Module: Featurevisor::Conditions

Defined in:
lib/featurevisor/conditions.rb

Overview

Conditions module for evaluating feature flags and segments

Class Method Summary collapse

Class Method Details

.condition_is_matched(condition, context, get_regex) ⇒ Boolean

Check if a condition is matched against context

Parameters:

  • condition (Hash) —

    Condition to evaluate

  • context (Hash) —

    Context to evaluate against

  • get_regex (Proc) —

    Function to get regex for pattern matching

Returns:

  • (Boolean) —

    True if condition matches



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# File 'lib/featurevisor/conditions.rb', line 27

def self.condition_is_matched(condition, context, get_regex)
  attribute = condition["attribute"] || condition[:attribute]
  operator = condition["operator"] || condition[:operator]
  value = condition["value"] || condition[:value]
  regex_flags = condition["regexFlags"] || condition[:regexFlags]

  context_value_from_path = get_value_from_context(context, attribute)

  case operator
  when "equals"
    context_value_from_path == value
  when "notEquals"
    context_value_from_path != value
  when "before", "after"
    # date comparisons
    value_in_context = context_value_from_path
    date_in_context = value_in_context.is_a?(Date) ? value_in_context : Date.parse(value_in_context.to_s)
    date_in_condition = value.is_a?(Date) ? value : Date.parse(value.to_s)

    if operator == "before"
      date_in_context < date_in_condition
    else
      date_in_context > date_in_condition
    end
  when "in", "notIn"
    # in / notIn (where condition value is an array)
    if value.is_a?(Array) && (context_value_from_path.is_a?(String) || context_value_from_path.is_a?(Numeric) || context_value_from_path.nil?)
      # Check if the attribute key actually exists in the context
      key_exists = context.key?(attribute.to_sym) || context.key?(attribute.to_s)

      # If key doesn't exist, notIn should fail (return false), in should also fail
      if !key_exists
        return false
      end

      value_in_context = context_value_from_path.to_s

      if operator == "in"
        value.include?(value_in_context)
      else # notIn
        !value.include?(value_in_context)
      end
    else
      false
    end
  when "contains", "notContains", "startsWith", "endsWith", "semverEquals", "semverNotEquals", "semverGreaterThan", "semverGreaterThanOrEquals", "semverLessThan", "semverLessThanOrEquals", "matches", "notMatches"
    # string operations
    if context_value_from_path.is_a?(String) && value.is_a?(String)
      value_in_context = context_value_from_path

      case operator
      when "contains"
        value_in_context.include?(value)
      when "notContains"
        !value_in_context.include?(value)
      when "startsWith"
        value_in_context.start_with?(value)
      when "endsWith"
        value_in_context.end_with?(value)
      when "semverEquals"
        Featurevisor.compare_versions(value_in_context, value) == 0
      when "semverNotEquals"
        Featurevisor.compare_versions(value_in_context, value) != 0
      when "semverGreaterThan"
        Featurevisor.compare_versions(value_in_context, value) == 1
      when "semverGreaterThanOrEquals"
        Featurevisor.compare_versions(value_in_context, value) >= 0
      when "semverLessThan"
        Featurevisor.compare_versions(value_in_context, value) == -1
      when "semverLessThanOrEquals"
        Featurevisor.compare_versions(value_in_context, value) <= 0
      when "matches"
        regex = get_regex.call(value, regex_flags || "")
        regex.match?(value_in_context)
      when "notMatches"
        regex = get_regex.call(value, regex_flags || "")
        !regex.match?(value_in_context)
      end
    else
      false
    end
  when "greaterThan", "greaterThanOrEquals", "lessThan", "lessThanOrEquals"
    # numeric operations
    if context_value_from_path.is_a?(Numeric) && value.is_a?(Numeric)
      value_in_context = context_value_from_path

      case operator
      when "greaterThan"
        value_in_context > value
      when "greaterThanOrEquals"
        value_in_context >= value
      when "lessThan"
        value_in_context < value
      when "lessThanOrEquals"
        value_in_context <= value
      end
    else
      false
    end
  when "exists"
    context_value_from_path != nil
  when "notExists"
    context_value_from_path.nil?
  when "includes", "notIncludes"
    # includes / notIncludes (where context value is an array)
    if context_value_from_path.is_a?(Array) && value.is_a?(String)
      value_in_context = context_value_from_path

      if operator == "includes"
        value_in_context.include?(value)
      else # notIncludes
        !value_in_context.include?(value)
      end
    else
      false
    end
  else
    false
  end
rescue => e
  # Log error but don't stop execution
  warn "Error in condition evaluation: #{e.message}"
  false
end

.get_value_from_context(obj, path) ⇒ Object?

Get value from context object using dot notation path

Parameters:

  • obj (Hash) —

    Context object

  • path (String) —

    Dot-separated path to the value

Returns:

  • (Object, nil) —

    Value at the path or nil if not found



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# File 'lib/featurevisor/conditions.rb', line 12

def self.get_value_from_context(obj, path)
  return nil if obj.nil? || path.nil?

  if path.index(".") == -1
    return obj[path.to_sym] || obj[path]
  end

  path.split(".").reduce(obj) { |o, i| o&.[](i.to_sym) || o&.[](i) }
end