✨ refactoring into separate modules, extending Canvas

scripts/cleanStyle.coffee

@@ -0,0 +1,46 @@
+###
+  termap - Terminal Map Viewer
+  by Michael Strassburger <codepoet@cpan.org>
+
+  just a tool to make development easier
+
+  Input: Mapbox Studio map style file
+  Output: Reduced map style file (only supported attributes are kept)
+###
+fs = require 'fs'
+
+cleanStyle = (file) ->
+  json = JSON.parse fs.readFileSync(file).toString()
+
+  cleanedStyle =
+    name: json.name
+    layers: []
+
+  for layer in json.layers
+    continue if layer.ref
+
+    cleanLayer =
+      type: layer.type
+      id: layer.id
+      paint: {}
+      'source-layer': layer['source-layer']
+
+
+    for key in ['filter', 'minzoom']
+      cleanLayer[key] = layer[key] if layer[key]
+
+    if layer.layout?['text-size']
+      cleanLayer.layout = 'text-size': layer.layout?['text-size']
+
+    for key in ['fill-color', 'line-color', 'text-color', 'background-color']
+      cleanLayer.paint[key] = layer.paint[key] if layer.paint?[key]
+
+    if Object.keys(cleanLayer.paint).length
+      cleanedStyle.layers.push cleanLayer
+
+  JSON.stringify cleanedStyle, null, '  '
+
+console.log unless process.argv[2]
+  "usage: coffee cleanStyle.coffee <inputJSON>"
+else
+  cleanStyle process.argv[2]