From 753fe3b037663dc38f51986ee5985d46c4f70b8f Mon Sep 17 00:00:00 2001
From: Jean-Laurent Girod <jeanlaurent.girod@icloud.com>
Date: Sat, 26 Aug 2023 01:03:25 +0200
Subject: [PATCH 1/2] Create propState.js

Calculate propulsion.*.state based on propulsion.*.revolutions
---
 calcs/propState.js | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 calcs/propState.js

diff --git a/calcs/propState.js b/calcs/propState.js
new file mode 100644
index 0000000..7467f79
--- /dev/null
+++ b/calcs/propState.js
@@ -0,0 +1,37 @@
+const _ = require('lodash')
+
+module.exports = function (app, plugin) {
+  var engines = plugin.engines
+
+  app.debug('engines: %j', engines)
+
+  return engines.map(instance => {
+    return {
+      group: 'propulsion',
+      optionKey: instance + 'state',
+      title: `${instance} propulsion state (based on revolutions)`,
+      derivedFrom: function () {
+        return [
+          'propulsion.' + instance + '.revolutions'
+        ]
+      },
+      calculator: function (revol) {
+        if (revol > 0) {
+          return [
+            {
+              path: 'propulsion.' + instance + '.state',
+              value: "started"
+            }
+          ]
+        } else {
+          return [
+            {
+              path: 'propulsion.' + instance + '.state',
+              value: "stopped"
+            }
+          ]
+        }
+      }
+    }
+  })
+}

From a7ed1a359e25951c763dd41eb505ac8fb2262ef3 Mon Sep 17 00:00:00 2001
From: Jean-Laurent Girod <jeanlaurent.girod@icloud.com>
Date: Wed, 15 May 2024 17:47:10 +0200
Subject: [PATCH 2/2] Update propState.js

Update value only when state changes
---
 calcs/propState.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/calcs/propState.js b/calcs/propState.js
index 7467f79..5077688 100644
--- a/calcs/propState.js
+++ b/calcs/propState.js
@@ -16,14 +16,17 @@ module.exports = function (app, plugin) {
         ]
       },
       calculator: function (revol) {
-        if (revol > 0) {
+        const currentState =
+          app.getSelfPath('propulsion.' + instance + '.state.value') || 'none'
+
+        if ((revol > 0) && (currentState !== "started")) {
           return [
             {
               path: 'propulsion.' + instance + '.state',
               value: "started"
             }
           ]
-        } else {
+        } else if ((revol == 0) && (currentState !== "stopped")) {
           return [
             {
               path: 'propulsion.' + instance + '.state',