initial commit

1 files changed, 259 insertions, 0 deletions

diff --git a/backend/main.go b/backend/main.go
new file mode 100644
index 0000000..68df25b
--- /dev/null
+++ b/backend/main.go
@@ -0,0 +1,259 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"strconv"
+	"time"
+
+	"github.com/jmoiron/sqlx"
+	_ "github.com/lib/pq"
+)
+
+type Config struct {
+	dbHost     string
+	dbPort     string
+	dbUser     string
+	dbPassword string
+	dbName     string
+}
+
+var config *Config
+
+var db *sqlx.DB
+
+func loadEnv() (*Config, error) {
+	dbHost, exists := os.LookupEnv("ALBATROSS_DB_HOST")
+	if !exists {
+		return nil, fmt.Errorf("ALBATROSS_DB_HOST not set")
+	}
+	dbPort, exists := os.LookupEnv("ALBATROSS_DB_PORT")
+	if !exists {
+		return nil, fmt.Errorf("ALBATROSS_DB_PORT not set")
+	}
+	dbUser, exists := os.LookupEnv("ALBATROSS_DB_USER")
+	if !exists {
+		return nil, fmt.Errorf("ALBATROSS_DB_USER not set")
+	}
+	dbPassword, exists := os.LookupEnv("ALBATROSS_DB_PASSWORD")
+	if !exists {
+		return nil, fmt.Errorf("ALBATROSS_DB_PASSWORD not set")
+	}
+	dbName, exists := os.LookupEnv("ALBATROSS_DB_NAME")
+	if !exists {
+		return nil, fmt.Errorf("ALBATROSS_DB_NAME not set")
+	}
+	return &Config{
+		dbHost:     dbHost,
+		dbPort:     dbPort,
+		dbUser:     dbUser,
+		dbPassword: dbPassword,
+		dbName:     dbName,
+	}, nil
+}
+
+const (
+	gameTypeGolf = "golf"
+	gameTypeRace = "race"
+)
+
+const (
+	gameStateWaiting  = "waiting"
+	gameStateReady    = "ready"
+	gameStatePlaying  = "playing"
+	gameStateFinished = "finished"
+)
+
+type Game struct {
+	GameID int `db:"game_id"`
+	// "golf" or "race"
+	Type      string `db:"type"`
+	CreatedAt string `db:"created_at"`
+	State     string `db:"state"`
+}
+
+func initDB() error {
+	_, err := db.Exec(`
+		CREATE TABLE IF NOT EXISTS games (
+			game_id SERIAL PRIMARY KEY,
+			type VARCHAR(255) NOT NULL,
+			created_at TIMESTAMP NOT NULL DEFAULT NOW(),
+			state VARCHAR(255) NOT NULL
+		);
+	`)
+	return err
+}
+
+var gameHubs = map[int]*GameHub{}
+
+func startGame(game *Game) {
+	if gameHubs[game.GameID] != nil {
+		return
+	}
+	gameHubs[game.GameID] = NewGameHub(game)
+	go gameHubs[game.GameID].Run()
+}
+
+func handleGolfPost(w http.ResponseWriter, r *http.Request) {
+	var yourTeam string
+	waitingGolfGames := []Game{}
+	err := db.Select(&waitingGolfGames, "SELECT * FROM games WHERE type = $1 AND state = $2 ORDER BY created_at", gameTypeGolf, gameStateWaiting)
+	if err != nil {
+		http.Error(w, "Error getting games", http.StatusInternalServerError)
+		return
+	}
+	if len(waitingGolfGames) == 0 {
+		_, err = db.Exec("INSERT INTO games (type, state) VALUES ($1, $2)", gameTypeGolf, gameStateWaiting)
+		if err != nil {
+			http.Error(w, "Error creating game", http.StatusInternalServerError)
+			return
+		}
+		waitingGolfGames = []Game{}
+		err = db.Select(&waitingGolfGames, "SELECT * FROM games WHERE type = $1 AND state = $2 ORDER BY created_at", gameTypeGolf, gameStateWaiting)
+		if err != nil {
+			http.Error(w, "Error getting games", http.StatusInternalServerError)
+			return
+		}
+		yourTeam = "a"
+		startGame(&waitingGolfGames[0])
+	} else {
+		yourTeam = "b"
+		db.Exec("UPDATE games SET state = $1 WHERE game_id = $2", gameStateReady, waitingGolfGames[0].GameID)
+	}
+	waitingGame := waitingGolfGames[0]
+
+	http.Redirect(w, r, fmt.Sprintf("/golf/%d/%s/", waitingGame.GameID, yourTeam), http.StatusSeeOther)
+}
+
+func handleRacePost(w http.ResponseWriter, r *http.Request) {
+	http.Redirect(w, r, "/race/1/a/", http.StatusSeeOther)
