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#-*- coding: utf-8 -*-
# graph
# draw graph
require_if_exist 'rubygems'
require_if_exist 'gruff'
module Graph
def self.graph_drawable?
return defined?(Gruff)
end
# values = {records=>[points(Numeric)]}
# options = {
# :title => 'graph title'
# :tags => ['hash tags']
# :label => ['label of column']
# :start => 'label of start'
# :end => 'label of end'
# }
def self.drawgraph(values, options)
notice 'graph: '+options.inspect
if(self.graph_drawable?) then
graph = Gruff::Line.new
length = 0
values.each{ |key, ary|
graph.data(key, ary)
length = [length, ary.size].max
}
if(options[:label].is_a? Proc) then
label = options[:label].call(:get).freeze
else
label = (options[:label] || Hash.new).freeze
end
if (not options[:end]) then
options[:end] = Time.now
end
notice 'graph: '+label.inspect
graph.labels = label
graph.title = options[:title] + '(' + options[:start].strftime('%Y/%m/%d') + ')'
tmpfile = Tempfile.open('graph')
tmpfile.write(graph.to_blob)
result = {
:message => "#{options[:start].strftime('%Y/%m/%d %H:%M')}から#{options[:end].strftime('%m/%d %H:%M')}の#{options[:title]}のグラフ",
:tags => options[:tags],
:image => Message::Image.new(tmpfile.path)}
tmpfile.close
result
else
table = values.values.flatten
{ :message => "#{options[:start].strftime('%Y/%m/%d %H:%M')}から#{options[:end].strftime('%m/%d %H:%M')}の#{options[:title]}は、最高#{table.max}、最低#{table.min}、平均#{table.avg.round_at(4)}です。",
:tags => options[:tags]} end end
# return graph label generator.
def self.gen_graph_label_defer(default={0 => Time.now.strftime('%H')})
last_sample_time = Time.now
temp_label = default
count = 0
lambda{ |value|
if(value == :get) then
return temp_label
elsif(value != nil) then
temp_label[count] = value
elsif(last_sample_time.strftime('%H') != Time.now.strftime('%H')) then
temp_label[count] = Time.now.strftime('%H')
last_sample_time = Time.now
else
end
count += 1
temp_label
}
end
end
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