Class: Gitlab::Experiment::Context

Inherits:
Object
  • Object
show all
Includes:
Cookies
Defined in:
lib/gitlab/experiment/context.rb

Constant Summary collapse

DNT_REGEXP = 
/^(true|t|yes|y|1|on)$/i.freeze

Instance Method Summary collapse

Constructor Details

#initialize(experiment, **initial_value) ⇒ Context

Returns a new instance of Context.



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# File 'lib/gitlab/experiment/context.rb', line 12

def initialize(experiment, **initial_value)
  @experiment = experiment
  @value = {}
  @migrations = { merged: [], unmerged: [] }

  value(initial_value)
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method_name) ⇒ Object 



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# File 'lib/gitlab/experiment/context.rb', line 47

def method_missing(method_name, *)
  @value.include?(method_name.to_sym) ? @value[method_name.to_sym] : super
end

Instance Method Details

#freeze ⇒ Object 



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# File 'lib/gitlab/experiment/context.rb', line 38

def freeze
  signature # finalize before freezing
  super
end

#reinitialize(request) ⇒ Object 



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# File 'lib/gitlab/experiment/context.rb', line 20

def reinitialize(request)
  @signature = nil # clear memoization
  @request = request if request.respond_to?(:headers) && request.respond_to?(:cookie_jar)
end

#respond_to_missing?(method_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gitlab/experiment/context.rb', line 51

def respond_to_missing?(method_name, *)
  @value.include?(method_name.to_sym) ? true : super
end

#signature ⇒ Object 



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# File 'lib/gitlab/experiment/context.rb', line 43

def signature
  @signature ||= { key: @experiment.key_for(@value), migration_keys: migration_keys }.compact
end

#trackable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gitlab/experiment/context.rb', line 34

def trackable?
  !(@request && @request.headers['DNT'].to_s.match?(DNT_REGEXP))
end

#value(value = nil) ⇒ Object 



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# File 'lib/gitlab/experiment/context.rb', line 25

def value(value = nil)
  return @value if value.nil?

  value = value.dup # dup so we don't mutate
  reinitialize(value.delete(:request))

  @value.merge!(process_migrations(value))
end