Class: Jsont

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

Constant Summary collapse

VERSION = 
'0.1.0'

Instance Method Summary collapse

Constructor Details

#initialize(rules) ⇒ Jsont

Returns a new instance of Jsont.



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# File 'lib/jsont.rb', line 10

def initialize(rules)
  @rules = rules.is_a?(String) ? JSON.parse(rules) : rules.dup
  @rules.each do |r,v| 
    if r[0,4] != 'self'
      @rules["self.#{r}"] = @rules.delete(r)
    end
  end
end

Instance Method Details

#apply!(target_path, target) ⇒ Object 



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# File 'lib/jsont.rb', line 24

def apply!(target_path, target)
  case target
  when Array
    target.each_index do |i|
      target[i] = apply!("#{target_path}[*]", apply!("#{target_path}[#{i}]", target[i]))
    end
  when Hash
    target.each do |k, v|
      target[k] = apply!("#{target_path}.?", apply!("#{target_path}.#{k}", target[k]))
    end
  end
  
  if (rule = @rules[target_path])
    rule.gsub(/\{([a-z0-9\$\.]+)\}/) do |match|
      path = match[1,match.size - 2]
      n = case path[0]
      when ?$
        target
      else
        @parent
      end
      path.gsub!(/^\$\.?/,'')

      if path.size > 0
        path.split('.').each do |piece|
          n = case piece
          when /^[0-9]+$/
            n[Integer(piece)]
          else
            n[piece]
          end
        end
      end
      n
    end
  else
    target
  end
end

#transform(target) ⇒ Object 



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# File 'lib/jsont.rb', line 19

def transform(target)
  @parent = target.is_a?(String) ? JSON.parse(target) : target
  apply!('self',@parent)
end