Adding mac history graph

app/controllers/application_controller.rb

@@ -13,3 +13,11 @@ class ApplicationController < ActionController::Base
   @payment_methods = [[nil],["PayPal"],["Dwolla"],["Bill Pay"],["Check"],["Cash"],["Other"]]
   @payment_instructions = {nil => nil, :paypal => "Set up a monthly recurring payment to hslfinances@gmail.com", :dwolla => "Set up a monthly recurring payment to hslfinances@gmail.com", :billpay =>  "Have your bank send a monthly check to HeatSync Labs Treasurer, 140 W Main St, Mesa AZ 85201", :check => "Mail to HeatSync Labs Treasurer, 140 W Main St, Mesa AZ 85201 OR put in the drop safe at the Lab with a deposit slip firmly attached each month.", :cash => "Put in the drop safe at the Lab with a deposit slip firmly attached each month.", :other => "Hmm... talk to a Treasurer!"}
 end
+
+# Add a "fit" function to sanitize inputs for mac history
+class Fixnum
+  def fit(range)
+    self > range.max ? range.max : (self < range.min ? range.min : self)
+  end
+end
+

app/controllers/macs_controller.rb

@@ -1,5 +1,5 @@
 class MacsController < ApplicationController
-load_and_authorize_resource :mac, :except => :create
+load_and_authorize_resource :mac, :except => [:create, :history]
 #load_and_authorize_resource :user, :through => :mac, :except => [:index, :show, :scan, :import]
 
 before_filter :arp_lookup, :only => :new
@@ -86,6 +86,47 @@ def index
   end
 end
 
+  def history
+    authorize! :read_details, Mac
+    begin
+      @start_date = DateTime.parse(params[:start])
+      @end_date = DateTime.parse(params[:end])
+    rescue
+      @start_date = DateTime.now - 2.weeks
+      @end_date = DateTime.now
+    end
+
+    @mac_logs_by_hour = MacLog.where("created_at > ? AND created_at < ?", @start_date, @end_date).group_by{|m| m.created_at.beginning_of_hour}
+    @mac_log_graph = []
+    mac_running_balance = 0
+    lowest_balance = 0
+    @mac_logs_by_hour.each do |time, mac_log|
+      mac_log.each do |entry|
+        # Add one computer for activate, subtract one for deactivate
+        if entry.action == "activate"
+          mac_running_balance += 1
+        elsif entry.action == "deactivate"
+          mac_running_balance -= 1
+        end
+        # Keep track of the lowest number in the graph
+        if mac_running_balance < lowest_balance
+          lowest_balance = mac_running_balance
+        end
+      end
+      @mac_log_graph << [time.to_time.to_i*1000,mac_running_balance]
+    end
+
+    if lowest_balance != 0
+      # Subtract a negative balance to raise everything
+      @mac_log_graph = @mac_log_graph.map{ |time,balance| [time, balance - lowest_balance] }
+    end
+
+    respond_to do |format|
+      format.html
+      format.json { render :json => @mac_log_graph }
+    end
+  end
+
   # GET /macs/1
   # GET /macs/1.json
   def show

app/views/macs/history.html.erb

@@ -0,0 +1,112 @@
+<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
+<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />
+<script src="http://code.highcharts.com/highcharts.js"></script>
+<script type="text/javascript">
+graph_data = <%= raw @mac_log_graph.to_json %>;
+plot_band_start_hour = 16;
+plot_band_end_hour = 22;
+
+$(function() {
+
+  $('#graph').highcharts({
+      chart: {
+        type: 'column',
+        zoomType : 'x'   
+      },
+      colors: [
+        '#2980B9'
+      ],
+      title: { 
+        style : { fontSize: '10px' },
+        text: "Click and Drag to Zoom." 
+      },
+      xAxis: {
+        title : { text : "Days" },
+        type : 'datetime',
+        plotBands: generatePlotBands(graph_data[0][0], graph_data[graph_data.length-1][0]),
+        labels : { align : "left" }
+      },
+      yAxis : {
+        title : {
+          text : "# of Computers"
+        }
+      },
+      series: [
+      {
+        name: "Computers",
+        data: graph_data
+      },
+      ],
+      plotOptions: {
+        spline: {
+          lineWidth: 4,
+          marker: {
+            enabled: false
+          },
+          pointInterval: 3600000, // one hour
+        }
+     }
+  });
+    
+   Highcharts.setOptions({
+     global : {
+       useUTC : false
+     }
+   });
+});
+
+function generatePlotBands(start,end){
+  plotBands = new Array();
+  for (var d = new Date(start); d <= end; d.setDate(d.getDate() + 1)) {
+    // weekends
+    if(d.getDay()%6==0){
+      // highlight the whole day
+      plotBands.push({
+        color: '#eee',
+        from: d.setHours(0),
+        to: d.setHours(23)
+      });
+      // weekend hours
+      plotBands.push({
+        color: '#94C9EC',
+        from: d.setHours(12),
+        to: d.setHours(18)
+      });
+    }
+    else if(d.getDay()==3){
+      // special wednesday hours
+      plotBands.push({
+        color: '#94C9EC',
+        from: d.setHours(12),
+        to: d.setHours(plot_band_end_hour)
+      });
+    }
+    else {
+      // open hours
+      plotBands.push({
+        color: '#82DAC9',
+        from: d.setHours(plot_band_start_hour),
+        to: d.setHours(plot_band_end_hour)
+      });
+    }
+  }
+  return plotBands;
+}
+</script>
+
+
+<h2>Daily Computer Graph</h2>
+<p><em>Note: these numbers are not absolute. They are calculated and adjusted on-the-fly and thus may vary depending on the query parameters.</em></p>
+<%= link_to 'Back to Computers', macs_path, :class => 'btn' %>
+<%= link_to 'Download JSON', macs_history_path+".json", :class => 'btn' %>
+<div id="graph" title="MAC Presence by Day" style="height: 400px; width: 100%;"></div>
+
+<%= form_tag(nil, :method => :get) do %>
+  <label>Start Date
+    <input id="start" name="start" type="date" value="<%= @start_date.to_date.to_s %>" />
+  </label>
+  <label>End Date
+    <input id="end" name="end" type="date" value="<%= @end_date.to_date.to_s %>" />
+  </label>
+  <%= submit_tag("Change Date", :name => nil, :class => 'btn') %>
+<% end %>

app/views/macs/index.html.erb

@@ -17,7 +17,8 @@
 <% end %>
 
 <h2>What machines are on our network?</h2>
-<%= link_to "New MAC registration", new_mac_path if can? :create, Mac %>
+<%= link_to "New MAC registration", new_mac_path, :class => 'btn' if can? :create, Mac %>
+<%= link_to 'Activity Graph', macs_history_path, :class => 'btn' if can? :read_details, Mac %>
 
 <ul class="mac_list">
 <%