Module: JSON

Defined in:
lib/neatjson.rb

Class Method Summary collapse

Class Method Details

.neat_generate(object, opts = {}) ⇒ String

Returns the JSON representation of the object.

Returns:

  • (String) —

    the JSON representation of the object.



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# File 'lib/neatjson.rb', line 25

def self.neat_generate(object,opts={})
  opts[:wrap] = 80 unless opts.key?(:wrap)
  opts[:wrap] = -1 if opts[:wrap]==true
  opts[:indent]         ||= "  "
  opts[:array_padding]  ||= opts[:padding]      || 0
  opts[:object_padding] ||= opts[:padding]      || 0
  opts[:after_comma]    ||= opts[:around_comma] || 0
  opts[:before_comma]   ||= opts[:around_comma] || 0
  opts[:before_colon]   ||= opts[:around_colon] || 0
  opts[:after_colon]    ||= opts[:around_colon] || 0
  raise ":indent option must only be whitespace" if opts[:indent]=~/\S/

  apad  = " " * opts[:array_padding]
  opad  = " " * opts[:object_padding]
  comma = "#{' '*opts[:before_comma]},#{' '*opts[:after_comma]}"
  colon = "#{' '*opts[:before_colon]}:#{' '*opts[:after_colon]}"

  build = ->(o,indent) do
    case o
      when String               then "#{indent}#{o.inspect}"
      when Symbol               then "#{indent}#{o.to_s.inspect}"
      when TrueClass,FalseClass then "#{indent}#{o}"
      when NilClass             then "#{indent}null"
      when Numeric
        if opts[:decimals]
          "#{indent}%.#{opts[:decimals]}f" % o
        else
          "#{indent}#{o}"
        end

      when Array
        pieces = o.map{ |v| build[v,''] }
        one_line = "#{indent}[#{apad}#{pieces.join comma}#{apad}]"
        if !opts[:wrap] || (one_line.length <= opts[:wrap])
          one_line
        elsif opts[:short]
          pieces = o.map{ |v| build[ v,"#{indent} #{apad}" ] }
          pieces[0].sub! /^#{indent} #{apad}/, "#{indent}[#{apad}"
          pieces.last << apad << "]"
          pieces.join ",\n"
        else
          indent2 = "#{indent}#{opts[:indent]}"
          "#{indent}[\n#{o.map{ |x| build[ x, indent2 ] }.join ",\n"}\n#{indent}]"
        end

      when Hash
        keyvals = o.map{ |k,v| [ k.to_s.inspect, build[v,''] ] }
        keyvals = keyvals.sort_by(&:first) if opts[:sorted]
        keyvals = keyvals.map{ |a,b| [a,b].join(colon) }.join(comma)
        one_line = "#{indent}{#{opad}#{keyvals}#{opad}}"
        if !opts[:wrap] || (one_line.length <= opts[:wrap])
          one_line
        else
          if opts[:short]
            keyvals = o.map{ |k,v| ["#{indent} #{opad}#{k.to_s.inspect}",v] }
            keyvals = keyvals.sort_by(&:first) if opts[:sorted]
            keyvals[0][0].sub! "#{indent} ", "#{indent}{"
            if opts[:aligned]
              longest = keyvals.map(&:first).map(&:length).max
              keyvals.each{ |k,v| k.replace( "%-#{longest}s" % k ) }
            end
            keyvals.map! do |k,v|
              indent2 = " "*"#{k}#{colon}".length
              one_line = "#{k}#{colon}#{build[v,'']}"
              if opts[:wrap] && (one_line.length > opts[:wrap]) && (v.is_a?(Array) || v.is_a?(Hash))
                "#{k}#{colon}#{build[v,indent2].lstrip}"
              else
                one_line
              end
            end
            keyvals.last << opad << "}"
            keyvals.join ",\n"
          else
            keyvals = o.map{ |k,v| ["#{indent}#{opts[:indent]}#{k.to_s.inspect}",v] }
            keyvals = keyvals.sort_by(&:first) if opts[:sorted]
            if opts[:aligned]
              longest = keyvals.map(&:first).map(&:length).max
              keyvals.each{ |k,v| k.replace( "%-#{longest}s" % k ) }
            end
            indent2 = "#{indent}#{opts[:indent]}"
            keyvals.map! do |k,v|
              one_line = "#{k}#{colon}#{build[v,'']}"
              if opts[:wrap] && (one_line.length > opts[:wrap]) && (v.is_a?(Array) || v.is_a?(Hash))
                "#{k}#{colon}#{build[v,indent2].lstrip}"
              else
                one_line
              end
            end
            "#{indent}{\n#{keyvals.join(",\n")}\n#{indent}}"
          end
        end

      else
        "#{indent}#{o.to_json(opts)}"
    end
  end

  build[object,'']
end