Download the swipes and flex dollars left on your SMU ID card.

smu_swipes.rb

#!/usr/bin/env ruby

# Author: Christian Genco (@cgenco)
# 2013-09-04

SMU_ID = "SMU STUDENT ID GOES HERE"
SMU_PW = "SMU PASSWORD GOES HERE"

require 'time'
@logfilename = "/Users/cgenco/Dropbox/flex.log"
@graphfilename = "/tmp/flex_graph.html"

require 'hpricot'
require 'rest_client'

def put(str); STDERR.puts str; end

@env = {"User-Agent"=>"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_2) AppleWebKit/537.17 (KHTML, like Gecko) Chrome/24.0.1312.56 Safari/537.17"}

params = {'user' => SMU_ID,'pass' => SMU_PW}

url = "https://webcardcenter.smu.edu/student/local_login.php"

# put "Getting session id"
res = RestClient.get(url, @env)
@cookies = {:cookies => res.cookies}
res.body =~ /var __sesstok = '(.*)';/
params['__sesstok'] = $1

# define "get" and "post" with the cookies
def get(url)
  RestClient.get(url, @env.merge(@cookies)).body
end

def post(url, params)
  RestClient.post(url, params, @env.merge(@cookies)){ |response, request, result, &block|
    if [301, 302, 307].include? response.code
      # follow redirects
      response.follow_redirection(request, result, &block)
    else
      response.return!(request, result, &block)
    end
  }.body
end

# fun time
put "Logging in and getting data"

page = Hpricot(post(url, params))
page_text = page.inner_text

# get rid of pony
page_text["$0.00"] = ""

# when you have a problem, use regex
page_text =~ /\$(\d+\.\d{2})/
flex = $1.to_f

# then you will have two problems
page_text =~ /Block 40\s+(\d+)/
swipes = $1.to_i

graduation = Time.parse("May 19, 2013")
days = (graduation - Time.now)/(60*60*24)

# subtract spring break
spring_break_end = Time.parse("March 9, 2013")
if Time.now < spring_break_end
  # put "before spring break"
  days -= 9
end

puts "#{days.round(1)} days, $#{flex} flex and #{swipes} swipes left."

flex_per_day = (flex/days).round(2)
swipes_per_day = (swipes/days).round(1)

puts "That's $#{flex_per_day} flex and #{swipes_per_day} swipes per day."

put "Logout" # trying to be responsible :D
get("https://webcardcenter.smu.edu/logout.php?dir=&logout=1")

# loggin' time

require 'logger'
Logger.new(@logfilename).info("#{days.round(2)}, #{flex}, #{swipes}")

exit

#make graph!

# parse the data from the logfile
data = File.open(@logfilename).map{|line|
  if line =~ /^[^\[]+\[([^\]]*)[^\:]+\: ([0-9\,\.]+)[^\(]+\(([0-9\,\.]+)/
    time, total, per_day = $1, $2, $3
    total = total.to_s.gsub(',','')
    per_day = per_day.to_s.gsub(',','')
    {
      # Date.UTC(year,month,day,hours,minutes,seconds,millisec)
      :time => Time.parse(time).strftime("Date.UTC(%Y,%-m-1,%-d,%-k,%-M,%-S)"),
      :total => total,
      :per_day => per_day
    }
  end
}.compact

data.map!{|h|
  if h[:per_day].to_i > 5_000
    h[:per_day] = 5_000.to_s
  end
  h
}

def make_chart(params = {})
  params[:id] ||= 'chart'
  params[:title] ||= 'My Chart'
  params[:series_title] ||= 'My Series'
  params[:y_axis] ||= 'y'
  params[:data] ||= []

  html=<<-END
    <div id="#{params[:id]}" style="min-width: 400px; height: 400px; margin: 0 auto"></div>
    <script>
    $(function () {
        var chart;
        $(document).ready(function() {
            chart = new Highcharts.Chart({
                chart: {
                    renderTo: '#{params[:id]}',
                    type: 'spline'
                },
                title: {
                    text: '#{params[:title]}'
                },
                xAxis: {
                    type: 'datetime',
                    dateTimeLabelFormats: { // don't display the dummy year
                        month: '%e. %b',
                        year: '%b'
                    }
                },
                yAxis: {
                    title: {
                        text: '#{params[:y_axis]}'
                    },
                    min: 0
                },
                tooltip: {
                    formatter: function() {
                            return '<b>'+ this.series.name +'</b><br/>'+
                            Highcharts.dateFormat('%e. %b', this.x) +': '+ this.y +' m';
                    }
                },
                
                series: [{
                    name: '#{params[:series_title]}',
                    data: [
                        [#{params[:data].map{|d| d[0] + ',' + d[1]}.join("],\n[")}]
                    ]
                }]
            });
        }); 
    });
    </script>
  END
end

html=<<-END
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script>google.load("jquery", "1.7.1");</script>
<script src="http://code.highcharts.com/highcharts.js"></script>
<script src="http://code.highcharts.com/modules/exporting.js"></script>
#{make_chart(:id => 'average_use', :title => 'Internet Usage', :series_title => 'Average MB/day', :y_axis => 'MB/day', :data => data.map{|d| [d[:time], d[:per_day]]})}

#{make_chart(:id => 'total_use', :title => 'Total Internet Available', :series_title => 'Total MB', :y_axis => 'MB', :data => data.map{|d| [d[:time], d[:total]]})}

END
File.open(@graphfilename , 'w'){|f| f.puts html}

# , {
#                   name: 'Total MB',
#                   data: [
#                     [#{data.map{|d| d[:time] + ',' + d[:total]}.join("],\n[")}]
#                   ]
#               }


`open /tmp/internet_graph.html` if ARGV.index("graph")