Added a new feature to allow a color range

README.md

@@ -80,6 +80,12 @@ Gist Parameter | Description
 `logoPosition` | The position of the logo.
 `style` | The style like "flat" or "social".
 `cacheSeconds` | The cache lifetime in seconds (must be greater than 300).
+`valColorRange` | Numerical value used to define the message color.
+`maxColorRange` | Maximum value in the range used to define the message color.
+`minColorRange` | Minimum value in the range used to define the message color.
+`invertColorRange` | If the range should be inverted, causing a smaller value to have green color.
+`colorRangeSaturation` |  Saturation used by the color range feature. Defaults to 100%.
+`colorRangeLightness` |  Lightness used by the color range feature. Defaults to 40%.
 
 ### Using Environment Variables as Parameters [![badge](https://img.shields.io/endpoint?url=https://gist.githubusercontent.com/schneegans/2ab8f1d386f13aaebccbd87dac94068d/raw/answer.json)](https://img.shields.io/endpoint?url=https://gist.githubusercontent.com/schneegans/2ab8f1d386f13aaebccbd87dac94068d/raw/answer.json)
 

action.yml

@@ -49,6 +49,24 @@ inputs:
   cacheSeconds:
     description: 'The cache lifetime in seconds (must be greater than 300)'
     required: false
+  valColorRange:
+    description: 'Numerical value used to define the message color.'
+    required: false
+  maxColorRange:
+    description: 'Maximum value in the range used to define the message color.'
+    required: false
+  minColorRange:
+    description: 'Minimum value in the range used to define the message color.'
+    required: false
+  invertColorRange:
+    description: 'If the range should be inverted, causing a smaller value to have green color.'
+    required: false
+  colorRangeSaturation:
+    description: 'Saturation used by the color range feature. Defaults to 100%.'
+    required: false
+  colorRangeLightness:
+    description: 'Lightness used by the color range feature. Defaults to 40%.
+    required: false
 runs:
   using: 'node12'
   main: 'index.js'

index.js

@@ -24,12 +24,39 @@ try {
   const logoPosition = core.getInput('logoPosition');
   const style        = core.getInput('style');
   const cacheSeconds = core.getInput('cacheSeconds');
+  const valColorRange = core.getInput('valColorRange');
+  const minColorRange = core.getInput('minColorRange');
+  const maxColorRange = core.getInput('maxColorRange');
+  const invertColorRange = core.getInput('invertColorRange');
+  const colorRangeSaturation = core.getInput('colorRangeSaturation');
+  const colorRangeLightness = core.getInput('colorRangeLightness');
 
   if (labelColor != '') {
     content.labelColor = labelColor;
   }
 
-  if (color != '') {
+  if (minColorRange != '' && maxColorRange != '' && valColorRange != '') {
+    const max = parseFloat(maxColorRange);
+    const min = parseFloat(minColorRange);
+    const val = parseFloat(valColorRange);
+    if (val < min) val = min;
+    if (val > max) val = max;
+    let hue = 0;
+    if (invertColorRange == '') {
+      hue = Math.floor((val - min) / (max - min) * 120);
+    } else {
+      hue = Math.floor((max - val) / (max - min) * 120);
+    }
+    let sat = 100;
+    if(colorRangeSaturation != '') {
+      sat = colorRangeSaturation;
+    } 
+    let lig = 40;
+    if(colorRangeLightness != '') {
+      lig = colorRangeLightness;
+    }
+    content.color = "hsl(" + hue + ", " + sat +  "%, " + lig + "%)";
+  } else if (color != '') {
     content.color = color;
   }