module FieldTest

# File lib/field_test.rb, line 41
def self.cache
  config["cache"]
end

# File lib/field_test.rb, line 29
def self.config
  @config ||= YAML.load(ERB.new(File.read(config_path)).result)
end

# File lib/field_test.rb, line 24
def self.config_path
  path = defined?(Rails) ? Rails.root : File
  path.join("config", "field_test.yml")
end

# File lib/field_test.rb, line 45
def self.cookies
  config.key?("cookies") ? config["cookies"] : true
end

# File lib/field_test.rb, line 57
def self.events_supported?
  unless defined?(@events_supported)
    connection = FieldTest::Membership.connection
    table_name = "field_test_events"
    @events_supported =
      if connection.respond_to?(:data_source_exists?)
        connection.data_source_exists?(table_name)
      else
        connection.table_exists?(table_name)
      end
  end
  @events_supported
end

# File lib/field_test.rb, line 37
def self.exclude_bots?
  config["exclude"] && config["exclude"]["bots"]
end

# File lib/field_test.rb, line 33
def self.excluded_ips
  @excluded_ips ||= Array(config["exclude"] && config["exclude"]["ips"]).map { |ip| IPAddr.new(ip) }
end

# File lib/field_test.rb, line 49
def self.legacy_participants
  config["legacy_participants"]
end

# File lib/field_test.rb, line 71
def self.mask_ip(ip)
  addr = IPAddr.new(ip)
  if addr.ipv4?
    # set last octet to 0
    addr.mask(24).to_s
  else
    # set last 80 bits to zeros
    addr.mask(48).to_s
  end
end

# File lib/field_test.rb, line 53
def self.precision
  config["precision"] || 0
end