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/http-routes/api/create-call.js

@@ -85,6 +85,20 @@ router.post('/', async(req, res) => {
       }
     }
 
+    /**
+     * trunk isn't specified,
+     * check if from-number matches any existing numbers on Jambonz
+     *  */
+    if (target.type === 'phone' && !target.trunk) {
+      const {lookupCarrierByPhoneNumber} = dbUtils(this.logger, srf);
+      const voip_carrier_sid = await lookupCarrierByPhoneNumber(req.body.account_sid, restDial.from);
+      logger.info(
+        `createCall: selected ${voip_carrier_sid} for requested phone number: ${restDial.from || 'unspecified'})`);
+      if (voip_carrier_sid) {
+        opts.headers['X-Requested-Carrier-Sid'] = voip_carrier_sid;
+      }
+    }
+
     /* create endpoint for outdial */
     const ms = getFreeswitch();
     if (!ms) throw new Error('no available Freeswitch for outbound call creation');

lib/tasks/dial.js

@@ -397,7 +397,7 @@ class TaskDial extends Task {
     const {req, srf} = cs;
     const {getSBC} = srf.locals;
     const {lookupTeamsByAccount, lookupAccountBySid} = srf.locals.dbHelpers;
-    const {lookupCarrier} = dbUtils(this.logger, cs.srf);
+    const {lookupCarrier, lookupCarrierByPhoneNumber} = dbUtils(this.logger, cs.srf);
     const sbcAddress = this.proxy || getSBC();
     const teamsInfo = {};
     let fqdn;
@@ -462,6 +462,19 @@ class TaskDial extends Task {
           }
         }
 
+        /**
+         * trunk isn't specified,
+         * check if number matches any existing numbers
+         *  */
+        if (t.type === 'phone' && !t.trunk) {
+          const voip_carrier_sid = await lookupCarrierByPhoneNumber(req.body.account_sid, t.number);
+          this.logger.info(
+            `Dial:_attemptCalls: selected ${voip_carrier_sid} for requested phone number: ${t.number})`);
+          if (voip_carrier_sid) {
+            opts.headers['X-Requested-Carrier-Sid'] = voip_carrier_sid;
+          }
+        }
+
         if (this.killed) return;
 
         const sd = placeCall({

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
   };
 };