Class: Statsig::ResponseFormatter

Inherits:
Object
  • Object
show all
Defined in:
lib/client_initialize_helpers.rb

Class Method Summary collapse

Class Method Details

.clean_exposures(exposures) ⇒ Object 



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# File 'lib/client_initialize_helpers.rb', line 101

def self.clean_exposures(exposures)
  seen = {}
  exposures.reject do |exposure|
    key = "#{exposure[:gate]}|#{exposure[:gateValue]}|#{exposure[:ruleID]}}"
    should_reject = seen[key]
    seen[key] = true
    should_reject == true
  end
end

.get_responses(entities, evaluator, user, client_sdk_key, hash_algo, include_exposures: true, include_local_overrides: false) ⇒ Object 



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# File 'lib/client_initialize_helpers.rb', line 7

def self.get_responses(
  entities,
  evaluator,
  user,
  client_sdk_key,
  hash_algo,
  include_exposures: true,
  include_local_overrides: false
)
  result = {}
  entities.each do |name, spec|
    hashed_name, value = to_response(name, spec, evaluator, user, client_sdk_key, hash_algo, include_exposures, include_local_overrides)
    if !hashed_name.nil? && !value.nil?
      result[hashed_name] = value
    end
  end

  result
end

.hash_name(name, hash_algo) ⇒ Object 



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# File 'lib/client_initialize_helpers.rb', line 149

def self.hash_name(name, hash_algo)
  case hash_algo
  when Statsig::Const::NONE
    return name
  when Statsig::Const::DJB2
    return Statsig::HashUtils.djb2(name)
  else
    return Statsig::HashUtils.sha256(name)
  end
end

.populate_experiment_fields(config_name, config_spec, eval_result, result, evaluator) ⇒ Object 



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# File 'lib/client_initialize_helpers.rb', line 111

def self.populate_experiment_fields(config_name, config_spec, eval_result, result, evaluator)
  result[:is_user_in_experiment] = eval_result.is_experiment_group
  result[:is_experiment_active] = config_spec.is_active == true

  if config_spec.has_shared_params != true
    return
  end

  result[:is_in_layer] = true
  result[:explicit_parameters] = config_spec.explicit_parameters || []

  layer_name = evaluator.spec_store.experiment_to_layer[config_name]
  if layer_name.nil? || evaluator.spec_store.layers[layer_name].nil?
    return
  end

  layer = evaluator.spec_store.layers[layer_name]
  result[:value] = layer[:defaultValue].merge(result[:value])
end

.populate_layer_fields(config_spec, eval_result, result, evaluator, hash_algo, include_exposures) ⇒ Object 



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# File 'lib/client_initialize_helpers.rb', line 131

def self.populate_layer_fields(config_spec, eval_result, result, evaluator, hash_algo, include_exposures)
  delegate = eval_result.config_delegate
  result[:explicit_parameters] = config_spec.explicit_parameters || []

  if delegate.nil? == false && delegate.empty? == false
    delegate_spec = evaluator.spec_store.configs[delegate]

    result[:allocated_experiment_name] = hash_name(delegate, hash_algo)
    result[:is_user_in_experiment] = eval_result.is_experiment_group
    result[:is_experiment_active] = delegate_spec.is_active == true
    result[:explicit_parameters] = delegate_spec.explicit_parameters || []
  end

  if include_exposures
    result[:undelegated_secondary_exposures] = clean_exposures(eval_result.undelegated_sec_exps || [])
  end
end

.to_response(config_name, config_spec, evaluator, user, client_sdk_key, hash_algo, include_exposures, include_local_overrides) ⇒ Object 



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# File 'lib/client_initialize_helpers.rb', line 27

def self.to_response(config_name, config_spec, evaluator, user, client_sdk_key, hash_algo, include_exposures, include_local_overrides)
  target_app_id = evaluator.spec_store.get_app_id_for_sdk_key(client_sdk_key)
  config_target_apps = config_spec.target_app_ids

  unless target_app_id.nil? || (!config_target_apps.nil? && config_target_apps.include?(target_app_id))
    return nil
  end

  category = config_spec.type
  entity_type = config_spec.entity
  if entity_type == :segment || entity_type == :holdout
    return nil
  end

  if include_local_overrides
    case category
    when :feature_gate
      local_override = evaluator.lookup_gate_override(config_name)
    when :dynamic_config
      local_override = evaluator.lookup_config_override(config_name)
    end
  end

  if local_override.nil?
    eval_result = ConfigResult.new(
      name: config_name,
      disable_evaluation_details: true,
      disable_exposures: !include_exposures
    )
    evaluator.eval_spec(user, config_spec, eval_result)
  else
    eval_result = local_override
  end

  result = {}

  result[:id_type] = eval_result.id_type
  unless eval_result.group_name.nil?
    result[:group_name] = eval_result.group_name
  end

  case category
  when :feature_gate
    result[:value] = eval_result.gate_value
  when :dynamic_config
    id_type = config_spec.id_type
    result[:value] = eval_result.json_value
    result[:group] = eval_result.rule_id
    result[:is_device_based] = id_type.is_a?(String) && id_type.downcase == Statsig::Const::STABLEID
  else
    return nil
  end

  if entity_type == :experiment
    populate_experiment_fields(name, config_spec, eval_result, result, evaluator)
  end

  if entity_type == :layer
    populate_layer_fields(config_spec, eval_result, result, evaluator, hash_algo, include_exposures)
    result.delete(:id_type) # not exposed for layer configs in /initialize
  end

  hashed_name = hash_name(config_name, hash_algo)

  result[:name] = hashed_name
  result[:rule_id] = eval_result.rule_id

  if include_exposures
    result[:secondary_exposures] = clean_exposures(eval_result.secondary_exposures)
  end

  [hashed_name, result]
end