feat get registered client status (#251)

lib/routes/api/accounts.js

@@ -145,6 +145,7 @@ router.post('/:sid/VoipCarriers', async(req, res) => {
     sysError(logger, res, err);
   }
 });
+
 router.get('/:sid/RegisteredSipUsers', async(req, res) => {
   const {logger, registrar} = req.app.locals;
   try {
@@ -161,6 +162,29 @@ router.get('/:sid/RegisteredSipUsers', async(req, res) => {
   }
 });
 
+router.get('/:sid/RegisteredSipUsers/:client', async(req, res) => {
+  const {logger, registrar} = req.app.locals;
+  const client = req.params.client;
+  try {
+    const account_sid = parseAccountSid(req);
+    await validateRequest(req, account_sid);
+    const result = await Account.retrieve(account_sid);
+    if (!result || result.length === 0) {
+      throw new DbErrorBadRequest(`account not found for sid ${account_sid}`);
+    }
+    const user = await registrar.query(`${client}@${result[0].sip_realm}`);
+    res.status(200).json({
+      name: client,
+      contact: user ? user.contact : null,
+      expiryTime: user ? user.expiryTime : 0,
+      protocol: user ? user.protocol : null,
+      registered_status: user ? 'active' : 'inactive'
+    });
+  } catch (err) {
+    sysError(logger, res, err);
+  }
+});
+
 function coerceNumbers(callInfo) {
   if (Array.isArray(callInfo)) {
     return callInfo.map((ci) => {