don't crash on setupRound() when there're no more quotes

server/src/game/finishGame.go

@@ -6,7 +6,7 @@ import (
 
 func (gm *Game) FinishGame() {
 	state, _ := gm.GetState()
-	if state != STATE_PLAY {
+	if state != STATE_IDLE && state != STATE_PLAY {
 		fmt.Printf("invalid state, can't finish game in %s state\n", state)
 		return
 	}

server/src/game/runRound.go

@@ -17,6 +17,10 @@ func (gm *Game) runRound() {
 		return
 	}
 
-	gm.setupRound()
+	errRound := gm.setupRound()
+	if errRound != nil {
+		gm.runFinal()
+		return
+	}
 	gm.notifyClients()
 }

server/src/game/setupRound.go

@@ -7,9 +7,10 @@ import (
 	"time"
 )
 
-func (gm *Game) setupRound() {
+func (gm *Game) setupRound() error {
 	gm.round = newRound()
-	gm.selectQuote()
+	err := gm.selectQuote()
+	return err
 }
 
 func newRound() Round {
@@ -22,7 +23,7 @@ func newRound() Round {
 	}
 }
 
-func (gm *Game) selectQuote() {
+func (gm *Game) selectQuote() error {
 	allQuotes := gm.getAllQuotes()
 
 	r := rand.New(rand.NewSource(time.Now().UnixNano()))
@@ -46,6 +47,11 @@ func (gm *Game) selectQuote() {
 			}
 		}
 	}
+
+	if quote == nil {
+		return fmt.Errorf("no more quotes found")
+	}
+
 	gm.mu.Lock()
 	defer gm.mu.Unlock()
 
@@ -54,6 +60,7 @@ func (gm *Game) selectQuote() {
 	for idx, idxPerm := range r.Perm(len(sources)) {
 		gm.round.sources[idx] = sources[idxPerm]
 	}
+	return nil
 }
 
 func (gm *Game) getSourceById(id string) Source {