1 files changed, 65 insertions, 0 deletions
diff --git a/webhogg/game_server/src/scribble_group.rs b/webhogg/game_server/src/scribble_group.rs
new file mode 100644
index 0000000..8980e7b
--- /dev/null
+++ b/webhogg/game_server/src/scribble_group.rs
@@ -0,0 +1,65 @@
+use crate::group::{Group, GroupId};
+use crate::server::{UserId, GameClient,
+                    ClientSender, ClientReceiver,
+                    GameServerError};
+use std::collections::HashMap;
+use std::sync::{Arc, Mutex};
+
+pub struct ScribbleGroup {
+    id: GroupId,
+    name: String,
+    senders: Arc<Mutex<HashMap<UserId, ClientSender>>>
+}
+
+impl Group for ScribbleGroup {
+    fn id(&self) -> GroupId {
+        self.id
+    }
+
+    fn group_type(&self) -> String {
+        "scribble".to_string()
+    }
+
+    fn name(&self) -> String {
+        self.name.clone()
+    }
+
+    fn run(&mut self) {
+        info!("a new group {}:'{}' runs now", self.id, self.name);
+    }
+
+    fn add_client(&mut self, id: UserId, client: GameClient) -> Result<(), GameServerError> {
+        debug!("user {} joined the group {}:'{}'", id, self.id, self.name);
+        let (sen, rec) = client.split();
+        self.senders.lock().unwrap().insert(id, sen);
+        let senders_mutex = self.senders.clone();
+        let self_uid = id;
+        std::thread::spawn(move || Self::broadcast_clients(self_uid, rec, senders_mutex));
+        Ok(())
+    }
+}
+
+impl ScribbleGroup {
+    pub fn new(id: GroupId, name: String) -> Self {
+        Self { id, name, senders: Arc::new(Mutex::new(HashMap::new())) }
+    }
+
+    fn broadcast_clients(self_uid: UserId, mut rec: ClientReceiver, senders_mutex: Arc<Mutex<HashMap<UserId, ClientSender>>>) {
+        loop {
+            let message = match rec.recv_message() {
+                Ok(x) => x,
+                _ => break
+            };
+            //trace!("got message: '{:?}'", message);
+            let mut senders = senders_mutex.lock().unwrap();
+            for (uid, sender) in senders.iter_mut() {
+                if self_uid != *uid {
+                    sender.send_message(&message)
+                        .unwrap_or_else(|_| debug!("tried to send message to {}, but failed", *uid));
+                }
+            }
+        }
+        senders_mutex.lock().unwrap().remove(&self_uid);
+        info!("client {} has left", self_uid);
+    }
+}