From 78edba4c023e5a74a3f2ad470b510e7467c5d498 Mon Sep 17 00:00:00 2001
From: griffi-gh <prasol258@gmail.com>
Date: Sat, 4 Feb 2023 02:46:48 +0100
Subject: [PATCH] client is almost finished...

---
 kubi-udp/src/client.rs | 95 ++++++++++++++++++++++++++++++++----------
 1 file changed, 72 insertions(+), 23 deletions(-)

diff --git a/kubi-udp/src/client.rs b/kubi-udp/src/client.rs
index 1551723..4bddda6 100644
--- a/kubi-udp/src/client.rs
+++ b/kubi-udp/src/client.rs
@@ -1,12 +1,13 @@
 use anyhow::{Result, bail};
 use std::{
   net::{UdpSocket, SocketAddr},
-  marker::PhantomData, time::{Instant, Duration}
+  time::{Instant, Duration},
+  marker::PhantomData, 
 };
 use bincode::{Encode, Decode};
 use crate::{
   BINCODE_CONFIG, 
-  packet::{ClientPacket, IdClientPacket},
+  packet::{ClientPacket, IdClientPacket, IdServerPacket, ServerPacket},
   common::{ClientId, DisconnectReason}
 };
 
@@ -24,8 +25,8 @@ pub struct ClientConfig {
 }
 
 pub struct Client<S, R> where S: Encode + Decode, R: Encode + Decode {
+  pub config: ClientConfig,
   addr: SocketAddr,
-  config: ClientConfig,
   socket: UdpSocket,
   status: ClientStatus,
   timeout: Instant,
@@ -53,48 +54,65 @@ impl<S, R> Client<S, R> where S: Encode + Decode, R: Encode + Decode {
       _r: PhantomData,
     })
   }
-  pub fn connect(&mut self) -> Result<()> {
-    if self.status != ClientStatus::Disconnected {
-      bail!("Not Disconnected");
-    }
-    self.status = ClientStatus::Connecting;
-    self.timeout = Instant::now();
-    self.last_heartbeat = Instant::now();
-    self.socket.connect(self.addr)?;
-    self.send_raw_packet(ClientPacket::Connect)?;
-    Ok(())
-  }
+  
   fn send_raw_packet(&self, packet: ClientPacket<S>) -> Result<()> {
     let id_packet = IdClientPacket(self.client_id, packet);
     let bytes = bincode::encode_to_vec(id_packet, BINCODE_CONFIG)?;
     self.socket.send(&bytes)?;
     Ok(())
   }
-  pub fn send_message(&self, message: S) -> Result<()> {
-    self.send_raw_packet(ClientPacket::Data(message))?;
-    Ok(())
-  }
-  fn disconnect_inner(&mut self, reason: DisconnectReason) -> Result<()> {
-    self.send_raw_packet(ClientPacket::Disconnect)?;
+  
+  fn disconnect_inner(&mut self, reason: DisconnectReason, silent: bool) -> Result<()> {
+    if !silent {
+      self.send_raw_packet(ClientPacket::Disconnect)?;
+    }
+    self.client_id = None;
     self.status = ClientStatus::Disconnected;
     self.disconnect_reason = reason;
     Ok(())
   }
+
+  fn reset_timeout(&mut self) {
+    self.timeout = Instant::now();
+  }
+
+  
+  pub fn connect(&mut self) -> Result<()> {
+    if self.status != ClientStatus::Disconnected {
+      bail!("Not Disconnected");
+    }
+    self.status = ClientStatus::Connecting;
+    self.last_heartbeat = Instant::now();
+    self.reset_timeout();
+    self.socket.connect(self.addr)?;
+    self.send_raw_packet(ClientPacket::Connect)?;
+    Ok(())
+  }
+
   pub fn disconnect(&mut self) -> Result<()> {
     if self.status != ClientStatus::Connected {
       bail!("Not Connected");
     }
-    self.disconnect_inner(DisconnectReason::ClientDisconnected)?;
+    self.disconnect_inner(DisconnectReason::ClientDisconnected, false)?;
     Ok(())
   }
-  pub fn update(&mut self) -> Result<()> {
+
+  pub fn send_message(&self, message: S) -> Result<()> {
+    if self.status != ClientStatus::Connected {
+      bail!("Not Connected");
+    }
+    self.send_raw_packet(ClientPacket::Data(message))?;
+    Ok(())
+  }
+  
+  pub fn update(&mut self, callback: fn(R) -> Result<()>) -> Result<()> {
     if self.status == ClientStatus::Disconnected {
       return Ok(())
     }
     if self.timeout.elapsed() > self.config.timeout {
       log::warn!("Client timed out");
       //We don't care if this packet actually gets sent because the server is likely dead
-      let _ = self.disconnect_inner(DisconnectReason::ClientDisconnected).map_err(|_| {
+      let _ = self.disconnect_inner(DisconnectReason::ClientDisconnected, false).map_err(|_| {
         log::warn!("Failed to send disconnect packet");
       });
       return Ok(())
@@ -104,6 +122,37 @@ impl<S, R> Client<S, R> where S: Encode + Decode, R: Encode + Decode {
       self.send_raw_packet(ClientPacket::Heartbeat)?;
       self.last_heartbeat = Instant::now();
     }
+    //receive
+    let mut buf = Vec::new();
+    loop {
+      if self.socket.recv(&mut buf).is_ok() {
+        //TODO check the first byte of the raw data instead of decoding?
+        let (packet, _): (IdServerPacket<R>, _) = bincode::decode_from_slice(&buf, BINCODE_CONFIG)?;
+        let IdServerPacket(user_id, packet) = packet;
+        if self.client_id.map(|x| Some(x) != user_id).unwrap_or_default() {
+          continue
+        }
+        self.reset_timeout();
+        match packet {
+          ServerPacket::Connected(client_id) => {
+            self.client_id = Some(client_id);
+            self.status = ClientStatus::Connected;
+            return Ok(())
+          },
+          ServerPacket::Disconnected => {
+            //this should never fail but we're handling the error anyway
+            self.disconnect_inner(DisconnectReason::KickedByServer, true)?;
+            return Ok(())
+          },
+          ServerPacket::Data(message) => {
+            callback(message)?;
+          }
+        }
+      } else {
+        break
+      }
+      buf.clear();
+    }
     Ok(())
   }
 }