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print: add elapsed + eta. #14

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print: add elapsed + eta. #14

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23 changes: 22 additions & 1 deletion src/progress.cr
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ class ProgressBar
def initialize(@total = 100, @step = 1, @width = 100, @complete = "\u2593", @incomplete = "\u2591", use_stdout = false)
@current = 0.0
@output_stream = use_stdout ? STDOUT : STDERR
@start = Time.monotonic
end

def inc
Expand Down Expand Up @@ -54,12 +55,32 @@ class ProgressBar

private def print(percent)
@output_stream.flush
@output_stream.print "[#{@complete * position}#{@incomplete * (@width - position)}] #{percent} % \r"
@output_stream.print "[#{@complete * position}#{@incomplete * remaining}] #{percent} % Elapsed: #{round(elapsed)} ETA: #{eta}\r"
@output_stream.flush
@output_stream.print "\n" if done?
end

private def position
((@current.to_f * @width.to_f) / @total).to_i
end

private def remaining
@width - position
end

private def elapsed
Time.monotonic - @start
end

private def round(t)
Time::Span.new(seconds: t.total_seconds.to_i, nanoseconds: 0)
end

private def eta
if position > 0
round(elapsed * (remaining.to_f / position))
else
"--"
end
end
end