DB migration & timer token

timer.go

@@ -20,16 +20,34 @@ import (
 	"stevenlr.com/timer/view"
 )
 
+func generateRandomString(len int) (string, error) {
+	bin := make([]byte, len)
+	_, err := rand.Read(bin)
+	if err != nil {
+		return "", err
+	}
+	return base64.StdEncoding.EncodeToString(bin), nil
+}
+
+func generateSessionId() (string, error) {
+	return generateRandomString(66)
+}
+
+func generateTimerToken() (string, error) {
+	return generateRandomString(66)
+}
+
 func insertTimer(tx *sql.Tx, name string, seconds int, ownerId model.UUID) error {
 	now := model.MakeTimeNow()
 	end := model.Time(time.Time(now).Add(time.Duration(seconds) * time.Second))
 	id := model.MakeUUID()
+	token, _ := generateTimerToken()
 	_, err := tx.Exec(`
-		INSERT INTO Timer VALUES ($1, $2, $3, $4, $5)`, id, name, now, end, ownerId)
+		INSERT INTO Timer VALUES ($1, $2, $3, $4, $5, $6)`, id, name, now, end, ownerId, token)
 	return err
 }
 
-func initializeDatabase(db *sql.DB) error {
+func initializeDatabaseV1(db *sql.DB) error {
 	tx, err := db.Begin()
 	if err != nil {
 		return err
@@ -48,19 +66,13 @@ func initializeDatabase(db *sql.DB) error {
 			StartTime	TEXT	NOT NULL,
 			EndTime		TEXT	NOT NULL,
 			Owner		BLOB	NOT NULL,
-			PRIMARY KEY (id)
+			Token		TEXT	NOT NULL UNIQUE,
+			PRIMARY KEY (Id)
 		)`)
 	if err != nil {
 		return err
 	}
 
-	userUuidStr := "7015cee7-89a5-4057-b7c9-7e0128ad5086"
-	var userId model.UUID
-	err = userId.Scan(userUuidStr)
-	if err != nil {
-		return err
-	}
-
 	_, err = tx.Exec(`
 		CREATE TABLE User (
 			Id			BLOB	NOT NULL UNIQUE,
@@ -73,14 +85,19 @@ func initializeDatabase(db *sql.DB) error {
 		return err
 	}
 
-	userPasswordClear := "steven"
-
-	password, err := bcrypt.GenerateFromPassword([]byte(userUuidStr+userPasswordClear), bcrypt.MinCost)
+	userName := "admin"
+	userPassword := "admin"
+	salt, err := generateRandomString(33)
 	if err != nil {
 		return err
 	}
 
-	_, err = tx.Exec(`INSERT INTO User VALUES ($1, $2, $3, $4)`, userId, "steven", userUuidStr, password)
+	password, err := bcrypt.GenerateFromPassword([]byte(salt+userPassword), bcrypt.MinCost)
+	if err != nil {
+		return err
+	}
+
+	_, err = tx.Exec(`INSERT INTO User VALUES ($1, $2, $3, $4)`, model.MakeUUID(), userName, salt, password)
 	if err != nil {
 		return err
 	}
@@ -88,6 +105,50 @@ func initializeDatabase(db *sql.DB) error {
 	return tx.Commit()
 }
 
+func migrateDatabaseV2(db *sql.DB) error {
+	tx, err := db.Begin()
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+
+	_, err = tx.Exec(`PRAGMA user_version = 2`)
+	if err != nil {
+		return err
+	}
+
+	_, err = tx.Exec("CREATE INDEX TimerTokenIndex ON Timer(Token)")
+	if err != nil {
+		return err
+	}
+
+	return tx.Commit()
+}
+
+func initializeDatabase(db *sql.DB) error {
+	initialVersion := 0
+	row := db.QueryRow("PRAGMA user_version")
+	row.Scan(&initialVersion)
+
+	if initialVersion < 1 {
+		log.Println("Initializing DB V1")
+		err := initializeDatabaseV1(db)
+		if err != nil {
+			return err
+		}
+	}
+
+	if initialVersion < 2 {
+		log.Println("Migrating DB to V2")
+		err := migrateDatabaseV2(db)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
 func queryAllTimers(db *sql.DB, owner model.UUID) []model.Timer {
 	rows, err := db.Query("SELECT Id, Name FROM Timer WHERE Owner=$1", owner)
 	if err != nil {
@@ -135,10 +196,10 @@ func queryTimer(db *sql.DB, idStr string, userId model.UUID) *model.Timer {
 		return nil
 	}
 
-	row := db.QueryRow("SELECT Id, Name, StartTime, EndTime, Owner FROM Timer WHERE Id=$1 AND Owner=$2", id, userId)
+	row := db.QueryRow("SELECT Id, Name, StartTime, EndTime, Owner, Token FROM Timer WHERE Id=$1 AND Owner=$2", id, userId)
 
 	var t model.Timer
-	if err := row.Scan(&t.Id, &t.Name, &t.StartTime, &t.EndTime, &t.Owner); err == nil {
+	if err := row.Scan(&t.Id, &t.Name, &t.StartTime, &t.EndTime, &t.Owner, &t.Token); err == nil {
 		return &t
 	}
 
@@ -372,15 +433,6 @@ func (server *MyServer) handlePutTimer(w http.ResponseWriter, r *http.Request) {
 	view.TimersList(timers, user != nil).Render(context.Background(), w)
 }
 
-func generateSessionId() (string, error) {
-	bin := make([]byte, 64)
-	_, err := rand.Read(bin)
-	if err != nil {
-		return "", err
-	}
-	return base64.StdEncoding.EncodeToString(bin), nil
-}
-
 func (server *MyServer) handlePostLogin(w http.ResponseWriter, r *http.Request) {
 	if server.findCurrentUser(w, r) != nil {
 		w.Header().Add("HX-Redirect", "/")
@@ -433,7 +485,7 @@ func (server *MyServer) handlePostLogout(w http.ResponseWriter, r *http.Request)
 func main() {
 	log.Println("Starting...")
 
-	db, err := sql.Open("sqlite3", ":memory:")
+	db, err := sql.Open("sqlite3", "file:timer.db")
 	if err != nil {
 		log.Fatalln(err)
 	}