Class: Featureflow::EvaluateHelpers

Inherits:
Object
  • Object
show all
Defined in:
lib/featureflow/evaluate_helpers.rb

Class Method Summary collapse

Class Method Details

.calculate_hash(salt = '1', feature = 'feature', key = 'anonymous') ⇒ Object 



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# File 'lib/featureflow/evaluate_helpers.rb', line 28

def self.calculate_hash(salt = '1', feature = 'feature', key = 'anonymous')
  (Digest::SHA1.hexdigest [salt, feature, key].join(':'))[0..14];
end

.get_variant_split_key(variant_splits, variant_value) ⇒ Object 



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# File 'lib/featureflow/evaluate_helpers.rb', line 20

def self.get_variant_split_key(variant_splits, variant_value)
  percent = 0
  variant_splits.each do |variant_split|
    percent += variant_split['split']
    return variant_split['variantKey'] if percent >= variant_value
  end
end

.get_variant_value(hash) ⇒ Object 



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# File 'lib/featureflow/evaluate_helpers.rb', line 32

def self.get_variant_value(hash)
  Integer(hash, 16) % 100 + 1
end

.rule_matches(rule, user) ⇒ Object 



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# File 'lib/featureflow/evaluate_helpers.rb', line 6

def self.rule_matches(rule, user)
  if rule['defaultRule']
    true # the default rule will always match true
  else
    rule['audience']['conditions'].all? do |condition|
      user_attributes = user[:attributes][condition['target']]
      # convert to array to work with test
      Array(user_attributes).any? do |attribute|
        Conditions.test condition['operator'], attribute, condition['values']
      end
    end
  end
end