class NotationConverter

Class with static methods responsible for converting hashes between snake and camel case notations

Public Class Methods

to_camel(input, type = :lower, to_symbol = false) click to toggle source

Converts passed input to camelCase notation (lower or upper based on passed type param)

@param input [Hash|Array] input in snake_notation @param type [Symbol] the format type, `:lower` or `:upper` (default ':lower') @param to_symbol [Boolean] default false (defines if returned keys will be symbols or strings) @return [Hash|Array] input converted into the camelCase notation

# File lib/notation_converter.rb, line 38
def self.to_camel(input, type = :lower, to_symbol = false)
  conversion_logic = lambda do |k|
    new_k = k.to_s.split('_').map.with_index{ |e, i| (i == 0 && type != :upper) ? e.downcase : e.capitalize }.join
    return_val new_k, to_symbol
  end
  convert_input input, &conversion_logic
end

to_lower_camel(input, to_symbol = false) click to toggle source

Converts passed input to (lower) camelCase notation

@param input [Hash|Array] input in snake_notation @param to_symbol [Boolean] default false (defines if returned keys will be symbols or strings) @return [Hash|Array] input converted into the (lower) camelCase notation

# File lib/notation_converter.rb, line 60
def self.to_lower_camel(input, to_symbol = false)
  to_camel input, :lower, to_symbol
end

to_snake(input, to_symbol = false) click to toggle source

Converts passed input to snake_notation

@param input [Hash|Array] input in camelCase notation @param to_symbol [Boolean] default false (defines if returned keys will be symbols or strings) @return [Hash|Array] input converted into the snake_notation

# File lib/notation_converter.rb, line 69
def self.to_snake(input, to_symbol = false)

  conversion_logic = lambda do |k|
    new_k = k.gsub(/(.)([A-Z])/,'\1_\2').downcase
    return_val new_k, to_symbol
  end
  convert_input input, &conversion_logic

end

to_upper_camel(input, to_symbol = false) click to toggle source

Converts passed input to (Upper) CamelCase notation

# File lib/notation_converter.rb, line 51
def self.to_upper_camel(input, to_symbol = false)
  to_camel input, :upper, to_symbol
end

Private Class Methods

convert_input(input, &conversion_logic) click to toggle source

# File lib/notation_converter.rb, line 4
def self.convert_input(input, &conversion_logic)

  unless input.nil?

    new_input = {}

    if input.kind_of? Hash
      input.each_pair do |k,v|
        new_k = conversion_logic.call(k)
        new_input[new_k] = (convert_input v, &conversion_logic)
      end
    elsif input.kind_of? Array
      new_input = input.map do |elem|
        convert_input elem, &conversion_logic
      end
    else
      new_input = input
    end

    new_input
  end

end

return_val(k, to_symbol) click to toggle source

# File lib/notation_converter.rb, line 28
def self.return_val (k, to_symbol)
  (to_symbol) ? k.to_sym : k
end