From e564f8a139b2ab5fcc2df5195234073045e34c08 Mon Sep 17 00:00:00 2001
From: nicobo <nicobo@noreply.users.github.com>
Date: Wed, 9 Jun 2021 23:25:19 +0200
Subject: [PATCH] + on/off sync scenario

---
 README.md                   | 14 ++++++++
 scripts/standby-together.js | 66 +++++++++++++++++++++++++++++++++++++
 2 files changed, 80 insertions(+)
 create mode 100644 scripts/standby-together.js

diff --git a/README.md b/README.md
index 7c1ad12..9177246 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,20 @@ On the command line, use `-s scripts/sync-volume.js` to enable this script and u
 Top-level options (e.g. `--source`) and configuration file are also valid (see instructions below).
 
 
+### Sync standby mode of several devices
+
+It sometimes happens that wirelessly-linked devices don't go to standby mode or don't awake together with the main one.
+It may be a bug or a reliability issue with network protocols ; however the result is that this forces you to physically put them on/off.
+
+This script will automatically forces a given list of devices to power on or off following the main device power status.
+
+On the command line, use `-s scripts/standby-together.js` to enable this script and use the following options :
+- `--conf.standby-together.source` sets the hostname or IP address of the *master* receiver
+- `--conf.standby-together.target` lists the *slave* devices that will follow the master's power status. You can separate them with a space or pass the option several times.
+
+Top-level options (e.g. `--source`) and configuration file are also valid (see instructions below).
+
+
 ## Command line usage
 
 This program requires [Node.js](https://nodejs.org) to run.
diff --git a/scripts/standby-together.js b/scripts/standby-together.js
new file mode 100644
index 0000000..2c231b7
--- /dev/null
+++ b/scripts/standby-together.js
@@ -0,0 +1,66 @@
+const log = require('../logging');
+const YamahaYXC = require('yamaha-yxc-nodejs');
+
+module.exports = class Scenario {
+
+  /**
+    Expects a configuration in the form :
+
+    {
+      "source": <hostname/ip of the MusicCast device to listen to standby status changes>,
+      "target": [ <list of hostname/ip of the MC devices to put on/off following the source device status>  ]
+
+    E.g. { "source": "192.168.1.42", "target": [ "192.168.1.43", "192.168.1.44" ] }
+  */
+  constructor( configuration ) {
+
+    // Instanciates the source device and enrich with technical infos
+    var source = new YamahaYXC(configuration.source);
+    source.getDeviceInfo().
+      then( result => {
+        source.deviceInfo = JSON.parse(result);
+        log.debug("Source : %s",source);
+      }
+    );
+    this.source = source;
+
+    // Instanciates the target devices
+    this.targets = [];
+    if ( Array.isArray(configuration.target) ) {
+      for ( var t=0 ; t<configuration.target.length ; t++ ) {
+        this.targets.push( new YamahaYXC(configuration.target[t]) );
+      }
+    } else {
+      // We allow 'configuration.target' to be a string if only one value is given
+      this.targets.push( new YamahaYXC(configuration.target) );
+    }
+    log.debug("Targets : %s",this.targets);
+  }
+
+  /**
+    Puts off target devices when the source one goes off/standby.
+    Puts on target devices when the source one goes on.
+    E.g. event = { main: { power: "standby" }, device_id: 'AC44F2852577' }
+  */
+  onEvent( event ) {
+
+    // Filters out events
+    if ( !event.main || typeof event.main.power == 'undefined' ) {
+      return;
+    }
+    // It seems that a device may report for another, linked one => we filter out those events
+    if ( typeof event.device_id != undefined && event.device_id != this.source.deviceInfo.device_id ) {
+      return;
+    }
+
+    log.info("<<< Received power change event : %j", event);
+
+    for ( var t=0 ; t<this.targets.length ; t++ ) {
+      // Here we use YamahaYXC's API to implement our behaviour
+      log.info(">>> Sending power '%s' to %s", event.main.power, this.targets[t].ip );
+      // Possible values for 'power' are : 'on' or 'standby' (see https://github.com/foxthefox/yamaha-yxc-nodejs)
+      this.targets[t].power(event.main.power);
+    }
+  }
+
+}