Class: Subflag::Rails::ContextBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/subflag/rails/context_builder.rb

Overview

Builds OpenFeature evaluation context from user objects and additional attributes

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(user: nil, context: nil) ⇒ ContextBuilder

Returns a new instance of ContextBuilder.



38
39
40
41
 
# File 'lib/subflag/rails/context_builder.rb', line 38

def initialize(user: nil, context: nil)
  @user = user
  @context = context || {}
end

Class Method Details

.build(user: nil, context: nil) ⇒ OpenFeature::SDK::EvaluationContext?

Build an OpenFeature EvaluationContext

Parameters:

  • user (Object, nil) (defaults to: nil) —

    The user object for targeting

  • context (Hash, nil) (defaults to: nil) —

    Additional context attributes

Returns:

  • (OpenFeature::SDK::EvaluationContext, nil) —

    The combined context or nil if empty



12
13
14
 
# File 'lib/subflag/rails/context_builder.rb', line 12

def self.build(user: nil, context: nil)
  new(user: user, context: context).build
end

.to_hash(evaluation_context) ⇒ Hash?

Convert an OpenFeature EvaluationContext (or nil) into a plain Hash suitable for Flag#evaluate / TargetingEngine.

Parameters:

  • evaluation_context (OpenFeature::SDK::EvaluationContext, nil)

Returns:

  • (Hash, nil) 


21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
 
# File 'lib/subflag/rails/context_builder.rb', line 21

def self.to_hash(evaluation_context)
  return nil if evaluation_context.nil?

  if evaluation_context.respond_to?(:to_h)
    evaluation_context.to_h
  elsif evaluation_context.respond_to?(:fields)
    evaluation_context.fields
  else
    hash = {}
    evaluation_context.instance_variables.each do |var|
      key = var.to_s.delete("@")
      hash[key] = evaluation_context.instance_variable_get(var)
    end
    hash
  end
end

Instance Method Details

#build ⇒ OpenFeature::SDK::EvaluationContext?

Build the OpenFeature EvaluationContext

Returns:

  • (OpenFeature::SDK::EvaluationContext, nil) 


46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
 
# File 'lib/subflag/rails/context_builder.rb', line 46

def build
  result = {}

  # Add user context if configured
  if @user
    user_context = configuration.build_user_context(@user)
    result.merge!(user_context) if user_context
  end

  # Merge in additional context (overrides user context)
  result.merge!(@context) if @context.is_a?(Hash)

  # Return nil if empty (no context to send)
  return nil if result.empty?

  # Convert to OpenFeature EvaluationContext
  normalized = normalize_context(result)
  OpenFeature::SDK::EvaluationContext.new(**normalized)
end