Class: CraftClient::Server

Inherits:
Object
  • Object
show all
Defined in:
lib/craft_client/server.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(username, identity_token, server_name, server_port) ⇒ Server

Returns a new instance of Server.



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# File 'lib/craft_client/server.rb', line 6

def initialize(username, identity_token, server_name, server_port)
  @username = username
  @identity_token = identity_token

  @server_name = server_name
  @server_port = server_port
  @block_cache = {}
  @players = {}

  @write_mutex = Mutex.new

  @buffer = ''

  @tcp = nil
end

Instance Attribute Details

#block_cache ⇒ Object

Returns the value of attribute block_cache.



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# File 'lib/craft_client/server.rb', line 3

def block_cache
  @block_cache
end

#players ⇒ Object (readonly)

Returns the value of attribute players.



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# File 'lib/craft_client/server.rb', line 4

def players
  @players
end

#username ⇒ Object (readonly)

Returns the value of attribute username.



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# File 'lib/craft_client/server.rb', line 4

def username
  @username
end

Instance Method Details

#connect ⇒ Object 



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# File 'lib/craft_client/server.rb', line 22

def connect
  # Authenticate with craft.michaelfogleman.com
  uri = URI.parse('https://craft.michaelfogleman.com/api/1/identity')
  http = Net::HTTP.new(uri.host, uri.port)
  http.use_ssl = true

  response = http.post(uri.request_uri, "username=#{@username}&identity_token=#{@identity_token}")
  server_token = response.body.chomp
  fail 'Could not authenticate!' if server_token.length != 32

  # Connect and authenticate with the server
  @tcp = TCPSocket.new(@server_name, @server_port)
  @tcp.puts("A,#{@username},#{server_token}")
end

#disconnect ⇒ Object 



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# File 'lib/craft_client/server.rb', line 147

def disconnect
  @tcp.close unless @tcp.nil?
end

#flush_buffer ⇒ Object 



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# File 'lib/craft_client/server.rb', line 105

def flush_buffer
  @write_mutex.synchronize do
    @tcp.write(@buffer)
    @tcp.flush
    @buffer = ''
  end
end

#get_block(x, y, z) ⇒ Object

get_block_at



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# File 'lib/craft_client/server.rb', line 73

def get_block(x, y, z)     # get_block_at
  # Return block if it exists in cache
  return @block_cache[[x, y, z]] unless @block_cache[[x, y, z]].nil?

  # Otherwise, request the chunk the block is in.
  @write_mutex.synchronize do
    chunk_x = (x / CHUNK_SIZE).floor
    chunk_z = (z / CHUNK_SIZE).floor
    @tcp.puts("C,#{chunk_x},#{chunk_z}")
    @tcp.flush

    # Keep mutex locked to stop other threads requesting from server
    loop do
      data = @tcp.gets.chomp.split(',')
      if data[0] == 'B'
        @block_cache[[data[3].to_i, data[4].to_i, data[5].to_i]] = data[6].to_i
      elsif data[0] == 'C'
        break
      end
    end
  end

  @block_cache[[x, y, z]]
end

#get_event ⇒ Object 



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# File 'lib/craft_client/server.rb', line 37

def get_event
  # Blocks and returns an event hash
  data = @tcp.gets.chomp.split(',')

  case data[0]
  when 'T'            # Chat message
    message_contents = data[1 .. -1].join(',')
    if !message_contents.split('>')[1].nil? # If message was said by player
      return { type: :chat_message, sender: message_contents.split('>')[0], message: message_contents.split('>')[1 .. -1].join('>').lstrip }
    else
      return { type: :chat_special, message: message_contents }
    end
  when 'B'            # Block change
    pos = [data[3].to_i, data[4].to_i, data[5].to_i] # Create the position data
    return nil if data[1].to_i != pos[0] / CHUNK_SIZE || data[2].to_i != pos[2] / CHUNK_SIZE
    @block_cache[pos] = data[6].to_i
    return { type: :block_change, pos: pos, id: data[6].to_i }
  when 'S'            # Sign change
    return { type: :sign_update, pos: [data[3].to_i, data[4].to_i, data[5].to_i], facing: data[6].to_i, text: (data[7..-1] || []).join(',') }
  when 'N'            # Player join
    prepare_player(data[1].to_i)
    @players[data[1].to_i][:name] = data[2..-1].join(',')
    return { type: :player_join, id: data[1].to_i, name: data[2..-1].join(',') }
  when 'P'            # Player position
    prepare_player(data[1].to_i)
    @players[data[1].to_i][:pos] = data[2..-1].map(&:to_f)
    return { type: :player_position, id: data[1].to_i, pos: @players[data[1].to_i][:pos] }
  when 'D'            # Player leave
    event = { type: :player_leave, id: data[1].to_i, name: @players[data[1].to_i][:name] }
    @players.delete(data[1].to_i)
    return event
  else
    return nil
  end
end

#send_chat_message(message) ⇒ Object 



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# File 'lib/craft_client/server.rb', line 113

def send_chat_message(message)
  @write_mutex.synchronize do
    message.lines.each do |line|
      @buffer += "T,#{line.chomp}\n"
    end
  end
end

#send_private_message(player, message) ⇒ Object 



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# File 'lib/craft_client/server.rb', line 121

def send_private_message(player, message)
  @write_mutex.synchronize do
    message.lines.each do |line|
      @buffer += "T,@#{player} #{line.chomp}\n"
    end
  end
end

#set_block(x, y, z, id) ⇒ Object

set_block



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# File 'lib/craft_client/server.rb', line 98

def set_block(x, y, z, id) # set_block
  @block_cache[[x, y, z]] = id
  @write_mutex.synchronize do
    @buffer += "B,#{x},#{y},#{z},#{id}\n"
  end
end

#set_light(x, y, z, light) ⇒ Object 



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# File 'lib/craft_client/server.rb', line 141

def set_light(x, y, z, light)
  @write_mutex.synchronize do
    @buffer += "L,#{x},#{y},#{z},#{light}\n"
  end
end

#set_position(x, y, z, rotate_x, rotate_y) ⇒ Object 



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# File 'lib/craft_client/server.rb', line 135

def set_position(x, y, z, rotate_x, rotate_y)
  @write_mutex.synchronize do
    @buffer += "P,#{x.to_f},#{y.to_f},#{z.to_f},#{rotate_x.to_f},#{rotate_y.to_f}\n"
  end
end

#set_sign(x, y, z, facing, text) ⇒ Object 



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# File 'lib/craft_client/server.rb', line 129

def set_sign(x, y, z, facing, text)
  @write_mutex.synchronize do
    @buffer += "S,#{x},#{y},#{z},#{facing},#{text}\n"
  end
end