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package o1game.Server
// TODO: TLS/SSL / import javax.net.ssl.SSLServerSocketFactory
import java.lang.Thread.sleep
import java.net.{ServerSocket, Socket}
import o1game.constants.*
import o1game.Model.Adventure
import o1game.Model.Entity
/** Converts this string to an array of bytes (probably for transmission).
*
* @param str the string to convert
* @return an array of bytes representing the string in UTF8.
*/
def stringToByteArray(str: String): Array[Byte] =
str.toVector.map(_.toByte).toArray
/** `Server` exists to initialize a server for the game
* and run it with its method `startServer`.
*/
class Server(port: Int, maxClients: Int, val timeLimit: Int):
private val socket = ServerSocket(port)
private val clientGetter = ConnectionGetter(socket)
private val clients: Clients = Clients(maxClients)
private val buffer: Array[Byte] = Array.ofDim(1024)
private var bufferIndex = 0
private var adventure: Option[Adventure] = None
/** Starts the server. Won't terminate under normal circumstances. */
def startServer(): Unit =
while true do
sleep(POLL_INTERVAL)
this.receiveNewClient()
this.readFromAll()
this.writeClientDataToClients()
this.clients.removeNonCompliant()
this.clients.foreach(_.interpretData())
if this.adventure.isEmpty && !this.clients.isEmpty && this.clients.forall(_.isReadyForGameStart) then
this.adventure = Some(Adventure(this.clients.names))
this.clients.foreach( c =>
c.gameStart()
val name = c.getName
val entity: Option[Entity] = name match
case Some(n) => this.adventure match
case Some(a) => a.getPlayer(n)
case None => None
case None => None
entity.map(c.giveEntity(_))
)
this.writeToAll(s"$timeLimit")
/** Receives a new client and stores it in `clients`.
*
* @return describes if a client was added
*/
private def receiveNewClient(): Boolean =
this.clientGetter.newClient() match
case Some(c) =>
clients.addClient(Client(c))
true
case None =>
false
/** Sends `message` to all clients
*
* @param message the message to send
*/
private def writeToAll(message: String): Unit =
this.clients.mapAndRemove(c =>
val output = c.socket.getOutputStream
output.write(message.toVector.map(_.toByte).toArray)
output.flush()
)
/** Sends every client's `dataToThisClient` to the client */
private def writeClientDataToClients(): Unit =
this.clients.mapAndRemove(c =>
val output = c.socket.getOutputStream
val data = c.dataToThisClient()
output.write(data.toVector.map(_.toByte).toArray)
output.flush()
)
/** Reads data sent by clients and stores it in the `Client`s of `clients` */
private def readFromAll(): Unit =
clients.mapAndRemove(c =>
val input = c.socket.getInputStream
while input.available() != 0 do
val bytesRead = input.read(buffer)
if bytesRead != -1 then
c.receiveData(buffer.take(bytesRead).toVector)
)
end Server
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