Module: Earthquake::Core

Included in:
Earthquake
Defined in:
lib/earthquake/core.rb

Instance Method Summary collapse

Instance Method Details

#__init(options) ⇒ Object 



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# File 'lib/earthquake/core.rb', line 113

def __init(options)
  config.merge!(options)
  _init
  _once
end

#_init ⇒ Object 



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# File 'lib/earthquake/core.rb', line 38

def _init
  load_config
  load_plugins
  inits.each { |block| class_eval(&block) }
  inits.clear
end

#_once ⇒ Object 



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# File 'lib/earthquake/core.rb', line 34

def _once
  onces.each { |block| class_eval(&block) }
end

#async(&block) ⇒ Object 



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# File 'lib/earthquake/core.rb', line 238

def async(&block)
  Thread.start do
    begin
      block.call
    rescue Exception => e
      error e
    end
  end
end

#browse(url) ⇒ Object 



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# File 'lib/earthquake/core.rb', line 261

def browse(url)
  Launchy.open(url)
end

#config ⇒ Object 



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# File 'lib/earthquake/core.rb', line 6

def config
  @config ||= {}
end

#default_config ⇒ Object 



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# File 'lib/earthquake/core.rb', line 56

def default_config
  consumer = YAML.load_file(File.expand_path('../../../consumer.yml', __FILE__))
  dir = config[:dir] || File.expand_path('~/.earthquake')
  {
    dir:             dir,
    time_format:     Time::DATE_FORMATS[:short],
    plugin_dir:      File.join(dir, 'plugin'),
    file:            File.join(dir, 'config'),
    prompt:          '⚡ ',
    consumer_key:    consumer['key'],
    consumer_secret: consumer['secret'],
    output_interval: 1,
    history_size:    1000,
    api:             { :host => 'userstream.twitter.com', :path => '/2/user.json', :ssl => true },
    confirm_type:    :y,
    expand_url:      false,
    thread_indent:   "  ",
    no_data_timeout: 30
  }
end

#error(e) ⇒ Object 



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# File 'lib/earthquake/core.rb', line 248

def error(e)
  notify "[ERROR] #{e.message}\n#{e.backtrace.join("\n")}"
end

#init(&block) ⇒ Object 



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# File 'lib/earthquake/core.rb', line 22

def init(&block)
  inits << block
end

#inits ⇒ Object 



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# File 'lib/earthquake/core.rb', line 18

def inits
  @inits ||= []
end

#invoke(command, options = {}) ⇒ Object 



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# File 'lib/earthquake/core.rb', line 119

def invoke(command, options = {})
  __init(options)
  input(command)
end

#item_queue ⇒ Object 



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# File 'lib/earthquake/core.rb', line 14

def item_queue
  @item_queue ||= []
end

#load_config ⇒ Object 



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# File 'lib/earthquake/core.rb', line 77

def load_config
  config.reverse_update(default_config)

  [config[:dir], config[:plugin_dir]].each do |dir|
    unless File.exists?(dir)
      FileUtils.mkdir_p(dir)
    end
  end

  if File.exists?(config[:file])
    load config[:file]
  else
    File.open(config[:file], mode: 'w', perm: 0600).close
  end

  config.update(preferred_config) do |key, cur, new|
    if Hash === cur and Hash === new
      cur.merge(new)
    else
      new
    end
  end

  get_access_token unless self.config[:token] && self.config[:secret]
end

#load_plugins ⇒ Object 



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# File 'lib/earthquake/core.rb', line 103

def load_plugins
  Dir[File.join(config[:plugin_dir], '*.rb')].each do |lib|
    begin
      require_dependency lib
    rescue Exception => e
      error e
    end
  end
end

#mutex ⇒ Object 



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# File 'lib/earthquake/core.rb', line 228

def mutex
  @mutex ||= Mutex.new
end

#notify(message, options = {}) ⇒ Object Also known as: n 



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# File 'lib/earthquake/core.rb', line 252

def notify(message, options = {})
  args = {:title => 'earthquake'}.update(options)
  title = args.delete(:title)
  message = message.is_a?(String) ? message : message.inspect
  # FIXME: Escaping should be done at Notify.notify
  Notify.notify title, message.e
end

