MCNet devices/servant

--[[

    Minecraft Intranet
    Servant device

--]]

mcnet = mcnet or {}
local device = mcnet.device or {}
mcnet.device = device

local Servant = common.newClass(device.Device, {
    registerServerMessage = nil,
    registeredServerMessage = nil,
    serverId = nil
})
device.Servant = Servant

-- Constructor
function Servant:init()
    device.Device.init(self)

    self:addMessageHandler{
        [self.registeredServerMessage] = self.handleRegisteredServer,
        deviceOn = self.handleRegisterServer,
        deviceDetect = self.handleRegisterServer,
        deviceOff = self.handleUnregisterServer
    }
end

-- Check if this servant is connected to a server
function Servant:isConnected()
    return self.serverId ~= nil
end

-- Check if the given device is a server
function Servant:checkServer(deviceType, deviceAddress)
    return true
end

function Servant:handleRegisteredServer(senderId, msg)
    if (self:checkAddress(msg.to)) then
        -- Registered
        self.serverId = senderId
        self.address = msg.to
        self:trigger("registeredServer")
        return true
    end

    return false
end

function Servant:handleRegisterServer(senderId, msg)
    if (self:checkServer(msg.device, msg.from)) then
        -- Register
        self:trigger("registerServer", senderId)
        self:send(senderId, mcnet.message.new{
            type = self.registerServerMessage
        })
        return true
    end

    return false
end

function Servant:handleUnregisterServer(senderId, msg)
    if (self.serverId == senderId) then
        -- Unregister
        self:trigger("unregisteredServer", self.serverId)
        self.serverId = nil
        return true
    end

    return false
end