modules_controller.rb
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class ModulesController < ApplicationController
# GET /modules/1/metric_history
def metric_history
module_result = ModuleResult.new({ id: params[:id] })
metric_history = module_result.metric_history(params[:metric_name]) # pending: sort this hash.
dates = Array.new
values = Array.new
metric_history.keys.each do |date|
dates.push date
values.push metric_history[date]
end
send_data(Base64.encode64(graphic_for(values, dates)), type: 'image/png', filename: "#{params[:module_id]}-#{params[:metric_name]}.png")
end
# POST /modules/1/tree
def load_module_tree
@root_module_result = ModuleResult.find(params[:id].to_i)
end
private
def graphic_for(values, dates)
graphic = Gruff::Line.new(400)
graphic.hide_title = true
graphic.hide_legend = true
graphic.theme = {
colors: ['grey'],
marker_color: 'black',
background_colors: '#fff',
}
graphic.labels = Hash[dates.each_with_index.map{ |date, index| [index, date.to_s]}]
graphic.data('Values', values)
graphic.to_blob
end
end