Class: Pluggaloid::Collection

Inherits:
Object
  • Object
show all
Defined in:
lib/pluggaloid/collection.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(event, *args) ⇒ Collection

Returns a new instance of Collection.



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# File 'lib/pluggaloid/collection.rb', line 7

def initialize(event, *args)
  @event = event
  args[event.collect_index] = nil
  @args = args.freeze
  @spec = argument_hash(args)
  @values = [].freeze
end

Instance Attribute Details

#values ⇒ Object (readonly)

Returns the value of attribute values.



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# File 'lib/pluggaloid/collection.rb', line 5

def values
  @values
end

Instance Method Details

#add(*v) ⇒ Object Also known as: << 



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# File 'lib/pluggaloid/collection.rb', line 15

def add(*v)
  rewind do |primitive|
    primitive + v
  end
end

#argument_hash_same?(specs) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pluggaloid/collection.rb', line 45

def argument_hash_same?(specs)
  @spec == argument_hash(specs)
end

#delete(*v) ⇒ Object 



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# File 'lib/pluggaloid/collection.rb', line 22

def delete(*v)
  rewind do |primitive|
    primitive - v
  end
end

#rewind(&block) ⇒ Object 



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# File 'lib/pluggaloid/collection.rb', line 28

def rewind(&block)
  new_values = block.(@values.dup)
  added, deleted = new_values - @values, @values - new_values
  @values = new_values.freeze
  unless added.empty?
    args = @args.dup
    args[@event.collect_index] = added
    @event.collection_add_event.call(*args)
  end
  unless deleted.empty?
    args = @args.dup
    args[@event.collect_index] = deleted
    @event.collection_delete_event.call(*args)
  end
  self
end