Class: Prefab::CriteriaEvaluator

Inherits:
Object
  • Object
show all
Defined in:
lib/prefab/criteria_evaluator.rb

Constant Summary collapse

LOOKUP_KEY = 
'LOOKUP'
NAMESPACE_KEY = 
'NAMESPACE'
NO_MATCHING_ROWS = 
[].freeze

Instance Method Summary collapse

Constructor Details

#initialize(config, project_env_id:, resolver:, base_client:) ⇒ CriteriaEvaluator

Returns a new instance of CriteriaEvaluator.



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# File 'lib/prefab/criteria_evaluator.rb', line 9

def initialize(config, project_env_id:, resolver:, base_client:)
  @config = config
  @project_env_id = project_env_id
  @resolver = resolver
  @base_client = base_client
end

Instance Method Details

#all_criteria_match?(conditional_value, props) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/prefab/criteria_evaluator.rb', line 31

def all_criteria_match?(conditional_value, props)
  conditional_value.criteria.all? do |criterion|
    evaluate_criteron(criterion, props)
  end
end

#evaluate(properties) ⇒ Object 



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# File 'lib/prefab/criteria_evaluator.rb', line 16

def evaluate(properties)
  # TODO: optimize this and perhaps do it elsewhere
  props = properties.transform_keys(&:to_s)

  matching_environment_row_values.each do |conditional_value|
    return conditional_value.value if all_criteria_match?(conditional_value, props)
  end

  default_row_values.each do |conditional_value|
    return conditional_value.value if all_criteria_match?(conditional_value, props)
  end

  nil
end

#evaluate_criteron(criterion, properties) ⇒ Object 



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# File 'lib/prefab/criteria_evaluator.rb', line 37

def evaluate_criteron(criterion, properties)
  value_from_properties = properties[criterion.property_name]

  case criterion.operator
  when :LOOKUP_KEY_IN, :PROP_IS_ONE_OF
    matches?(criterion, value_from_properties, properties)
  when :LOOKUP_KEY_NOT_IN, :PROP_IS_NOT_ONE_OF
    !matches?(criterion, value_from_properties, properties)
  when :IN_SEG
    in_segment?(criterion, properties)
  when :NOT_IN_SEG
    !in_segment?(criterion, properties)
  when :PROP_ENDS_WITH_ONE_OF
    return false unless value_from_properties

    criterion.value_to_match.string_list.values.any? do |ending|
      value_from_properties.end_with?(ending)
    end
  when :PROP_DOES_NOT_END_WITH_ONE_OF
    return true unless value_from_properties

    criterion.value_to_match.string_list.values.none? do |ending|
      value_from_properties.end_with?(ending)
    end
  when :HIERARCHICAL_MATCH
    value_from_properties.start_with?(criterion.value_to_match.string)
  when :ALWAYS_TRUE
    true
  else
    @base_client.log.info("Unknown Operator: #{criterion.operator}")
    false
  end
end