class SimpleETA

Usage example:

eta = SimpleETA::ETA.new(100)
100.times { |i| sleep 1; eta.next! }

> [59/100] 59.00% ETA 00m 41s¶ ↑

Constants

DEFAULT_FMT
KEYWORDS

Public Class Methods

new(total, opts = {}) click to toggle source

# File lib/simple_eta.rb, line 17
def initialize(total, opts = {})
  reset!(opts)
  @total = total.to_i
  @format = opts[:format] || DEFAULT_FMT
  KEYWORDS.each do |keyword, val|
    @format.gsub!(keyword, val)
  end
end

Public Instance Methods

next!() click to toggle source

# File lib/simple_eta.rb, line 31
def next!
  @current += 1
  show
end

reset!(opts = {}) click to toggle source

# File lib/simple_eta.rb, line 26
def reset!(opts = {})
  @start_time = opts[:start_time] || Time.now
  @current = 0
end

show() click to toggle source

# File lib/simple_eta.rb, line 36
def show
  current = @current
  print(@format % [@total, current, percent(current), duration, eta(current)])
  print("\n") if current == @total
end

Private Instance Methods

duration() click to toggle source

# File lib/simple_eta.rb, line 48
def duration
  dur = (Time.now - @start_time).to_i
  "%02dm %02ds" % [(dur/60), (dur%60)]
end

eta(current) click to toggle source

# File lib/simple_eta.rb, line 53
def eta(current)
  if current > 0 && current <= @total
    dur = (Time.now - @start_time).to_i
    remaining = dur * (@total - current) / current
    "%02dm %02ds" % [(remaining/60), (remaining%60)]
  else
    "--m --s"
  end
end

percent(current) click to toggle source

# File lib/simple_eta.rb, line 43
def percent(current)
  return 100.0 if @total.to_i <= 0
  current * 100 / @total.to_f
end