From 914d60ca25def8805b7fb2dafcab17474e08cc87 Mon Sep 17 00:00:00 2001
From: James Barnett <noreply@jamesbarnett.xyz>
Date: Fri, 30 Mar 2018 22:02:12 +0100
Subject: Poll for realtime usage updates

---
 routes/energy-usage.js | 24 ++++++++++++++++++++++++
 routes/index.js        | 29 ++++++-----------------------
 2 files changed, 30 insertions(+), 23 deletions(-)
 create mode 100644 routes/energy-usage.js

(limited to 'routes')

diff --git a/routes/energy-usage.js b/routes/energy-usage.js
new file mode 100644
index 0000000..847248d
--- /dev/null
+++ b/routes/energy-usage.js
@@ -0,0 +1,24 @@
+const express = require('express');
+const router = express.Router();
+
+const deviceManager = require('../services/device-manager');
+
+router.get('/:deviceId/realtime', function(req, res, next) {
+  
+  let deviceId = req.params.deviceId;
+
+  let realtimeUsage = {};
+  // TODO - cache results with a short TTL so we don't hammer the plug if multiple clients are requesting data
+  deviceManager.getDevice(deviceId).emeter.getRealtime().then(response => {
+
+    // Voltage seems to be reported as its peak to peak voltage, not RMS.
+    // Show the RMS value since thats what would you expect to see.
+    // i.e. 220v not 310v (in the U.K)
+    response.voltage = response.voltage / Math.sqrt(2);
+
+    res.json(response);
+  });
+
+});
+
+module.exports = router;
\ No newline at end of file
diff --git a/routes/index.js b/routes/index.js
index d1d0519..1dba277 100644
--- a/routes/index.js
+++ b/routes/index.js
@@ -1,30 +1,13 @@
-var express = require('express');
-var router = express.Router();
+const express = require('express');
+const router = express.Router();
 
-const { Client } = require('tplink-smarthome-api');
-
-const client = new Client();
-var devices = [];
-
-client.startDiscovery({deviceTypes: ['plug']}).on('plug-new', plug => {
-  console.log('Found device: ' + plug.alias + ' [' + plug.deviceId + ']');
-  devices.push(plug);
-})
+const deviceManager = require('../services/device-manager');
 
 router.get('/', function(req, res, next) {
 
-  let realtimeUsage = {};
-  devices[0].emeter.getRealtime().then(response => {
-
-    realtimeUsage.power = Math.round(response.power);
-    realtimeUsage.current = response.current.toFixed(2);
-    realtimeUsage.voltage = Math.round(response.voltage);
-
-    res.render('index',{
-      device: devices[0],
-      devices: devices,
-      realtimeUsage: realtimeUsage
-      });
+  res.render('index', {
+    device: deviceManager.getDevice(),
+    devices: deviceManager.getAllDevices()
   });
 
 });
-- 
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