isurvey.rb

# isurvey simple server

require 'rubygems'
require 'sinatra'
require 'activerecord'

configure do
  ActiveRecord::Base.establish_connection(
    :adapter => 'sqlite3',
    :database => 'isurvey.sqlite3')
  
  begin
    ActiveRecord::Schema.define do
      create_table :answers do |t|
        t.text :name, :null => false
        t.text :answer
        t.timestamps
      end
    end
  rescue ActiveRecord::StatementInvalid
    # Do nothing, since the schema already exists
  end
end

class Answer < ActiveRecord::Base  
  named_scope :recent, {:limit => 10, :order => 'updated_at DESC'}
end

before do
  content_type "text/json"
end

get '/counter' do
  {:counter => '2856',
   :top_country => "USA",
   :top_sex => "Male",
   :top_gadget => "iPhone 3G" }.to_json
end

get '/surveys' do
  {:surveys => ['Do you like Obama?']}.to_json
end

post '/answers' do
  answer = Answer.new
  answer.from_json(request.body.string)
  
  if answer.save
    status(201)
    response['Number'] = answer.id.to_s
    
    "Created answer #{answer.id} with text \"#{answer.name}\"\n"
  else
    status(412)
    #response['Error'] = answer.errors.to_json
    "Error: Cannot save answer\n"
  end  
end

get '/answers' do
  answers = Answer.recent.all
  answers.to_json
end

error ActiveRecord::RecordNotFound do
  status(404)
  @msg = "Answer not found\n"
end

not_found do
  status(404)
  @msg || "iSurvey doesn't know about that!\n"
end