Class: Aequitas::Rule::Guard

Inherits:

Object

• Object
• Aequitas::Rule::Guard

show all

Extended by:

ValueObject

Defined in:

lib/aequitas/rule/guard.rb

Instance Attribute Summary (collapse)

• - (Object) if_test readonly

  Returns the value of attribute if_test.

• - (Object) unless_test readonly

  Returns the value of attribute unless_test.

Attributes included from ValueObject

#equalizer

Instance Method Summary (collapse)

• - (Boolean) allow?(resource) private

  Determines if this RuleGuard allows the given resource by evaluating the if_test and unless_test.

• - (Object) evaluate_conditional_clause(resource, clause) private
• - (Guard) initialize(options = {}) constructor

  A new instance of Guard.

Methods included from ValueObject

equalize_on

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# File 'lib/aequitas/rule/guard.rb', line 15

def initialize(options = {})
  @if_test     = options.fetch(:if,     nil)
  @unless_test = options.fetch(:unless, nil)
end

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# File 'lib/aequitas/rule/guard.rb', line 12

def if_test
  @if_test
end

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# File 'lib/aequitas/rule/guard.rb', line 13

def unless_test
  @unless_test
end

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# File 'lib/aequitas/rule/guard.rb', line 30

def allow?(resource)
  if if_test
    !!evaluate_conditional_clause(resource, if_test)
  elsif unless_test
    !evaluate_conditional_clause(resource, unless_test)
  else
    true
  end
end

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# File 'lib/aequitas/rule/guard.rb', line 41

def evaluate_conditional_clause(resource, clause)
  if clause.respond_to?(:call)
    clause.call(resource)
  elsif clause.kind_of?(Symbol)
    resource.__send__(clause)
  end
end