Class: Stockboy::FilterChain

Inherits:

Hash

• Object
• Hash
• Stockboy::FilterChain

Defined in:

lib/stockboy/filter_chain.rb

Overview

A hash for executing items in order with callbacks

Class Method Summary

• .new(hash = nil) ⇒ Object

  Initialize a new FilterChain with a hash of filters.

Instance Method Summary

• #keys_to_arrays ⇒ Hash{Symbol=>Array}

  Filter keys point to empty arrays.

• #prepend(hash) ⇒ Object

  Add filters to the front of the chain.

• #reset ⇒ Hash{Symbol=>Array}

  Call the reset callback on all filters that respond to it.

Class Method Details

.new(hash = nil) ⇒ Object

Initialize a new FilterChain with a hash of filters

Parameters:

• hash (Hash{Symbol=>Filter}) (defaults to: nil)

# File 'lib/stockboy/filter_chain.rb', line 11

def self.new(hash=nil)
  super().replace(hash || {})
end

Instance Method Details

#keys_to_arrays ⇒ Hash{Symbol=>Array}

Returns Filter keys point to empty arrays.

Returns:

• (Hash{Symbol=>Array}) —

  Filter keys point to empty arrays

# File 'lib/stockboy/filter_chain.rb', line 36

def keys_to_arrays
  Hash[keys.map { |k| [k, []] }]
end

#prepend(hash) ⇒ Object

Add filters to the front of the chain

Parameters:

• hash (Hash{Symbol=>Filter}) —

  Filters to add

# File 'lib/stockboy/filter_chain.rb', line 19

def prepend(hash)
  replace hash.merge(self)
end

#reset ⇒ Hash{Symbol=>Array}

Call the reset callback on all filters that respond to it

Returns:

• (Hash{Symbol=>Array}) —

  Filter keys point to empty arrays

# File 'lib/stockboy/filter_chain.rb', line 27

def reset
  each do |key, filter|
    filter.reset if filter.respond_to? :reset
  end
  keys_to_arrays
end