Class: JSON

Inherits:
Object
  • Object
show all
Defined in:
lib/red_query/json.rb

Class Method Summary collapse

Class Method Details

.classify(js_native) ⇒ Object 



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# File 'lib/red_query/json.rb', line 9

def self.classify(js_native)
  type = String.new(`typeof #{js_native}`)
  if (type == 'object' && `!#{js_native}`)
    return "null"
  end
  if (type == 'object' && `Object.prototype.toString.apply(#{js_native}) === '[object Array]'`)
    return "array"
  end
  type
end

.classify_ruby(stuff) ⇒ Object

Stringify =============================================


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# File 'lib/red_query/json.rb', line 62

def self.classify_ruby(stuff)
  if (stuff.class)
    return stuff.class.inspect.split("::").last
  end
  "Boolean"
end

.generate(stuff) ⇒ Object 



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# File 'lib/red_query/json.rb', line 139

def self.generate(stuff)
  self.stringify(stuff)
end

.parse(text) ⇒ Object

Parsing =============================================


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# File 'lib/red_query/json.rb', line 3

def self.parse(text)
  raise "[JSON.parse] empty JSON-String" if text == ""
  json_native = `eval("("+#{text}.__value__+")");`
  JSON.translate(json_native)
end

.stringify(stuff) ⇒ Object 



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# File 'lib/red_query/json.rb', line 113

def self.stringify(stuff)
  type = JSON.classify_ruby(stuff)
  
  if (type == "Numeric" || type == "Boolean")
    return stuff.inspect
  end
  
  if (type == "String")
    return JSON.stringify_string(stuff)
  end
  
  if (type == "Symbol")
    return JSON.stringify_string(stuff.to_s)
  end
  
  if (type == "Array")
    return JSON.stringify_array(stuff)
  end
  
  if (type == "Hash")
    return JSON.stringify_hash(stuff)
  end
  
  "null"
end

.stringify_array(stuff) ⇒ Object 



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# File 'lib/red_query/json.rb', line 102

def self.stringify_array(stuff)
  stuff.map! { |elem| JSON.stringify(elem) }
  return '[' + stuff.join(',') + ']'
end

.stringify_hash(stuff) ⇒ Object 



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# File 'lib/red_query/json.rb', line 107

def self.stringify_hash(stuff)
  pairs = []
  stuff.each { |key, value| pairs.push(JSON.stringify(key) + ':' + JSON.stringify(value)) }
  return '{' + pairs.join(',') + '}'
end

.stringify_string(str) ⇒ Object 



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# File 'lib/red_query/json.rb', line 69

def self.stringify_string(str)
  `
  var cx = /[\\u0000\\u00ad\\u0600-\\u0604\\u070f\\u17b4\\u17b5\\u200c-\\u200f\\u2028-\\u202f\\u2060-\\u206f\\ufeff\\ufff0-\\uffff]/g,
          escapable = /[\\\\\\"\\x00-\\x1f\\x7f-\\x9f\\u00ad\\u0600-\\u0604\\u070f\\u17b4\\u17b5\\u200c-\\u200f\\u2028-\\u202f\\u2060-\\u206f\\ufeff\\ufff0-\\uffff]/g,
          gap,
          indent,
          meta = {    // table of character substitutions
              '\\b': '\\\\b',
              '\\t': '\\\\t',
              '\\n': '\\\\n',
              '\\f': '\\\\f',
              '\\r': '\\\\r',
              '"' : '\\\\"',
              '\\\\': '\\\\\\\\'
          },
          rep;

  
  function quote(string) {
    escapable.lastIndex = 0;
          return escapable.test(string) ?
              '"' + string.replace(escapable, function (a) {
                  var c = meta[a];
                  return typeof c === 'string' ? c :
                      '\\\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
              }) + '"' :
              '"' + string + '"';
      }
  
  `
  value = String.new(`quote(#{str}.__value__)`)
end

.translate(js_native) ⇒ Object 



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# File 'lib/red_query/json.rb', line 40

def self.translate(js_native)
  type = JSON.classify(js_native)
  if (type == 'string')
    return String.new(js_native)
  end
  
  if (type == 'number' || type == 'boolean')
    return js_native
  end
  
  if (type == 'array')
    return JSON.translate_array(js_native)
  end
  
  if (type == 'object')
    return JSON.translate_object(js_native)
  end
  
  return nil
end

.translate_array(js_native) ⇒ Object 



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# File 'lib/red_query/json.rb', line 20

def self.translate_array(js_native)
  js_natives = []
  `for (var i=0; i<#{js_native}.length; i++) { #{js_natives}.push(#{js_native}[i]); }`

  js_natives.collect { |x| JSON.translate(x) }
end

.translate_object(js_native) ⇒ Object 



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# File 'lib/red_query/json.rb', line 27

def self.translate_object(js_native)
  stuff = []
  `for(var member in #{js_native}){#{stuff}.push(new Array($q(member), #{js_native}[member]));}`

  obj = {}
  stuff.each { |x|
    key = x[0]
    value = x[1]
    obj[key] = JSON.translate(value)
  }
  return obj
end