Class: Zold::Score

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

Overview

Score

Constant Summary collapse

DEFAULT_STRENGTH = 
8
ZERO = 
Score.new(Time.now, 'localhost', 80)

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(time, host, port, suffixes = [], strength: DEFAULT_STRENGTH) ⇒ Score

time: UTC ISO 8601 string



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# File 'lib/zold/score.rb', line 34

def initialize(time, host, port, suffixes = [], strength: DEFAULT_STRENGTH)
  raise 'Time must be of type Time' unless time.is_a?(Time)
  raise 'Port must be of type Integer' unless port.is_a?(Integer)
  @time = time
  @host = host
  @port = port
  @suffixes = suffixes
  @strength = strength
end

Instance Attribute Details

#host ⇒ Object (readonly)

Returns the value of attribute host.



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# File 'lib/zold/score.rb', line 32

def host
  @host
end

#port ⇒ Object (readonly)

Returns the value of attribute port.



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# File 'lib/zold/score.rb', line 32

def port
  @port
end

#time ⇒ Object (readonly)

Returns the value of attribute time.



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# File 'lib/zold/score.rb', line 32

def time
  @time
end

Class Method Details

.parse(text, strength: DEFAULT_STRENGTH) ⇒ Object 



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# File 'lib/zold/score.rb', line 46

def self.parse(text, strength: DEFAULT_STRENGTH)
  _, time, host, port, suffixes = text.split(' ', 5)
  Score.new(
    Time.parse(time), host, port.to_i,
    suffixes.split(' '), strength: strength
  )
end

Instance Method Details

#next ⇒ Object 



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# File 'lib/zold/score.rb', line 73

def next
  raise 'This score is not valid' unless valid?
  idx = 0
  loop do
    suffix = idx.to_s(16)
    score = Score.new(
      @time, @host, @port, @suffixes + [suffix],
      strength: @strength
    )
    return score if score.valid?
    idx += 1
  end
end

#reduced(max = 4) ⇒ Object 



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# File 'lib/zold/score.rb', line 69

def reduced(max = 4)
  Score.new(@time, @host, @port, @suffixes[0..max - 1], strength: @strength)
end

#to_h ⇒ Object 



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# File 'lib/zold/score.rb', line 58

def to_h
  {
    value: value,
    host: @host,
    port: @port,
    time: @time.utc.iso8601,
    suffixes: @suffixes,
    strength: @strength
  }
end

#to_s ⇒ Object 



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# File 'lib/zold/score.rb', line 54

def to_s
  "#{value}: #{@time.utc.iso8601} #{@host} #{@port} #{@suffixes.join(' ')}"
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/zold/score.rb', line 87

def valid?
  start = "#{@time.utc.iso8601} #{@host} #{@port}"
  @suffixes.reduce(start) do |prefix, suffix|
    hex = Digest::SHA256.hexdigest(prefix + ' ' + suffix)
    return false unless hex.end_with?('0' * @strength)
    hex[0, 19]
  end
  true
end

#value ⇒ Object 



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# File 'lib/zold/score.rb', line 97

def value
  @suffixes.length
end