Class: StatefulEnum::Machine

Inherits:
Object
  • Object
show all
Defined in:
lib/stateful_enum/machine.rb

Defined Under Namespace

Classes: Event

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model, column, states, prefix, suffix, &block) ⇒ Machine 



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# File 'lib/stateful_enum/machine.rb', line 7

def initialize(model, column, states, prefix, suffix, &block)
  @model, @column, @states, @events = model, column, states, []
  @prefix = if prefix
    prefix == true ? "#{column}_" : "#{prefix}_"
  end
  @suffix = if suffix
    suffix == true ? "_#{column}" : "_#{suffix}"
  end

  # undef non-verb methods e.g. Model#active!
  states.each do |state|
    @model.send :undef_method, "#{@prefix}#{state}#{@suffix}!"
  end

  instance_eval(&block) if block
end

Instance Attribute Details

#events ⇒ Object (readonly)

Returns the value of attribute events.



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# File 'lib/stateful_enum/machine.rb', line 5

def events
  @events
end

Instance Method Details

#event(name, &block) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/stateful_enum/machine.rb', line 24

def event(name, &block)
  raise ArgumentError, "event: :#{name} has already been defined." if @events.map(&:name).include? name
  @events << Event.new(@model, @column, @states, @prefix, @suffix, name, &block)
end