Recursively compare json objects

compare.rb

require 'json'

def flatten_hash(param, prefix=nil)
  param.each_pair.reduce({}) do |a, (k, v)|
    if v.is_a?(Array)
      v = v.map.with_index { |x, i| [i, x] }.to_h
    end

    if v.is_a?(Hash)
      a.merge(flatten_hash(v, "#{prefix}#{k}."))
    else
      a.merge("#{prefix}#{k}".to_sym => v)
    end
  end
end

def print_csv(diff)
  diff.map do |x|
    x.join(",")
  end.join("\n")
end

vortex = JSON.parse(File.read('vortex.json'))
search = JSON.parse(File.read('search.json'))

vortex_flatten = flatten_hash(vortex)
search_flatten = flatten_hash(search).invert

diff = vortex_flatten.map do |key, value|
  if !search_flatten.key?(value)
    [key, value]
  end
end.compact

File.write('diff.csv', print_csv(diff))
File.write('diff_uniq.csv', print_csv(diff.uniq(&:last)))