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{object} = require 'utila'
module.exports = self =
sanitize: (val) ->
self._toChildren val
_toChildren: (val) ->
if object.isBareObject val
return self._objectToChildren val
else if Array.isArray val
return self._arrayToChildren val
else if val is null or typeof val is 'undefined'
return []
else if typeof val in ['string', 'number']
return [String val]
else
throw Error "not a valid child node: `#{val}"
_objectToChildren: (o) ->
a = []
for own key, val of o
cur = {}
cur[key] = self.sanitize val
a.push cur
a
_arrayToChildren: (a) ->
ret = []
for v in a
ret.push self._toNode v
ret
_toNode: (o) ->
if typeof o in ['string', 'number']
return String o
else if object.isBareObject o
keys = Object.keys(o)
if keys.length isnt 1
throw Error "a node must only have one key as tag name"
key = keys[0]
obj = {}
obj[key] = self._toChildren o[key]
return obj
else
throw Error "not a valid node: `#{o}`"