Class: RShade::Filter::FilterComposition

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/rshade/filter/filter_composition.rb

Constant Summary collapse

AND_OP = 
:and
OR_OP = 
:or
UNARY_OP = 
:unary

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(value, left = nil, right = nil) ⇒ FilterComposition

Returns a new instance of FilterComposition.

Parameters:

  • left (#call, Enumerable) (defaults to: nil)
  • right (#call, Enumerable) (defaults to: nil) 


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# File 'lib/rshade/filter/filter_composition.rb', line 15

def initialize(value, left = nil, right = nil)
  @value = value
  @left = left
  @right = right
end

Instance Attribute Details

#left ⇒ Object (readonly)

Returns the value of attribute left.



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# File 'lib/rshade/filter/filter_composition.rb', line 10

def left
  @left
end

#parent ⇒ Object

Returns the value of attribute parent.



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# File 'lib/rshade/filter/filter_composition.rb', line 11

def parent
  @parent
end

#right ⇒ Object (readonly)

Returns the value of attribute right.



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# File 'lib/rshade/filter/filter_composition.rb', line 10

def right
  @right
end

#value ⇒ Object (readonly)

Returns the value of attribute value.



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# File 'lib/rshade/filter/filter_composition.rb', line 10

def value
  @value
end

Class Method Details

.build(arr) ⇒ Object 



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# File 'lib/rshade/filter/filter_composition.rb', line 56

def self.build(arr)
  ::RShade::Filter::FilterBuilder.build(arr)
end

Instance Method Details

#call(event) ⇒ Object

rubocop:disable Metrics/CyclomaticComplexity



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# File 'lib/rshade/filter/filter_composition.rb', line 22

def call(event)
  case value
  when UNARY_OP
    left&.call(event)
  when AND_OP
    left&.call(event) && right&.call(event)
  when OR_OP
    left&.call(event) || right&.call(event)
  else
    value.call(event)
  end
end

#each {|value| ... } ⇒ Object

rubocop:enable Metrics/CyclomaticComplexity

Yields:



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# File 'lib/rshade/filter/filter_composition.rb', line 36

def each(&block)
  yield value unless left && right
  left&.each(&block)
  right&.each(&block)
end

#filter(type, &block) ⇒ Object 



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# File 'lib/rshade/filter/filter_composition.rb', line 42

def filter(type, &block)
  filter = find do |f|
    f.is_a? type
  end
  filter&.config(&block)
end

#filter_results(event) ⇒ Object

for debug purposes, show each filter and result of evaluation



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# File 'lib/rshade/filter/filter_composition.rb', line 50

def filter_results(event)
  each_with_object([]) do |filter, arr|
    arr << [filter, filter.call(event)]
  end
end