Module: Smplkit::Flags::JsonLogicEvaluator Private

Defined in:
lib/smplkit/flags/client.rb

Overview

This module is part of a private API. You should avoid using this module if possible, as it may be removed or be changed in the future.

Vendored minimal JSON Logic evaluator covering the operators the smplkit platform ships in flag rules.

Stays in-tree so the Ruby SDK doesn’t depend on the json_logic gem being correct — the Java SDK followed the same pattern. Operators supported: ==, !=, <, <=, >, >=, in, var, and, or, !, if, missing, none.

Class Method Summary collapse

Class Method Details

.apply(logic, data) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/smplkit/flags/client.rb', line 877

def apply(logic, data)
  return logic unless logic.is_a?(Hash)
  return logic if logic.empty?

  op, values = logic.first
  values = [values] unless values.is_a?(Array)

  case op
  when "var"
    resolve_var(values[0], data, values[1])
  when "and"
    values.reduce(true) { |acc, v| acc && truthy?(apply(v, data)) }
  when "or"
    values.reduce(false) { |acc, v| acc || truthy?(apply(v, data)) }
  when "!"
    !truthy?(apply(values[0], data))
  when "if"
    eval_if(values, data)
  when "==", "==="
    apply(values[0], data) == apply(values[1], data)
  when "!=", "!=="
    apply(values[0], data) != apply(values[1], data)
  when "<"
    compare(values, data) { |a, b| a < b }
  when "<="
    compare(values, data) { |a, b| a <= b }
  when ">"
    compare(values, data) { |a, b| a > b }
  when ">="
    compare(values, data) { |a, b| a >= b }
  when "in"
    eval_in(values, data)
  when "missing"
    eval_missing(values, data)
  when "none"
    values_arr = apply(values[0], data) || []
    inner = values[1]
    values_arr.is_a?(Array) && values_arr.none? { |item| truthy?(apply(inner, item)) }
  else
    false
  end
end

.compare(values, data) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/smplkit/flags/client.rb', line 947

def compare(values, data)
  applied = values.map { |v| apply(v, data) }
  return false if applied.any?(&:nil?)

  if applied.length == 2
    yield(applied[0], applied[1])
  elsif applied.length == 3
    yield(applied[0], applied[1]) && yield(applied[1], applied[2])
  else
    false
  end
rescue ArgumentError, TypeError
  false
end

.eval_if(values, data) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/smplkit/flags/client.rb', line 962

def eval_if(values, data)
  i = 0
  while i + 1 < values.length
    return apply(values[i + 1], data) if truthy?(apply(values[i], data))

    i += 2
  end
  i < values.length ? apply(values[i], data) : nil
end

.eval_in(values, data) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/smplkit/flags/client.rb', line 972

def eval_in(values, data)
  needle = apply(values[0], data)
  haystack = apply(values[1], data)
  return false if haystack.nil?

  haystack.include?(needle)
rescue NoMethodError, TypeError
  false
end

.eval_missing(values, data) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/smplkit/flags/client.rb', line 982

def eval_missing(values, data)
  keys = values.is_a?(Array) ? values.flatten : [values]
  keys.reject { |k| present?(resolve_var(k, data)) }
end

.present?(value) ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean) 


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# File 'lib/smplkit/flags/client.rb', line 987

def present?(value)
  !(value.nil? || value == "")
end

.resolve_var(path, data, default = nil) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/smplkit/flags/client.rb', line 930

def resolve_var(path, data, default = nil)
  return data if path.nil? || path == "" || path == []

  keys = path.is_a?(Array) ? path : path.to_s.split(".")
  keys.reduce(data) do |scope, key|
    break default if scope.nil?

    if scope.is_a?(Hash)
      scope[key] || scope[key.to_s] || scope[key.to_sym]
    elsif scope.is_a?(Array) && key.to_s =~ /\A\d+\z/
      scope[key.to_i]
    else
      default
    end
  end || default
end

.truthy?(value) ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean) 


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# File 'lib/smplkit/flags/client.rb', line 920

def truthy?(value)
  return false if value.nil?
  return false if value == false
  return false if value.is_a?(Numeric) && value.zero?
  return false if value == ""
  return false if value == []

  true
end