Class: Pbw::Utils::Chance

Inherits:
Object
  • Object
show all
Defined in:
lib/pbw/utils/chance.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(chance = 0, score = 0, dice = Dice.new) ⇒ Chance

Returns a new instance of Chance.



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# File 'lib/pbw/utils/chance.rb', line 25

def initialize(chance = 0, score = 0, dice = Dice.new)
  @chance = chance
  @score = score
  @dice = dice
  @rolled = 0
end

Instance Attribute Details

#chance ⇒ Object

Returns the value of attribute chance.



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# File 'lib/pbw/utils/chance.rb', line 4

def chance
  @chance
end

#dice ⇒ Object

Returns the value of attribute dice.



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# File 'lib/pbw/utils/chance.rb', line 4

def dice
  @dice
end

#rolled ⇒ Object

Returns the value of attribute rolled.



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# File 'lib/pbw/utils/chance.rb', line 4

def rolled
  @rolled
end

#score ⇒ Object

Returns the value of attribute score.



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# File 'lib/pbw/utils/chance.rb', line 4

def score
  @score
end

Class Method Details

.demongoize(object) ⇒ Object 



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# File 'lib/pbw/utils/chance.rb', line 36

def self.demongoize(object)
  read(object.to_s)
end

.evolve(object) ⇒ Object 



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# File 'lib/pbw/utils/chance.rb', line 44

def self.evolve(object)
  object.mongoize if object.is_a?(::Pbw::Utils::Chance)
end

.mongoize(object) ⇒ Object 



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# File 'lib/pbw/utils/chance.rb', line 40

def self.mongoize(object)
  object.mongoize if object.is_a?(::Pbw::Utils::Chance)
end

.read(s) ⇒ Object 



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# File 'lib/pbw/utils/chance.rb', line 6

def self.read(s)
  return nil if s.blank?
  begin
    if s.include?("in")
      a = s.split(" in ")
      chance = a[0].to_i
      dice = Dice.read(a[1])
      ::Pbw::Utils::Chance.new(chance,0,dice)
    else
      a = s.split(" on ")
      score = a[0].to_i
      dice = Dice.read(a[1])
      ::Pbw::Utils::Chance.new(0,score,dice)
    end
  rescue
    raise "Invalid chance format"
  end
end

Instance Method Details

#+(n) ⇒ Object 



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# File 'lib/pbw/utils/chance.rb', line 52

def +(n)
  ::Pbw::Utils::Chance.new(chance, score, (self.dice + n))
end

#-(n) ⇒ Object 



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# File 'lib/pbw/utils/chance.rb', line 56

def -(n)
  ::Pbw::Utils::Chance.new(chance, score, (self.dice - n))
end

#<(c) ⇒ Object 



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# File 'lib/pbw/utils/chance.rb', line 60

def <(c)
  return false unless c
  if c.is_a?(Chance)
    (self.probability_of_success < c.probability_of_success)
  else
    (self.probability_of_success < c.to_f)
  end
end

#>(c) ⇒ Object 



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# File 'lib/pbw/utils/chance.rb', line 69

def >(c)
  return true unless c
  if c.is_a?(Chance)
    (self.probability_of_success > c.probability_of_success)
  else
    (self.probability_of_success > c.to_f)
  end
end

#blank? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pbw/utils/chance.rb', line 48

def blank?
  chance == 0
end

#mongoize ⇒ Object 



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# File 'lib/pbw/utils/chance.rb', line 32

def mongoize
  to_s
end

#percentage_success ⇒ Object 



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# File 'lib/pbw/utils/chance.rb', line 93

def percentage_success
  (probability_of_success * 100).round(0).to_i
end

#probability_of_success ⇒ Object 



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# File 'lib/pbw/utils/chance.rb', line 78

def probability_of_success
  return @probability_of_success if @probability_of_success
  return 0 unless dice
  prob = dice.probabilities
  @probability_of_success = 0
  prob.keys.each do |hit|
    if chance && chance > 0
      @probability_of_success += prob[hit] if hit <= chance && hit != dice.min
    elsif score && score > 0
      @probability_of_success += prob[hit] if hit >= score && hit != dice.min
    end
  end
  @probability_of_success
end

#success? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pbw/utils/chance.rb', line 97

def success?
  return false unless dice
  self.rolled = dice.roll
  return false if self.rolled == dice.min
  if score > 0
    self.rolled >= score
  else
    self.rolled <= chance
  end
end

#to_pretty ⇒ Object Also known as: pp 



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# File 'lib/pbw/utils/chance.rb', line 116

def to_pretty
  "#{to_s} (#{percentage_success}% chance)"
end

#to_s ⇒ Object 



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# File 'lib/pbw/utils/chance.rb', line 108

def to_s
  if score > 0
    "#{score} on #{dice}"
  elsif chance > 0
    "#{chance} in #{dice}"
  end
end