Hash from dot-notation keys

hashify_from_dot_notation.rb

def hash_from_dot_notation(value)
  return value unless value.is_a?(Hash)

  value.deep_stringify_keys.each_with_object({}) do |(k,v), result|
    root, child = k.split('.')

    if child
      result[root] ||= {}
      result[root][child] = hash_from_dot_notation(v)
    else
      result[root] = hash_from_dot_notation(v)
    end
  end
end

# Used to convert a hash with keys that are dot-notation into nested values
# Eg:
# params = {
#   "legalType"=>"PRIVATE",
#   "abartn"=>"111000025",
#   "accountNumber"=>"1234567",
#   "accountType"=>"CHECKING",
#   "address.city"=> {
#     'param.name'=>'Durban',
#     'param.code'=>'DBN'
#   },
#   "details"=> {
#     "account_details_type"=>"aba",
#     "address.country"=>"EH",
#     "address.city"=>"London",
#     "address.postCode"=>"10025",
#     "address.firstLine"=>"50 Branson Ave"
#   }
# }

# hash_from_dot_notation(params)

# {
#   "legalType"=>"PRIVATE",
#   "abartn"=>"111000025",
#   "accountNumber"=>"1234567",
#   "accountType"=>"CHECKING",
#   "address"=>{
#     "city"=>{
#       "param"=>{"name"=>"Durban", "code"=>"DBN"}
#     }
#   },
#   "details"=>
#   {
#     "account_details_type"=>"aba",
#     "address"=>
#     {
#       "country"=>"EH",
#       "city"=>"London",
#       "postCode"=>"10025",
#       "firstLine"=>"50 Branson Ave"
#     }
#   }
# }