Class: SBPanel::Game

Inherits:
Object
  • Object
show all
Defined in:
lib/sbpanel/game.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(state) ⇒ Game

Returns a new instance of Game.



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# File 'lib/sbpanel/game.rb', line 31

def initialize(state)
  @address = "starbound.mispy.me"
  @port = 21025
  
  @status = state[:status] || :unknown
  @last_status_change = state[:last_status_change] || Time.now # Persist last observed status change
  @players = state[:players] || {} # Persist info for players we've seen
  @worlds = state[:worlds] || {} # Persist info for worlds we've seen
  @chat = state[:chat] || [] # Chat logs

  @version = 'unknown' # Server version
  @online_players = [] # Players we've seen connect
  @active_worlds = [] # Worlds we've seen activated
  @offline_players = @players.values.select { |pl| !@online_players.include?(pl) }

  @timing = false # We read the log initially without timing
end

Instance Attribute Details

#address ⇒ Object

Returns the value of attribute address.



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# File 'lib/sbpanel/game.rb', line 8

def address
  @address
end

#log_path ⇒ Object

Returns the value of attribute log_path.



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# File 'lib/sbpanel/game.rb', line 8

def log_path
  @log_path
end

#state_path ⇒ Object

Returns the value of attribute state_path.



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# File 'lib/sbpanel/game.rb', line 8

def state_path
  @state_path
end

Class Method Details

.load(log_path) ⇒ Object 



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# File 'lib/sbpanel/game.rb', line 10

def self.load(log_path)
  state_path = File.join(File.dirname(log_path), ".sbpanel")

  state = {}
  if File.exists?(state_path)
    begin
      state = Marshal.load(File.read(state_path))
      puts "Loaded sbpanel state from #{state_path}"
    rescue Exception
      puts "Error loading sbpanel state, making new panel"
    end
  end

  panel = Game.new(state)

  panel.log_path = log_path
  panel.state_path = state_path
  panel.update_status
  panel
end

Instance Method Details

#parse_line(line, time) ⇒ Object 



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# File 'lib/sbpanel/game.rb', line 97

def parse_line(line, time)
  events = {
    version: /^Info: Server version '(.+?)'/,
    login: /^Info: Client '(.+?)' <.> \(.+?\) connected$/,
    logout: /^Info: Client '(.+?)' <.> \(.+?\) disconnected$/,
    world: /^Info: Loading world db for world (\S+)/,
    unworld: /^Info: Shutting down world (\S+)/,
    chat: /^Info:  <(.+?)> (.+?)$/
  }

  events.each do |name, regex|
    event = regex.match(line)
    next unless event

    case name
    when :version
      puts "Server version: #{event[1]}"
      @version = event[1]
      reset!
    when :login
      name = event[1]

      player = @players[name] || {}
      player[:name] = name
      player[:last_connect] = time if @timing
      @players[name] = player

      @online_players.push(player) unless @online_players.find { |pl| pl[:name] == name }
      @offline_players.delete_if { |pl| pl[:name] == name }
      puts "#{name} connected at #{player[:last_connect]}"
    when :logout
      name = event[1]

      player = @players[name] || {}
      player[:name] = name
      player[:last_disconnect] = time if @timing
      @players[name] = player

      @online_players.delete_if { |pl| pl[:name] == name }
      @offline_players.push(player) unless @offline_players.find { |pl| pl[:name] == name }
      puts "#{name} disconnected at #{player[:last_disconnect]}"
    when :world
      coords = event[1]

      world = @worlds[coords] || {}
      world[:coords] = coords
      world[:last_load] = time if @timing
      @worlds[coords] ||= world

      @active_worlds.push(world) unless @active_worlds.find { |w| w[:coords] == coords }
      puts "Loaded world #{coords}"
    when :unworld
      coords = event[1]

      world = @worlds[coords] || {}
      world[:coords] = coords
      world[:last_unload] = time if @timing
      @worlds[coords] ||= world

      @active_worlds.delete_if { |w| w[:coords] == coords }
      puts "Unloaded world #{coords}"
    when :chat
      chat = {
        name: event[1],
        text: event[2]
      }

      # Hacky attempt to prevent chat desync
      if @timing || @last_chat == @chat[-1]
        @chat.push(chat)
        puts "#{chat[:name]}: #{chat[:text]}"
      end
      @last_chat = chat
    end

    if @timing
      # For post-initial-load events, check server
      # status and save state updates
      update_status; save
    end
  end
end

#read_logs ⇒ Object 



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# File 'lib/sbpanel/game.rb', line 180

def read_logs
  # Initial read without timing
  File.read(@log_path).each_line do |line|
    parse_line(line, nil)
  end

  @timing = true
  log = File.open(@log_path)
  log.extend(File::Tail)
  log.backward(0)
  log.tail do |line|
    parse_line(line, Time.now)
  end

  log.close
end

#reset! ⇒ Object

Reset non-persistent state



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# File 'lib/sbpanel/game.rb', line 90

def reset!
  @last_status_change = Time.now if @timing
  @online_players = []
  @active_worlds = []
  @offline_players = @players.values.select { |pl| !@online_players.include?(pl) }
end

#save ⇒ Object 



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# File 'lib/sbpanel/game.rb', line 49

def save
  File.open(@state_path, 'w') do |f|
    f.write(Marshal.dump({
      players: @players,
      worlds: @worlds,
      status: @status,
      last_status_change: @last_status_change,
      chat: @chat
    }))
  end
end

#update_status ⇒ Object

Detect server status Looks for processes which have log file open for writing



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# File 'lib/sbpanel/game.rb', line 63

def update_status
  status = :offline
  fuser = `fuser -v #{@log_path} 2>&1`.split("\n")[2..-1]
  
  if fuser
    fuser.each do |line|
      if line.strip.split[2].include?('F')
        status = :online
      end
    end
  end

  if status != @status
    time = Time.now
    if status == :offline
      puts "Server is currently offline"
    else
      puts "Server is currently online"
    end

    @status = status
    @last_status_change = time
    reset!
  end
end