Module: StatusManager::ClassMethods

Defined in:
lib/status-manager.rb

Overview

Class Methods

Instance Method Summary collapse

Instance Method Details

#attr_as_status(status_attribute, status_sets, options = {}) ⇒ Object

assign attributes as status



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# File 'lib/status-manager.rb', line 19

def attr_as_status(status_attribute, status_sets, options = {})
  register_status_sets(status_attribute, status_sets)
  status_group(status_attribute, options[:group]) if options.key?(:group)
  set_default_status(status_attribute, options[:default]) if options.key?(:default)
end

#register_status_sets(status_attribute, status_sets) ⇒ Object 



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# File 'lib/status-manager.rb', line 25

def register_status_sets(status_attribute, status_sets)
  # if status_sets parameter is array.
  # ex) register_status_sets(status, [:onsale, :soldout, :reject])
  fail 'Not defined statuses' if status_sets.empty?

  if status_sets.instance_of?(Array)
    status_hash = {}
    status_sets.each do |status_set|
      status_hash[status_set] = status_set.to_s
    end
    status_sets = status_hash
  end

  status_store = StatusStore.new(status_attribute, status_sets)
  status_store_list.add(status_store)

  scope("#{status_store.attribute_name}",
        -> (statuses) { where("#{table_name}.#{status_store.attribute_name}" => status_store.values(statuses)) })

  status_store.status_sets.each do |key, value|
    # active_record scope setting
    scope("#{status_store.attribute_name}_#{key}",
          -> { where("#{table_name}.#{status_store.attribute_name}" => value) })

    # status check method
    define_method "#{status_store.attribute_name}_#{key}?" do
      send("#{status_store.attribute_name}") == value
    end

    define_method "#{status_store.attribute_name}_was_#{key}?" do
      send("#{status_store.attribute_name}_was") == value
    end

    # update status
    define_method "update_#{status_store.attribute_name}_to_#{key}" do
      update_attributes("#{status_store.attribute_name}" => "#{value}")
    end

    define_method "#{status_store.attribute_name}_to_#{key}" do
      send("#{status_store.attribute_name}=", value)
    end
  end

  # status check method
  define_method "#{status_store.attribute_name}?" do |status|
    send("#{status_store.attribute_name}_#{status}?")
  end

  define_method "#{status_store.attribute_name}_was?" do |status|
    send("#{status_store.attribute_name}_was_#{status}?")
  end

  # status setter (do not override attr_accessible)
  define_method "#{status_store.attribute_name}_to" do |status|
    fail "#{status} is undefined status or it is group status" unless status_store.status?(status)
    status_value = self.class.status_store_list.get(status_store.attribute_name).value(status)
    send("#{status_store.attribute_name}=", status_value)
  end

  # update status
  define_method "update_#{status_store.attribute_name}_to" do |status|
    fail "#{status} is undefined status or it is group status" unless status_store.status?(status)
    update_attributes(status_attribute.to_sym => self.class.status_store_list.get(status_store.attribute_name).value(status))
  end

  define_method("#{status_store.attribute_name}_changed?") do |options = {}|
    statuses = send("#{status_store.attribute_name}_change")
    if statuses
      if statuses[0] == statuses[1]
        return false
      elsif options[:from] && options[:to]
        send("#{status_store.attribute_name}_was?", options[:from]) && send("#{status_store.attribute_name}?", options[:to])
      elsif options[:to]
        send("#{status_store.attribute_name}?", options[:to])
      elsif options[:from]
        send("#{status_store.attribute_name}_was?", options[:from])
      else
        return true
      end
    else
      return false
    end
  end

  # get status list
  define_singleton_method "#{status_store.attribute_name.to_s.pluralize}" do
    status_store_list.get(status_store.attribute_name).status_sets
  end
end

#set_default_status(status_attribute, status) ⇒ Object 



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# File 'lib/status-manager.rb', line 115

def set_default_status(status_attribute, status)
  before_create do |obj|
    obj.send("#{status_attribute}=", obj.class.send(status_attribute.to_s.pluralize)[status]) unless obj.send(status_attribute.to_s)
  end
end

#status_store_list ⇒ Object 



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# File 'lib/status-manager.rb', line 121

def status_store_list
  if self.class_variable_defined?(:@@status_store_list)
    class_variable_get(:@@status_store_list)
  else
    class_variable_set(:@@status_store_list, StatusStoreList.new)
  end
end