feat: add plugin HTTP hooks + Zalo plugin

extensions/zalo/src/token.ts

@@ -0,0 +1,54 @@
+import { readFileSync } from "node:fs";
+
+import type { ZaloConfig } from "./types.js";
+import { DEFAULT_ACCOUNT_ID } from "./shared/account-ids.js";
+
+export type ZaloTokenResolution = {
+  token: string;
+  source: "env" | "config" | "configFile" | "none";
+};
+
+export function resolveZaloToken(
+  config: ZaloConfig | undefined,
+  accountId?: string | null,
+): ZaloTokenResolution {
+  const resolvedAccountId = accountId ?? DEFAULT_ACCOUNT_ID;
+  const isDefaultAccount = resolvedAccountId === DEFAULT_ACCOUNT_ID;
+  const baseConfig = config;
+  const accountConfig =
+    resolvedAccountId !== DEFAULT_ACCOUNT_ID
+      ? (baseConfig?.accounts?.[resolvedAccountId] as ZaloConfig | undefined)
+      : undefined;
+
+  if (accountConfig) {
+    const token = accountConfig.botToken?.trim();
+    if (token) return { token, source: "config" };
+    const tokenFile = accountConfig.tokenFile?.trim();
+    if (tokenFile) {
+      try {
+        const fileToken = readFileSync(tokenFile, "utf8").trim();
+        if (fileToken) return { token: fileToken, source: "configFile" };
+      } catch {
+        // ignore read failures
+      }
+    }
+  }
+
+  if (isDefaultAccount) {
+    const token = baseConfig?.botToken?.trim();
+    if (token) return { token, source: "config" };
+    const tokenFile = baseConfig?.tokenFile?.trim();
+    if (tokenFile) {
+      try {
+        const fileToken = readFileSync(tokenFile, "utf8").trim();
+        if (fileToken) return { token: fileToken, source: "configFile" };
+      } catch {
+        // ignore read failures
+      }
+    }
+    const envToken = process.env.ZALO_BOT_TOKEN?.trim();
+    if (envToken) return { token: envToken, source: "env" };
+  }
+
+  return { token: "", source: "none" };
+}