jsonhxdef is a ruby script that helps you quickly define a typedef from some arbitary json

JsonHxDef.hx

typedef JsonObj = {
	glossary:Glossary,
}

typedef Glossary = {
	title:String,
	GlossDiv:GlossDiv,
}

typedef GlossDiv = {
	title:String,
	GlossList:GlossList,
}

typedef GlossList = {
	GlossEntry:GlossEntry,
}

typedef GlossEntry = {
	GlossTerm:String,
	GlossSee:String,
	Abbrev:String,
	Acronym:String,
	ID:String,
	GlossDef:GlossDef,
	SortAs:String,
}

typedef GlossDef = {
	para:String,
	GlossSeeAlso:Array<String>,
}

jsonhxdef.rb

#!/usr/bin/env ruby
# jsonhxdef: Turns some well-specified json into a haxe typedef
# Author: Justin Donaldson jdonaldson@gmail.com
#
# Usage: ./jsonhxdef.rb input.json
# (output is written to stdout)

require 'rubygems'
require 'json'

def hash_equal(h1,h2)
  return false if h1.length != h2.length
  h1.each{|key,value|
    return false if not h2.key?(key)
    return false if h1[key] != h2[key]
  }
  return true
end


file_name = ARGV[0]
raise "No file argument" if File.name.nil?
raise "File does not exist" if not File.exists?(file_name)
str = IO.read(file_name)
json = JSON.parse(str)
objs = {}
unique_objs = {}
objs['JsonHxDef'] = json
while(not objs.empty?)
  obkey = objs.keys[0]
  obj = objs[obkey]

  fobj = {}
  obj.each{|key,value|  
    type = ''
    arr_depth = 0
    if value.is_a? Array
      while value.is_a? Array
        value = value[0]
        arr_depth +=1
        type = key.split(/[^a-zA-Z]/).map{|x| x.capitalize}.join("")
		p type
      end
      if value.class == Hash
        objs[type] = value
		if arr_depth > 0
		  type = "Array" + ("<" * arr_depth) + type + (">" * arr_depth)
		end
        fobj[key] = type
        next
      end
    end

    if value.is_a? Float
    	type = "Float"
    elsif value.is_a? Integer
    	type = "Int"
    elsif value.is_a?(TrueClass) || value.is_a?(FalseClass)
    	type = "Bool"
    elsif value.is_a? String
    	type = "String" 
    elsif value.is_a? Hash
      type = key.split(/[^a-zA-Z]/).map{|x| x.capitalize}.join("")
      objs[type] = value
    end 

	if arr_depth > 0
	  type = "Array" + ("<" * arr_depth) + type + (">" * arr_depth)
	end

    fobj[key] = type
  }
  objs.delete(obkey)
  
  while(unique_objs.key?(obkey))
    obkey +='X'
  end
  unique_objs[obkey]=true
    
  print "\ntypedef " + obkey + " = {\n"
  fobj.each{|key,value|
    print "\t" + key + ":" + value + ",\n"
  }
  print "}\n"
  
end

test.json

{
    "glossary": {
        "title": "example glossary",
		"GlossDiv": {
            "title": "S",
			"GlossList": {
                "GlossEntry": {
                    "ID": "SGML",
					"SortAs": "SGML",
					"GlossTerm": "Standard Generalized Markup Language",
					"Acronym": "SGML",
					"Abbrev": "ISO 8879:1986",
					"GlossDef": {
                        "para": "A meta-markup language, used to create markup languages such as DocBook.",
						"GlossSeeAlso": ["GML", "XML"]
                    },
					"GlossSee": "markup"
                }
            }
        }
    }
}