Get highlight working

src/libs/highlight.js

@@ -0,0 +1,36 @@
+import randomColor from 'randomcolor'
+import Color from 'color'
+
+import stylegen from 'mapbox-gl-inspect/lib/stylegen'
+import colors from 'mapbox-gl-inspect/lib/colors'
+
+export function colorHighlightedLayer(layer) {
+  if(!layer || layer.type === 'background' || layer.type === 'raster') return null
+
+  function changeLayer(l) {
+    if(layer.filter) {
+      l.filter = layer.filter
+    } else {
+      delete l['filter']
+    }
+    l.id = l.id + '_highlight'
+    return l
+  }
+
+  const color = colors.brightColor(layer.id, 1)
+  const layers = []
+
+  if(layer.type === "fill" || layer.type === 'fill-extrusion') {
+    return changeLayer(stylegen.polygonLayer(color, color, layer.source, layer['source-layer']))
+  }
+
+  if(layer.type === "symbol" || layer.type === 'circle') {
+    return changeLayer(stylegen.circleLayer(color, layer.source, layer['source-layer']))
+  }
+
+  if(layer.type === 'line') {
+    return changeLayer(stylegen.lineLayer(color, layer.source, layer['source-layer']))
+  }
+
+  return null
+}