * Returns cached result if available and not expired.
+ */
+export async function fetchBlueBubblesServerInfo(params: {
+  baseUrl?: string | null;
+  password?: string | null;
+  timeoutMs?: number;
+}): Promise<BlueBubblesServerInfo | null> {
+  const baseUrl = params.baseUrl?.trim();
+  const password = params.password?.trim();
+  if (!baseUrl || !password) return null;
+
+  const cacheKey = `${baseUrl}:${password}`;
+  const cached = serverInfoCache.get(cacheKey);
+  if (cached && cached.expires > Date.now()) {
+    return cached.info;
+  }
+
+  const url = buildBlueBubblesApiUrl({ baseUrl, path: "/api/v1/server/info", password });
+  try {
+    const res = await blueBubblesFetchWithTimeout(url, { method: "GET" }, params.timeoutMs ?? 5000);
+    if (!res.ok) return null;
+    const payload = (await res.json().catch(() => null)) as Record<string, unknown> | null;
+    const data = payload?.data as BlueBubblesServerInfo | undefined;
+    if (data) {
+      serverInfoCache.set(cacheKey, { info: data, expires: Date.now() + CACHE_TTL_MS });
+    }
+    return data ?? null;
+  } catch {
+    return null;
+  }
+}
+
+/**
+ * Parse macOS version string (e.g., "15.0.1" or "26.0") into major version number.
+ */
+export function parseMacOSMajorVersion(version?: string | null): number | null {
+  if (!version) return null;
+  const match = /^(\d+)/.exec(version.trim());
+  return match ? Number.parseInt(match[1], 10) : null;
+}
+
+/** Clear the server info cache (for testing) */
+export function clearServerInfoCache(): void {
+  serverInfoCache.clear();
+}
+
 export async function probeBlueBubbles(params: {
   baseUrl?: string | null;
   password?: string | null;