Implement quick join

frontend/prebuild/src/app/login/login.component.html

@@ -3,18 +3,24 @@
     <div id="login-title">
       <h1>Liberty Bikes</h1>
     </div>
-    <div id="login-form">
+    <div class="login-form">
       <div class="form-item">
         <label>Username</label>
         <input type="text" id="username" name="username" autofocus>
       </div>
+    </div>
+    <div class="button-bar">
+      <button type="button" (click)="quickJoin()">Quick Join</button>
+    </div>
+    <div></div>
+    <div class="login-form">
       <div class="form-item">
         <label>Code</label>
         <input type="text" id="roundid" name="roundid" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false">
       </div>
     </div>
-    <div id="button-bar">
-      <button type="button" (click)="joinRound()">Login</button>
+    <div class="button-bar">
+      <button type="button" (click)="joinRound()">Join Round</button>
       <button type="button" (click)="createRound()">Create Round</button>
       <button id="hostButton" type="button" (click)="hostRound()" data-loading-text="Connecting..." autocomplete="off">Host Round</button>
     </div>

frontend/prebuild/src/app/login/login.component.scss

@@ -42,7 +42,7 @@
   padding-bottom: 50px;
 }
 
-#login-form {
+.login-form {
   width: 100%;
   margin-bottom: 15px;
 }
@@ -85,7 +85,7 @@
   text-transform: uppercase;
 }
 
-#button-bar {
+.button-bar {
   display: flex;
   flex-flow: column;
   width: 100%;
@@ -93,7 +93,7 @@
   padding-right: 10px;
 }
 
-#button-bar button {
+.button-bar button {
   width: 100%;
   margin-top: 6px;
   margin-bottom: 6px;

frontend/prebuild/src/app/login/login.component.ts

@@ -36,11 +36,23 @@ export class LoginComponent implements OnInit {
     }
 
   }
+  
+  async quickJoin() {
+    // First get an unstarted round ID
+	  let roundID = await this.http.post(`${environment.API_URL_GAME_ROUND}/available`, "", { responseType: 'text' }).toPromise();
+	  
+	// Then join the round
+	this.joinRoundById(roundID);
+  }
+  
+  async joinRound() {
+	  let roundID: string = $('#roundid').val();
+      this.joinRoundById(roundID);
+  }
 
-async joinRound() {
+async joinRoundById(roundID: string) {
   let ngZone = this.ngZone;
   let router = this.router;
-  let roundID: string = $('#roundid').val();
   let username: string = $('#username').val();
   roundID = roundID.toUpperCase().replace(/[^A-Z]/g, '');
   let gameBoard = true;

game-service/src/main/java/org/libertybikes/game/core/GameRound.java

@@ -399,6 +399,9 @@ public class GameRound implements Runnable {
             // If there are any clients still connected to this game, keep sending heartbeats
             if (round.clients.size() == 0) {
                 log("No clients remaining.  Cancelling heartbeat.");
+                // Ensure that game state is closed off so that no other players can quick join while a round is marked for deletion
+                if (gameState == State.OPEN)
+                    gameState = State.FINISHED;
                 return null;
             }
             return Date.from(Instant.now().plusSeconds(HEARTBEAT_INTERVAL_SEC));

game-service/src/main/java/org/libertybikes/game/round/service/GameRoundService.java

@@ -2,6 +2,7 @@ package org.libertybikes.game.round.service;
 
 import java.util.Collection;
 import java.util.Map;
+import java.util.Optional;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.TimeUnit;
 
@@ -16,6 +17,7 @@ import javax.ws.rs.Produces;
 import javax.ws.rs.core.MediaType;
 
 import org.libertybikes.game.core.GameRound;
+import org.libertybikes.game.core.GameRound.State;
 
 @Path("/")
 @ApplicationScoped
@@ -44,6 +46,19 @@ public class GameRoundService {
         return p.id;
     }
 
+    @POST
+    @Path("/available")
+    public String getAvailableRound() {
+        Optional<GameRound> availableRound = allRounds.values()
+                        .stream()
+                        .filter(r -> r.gameState == GameRound.State.OPEN)
+                        .findFirst();
+        if (availableRound.isPresent())
+            return availableRound.get().id;
+        else
+            return createRound();
+    }
+
     @GET
     @Path("/{roundId}")
     @Produces(MediaType.APPLICATION_JSON)
@@ -71,7 +86,10 @@ public class GameRoundService {
             return nextRound;
     }
 
-    public void deleteRound(String roundId) {
+    public void deleteRound(GameRound round) {
+        String roundId = round.id;
+        if (round.gameState == State.OPEN)
+            round.gameState = State.FINISHED;
         System.out.println("Scheduling round id=" + roundId + " for deletion in 5 minutes");
         // Do not immediately delete rounds in order to give players/spectators time to move along to the next game
         exec.schedule(() -> {

game-service/src/main/java/org/libertybikes/game/round/service/GameRoundWebsocket.java

@@ -51,7 +51,7 @@ public class GameRoundWebsocket {
             GameRound round = gameSvc.getRound(roundId);
             if (round != null)
                 if (round.removeClient(session) == 0)
-                    gameSvc.deleteRound(roundId);
+                    gameSvc.deleteRound(round);
         } catch (Exception e) {
             e.printStackTrace();
         }