createCall: add a default behavior if the trunk isn't defined (#230)

* add methods to lookupTrunkbyPhone

* change the object name

* fix typo in readme

* export method with return

* add checks to dial verb

* sans extra spaces

* change the variable name for lookup

lib/utils/db-utils.js

@@ -20,6 +20,16 @@ WHERE vc.account_sid IS NULL
 AND vc.service_provider_sid = 
 (SELECT service_provider_sid from accounts where account_sid = ?) 
 AND vc.name = ?`;
+const sqlQueryAccountPhoneNumber = `SELECT voip_carrier_sid 
+FROM phone_numbers pn
+WHERE pn.account_sid = ?
+AND pn.number = ?`;
+const sqlQuerySPPhoneNumber = `SELECT voip_carrier_sid  
+FROM phone_numbers pn 
+WHERE pn.account_sid IS NULL 
+AND pn.service_provider_sid = 
+(SELECT service_provider_sid from accounts where account_sid = ?) 
+AND pn.number = ?`;
 
 const speechMapper = (cred) => {
   const {credential, ...obj} = cred;
@@ -128,9 +138,22 @@ module.exports = (logger, srf) => {
     }
   };
 
+  const lookupCarrierByPhoneNumber = async(account_sid, phoneNumber) => {
+    const pp = pool.promise();
+    try {
+      const [r] = await pp.query(sqlQueryAccountPhoneNumber, [account_sid, phoneNumber]);
+      if (r.length) return r[0].voip_carrier_sid;
+      const [r2] = await pp.query(sqlQuerySPPhoneNumber, [account_sid, phoneNumber]);
+      if (r2.length) return r2[0].voip_carrier_sid;
+    } catch (err) {
+      logger.error({err}, `lookupPhoneNumber: Error ${account_sid}:${phoneNumber}`);
+    }
+  };
+
   return {
     lookupAccountDetails,
     updateSpeechCredentialLastUsed,
-    lookupCarrier
+    lookupCarrier,
+    lookupCarrierByPhoneNumber
   };
 };