Module: Quonfig::Reason

Defined in:
lib/quonfig/reason.rb

Overview

Computes the why of an evaluation — the symbol that explains which code path selected the returned value. Mirrors sdk-node/src/reason.ts.

:DEFAULT     — config has no targeting rules; matched value is the static default
:RULE_MATCH  — at least one targeting rule exists on the config (the matched
               conditional may itself be ALWAYS_TRUE, but the *config* is targeted)
:SPLIT       — matched value came from a non-default weighted variant
:ERROR       — evaluation failed
:UNKNOWN     — unable to determine

Constant Summary collapse

UNKNOWN = 
:UNKNOWN
DEFAULT = 
:DEFAULT
RULE_MATCH = 
:RULE_MATCH
SPLIT = 
:SPLIT
ERROR = 
:ERROR

Class Method Summary collapse

Class Method Details

.compute(config:, conditional_value:, weighted_value_index: nil) ⇒ Object 



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# File 'lib/quonfig/reason.rb', line 22

def compute(config:, conditional_value:, weighted_value_index: nil)
  return SPLIT if weighted_value_index && weighted_value_index.positive?
  return RULE_MATCH if targeting_rules?(config)
  return RULE_MATCH if non_always_true_criteria?(conditional_value)
  DEFAULT
end

.non_always_true_criteria?(conditional_value) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/quonfig/reason.rb', line 35

def non_always_true_criteria?(conditional_value)
  conditional_value.criteria.any? { |c| c.operator != :ALWAYS_TRUE }
end

.targeting_rules?(config) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/quonfig/reason.rb', line 29

def targeting_rules?(config)
  config.rows.any? do |row|
    row.values.any? { |cv| non_always_true_criteria?(cv) }
  end
end