Merge pull request #296 from Shopify/updating_gems_and_refactoring

Updating gems and refactoring

3 files changed, 294 insertions, 0 deletions

diff --git a/lib/dashing/app.rb b/lib/dashing/app.rb
new file mode 100644
index 0000000..033849c
--- /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
+
+def development?
+  ENV['RACK_ENV'] == 'development'
+end
+
+def production?
+  ENV['RACK_ENV'] == 'production'
+end
+
+helpers Sinatra::ContentFor
+helpers do
+  def protected!
+    # override with auth logic
+  end
+end
+
+set :root, Dir.pwd
+set :sprockets,     Sprockets::Environment.new(settings.root)
+set :assets_prefix, '/assets'
+set :digest_assets, false
+set server: 'thin', connections: [], history_file: 'history.yml'
+set :public_folder, File.join(settings.root, 'public')
+set :views, File.join(settings.root, 'dashboards')
+set :default_dashboard, nil
+set :auth_token, nil
+
+if File.exists?(settings.history_file)
+  set history: YAML.load_file(settings.history_file)
+else
+  set history: {}
+end
+
+%w(javascripts stylesheets fonts images).each do |path|
+  settings.sprockets.append_path("assets/#{path}")
+end
+
+['widgets', File.expand_path('../../../javascripts', __FILE__)]. each do |path|
+  settings.sprockets.append_path(path)
+end
+
+not_found do
+  send_file File.join(settings.public_folder, '404.html')
+end
+
+at_exit do
+  File.write(settings.history_file, settings.history.to_yaml)
+end
+
+get '/' do
+  protected!
+  dashboard = settings.default_dashboard || first_dashboard
+  raise Exception.new('There are no dashboards available') if not dashboard
+
+  redirect "/" + dashboard
+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 '/: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
+
+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
+
+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
+
+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
+
+def require_glob(relative_glob)
+  Dir[File.join(settings.root, relative_glob)].each do |file|
+    require file
+  end
+end
+
+settings_file = File.join(settings.root, 'config/settings.rb')
+require settings_file if File.exists?(settings_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'
+require_glob(File.join('lib', '**', '*.rb'))
+require_glob(File.join(job_path, '**', '*.rb'))
diff --git a/lib/dashing/cli.rb b/lib/dashing/cli.rb
new file mode 100644
index 0000000..27d8f6b
--- /dev/null
+++ b/lib/dashing/cli.rb
@@ -0,0 +1,109 @@
+require 'thor'
+require 'open-uri'
+
+module Dashing
+  class CLI < Thor
+    include Thor::Actions
+
+    attr_reader :name
+
+    class << self
+      attr_accessor :auth_token
+
+      def hyphenate(str)
+        return str.downcase if str =~ /^[A-Z-]+$/
+        str.gsub('_', '-').gsub(/\B[A-Z]/, '-\&').squeeze('-').downcase
+      end
+    end
+
+    no_tasks do
+      %w(widget dashboard job).each do |type|
+        define_method "generate_#{type}" do |name|
+          @name = Thor::Util.snake_case(name)
+          directory(type.to_sym, "#{type}s")
+        end
+      end
+    end
+
+    desc "new PROJECT_NAME", "Sets up ALL THE THINGS needed for your dashboard project."
+    def new(name)
+      @name = Thor::Util.snake_case(name)
+      directory(:project, @name)
+    end
+
+    desc "generate (widget/dashboard/job) NAME", "Creates a new widget, dashboard, or job."
+    def generate(type, name)
+      public_send("generate_#{type}".to_sym, name)
+    rescue NoMethodError => e
+      puts "Invalid generator. Either use widget, dashboard, or job"
+    end
+
+    desc "install GIST_ID", "Installs a new widget from a gist."
+    def install(gist_id)
+      gist = Downloader.get_gist(gist_id)
+      public_url = "https://gist.github.com/#{gist_id}"
+
+      install_widget_from_gist(gist)
+
+      print set_color("Don't forget to edit the ", :yellow)
+      print set_color("Gemfile ", :yellow, :bold)
+      print set_color("and run ", :yellow)
+      print set_color("bundle install ", :yellow, :bold)
+      say set_color("if needed. More information for this widget can be found at #{public_url}", :yellow)
+    rescue OpenURI::HTTPError => http_error
+      say set_color("Could not find gist at #{public_url}"), :red
+    end
+
+    desc "start", "Starts the server in style!"
+    method_option :job_path, :desc => "Specify the directory where jobs are stored"
+    def start(*args)
+      port_option = args.include?('-p') ? '' : ' -p 3030'
+      args = args.join(' ')
+      command = "bundle exec thin -R config.ru start#{port_option} #{args}"
+      command.prepend "export JOB_PATH=#{options[:job_path]}; " if options[:job_path]
+      run_command(command)
+    end
+
+    desc "stop", "Stops the thin server"
+    def stop
+      command = "bundle exec thin stop"
+      run_command(command)
+    end
+
+    desc "job JOB_NAME AUTH_TOKEN(optional)", "Runs the specified job. Make sure to supply your auth token if you have one set."
+    def job(name, auth_token = "")
+      Dir[File.join(Dir.pwd, 'lib/**/*.rb')].each {|file| require_file(file) }
+      self.class.auth_token = auth_token
+      f = File.join(Dir.pwd, "jobs", "#{name}.rb")
+      require_file(f)
+    end
+
+    # map some commands
+    map 'g' => :generate
+    map 'i' => :install
+    map 's' => :start
+
+    private
+
+    def run_command(command)
+      system(command)
+    end
+
+    def install_widget_from_gist(gist)
+      gist['files'].each do |file, details|
+        if file =~ /\.(html|coffee|scss)\z/
+          widget_name = File.basename(file, '.*')
+          new_path = File.join(Dir.pwd, 'widgets', widget_name, file)
+          create_file(new_path, details['content'])
+        elsif file.end_with?('.rb')
+          new_path = File.join(Dir.pwd, 'jobs', file)
+          create_file(new_path, details['content'])
+        end
+      end
+    end
+
+    def require_file(file)
+      require file
+    end
+  end
+end
diff --git a/lib/dashing/downloader.rb b/lib/dashing/downloader.rb
new file mode 100644
index 0000000..140e862
--- /dev/null
+++ b/lib/dashing/downloader.rb
@@ -0,0 +1,18 @@
+require 'net/http'
+require 'open-uri'
+require 'json'
+
+module Dashing
+  module Downloader
+    extend self
+
+    def get_gist(gist_id)
+      get_json("https://api.github.com/gists/#{gist_id}")
+    end
+
+    def get_json(url)
+      response = open(url).read
+      JSON.parse(response)
+    end
+  end
+end