Class: ParamsReady::Helpers::KeyMap

Inherits:
Object
  • Object
show all
Defined in:
lib/params_ready/helpers/key_map.rb

Defined Under Namespace

Classes: Mapping

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ KeyMap

Returns a new instance of KeyMap.



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# File 'lib/params_ready/helpers/key_map.rb', line 127

def initialize
  @mappings = []
end

Class Method Details

.split_map(array) ⇒ Object

Raises:



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# File 'lib/params_ready/helpers/key_map.rb', line 167

def self.split_map(array)
  raise ParamsReadyError, "Array expected, got: #{array.class.name}" unless array.is_a? Array
  names = array.last || []
  raise ParamsReadyError, "Array expected, got: #{names.class.name}" unless names.is_a? Array
  paths = array[0...-1]
  [paths, names]
end

Instance Method Details

#freeze ⇒ Object 



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# File 'lib/params_ready/helpers/key_map.rb', line 162

def freeze
  @mappings.each(&:freeze)
  super
end

#map(from, to:) ⇒ Object 



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# File 'lib/params_ready/helpers/key_map.rb', line 131

def map(from, to:)
  alt_path, alt_names = self.class.split_map(from)
  std_path, std_names = self.class.split_map(to)
  mapping = Mapping.new(alt_path, alt_names, std_path, std_names)
  merge_or_add_mapping(mapping)
  self
end

#merge_or_add_mapping(mapping) ⇒ Object 



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# File 'lib/params_ready/helpers/key_map.rb', line 139

def merge_or_add_mapping(mapping)
  if (existing = @mappings.find { |candidate| candidate =~ mapping })
    existing.merge!(mapping)
  else
    @mappings << mapping
  end
  mapping
end

#remap(from, to, input) ⇒ Object 



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# File 'lib/params_ready/helpers/key_map.rb', line 156

def remap(from, to, input)
  @mappings.each_with_object({}) do |mapping, result|
    mapping.remap(from, to, input, result)
  end
end

#to_alternative(hash) ⇒ Object 



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# File 'lib/params_ready/helpers/key_map.rb', line 152

def to_alternative(hash)
  remap(:std, :alt, hash)
end

#to_standard(hash) ⇒ Object 



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# File 'lib/params_ready/helpers/key_map.rb', line 148

def to_standard(hash)
  remap(:alt, :std, hash)
end