Module: Trebuchet::Strategy::PercentableDeprecated

Included in:
PercentDeprecated, VisitorPercentDeprecated
Defined in:
lib/trebuchet/strategy.rb

Overview

This module is deprecated because the implementation is such that it’s not possible to trust per-feature analysis if multiple features are using the PercentableDeprecated based strategies because the same visitors will tend to get the same features (even with the offset).

Instance Method Summary collapse

Instance Method Details

#export ⇒ Object 



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# File 'lib/trebuchet/strategy.rb', line 224

def export
  if @style == :percentage
    super :percentage => @to
  else
    super :from => @from, :to => @to
  end
end

#initialize(options) ⇒ Object 



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# File 'lib/trebuchet/strategy.rb', line 153

def initialize(options)
  set_range_from_options(options)
end

#offset ⇒ Object 



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# File 'lib/trebuchet/strategy.rb', line 177

def offset
  if @style == :percentage
    feature_id % 100
  else
    0
  end
end

#offset_from ⇒ Object 



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# File 'lib/trebuchet/strategy.rb', line 201

def offset_from
  (@from + offset) % 100
end

#offset_to ⇒ Object 



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# File 'lib/trebuchet/strategy.rb', line 205

def offset_to
  (@to + offset) % 100
end

#percentage ⇒ Object 



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# File 'lib/trebuchet/strategy.rb', line 185

def percentage
  return 0 unless @to.is_a?(Integer) && @from.is_a?(Integer)
  return 0 if @to < 0
  ((@to - @from) + 100) % 100 + 1
end

#set_range_from_options(options) ⇒ Object

must be called from initialize



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# File 'lib/trebuchet/strategy.rb', line 158

def set_range_from_options(options)
  if options == nil || options.is_a?(Numeric)
    @from = 0
    @to = options.to_i - 1
    @style = :percentage
  elsif options.is_a?(Hash) && (p = options['percentage'] || options[:percentage])
    @from = 0
    @to = p.to_i - 1
    @style = :percentage
  elsif options.is_a?(Hash)
    @from = options['from'] || options[:from]
    @to = options['to'] || options[:to]
    @style = :range
  else
    @from = 0
    @to = -1
  end
end

#to_s ⇒ Object 



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# File 'lib/trebuchet/strategy.rb', line 209

def to_s
  kind = self.name == :visitor_percent ? "visitors" : "users"
  percentage_str = "#{percentage}% of #{kind}"
  range_str = if @to < 0
    "nobody"
  else
    str = ''
    str << "user id ending with " if kind != "visitors"
    str << "#{offset_from.to_s.rjust(2, '0')}"
    str << " to #{offset_to.to_s.rjust(2, '0')}" if @to != @from
    str
  end
  @style == :range ? "#{range_str} (#{percentage_str})" : "#{percentage_str} (#{range_str})"
end

#value_in_range?(value) ⇒ Boolean

call from launch_at? and pass in user id or another integer

Returns:

  • (Boolean) 


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# File 'lib/trebuchet/strategy.rb', line 192

def value_in_range?(value)
  return false unless @from && @to
  return false if @from.to_i < 0 || @to.to_i < 0
  return false if value == nil || !value.is_a?(Numeric)
  cutoff = percentage
  value = ((value - @from) + 200 - offset) % 100
  !!(value < cutoff)
end