ruby sketchup scene serialization - json

Question

I am very new on Sketchup and ruby , I have worked with java and c# but this is the first time with ruby.
Now I have one problem, I need to serialize all scene in one json (scene hierarchy, object name, object material and position this for single object) how can I do this?
I have already done this for unity3D (c#) without a problem.
I tried this:
def main
avr_entities = Sketchup.active_model.entities # all objects
ambiens_dictionary = {}
ambiens_list = []
avr_entities.each do |root|
if root.is_a?(Sketchup::Group) || root.is_a?(Sketchup::ComponentInstance)
if root.name == ""
UI.messagebox("this is a group #{root.definition.name}")
if root.entities.count > 0
root.entities.each do |leaf|
if leaf.is_a?(Sketchup::Group) || leaf.is_a?(Sketchup::ComponentInstance)
UI.messagebox("this is a leaf #{leaf.definition.name}")
end
end
end
else
# UI.messagebox("this is a leaf #{root.name}")
end
end
end
end

Answer 1

Have you tried the JSON library
require 'json'
source = { a: [ { b: "hello" }, 1, "world" ], c: 'hi' }.to_json
source.to_json # => "{\"a\":[{\"b\":\"hello\"},1,\"world\"],\"c\":\"hi\"}"

Answer 2

Used the code below to answer a question Here, but it might also work here.
The code can run outside of SketchUp for testing in the terminal. Just make sure to follow these steps...
Copy the code below and paste it on a ruby file (example: file.rb)
Run the script in terminal ruby file.rb.
The script will write data to JSON file and also read the content of JSON file.
The path to the JSON file is relative to the ruby file created in step one. If the script can't find the path it will create the JSON file for you.
module DeveloperName
module PluginName
require 'json'
require 'fileutils'
class Main
def initialize
path = File.dirname(__FILE__)
#json = File.join(path, 'file.json')
#content = { 'hello' => 'hello world' }.to_json
json_create(#content)
json_read(#json)
end
def json_create(content)
File.open(#json, 'w') { |f| f.write(content) }
end
def json_read(json)
if File.exist?(json)
file = File.read(json)
data_hash = JSON.parse(file)
puts "Json content: #{data_hash}"
else
msg = 'JSON file not found'
UI.messagebox(msg, MB_OK)
end
end
# # #
end
DeveloperName::PluginName::Main.new
end
end