Class: Dynamican::Skimmer

Inherits:
Object
  • Object
show all
Defined in:
lib/dynamican/skimmer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(subject, collection, item_name, skimming_instances) ⇒ Skimmer

Returns a new instance of Skimmer.



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# File 'lib/dynamican/skimmer.rb', line 5

def initialize(subject, collection, item_name, skimming_instances)
  @subject = subject
  @collection = collection
  @item_name = calculate_item_name
  @skimming_instances = skimming_instances
end

Instance Attribute Details

#collection ⇒ Object (readonly)

Returns the value of attribute collection.



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# File 'lib/dynamican/skimmer.rb', line 3

def collection
  @collection
end

#item_name ⇒ Object (readonly)

Returns the value of attribute item_name.



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# File 'lib/dynamican/skimmer.rb', line 3

def item_name
  @item_name
end

#skimming_instances ⇒ Object (readonly)

Returns the value of attribute skimming_instances.



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# File 'lib/dynamican/skimmer.rb', line 3

def skimming_instances
  @skimming_instances
end

#subject ⇒ Object (readonly)

Returns the value of attribute subject.



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# File 'lib/dynamican/skimmer.rb', line 3

def subject
  @subject
end

Instance Method Details

#skim ⇒ Object 



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# File 'lib/dynamican/skimmer.rb', line 12

def skim
  set_instance_variables
  
  filters_rules = subject.filters.for_item(item_name).map(&:rules).flatten.map(&:statement)
  
  return collection if filters_rules.empty?
  
  skimming_result = collection.select do |collection_item|
    instance_variable_set("@#{item_name.downcase}", collection_item)
  
    filters_rules.all? { |rule| eval rule }
  end
  
  skimming_result
end