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require 'sinatra'
require 'sinatra/content_for'
require 'rufus/scheduler'
require 'coffee-script'
require 'sass'
require 'json'
Dir[File.join(Dir.pwd, 'lib/**/*.rb')].each {|file| require file }
SCHEDULER = Rufus::Scheduler.start_new
set server: 'thin', connections: [], history: {}
helpers Sinatra::ContentFor
def configure(&block)
set :public_folder, Dir.pwd + '/public'
set :views, Dir.pwd + '/dashboards'
set :default_dashboard, nil
instance_eval(&block)
end
get '/events', provides: 'text/event-stream' do
stream :keep_open do |out|
settings.connections << out
out << latest_events
out.callback { settings.connections.delete(out) }
end
end
get '/' do
begin
redirect "/" + (settings.default_dashboard || first_dashboard).to_s
rescue NoMethodError => e
raise Exception.new("There are no dashboards in your dashboard directory.")
end
end
get '/:dashboard' do
erb params[:dashboard].to_sym
end
get '/views/:widget?.html' do
widget = params[:widget]
send_file File.join(Dir.pwd, "widgets/#{widget}/#{widget}.html")
end
post '/widgets/:id' do
request.body.rewind
body = JSON.parse(request.body.read)
auth_token = body.delete("auth_token")
if auth_token == settings.auth_token
send_event(params['id'], body)
204 # response without entity body
else
status 401
"Invalid API key\n"
end
end
def framework_javascripts
['jquery.js', 'es5-shim.js', 'batman.js', 'batman.jquery.js', 'application.coffee', 'widget.coffee'].collect do |f|
File.join(File.expand_path("../../vendor/javascripts", __FILE__), f)
end
end
def widget_javascripts
asset_paths("/widgets/**/*.coffee")
end
def javascripts
(framework_javascripts + widget_javascripts).collect do |f|
if File.extname(f) == ".coffee"
begin
CoffeeScript.compile(File.read(f))
rescue ExecJS::ProgramError => e
message = e.message + ": in #{f}"
raise ExecJS::ProgramError.new(message)
end
else
File.read(f)
end
end.join("\n")
end
def stylesheets
asset_paths("/public/**/*.scss", "/widgets/**/*.scss").collect do |f|
Sass.compile File.read(f)
end.join("\n")
end
def asset_paths(*paths)
paths.inject([]) { |arr, path| arr + Dir[File.join(Dir.pwd, path)] }
end
def send_event(id, body)
body["id"] = id
event = format_event(JSON.unparse(body))
settings.history[id] = event
settings.connections.each { |out| out << event }
end
def format_event(body)
"data: #{body}\n\n"
end
def latest_events
settings.history.inject("") do |str, (id, body)|
str << body
end
end
def first_dashboard
files = Dir[settings.views + "/*.erb"].collect { |f| f.match(/(\w*).erb/)[1] }
files -= ['layout']
files.first
end
files = Dir[Dir.pwd + '/jobs/*.rb']
files.each { |job| require(job) }
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