Class: GRI::Sgraph

Inherits:
Object show all
Defined in:
lib/gri/sgraph.rb

Constant Summary collapse

BARS = 
[" ",  "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█" ]
TERMS = 
{'sh'=>['Hour', 3600], 's8h'=>['8Hours', 8*3600],
'd'=>['Day', 24*3600], 'w'=>['Week', 7*24*3600],
'm'=>['Month', 31*24*3600], 'y'=>['Year', 366*24*3600]}

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Sgraph

Returns a new instance of Sgraph.



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# File 'lib/gri/sgraph.rb', line 6

def initialize options
  @options = options
end

Instance Method Details

#bar(val, unit, non_fullwidth_font = false) ⇒ Object 



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# File 'lib/gri/sgraph.rb', line 11

def bar(val, unit, non_fullwidth_font = false)
  n = (val.to_f/unit)
  @height.times.map{|i|
    x = n - (i * 8)
    if x <= 0
      BARS.first
    else
      bar_symbol = if x < 8
                     BARS[x]
                   else
                     BARS.last
                   end
      bar_symbol += " " if non_fullwidth_font
      bar_symbol
    end
  }
end

#render(json, summary, url = nil) ⇒ Object 



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# File 'lib/gri/sgraph.rb', line 29

def render(json, summary, url = nil)
  #@options = {:t=>'d', :non_fullwidth_font=>false}
  @height = 16
  rowss = json['data']
  meta = json['meta']
  step    = meta['step']
  start_timestamp = meta["start"]
  end_timestamp   = meta["end"].to_i
  s = Time.at(start_timestamp).localtime.strftime("%Y-%m-%d %H:%M:%S")
  e = Time.at(end_timestamp  ).localtime.strftime("%Y-%m-%d %H:%M:%S")

  rowss.transpose.each_with_index {|rows, i|
    #puts "i: #{i}"
    max     = rows.flatten.compact.max

    u0 = (max / @height)
    ex0 = (Math.log(u0) / Math.log(10)).floor
    unit = (u0 / 8 / (10**(ex0-1))).ceil * (10**(ex0-1))

    max_val = unit*@height
    #max_val = max
    #unit    = max_val / (@height * 8).to_f

    puts "    #{(url)}"
    puts "    #{s} -"
    puts "  #{meta['legend'][i].center(78)}"
    render_graph rows, unit
    render_x_axis_labels(rows, start_timestamp, step)
    puts ""

    #sums = summary.first.last
    #puts "    #{sprintf("cur: %.1f  ave: %.1f  max: %.1f  min %.1f", *sums)}"
  }
end

#render_graph(rows, unit) ⇒ Object 



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# File 'lib/gri/sgraph.rb', line 64

def render_graph rows, unit
  result = []

  rows.map{|row|
    bar(row, unit, @options[:non_fullwidth_font])
  }.transpose.reverse.each_with_index do |row, i|
    i = (@height- i)
    if i.even?
      n = unit * i * 8
      if n > 10
        label = sprintf("%6s", to_scalestr(unit * i * 8))
      else
        label = sprintf("%6g", unit * i * 8)
      end
    else
      label = ''
    end
    line = row.join
    if color = @options[:color]
      line = Term::ANSIColor.send(color, line)
    end
    result << "#{sprintf('%6s', label)}|#{line}|"
  end
  puts result.join("\n")
end

#render_x_axis_labels(rows, start_timestamp, step) ⇒ Object 



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# File 'lib/gri/sgraph.rb', line 108

def render_x_axis_labels(rows, start_timestamp, step)
  tm = rows.size * step

  x_axis_labels = rows.length.times.select{|n| n % 8 == 0}. map{|n|
    t = Time.at(start_timestamp + (n * step)).localtime
    sprintf("%-8s", to_axis_label(t, tm))
  }.join
  x_axis_arrows= rows.length.times.select{|n| n % 8 == 0}. map{|n|
    " /      "
  }.join

  case 'show'#@options[:x_axis_label]
  when "show"
    puts sprintf("%6s%s", "", x_axis_arrows)
    puts sprintf("%6s%s", "", x_axis_labels)
  when "simple"
    puts sprintf("%6s%s", "", x_axis_labels)
  end
end

#to_axis_label(t, tm) ⇒ Object 



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# File 'lib/gri/sgraph.rb', line 128

def to_axis_label t, tm
  f = if tm <= 3600
        '%M'
      elsif tm <= 48*3600
        '%H:%M'
      elsif tm <= 8*24*3600
        '%a'
      elsif tm <= 35*24*3600
        '%d'
      else
        '%m'
      end
  t.strftime f
end

#to_scalestr(v, base = 1000) ⇒ Object 



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# File 'lib/gri/sgraph.rb', line 90

def to_scalestr v, base=1000
  if v == nil or base == nil or base == 0
    return(v.to_i == v ? v.to_i : v)
  end
  v = v.to_f
  if v >= base ** 4
    "%gT" % (v / (base ** 4))
  elsif v >= base ** 3
    "%gG" % (v / (base ** 3))
  elsif v >= base ** 2
    "%gM" % (v / (base ** 2))
  elsif v >= base
    "%gK" % (v / base)
  else
    v.to_s
  end
end