Class: ActiveMappers::KeyTransformer

Inherits:
Object
  • Object
show all
Defined in:
lib/active_mappers/key_transformer.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name) ⇒ KeyTransformer

Returns a new instance of KeyTransformer.



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# File 'lib/active_mappers/key_transformer.rb', line 27

def initialize(name)
  @name = name
end

Class Method Details

.apply_on(name) ⇒ Object 



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# File 'lib/active_mappers/key_transformer.rb', line 5

def self.apply_on(name)
  new(name)
    .remove_ignored_namespace
    .apply_root_key_transform
end

.base_namespace(class_from) ⇒ Object 



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# File 'lib/active_mappers/key_transformer.rb', line 52

def self.base_namespace(class_from)
  base_namespace = class_from.name.split('::')[0] rescue ""
  base_namespace = '' unless Setup.ignored_namespaces.include?(base_namespace.downcase.to_sym)

  base_namespace
end

.format_keys(hash) ⇒ Object 



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# File 'lib/active_mappers/key_transformer.rb', line 11

def self.format_keys(hash)
  Setup.camelcase_keys ? hash.to_lower_camel_case : hash
end

.resource_class_to_mapper(resource_class_name, class_from) ⇒ Object 



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# File 'lib/active_mappers/key_transformer.rb', line 19

def self.resource_class_to_mapper(resource_class_name, class_from)
  resource_class_name[0..1] = '' if resource_class_name.start_with?('::')
  
  "#{base_namespace(class_from)}::#{resource_class_name}Mapper".constantize
rescue NameError
  raise "undefined mapper: '#{base_namespace(class_from)}::#{resource_class_name}Mapper'"
end

.resource_to_mapper(resource, class_from) ⇒ Object 



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# File 'lib/active_mappers/key_transformer.rb', line 15

def self.resource_to_mapper(resource, class_from)
  "#{base_namespace(class_from)}::#{resource.class.name}Mapper".constantize
end

Instance Method Details

#apply_root_key_transform ⇒ Object 



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# File 'lib/active_mappers/key_transformer.rb', line 38

def apply_root_key_transform
  camel_transformer = proc do |key|
    key.gsub('Mapper', '').tableize.camelize(:lower).gsub('::', '/')
  end

  snake_transformer = proc do |key|
    key.gsub('Mapper', '').tableize
  end

  transformer = Setup.camelcase_keys ? camel_transformer : snake_transformer

  (Setup.root_keys_transformer || transformer).call(@name)
end

#remove_ignored_namespace ⇒ Object 



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# File 'lib/active_mappers/key_transformer.rb', line 31

def remove_ignored_namespace
  Setup.ignored_namespaces.each do |namespace|
    @name.gsub!("#{namespace.to_s.capitalize}::", '')
  end
  self
end