Module: RailsAttrEnum::Enum::ClassMethods

Defined in:
lib/rails_attr_enum/enum.rb

Instance Method Summary collapse

Instance Method Details

#add(entry) ⇒ Object 



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# File 'lib/rails_attr_enum/enum.rb', line 19

def add(entry)
  const_name = entry[:key].to_s.upcase
  const_set(const_name, entry[:value])
  const_set("#{const_name}_LABEL", entry[:label])
  @entries << entry
end

#attr_name ⇒ Object 



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# File 'lib/rails_attr_enum/enum.rb', line 45

def attr_name; @attr_name end

#get_key(value) ⇒ Object 



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# File 'lib/rails_attr_enum/enum.rb', line 41

def get_key(value)
  get_from_entries(:key, value)
end

#get_label(value) ⇒ Object 



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# File 'lib/rails_attr_enum/enum.rb', line 37

def get_label(value)
  get_from_entries(:label, value)
end

#init_enum(attr_name) ⇒ Object 



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# File 'lib/rails_attr_enum/enum.rb', line 12

def init_enum(attr_name)
  return if @init
  @attr_name = attr_name
  @entries = []
  @init = true
end

#keys ⇒ Object 



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# File 'lib/rails_attr_enum/enum.rb', line 46

def keys;   mapped(:key) end

#label_value_pairs(*keys) ⇒ Object 



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# File 'lib/rails_attr_enum/enum.rb', line 26

def label_value_pairs(*keys)
  if keys.empty?
    labels.zip(values)
  else
    @entries.reduce([]) do |arr, entry|
      arr << [entry.label, entry.value] if keys.include?(entry.key)
      arr
    end
  end
end

#labels ⇒ Object 



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# File 'lib/rails_attr_enum/enum.rb', line 48

def labels; mapped(:label) end

#to_h(options = {}) ⇒ Object 



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# File 'lib/rails_attr_enum/enum.rb', line 50

def to_h(options = {})
  default_to_include = [:key, :value, :label]

  [:only, :except].each do |key|
    if options.include?(key)
      if options[key].is_a?(Symbol)
        options[key] = [options[key]]
      elsif options[key].empty?
        options[key] = nil
      end

      unless options[key].nil? || (options[key] - default_to_include).empty?
        raise 'Unknown keys for enum'
      end
    end
  end

  to_include =
    if !options[:only].nil?
      default_to_include & options[:only]
    elsif !options[:except].nil?
      default_to_include - options[:except]
    else
      default_to_include
    end

  builder =
    if to_include.size == 1
      to_include = to_include.first
      proc { |entry| [entry.const_name, entry.send(to_include)]}
    else
      proc do |entry|
        value = Hash[entry.to_h.select { |(key, _)| to_include.include?(key) }]
        [entry.const_name, value]
      end
    end

  Hash[@entries.map(&builder)]
end

#to_json(options = {}) ⇒ Object 



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# File 'lib/rails_attr_enum/enum.rb', line 90

def to_json(options = {})
  to_h(options).to_json
end

#values ⇒ Object 



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# File 'lib/rails_attr_enum/enum.rb', line 47

def values; mapped(:value) end