added simple game stats

control.go

@@ -2,6 +2,8 @@ package main
 
 import (
 	"encoding/json"
+	"errors"
+	"fmt"
 	"io/ioutil"
 	"log"
 	"net/http"
@@ -105,23 +107,49 @@ func listGames(w http.ResponseWriter, req *http.Request) {
 	}
 }
 
-func stopGame(w http.ResponseWriter, req *http.Request) {
-	trimmed := strings.Trim(req.URL.Path, "/")
-	fullPath := strings.Split(trimmed, "/")
-	log.Println(req.URL.Path)
-	if len(fullPath) != 3 {
+func gameStats(w http.ResponseWriter, req *http.Request) {
+	key, err := getGameId(req.URL.Path)
+	if err != nil {
 		http.Error(w, "improperly formed url", http.StatusBadRequest)
+	}
+	log.Printf("requested stats for game: %s", key)
+	games.RLock()
+	g, ok := games.m[key]
+	games.RUnlock()
+	if !ok {
+		http.NotFound(w, req)
 		return
 	}
-	key := fullPath[2]
+	g.winners.RLock()
+	defer g.winners.RUnlock()
+	if err := json.NewEncoder(w).Encode(g.winners.m); err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+	}
+}
+
+func stopGame(w http.ResponseWriter, req *http.Request) {
+	key, err := getGameId(req.URL.Path)
+	if err != nil {
+		http.Error(w, "improperly formed url", http.StatusBadRequest)
+	}
 	games.Lock()
-	gameid, ok := games.m[key]
+	g, ok := games.m[key]
 	defer games.Unlock()
 	if !ok {
 		http.NotFound(w, req)
 		return
 	}
-	gameid.kill <- true
+	g.kill <- true
+	message := struct {
+		Ok      bool   `json:"ok"`
+		Message string `json:"message"`
+	}{
+		Ok:      true,
+		Message: fmt.Sprintf("Successfully stopped game: %s", key),
+	}
+	if err := json.NewEncoder(w).Encode(message); err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+	}
 }
 
 func killServer(w http.ResponseWriter, req *http.Request) {
@@ -146,3 +174,14 @@ func index(w http.ResponseWriter, req *http.Request) {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 	}
 }
+
+func getGameId(path string) (string, error) {
+	var err error
+	trimmed := strings.Trim(path, "/")
+	fullPath := strings.Split(trimmed, "/")
+	if len(fullPath) != 3 {
+		return "", errors.New("improperly formed url")
+	}
+	key := fullPath[2]
+	return key, err
+}