Dynamically creating dashing.io dashboards

environment.erb

<%
require 'rubygems'
require 'json'

class Widget
  def initialize(id,title,view,order)
    @widget_id = id
    @widget_view = view
    @widget_title = title
    @widget_order = order
  end
  def view
    @widget_view
  end
  def title
    @widget_title
  end
  def order
    @widget_order.to_i
  end
  def id
    @widget_id
  end
  def print
    return "{" + @widget_id.to_s + "," + @widget_title.to_s + "," + @widget_view.to_s + "," + @widget_order.to_s + "}"
  end
  
end

  env = File.basename(__FILE__, File.extname(__FILE__)) 
  skynet = `/opt/skynet/skynet.py -a vms #{env.to_s}`
  parsed = JSON.parse(skynet) 
  row = 0
  vms = Hash.new
  
  parsed['vms'].each do |key|
    vms[key["id"]] = key["runstate"]
  end
%>

<script type='text/javascript'>
$(function() {
  // These settings override the defaults set in application.coffee. You can do this on a per dashboard basis.
  
  Dashing.widget_base_dimensions = [200, 250]
  Dashing.widget_margins = [5, 5]
  Dashing.numColumns = 6
  });
</script>

<% content_for :title do %>Sktap Environmet: <%= env %><% end %>
<div class="gridster">
  <ul>

<%
vms.each do |vm, runstate|
  row = row + 1
if runstate != "running"
%>
    <li data-row="<%=row%>" data-col="1" data-sizex="1" data-sizey="1">
      <div data-id="<%=vm%>-title" data-view="Textsm" data-title="Skytap VM" data-text="<%=vm%>"></div>
    </li>
    <li data-row="<%=row%>" data-col="2" data-sizex="2" data-sizey="1">
      <div data-id="<%=vm%>_suspended" data-view="Textsm" data-title="State" data-text="<%=runstate%>"></div>
    </li>

<% else 
  widgets = Sinatra::Application.settings.history
  widget_list = []
  widgets.each do |key, value|
      if key.to_s.index(vm.to_s) != nil
          view="Numbersm"
          title=""
          order_index = 1
          order = value.gsub("data: ","").split(",")          
          order.each do |o|
            set = o.split(":")
            if (set[0].to_s.index("order") != nil)
              order_index = set[1].gsub("\"","")
            end
            if (set[0].to_s.index("view") != nil)
              view = set[1].gsub("\"","")
            end
            if (set[0].to_s.index("title") != nil)
              title = set[1].gsub("\"","")
            end
          end
          item = Widget.new(key,title,view,order_index)
          widget_list.push(item)
      end #if key.index(vm) != nil
    end #widgets.each do |key, value|
    
    widget_list.sort! { |a,b| a.order <=> b.order }
    col = 0
    widget_list.each do |w|
        col = col + 1
%>
          <li data-row="<%=row%>" data-col="<%=col%>" data-sizex="1" data-sizey="1">
            <div data-id="<%=w.id%>" data-view="<%=w.view%>" ></div>
          </li>
<%
    end # widget_list.each do |w|
  end #if runstate != "running"
end #vms.each do |vm, runstate|
%>
    
  </ul>

</div>

environments.rb

# This script is the one that gets a list of all of our environments and
# creates symlinks for the appropriate <environment>.erb file from
# the template erb file in the assets/templates/ folder.

require 'rubygems'
require 'json'

def update_environments
  status = 'normal'
  service = 'Skytap'
  template = '/opt/dashboard/assets/templates/environment.erb'
  env_path = '/opt/dashboard/dashboards/'
  widget = 'skytap_environments'
  skynet = `/opt/skynet/skynet.py -a env`

  parsed = JSON.parse(skynet)
  total = 0

  parsed.each do |value|
    total += 1
    erb = env_path + value.to_s + '.erb'
    next if File.file?(erb)
    puts 'Creating template link: ' + erb.to_s
    File.symlink(template, erb)
  end
  Dir[env_path + '*.erb'].each do |f|
    next unless File.symlink?(f)
    next if parsed.include? File.basename(f, '.erb')
    puts 'Deleting template link (Environment not found): ' + f.to_s
    File.delete(f)
  end
  send_event(widget.to_s, value: total.to_i, current: total.to_i,
                          service: service, status: status)
end

update_environments

SCHEDULER.every '60m' do
  update_environments
end