Class: Speckle::List::Builder

Inherits:
Object
  • Object
show all
Defined in:
lib/speckle/list/builder.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Builder 



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# File 'lib/speckle/list/builder.rb', line 4

def initialize
  @sources = []
  @filters = []
  @filtered = nil
end

Instance Method Details

#add_filter(filter) ⇒ Object 



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# File 'lib/speckle/list/builder.rb', line 14

def add_filter(filter)
  @filters << filter
end

#add_source(source) ⇒ Object 



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# File 'lib/speckle/list/builder.rb', line 10

def add_source(source)
  @sources << source
end

#build ⇒ Object 



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# File 'lib/speckle/list/builder.rb', line 37

def build
  rebuild if @filtered.nil?
  @filtered
end

#filter_list(list, filter) ⇒ Object 



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# File 'lib/speckle/list/builder.rb', line 18

def filter_list(list, filter)
  filtered = []
  list.each do |item|
    result = filter.run(item)
    filtered.concat(result)
  end

  filtered
end

#rebuild ⇒ Object 



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# File 'lib/speckle/list/builder.rb', line 28

def rebuild
  filtered = @sources
  @filters.each do |filter|
    filtered = filter_list(filtered, filter)
  end

  @filtered = filtered
end