+}
+
+func main() {
+	var err error
+	config, err = loadEnv()
+	if err != nil {
+		fmt.Printf("Error loading env %v", err)
+		return
+	}
+
+	for i := 0; i < 5; i++ {
+		db, err = sqlx.Connect("postgres", fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=%s sslmode=disable", config.dbHost, config.dbPort, config.dbUser, config.dbPassword, config.dbName))
+		if err == nil {
+			break
+		}
+		time.Sleep(5 * time.Second)
+	}
+	if err != nil {
+		log.Fatalf("Error connecting to db %v", err)
+	}
+	defer db.Close()
+
+	err = initDB()
+	if err != nil {
+		log.Fatalf("Error initializing db %v", err)
+	}
+
+	server := http.NewServeMux()
+
+	server.HandleFunc("GET /js/", func(w http.ResponseWriter, r *http.Request) {
+		http.ServeFile(w, r, "./public"+r.URL.Path)
+	})
+
+	server.HandleFunc("GET /{$}", func(w http.ResponseWriter, r *http.Request) {
+		http.ServeFile(w, r, "./public/index.html")
+	})
+
+	server.HandleFunc("GET /golf/{$}", func(w http.ResponseWriter, r *http.Request) {
+		http.ServeFile(w, r, "./public/golf/index.html")
+	})
+
+	server.HandleFunc("POST /golf/{$}", func(w http.ResponseWriter, r *http.Request) {
+		handleGolfPost(w, r)
+	})
+
+	server.HandleFunc("GET /golf/{gameId}/watch/{$}", func(w http.ResponseWriter, r *http.Request) {
+		http.ServeFile(w, r, "./public/golf/watch.html")
+	})
+
+	server.HandleFunc("GET /sock/golf/{gameId}/watch/{$}", func(w http.ResponseWriter, r *http.Request) {
+		gameId := r.PathValue("gameId")
+		gameIdInt, err := strconv.Atoi(gameId)
+		if err != nil {
+			http.Error(w, "Invalid game id", http.StatusBadRequest)
+			return
+		}
+		var hub *GameHub
+		for _, h := range gameHubs {
+			if h.game.GameID == gameIdInt {
+				hub = h
+				break
+			}
+		}
+		if hub == nil {
+			http.Error(w, "Game not found", http.StatusNotFound)
+			return
+		}
+		serveWsWatcher(hub, w, r)
+	})
+
+	server.HandleFunc("GET /golf/{gameId}/{team}/{$}", func(w http.ResponseWriter, r *http.Request) {
+		http.ServeFile(w, r, "./public/golf/game.html")
+	})
+
+	server.HandleFunc("GET /sock/golf/{gameId}/{team}/{$}", func(w http.ResponseWriter, r *http.Request) {
+		gameId := r.PathValue("gameId")
+		gameIdInt, err := strconv.Atoi(gameId)
+		if err != nil {
+			http.Error(w, "Invalid game id", http.StatusBadRequest)
+			return
+		}
+		var hub *GameHub
+		for _, h := range gameHubs {
+			if h.game.GameID == gameIdInt {
+				hub = h
+				break
+			}
+		}
+		if hub == nil {
+			http.Error(w, "Game not found", http.StatusNotFound)
+			return
+		}
+		team := r.PathValue("team")
+		serveWs(hub, w, r, team)
+	})
+
+	server.HandleFunc("GET /race/{$}", func(w http.ResponseWriter, r *http.Request) {
+		http.ServeFile(w, r, "./public/race/index.html")
+	})
+
+	server.HandleFunc("POST /race/{$}", func(w http.ResponseWriter, r *http.Request) {
+		handleRacePost(w, r)
+	})
+
+	server.HandleFunc("GET /race/{gameId}/watch/{$}", func(w http.ResponseWriter, r *http.Request) {
+		http.ServeFile(w, r, "./public/race/watch.html")
+	})
+
+	server.HandleFunc("GET /sock/race/{gameId}/watch/{$}", func(w http.ResponseWriter, r *http.Request) {
+		// TODO
+	})
+
+	server.HandleFunc("GET /race/{gameId}/{team}/{$}", func(w http.ResponseWriter, r *http.Request) {
+		http.ServeFile(w, r, "./public/race/game.html")
+	})
+
+	server.HandleFunc("GET /sock/race/{gameId}/{team}/{$}", func(w http.ResponseWriter, r *http.Request) {
+		// TODO
+	})
+
+	defer func() {
+		for _, hub := range gameHubs {
+			hub.Close()
+		}
+	}()
+
+	http.ListenAndServe(":80", server)
+}