From 5cec22b2e8782d11e55f22ece832a1572d8ba598 Mon Sep 17 00:00:00 2001
From: Skylar Ittner <skylar@netsyms.com>
Date: Wed, 16 Jun 2021 14:56:45 -0600
Subject: [PATCH] Add support for multiple texting numbers

---
 main.js | 54 +++++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 39 insertions(+), 15 deletions(-)

diff --git a/main.js b/main.js
index 46b5694..4fc182f 100644
--- a/main.js
+++ b/main.js
@@ -32,6 +32,20 @@ logger.info("Log initialized.");
 
 var initialsynccomplete = false;
 
+/**
+ * From https://github.com/stevekinney/node-phone-formatter
+ * @param {type} phoneNumber
+ * @param {type} formatString
+ * @param {type} options
+ * @returns {unresolved}
+ */
+function formatPhoneNumber(phoneNumber, formatString) {
+    for (var i = 0, l = phoneNumber.length; i < l; i++) {
+        formatString = formatString.replace("N", phoneNumber[i]);
+    }
+    return formatString;
+}
+
 function checkSMS() {
     logger.debug("Checking SMS");
 
@@ -59,7 +73,7 @@ function checkSMS() {
                     var msg = messages[i];
                     if (settings.smsonlyto.length > 0 && settings.smsonlyto.indexOf(msg.to) != -1) {
                         logger.info("Received SMS from " + msg.from + " for " + msg.to + ": " + msg.body);
-                        createOrJoinSMSRoom(msg.from, function (roomid) {
+                        createOrJoinSMSRoom(msg.from, msg.to, function (roomid) {
                             sendMatrix(roomid, msg.body, msg.media);
                         });
                     } else {
@@ -83,13 +97,15 @@ function checkSMS() {
 /**
  * Join or create+join a room with alias #SMS_{tel}. If already joined, do nothing.
  * @param {string} tel
+ * @param {string} ournumber the phone number Matrix messages will be sent from for this room
  * @param {function} callback function with the room ID as an argument.
  * @returns {undefined}
  */
-function createOrJoinSMSRoom(tel, callback) {
-    logger.debug("Checking if room #SMS_" + tel + ":" + settings.matrixdomain + " exists.");
-    client.getRoomIdForAlias("#SMS_" + tel + ":" + settings.matrixdomain).then((res) => {
-        logger.debug("Room #SMS_" + tel + ":" + settings.matrixdomain + " exists!");
+function createOrJoinSMSRoom(tel, ournumber, callback) {
+    var roomName = "#SMS_" + tel + "_" + ournumber + ":" + settings.matrixdomain;
+    logger.debug("Checking if room " + roomName + " exists.");
+    client.getRoomIdForAlias(roomName).then((res) => {
+        logger.debug("Room " + roomName + " exists!");
         var inRoom = false;
         var rooms = client.getRooms();
         for (var i = 0; i < rooms.length; i++) {
@@ -100,31 +116,31 @@ function createOrJoinSMSRoom(tel, callback) {
         }
         if (inRoom) {
             // we're already in the room, do nothing
-            logger.debug("Room #SMS_" + tel + ":" + settings.matrixdomain + " already joined.");
+            logger.debug("Room " + roomName + " already joined.");
             callback(res.room_id);
         } else {
             // not in the room, join it
             client.joinRoom(res.room_id).then((room) => {
-                logger.debug("Room #SMS_" + tel + ":" + settings.matrixdomain + " joined.");
+                logger.debug("Room " + roomName + " joined.");
                 callback(room.room_id);
             });
         }
     }).catch((err) => {
         // room doesn't exist, create it
         //logger.debug(err);
-        logger.debug("Room #SMS_" + tel + ":" + settings.matrixdomain + " does not exist. Creating it now.");
+        logger.debug("Room " + roomName + " does not exist. Creating it now.");
         client.createRoom({
-            room_alias_name: "SMS_" + tel,
+            room_alias_name: "SMS_" + tel + "_" + ournumber,
             visibility: "private",
             invite: settings.inviteusers,
-            name: "SMS: " + tel,
-            topic: "SMS conversation with " + tel
+            name: formatPhoneNumber(tel),
+            topic: "SMS conversation with " + tel + " (using " + ournumber + ")"
         }).then((room) => {
-            logger.debug("Room #SMS_" + tel + ":" + settings.matrixdomain + " created with ID " + room.room_id);
+            logger.debug("Room" + roomName + " created with ID " + room.room_id);
 
             // The first message or two we send doesn't go through unless we do this.
             // It just spits out "Error sending event M_FORBIDDEN: Unknown room" instead.
-            createOrJoinSMSRoom(tel, callback);
+            createOrJoinSMSRoom(tel, ournumber, callback);
         });
     });
 }
@@ -316,15 +332,23 @@ client.login("m.login.password", {"user": settings.matrixuser, "password": setti
         if (event.getContent().body.startsWith("!sms")) {
             // capture command to start room for new number
             const matches = event.getContent().body.match(/([1-9]?[0-9]{10})/g);
-            if (matches.length == 1) {
+            if (matches.length == 1 || matches.length == 2) {
                 var tel = matches[0];
+                var ournumber = settings.smsfrom;
                 if (tel.length == 10) {
                     // make it the full number
                     tel = "1" + tel;
                 }
+                if (matches.length == 2) {
+                    ournumber = matches[1];
+                    if (ournumber.length == 10) {
+                        // make it the full number
+                        ournumber = "1" + ournumber;
+                    }
+                }
                 logger.info("Got request to start new SMS conversation with " + tel + " from " + event.getSender() + ".");
                 sendMatrixNotice(event.getRoomId(), "Starting new conversation with " + tel);
-                createOrJoinSMSRoom(tel, function () {
+                createOrJoinSMSRoom(tel, ournumber, function () {
                     return;
                 });
             }