Class: AwsLogs::Since

Inherits:
Object
  • Object
show all
Defined in:
lib/aws_logs/since.rb

Constant Summary collapse

DEFAULT = 
10.minutes.to_i
ISO8601_REGEXP = 
/\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}/
FRIENDLY_REGEXP = 
/(\d+)(\w+)/

Instance Method Summary collapse

Constructor Details

#initialize(str) ⇒ Since

Returns a new instance of Since.



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# File 'lib/aws_logs/since.rb', line 9

def initialize(str)
  @str = str
end

Instance Method Details

#find_match(regexp) ⇒ Object 



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# File 'lib/aws_logs/since.rb', line 55

def find_match(regexp)
  md = @str.match(regexp)
  if md
    number, unit = md[1].to_i, md[2]
  end
  [number, unit]
end

#friendly_format? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/aws_logs/since.rb', line 35

def friendly_format?
  !!@str.match(FRIENDLY_REGEXP)
end

#friendly_seconds ⇒ Object 



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# File 'lib/aws_logs/since.rb', line 39

def friendly_seconds
  number, unit = find_match(FRIENDLY_REGEXP)
  unless number && unit
    puts warning
    return DEFAULT
  end

  meth = shorthand(unit)
  if number.respond_to?(meth)
    number.send(meth).to_i
  else
    puts warning
    return DEFAULT
  end
end

#iso8601_format? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/aws_logs/since.rb', line 25

def iso8601_format?
  !!@str.match(ISO8601_REGEXP)
end

#iso8601_seconds ⇒ Object 



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# File 'lib/aws_logs/since.rb', line 29

def iso8601_seconds
  # https://stackoverflow.com/questions/3775544/how-do-you-convert-an-iso-8601-date-to-a-unix-timestamp-in-ruby
  Time.iso8601(@str.sub(/ /,'T')).to_i
end

#shorthand(k) ⇒ Object

s - seconds m - minutes h - hours d - days w - weeks



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# File 'lib/aws_logs/since.rb', line 72

def shorthand(k)
  map = {
    s: :seconds,
    m: :minutes,
    h: :hours,
    d: :days,
    w: :weeks,
  }
  map[k.to_sym] || k
end

#to_i ⇒ Object 



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# File 'lib/aws_logs/since.rb', line 13

def to_i
  if iso8601_format?
    iso8601_seconds
  elsif friendly_format?
    friendly_seconds
  else
    puts warning
    return DEFAULT
  end
end

#warning ⇒ Object 



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# File 'lib/aws_logs/since.rb', line 63

def warning
  "WARN: since is not in a supported format. Falling back to 10m".color(:yellow)
end