#once(&block) ⇒ Object 



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# File 'lib/earthquake/core.rb', line 30

def once(&block)
  onces << block
end

#onces ⇒ Object 



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# File 'lib/earthquake/core.rb', line 26

def onces
  @once ||= []
end

#preferred_config ⇒ Object 



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# File 'lib/earthquake/core.rb', line 10

def preferred_config
  @preferred_config ||= {}
end

#reconnect ⇒ Object 



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# File 'lib/earthquake/core.rb', line 163

def reconnect
  item_queue.clear
  start_stream(config[:api])
end

#reload ⇒ Object 



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# File 'lib/earthquake/core.rb', line 45

def reload
  Gem.refresh
  loaded = ActiveSupport::Dependencies.loaded.dup
  ActiveSupport::Dependencies.clear
  loaded.each { |lib| require_dependency lib }
rescue Exception => e
  error e
ensure
  _init
end

#restore_history ⇒ Object 



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# File 'lib/earthquake/core.rb', line 215

def restore_history
  history_file = File.join(config[:dir], 'history')
  begin
    File.read(history_file, :encoding => "BINARY").
      encode!(:invalid => :replace, :undef => :replace).
      split(/\n/).
      each { |line| Readline::HISTORY << line }
  rescue Errno::ENOENT
  rescue Errno::EACCES => e
    error(e)
  end
end

#start(options = {}) ⇒ Object 



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# File 'lib/earthquake/core.rb', line 124

def start(options = {})
  __init(options)
  restore_history

  EM.run do
    Thread.start do
      while buf = Readline.readline(config[:prompt], true)
        unless Readline::HISTORY.count == 1
          Readline::HISTORY.pop if buf.empty? || Readline::HISTORY[-1] == Readline::HISTORY[-2]
        end
        sync {
          reload
          store_history
          input(buf.strip)
        }
      end
      # unexpected
      stop
    end

    EM.add_periodic_timer(config[:output_interval]) do
      if @last_data_received_at && Time.now - @last_data_received_at > config[:no_data_timeout]
        begin
          reconnect
        rescue EventMachine::ConnectionError => e
          # ignore
        end
      end
      if Readline.line_buffer.nil? || Readline.line_buffer.empty?
        sync { output }
      end
    end

    reconnect unless options[:'no-stream'] == true

    trap('INT') { stop }
  end
end

#start_stream(options) ⇒ Object 



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# File 'lib/earthquake/core.rb', line 168

def start_stream(options)
  stop_stream

  options = {
    :oauth => config.slice(:consumer_key, :consumer_secret).merge(
      :access_key => config[:token], :access_secret => config[:secret],
      :proxy => ENV['http_proxy']
    )
  }.merge(options)

  @stream = ::Twitter::JSONStream.connect(options)

  @stream.each_item do |item|
    @last_data_received_at = Time.now # for reconnect when no data
    item_queue << JSON.parse(item)
  end

  @stream.on_error do |message|
    notify "error: #{message}"
  end

  @stream.on_reconnect do |timeout, retries|
    notify "reconnecting in: #{timeout} seconds"
  end

  @stream.on_max_reconnects do |timeout, retries|
    notify "Failed after #{retries} failed reconnects"
  end
end

#stop ⇒ Object 



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# File 'lib/earthquake/core.rb', line 202

def stop
  stop_stream
  EM.stop_event_loop
end

#stop_stream ⇒ Object 



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# File 'lib/earthquake/core.rb', line 198

def stop_stream
  @stream.stop if @stream
end

#store_history ⇒ Object 



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# File 'lib/earthquake/core.rb', line 207

def store_history
  history_size = config[:history_size]
  File.open(File.join(config[:dir], 'history'), 'w') do |file|
    lines = Readline::HISTORY.to_a[([Readline::HISTORY.size - history_size, 0].max)..-1]
    file.print(lines.join("\n"))
  end
end

#sync(&block) ⇒ Object 



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# File 'lib/earthquake/core.rb', line 232

def sync(&block)
  mutex.synchronize do
    block.call
  end
end