error handling

dist/espthermtojson.js

@@ -1,6 +1,13 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
+const log = require("./log");
 const utils = require("./utils");
+class EspThermError extends Error {
+    constructor(message) {
+        super(message);
+    }
+}
+exports.EspThermError = EspThermError;
 class EspThermData {
     constructor(temperature, voltage, timeConsumed) {
         this.temperature = temperature;
@@ -44,7 +51,24 @@ exports.EspThermMessage = EspThermMessage;
 function espThermToJson(message) {
     let messageStr = "" + message;
     let parts = messageStr.split(' ');
-    let espThermMessage = new EspThermMessage(parts[0], parseFloat(parts[1]), parseFloat(parts[2]), parseInt(parts[3]));
+    if (parts.length != 4) {
+        throw new EspThermError(`too few or too much, ${parts.length} elements in message, it was "${message}"`);
+    }
+    let clientId = parts[0];
+    let temperature = parseFloat(parts[1]);
+    log.info(`temperature: ${temperature}`);
+    if ((typeof (temperature) != "number") || (temperature == null) || isNaN(temperature)) {
+        throw new EspThermError(`temperature element should be a number, message was "${message}"`);
+    }
+    let voltage = parseFloat(parts[2]);
+    if ((typeof (voltage) != "number") || (voltage == null) || isNaN(voltage)) {
+        throw new EspThermError(`voltage element should be a number, message was "${message}"`);
+    }
+    let timeConsumed = parseInt(parts[3]);
+    if ((typeof (timeConsumed) != "number") || (timeConsumed == null) || isNaN(timeConsumed)) {
+        throw new EspThermError(`timeConsumed element should be a number, message was "${message}"`);
+    }
+    let espThermMessage = new EspThermMessage(clientId, temperature, voltage, timeConsumed);
     return espThermMessage;
 }
 exports.espThermToJson = espThermToJson;