codecombat/app/lib/utils.coffee

module.exports.clone = (obj) ->
  return obj if obj is null or typeof (obj) isnt "object"
  temp = obj.constructor()
  for key of obj
    temp[key] = module.exports.clone(obj[key])
  temp

module.exports.combineAncestralObject = (obj, propertyName) ->
  combined = {}
  while obj?[propertyName]
    for key, value of obj[propertyName]
      continue if combined[key]
      combined[key] = value
    if obj.__proto__
      obj = obj.__proto__
    else
      # IE has no __proto__. TODO: does this even work? At most it doesn't crash.
      obj = Object.getPrototypeOf(obj)
  combined

module.exports.normalizeFunc = (func_thing, object) ->
  # func could be a string to a function in this class
  # or a function in its own right
  object ?= {}
  if _.isString(func_thing)
    func = object[func_thing]
    if not func
      console.error("Could not find method", func_thing, 'in object', @)
      return => null # always return a func, or Mediator will go boom
    func_thing = func
  return func_thing 
  
module.exports.hexToHSL = (hex) ->
  rgbToHsl(hexToR(hex), hexToG(hex), hexToB(hex))

hexToR = (h) -> parseInt (cutHex(h)).substring(0, 2), 16
hexToG = (h) -> parseInt (cutHex(h)).substring(2, 4), 16
hexToB = (h) -> parseInt (cutHex(h)).substring(4, 6), 16
cutHex = (h) -> (if (h.charAt(0) is "#") then h.substring(1, 7) else h)
  
module.exports.hslToHex = (hsl) ->
  '#' + (toHex(n) for n in hslToRgb(hsl...)).join('')
  
toHex = (n) ->
  h = Math.floor(n).toString(16)
  h = '0'+h if h.length is 1
  h