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Better Session Script

Posted on Wednesday, May 27, 2009 by android apps market for tablests

Ryan McCuaig sent me a kick-ass re-write of my WWDC session script. This one outputs the information with much, much better formatting.

Here's the very fine script:

#!/usr/bin/env ruby
#
# This program will download the latest session JSON data 
# from the WWDC website and will parse it into a plain 
# HTML table so it can be viewed.
#
# Requires one of the following two gems to be installed:
#
#   gem install json
#   gem install json_pure
#
# Also requires installation of Haml/Sass:
#
#   gem install haml
#
# This script was written by Ryan McCuaig, based on a script by Jeff LaMarche

require 'net/http'
require 'open-uri'
require 'rubygems'
require 'json'
require 'haml'
require 'sass'

JSON_FEED = 'http://developer.apple.com/wwdc/data/sessions.json'

class Session
  attr_accessor :title,:focus,:start,:description,:type,:identifier, :room
  def initialize(array)
    @title = array["title"]
    @focus = array["focus"]
    @type = array["type"]
    @start = Time.parse(array["time"][0]["lower"])
    @stop = Time.parse(array["time"][0]["upper"])
    @description = array["description"]
    @identifier = array["id"]
    @room = array["room"]
  end
  def when
    start = @start.strftime("%l:%M %p")
    stop = @stop.strftime("%l:%M %p")
    [start,stop].map{|x| x.strip}.join("-")
  end
end

json_data = open(JSON_FEED).read
parsed_data = JSON.parse(json_data)["SessionsData"]

sessions = []
parsed_data.each do |array|
  sessions << Session.new(array)
end
sessions.sort! {|x,y| x.start <=> y.start}

class Array
  # group_by doesn't exist before Ruby 1.8.7, drat
  def group_by
    hash = {}
    each do |element|
      key = yield(element)
      if hash.has_key?(key)
        hash[key] << element
      else
        hash[key] = [element]
      end
    end
    hash
  end unless [].respond_to?(:group_by)
end

sessions_grouped_by_day = sessions.group_by {|x| x.start.strftime("%A")}

html_template = <<HTML
!!!
%html
  %head
    %title Session Times
    %style= css
  %body
    %div#content
      - %w{Monday Tuesday Wednesday Thursday Friday}.each do |day|
        %h1= day
        - days[day].each do |session|
          %h2
            %div#when= session.when
            %div
              = session.title
              %span.type= session.type
              %span.focus= session.focus.join(", ")
              %span.identifier= session.identifier
              %span.room= session.room
          %p= session.description
HTML

css_template = <<CSS
!indent = 150px
#content
  :width 800px
  :margin-left auto
  :margin-right auto
h1,
h2,
p
  :font-family Helvetica Neue, Helvetica
h1
  :font-size 21px
h2
  :font-size 16px
  :margin-left 0px
  div#when
    :position relative
    :bottom -3px
    :width = !indent
    :float left
    :font
      :weight normal
      :size 13px
  span
    :font
      :weight normal
      :size 13px
    :padding 0 0.5em 0 0.5em
    &.type
      :color red
    &.focus
      :color green
    &.identifier
      :color blue
    &.room
      :font
        :weight bold
        :size 14px
      :color grey
      
p
  :font-size 13px
  :line-height 21px
  :margin-left = !indent
CSS

html_engine = Haml::Engine.new(html_template)
css_engine = Sass::Engine.new(css_template)

File.open("/tmp/wwdc_sessions.html",'w') do |file|
  file.write html_engine.render(Object.new,
    :days=>sessions_grouped_by_day,:css=>css_engine.render)
end
`open /tmp/wwdc_sessions.html`

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