1 files changed, 167 insertions, 0 deletions
diff --git a/lib/dashing/app.rb b/lib/dashing/app.rb
new file mode 100644
index 0000000..7c4f25a
--- /dev/null
+++ b/lib/dashing/app.rb
@@ -0,0 +1,167 @@
+require 'sinatra'
+require 'sprockets'
+require 'sinatra/content_for'
+require 'rufus/scheduler'
+require 'coffee-script'
+require 'sass'
+require 'json'
+require 'yaml'
+
+SCHEDULER = Rufus::Scheduler.new
+
+set :root, Dir.pwd
+
+set :sprockets,     Sprockets::Environment.new(settings.root)
+set :assets_prefix, '/assets'
+set :digest_assets, false
+['assets/javascripts', 'assets/stylesheets', 'assets/fonts', 'assets/images', 'widgets', File.expand_path('../../javascripts', __FILE__)]. each do |path|
+  settings.sprockets.append_path path
+end
+
+set server: 'thin', connections: [], history_file: 'history.yml'
+
+# Persist history in tmp file at exit
+at_exit do
+  File.open(settings.history_file, 'w') do |f|
+    f.puts settings.history.to_yaml
+  end
+end
+
+if File.exists?(settings.history_file)
+  set history: YAML.load_file(settings.history_file)
+else
+  set history: {}
+end
+
+set :public_folder, File.join(settings.root, 'public')
+set :views, File.join(settings.root, 'dashboards')
+set :default_dashboard, nil
+set :auth_token, nil
+
+helpers Sinatra::ContentFor
+helpers do
+  def protected!
+    # override with auth logic
+  end
+end
+
+get '/events', provides: 'text/event-stream' do
+  protected!
+  response.headers['X-Accel-Buffering'] = 'no' # Disable buffering for nginx
+  stream :keep_open do |out|
+    settings.connections << out
+    out << latest_events
+    out.callback { settings.connections.delete(out) }
+  end
+end
+
+get '/' do
+  protected!
+  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
+  protected!
+  tilt_html_engines.each do |suffix, _|
+    file = File.join(settings.views, "#{params[:dashboard]}.#{suffix}")
+    return render(suffix.to_sym, params[:dashboard].to_sym) if File.exist? file
+  end
+
+  halt 404
+end
+
+get '/views/:widget?.html' do
+  protected!
+  tilt_html_engines.each do |suffix, engines|
+    file = File.join(settings.root, "widgets", params[:widget], "#{params[:widget]}.#{suffix}")
+    return engines.first.new(file).render if File.exist? file
+  end
+end
+
+post '/dashboards/:id' do
+  request.body.rewind
+  body = JSON.parse(request.body.read)
+  body['dashboard'] ||= params['id']
+  auth_token = body.delete("auth_token")
+  if !settings.auth_token || settings.auth_token == auth_token
+    send_event(params['id'], body, 'dashboards')
+    204 # response without entity body
+  else
+    status 401
+    "Invalid API key\n"
+  end
+end
+
+post '/widgets/:id' do
+  request.body.rewind
+  body = JSON.parse(request.body.read)
+  auth_token = body.delete("auth_token")
+  if !settings.auth_token || settings.auth_token == auth_token
+    send_event(params['id'], body)
+    204 # response without entity body
+  else
+    status 401
+    "Invalid API key\n"
+  end
+end
+
+not_found do
+  send_file File.join(settings.public_folder, '404.html')
+end
+
+def development?
+  ENV['RACK_ENV'] == 'development'
+end
+
+def production?
+  ENV['RACK_ENV'] == 'production'
+end
+
+def send_event(id, body, target=nil)
+  body[:id] = id
+  body[:updatedAt] ||= Time.now.to_i
+  event = format_event(body.to_json, target)
+  Sinatra::Application.settings.history[id] = event unless target == 'dashboards'
+  Sinatra::Application.settings.connections.each { |out| out << event }
+end
+
+def format_event(body, name=nil)
+  str = ""
+  str << "event: #{name}\n" if name
+  str << "data: #{body}\n\n"
+end
+
+def latest_events
+  settings.history.inject("") do |str, (id, body)|
+    str << body
+  end
+end
+
+def first_dashboard
+  files = Dir[File.join(settings.views, '*')].collect { |f| File.basename(f, '.*') }
+  files -= ['layout']
+  files.sort.first
+end
+
+def tilt_html_engines
+  Tilt.mappings.select do |_, engines|
+    default_mime_type = engines.first.default_mime_type
+    default_mime_type.nil? || default_mime_type == 'text/html'
+  end
+end
+
+settings_file = File.join(settings.root, 'config/settings.rb')
+if (File.exists?(settings_file))
+  require settings_file
+end
+
+Dir[File.join(settings.root, 'lib', '**', '*.rb')].each {|file| require file }
+{}.to_json # Forces your json codec to initialize (in the event that it is lazily loaded). Does this before job threads start.
+
+job_path = ENV["JOB_PATH"] || 'jobs'
+files = Dir[File.join(settings.root, job_path, '**', '/*.rb')]
+files.each { |job| require(job) }