Rewrite api to Go

pkg/middleware/auth.go

@@ -0,0 +1,63 @@
+package middleware
+
+import (
+	"context"
+	"net/http"
+	"strings"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+type contextKey string
+
+const UserIDKey contextKey = "userID"
+
+func JWTAuth(secret string) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			authHeader := r.Header.Get("Authorization")
+			if authHeader == "" {
+				http.Error(w, "Authorization header required", http.StatusUnauthorized)
+				return
+			}
+
+			tokenString := strings.TrimPrefix(authHeader, "Bearer ")
+			if tokenString == authHeader {
+				http.Error(w, "Bearer token required", http.StatusUnauthorized)
+				return
+			}
+
+			token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
+				if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
+					return nil, jwt.ErrSignatureInvalid
+				}
+				return []byte(secret), nil
+			})
+
+			if err != nil || !token.Valid {
+				http.Error(w, "Invalid token", http.StatusUnauthorized)
+				return
+			}
+
+			claims, ok := token.Claims.(jwt.MapClaims)
+			if !ok {
+				http.Error(w, "Invalid token claims", http.StatusUnauthorized)
+				return
+			}
+
+			userID, ok := claims["user_id"].(string)
+			if !ok {
+				http.Error(w, "Invalid user ID in token", http.StatusUnauthorized)
+				return
+			}
+
+			ctx := context.WithValue(r.Context(), UserIDKey, userID)
+			next.ServeHTTP(w, r.WithContext(ctx))
+		})
+	}
+}
+
+func GetUserIDFromContext(ctx context.Context) (string, bool) {
+	userID, ok := ctx.Value(UserIDKey).(string)
+	return userID, ok
+}