Module: LogicHelper

Included in:
RuleEvaluator
Defined in:
lib/rast/rules/logic_helper.rb

Overview

Provides logic evaluation functionalities.

Constant Summary collapse

TRUE =

/**

* Custom logical AND/OR evaluator.
*
* @author Royce
*/

'*true'
FALSE = 
'*false'
OPPOSITE = 
{
  TRUE => FALSE,
  FALSE => TRUE
}.freeze
LOGIC_PRIMARY_RESULT = 
{
  and: FALSE,
  or: TRUE
}.freeze

Instance Method Summary collapse

Instance Method Details

#close_bracket?(token: '') ⇒ Boolean

/**

* Check if the token is closing bracket.
*
* @param token Input <code>String</code> token
* @return <code>boolean</code> output
*/

Returns:

  • (Boolean) 


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# File 'lib/rast/rules/logic_helper.rb', line 59

def close_bracket?(token: '')
  token == ')'
end

#open_bracket?(token: '') ⇒ Boolean

/**

* Check if the token is opening bracket.
*
* @token Input <code>String</code> token
* @return <code>boolean</code> output
*/

Returns:

  • (Boolean) 


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# File 'lib/rast/rules/logic_helper.rb', line 49

def open_bracket?(token: '')
  token == '('
end

#perform_logical(scenario: [], left: {}, right: {}, operation: :nil) ⇒ Object

/**

* @scenario list of scenario tokens.
* @left left left token object.
* @right right right token object.
* @operation :and or :or.
* @returns String boolean value, can be internal, thus it is string.
*/



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# File 'lib/rast/rules/logic_helper.rb', line 31

def perform_logical(scenario: [], left: {}, right: {}, operation: :nil)
  evaluated = both_internal?(left, right, operation)
  return evaluated if evaluated

  default = operation == :and ? TRUE : FALSE
  return present?(scenario, right).to_s if internal_match?(default, left)

  return present?(scenario, left).to_s if internal_match?(default, right)

  send("evaluate_#{operation}", scenario, left, right).to_s
end