(FIX): Fixed the JWT handling, no need to fail.

We don't need to fail, but we do need a way to know when a user is
logged in. The new domain(server) function IsLoggedIn will do just that!

internal/app/server/middleware.go

@@ -1,10 +1,7 @@
 package server
 
 import (
-	"errors"
 	"fmt"
-	"log"
-	"net/http"
 
 	"github.com/gin-gonic/gin"
 	"github.com/golang-jwt/jwt/v5"
@@ -20,38 +17,20 @@ func DepedencyInjectionMiddleware(deps *domain.InjectedDependencies) gin.Handler
 	}
 }
 
+// JwtAuthMiddleWare handles collection the JWT from the browser's cookies and setting the
+// appropriate data. If the data is not found, this middleware will do effectively nothing, by not
+// setting any values. Protected routes can use this lack of a value as a sign that the user is not
+// logged in and direct the user to login.
 func JwtAuthMiddleWare(jwtSecretKey []byte) gin.HandlerFunc {
 	return func(ctx *gin.Context) {
-		// NOTE: Option One: From auth header
-		//
-		// authHeader := ctx.GetHeader("Authorization")
-		//
-		// if authHeader == "" {
-		// 	ctx.JSON(http.StatusUnauthorized, gin.H{"error": "Authorization required."})
-		// 	ctx.Abort()
-		// 	return
-		// }
-		//
-		// parts := strings.SplitN(authHeader, " ", 2)
-		// if !(len(parts) == 2 && parts[0] == "Bearer") {
-		// 	ctx.JSON(http.StatusUnauthorized, gin.H{"error": "Authorization header must be Bearer token"})
-		// 	ctx.Abort()
-		// 	return
-		// }
-		//
-		// tokenString := parts[1]
-
-		// TODO: How are we handling faliure?
-
+		// JWT cookie not found
 		tokenString, err := ctx.Cookie("jwt_token")
 		if err != nil {
-			ctx.JSON(http.StatusUnauthorized, gin.H{"error": "JWT token cookie not found"})
-			ctx.Abort()
+			ctx.Next()
 			return
 		}
 
 		claims := &domain.JwtClaims{}
-		// token, err := jwt.ParseWithClaims(tokenString, claims, )
 
 		token, err := jwt.ParseWithClaims(tokenString, claims, func(token *jwt.Token) (interface{}, error) {
 			if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
@@ -60,22 +39,29 @@ func JwtAuthMiddleWare(jwtSecretKey []byte) gin.HandlerFunc {
 			return jwtSecretKey, nil
 		})
 
+		// Error occurred when parsing
 		if err != nil {
-			if errors.Is(err, jwt.ErrSignatureInvalid) {
-				ctx.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid token signature"})
-			} else if errors.Is(err, jwt.ErrTokenExpired) || errors.Is(err, jwt.ErrTokenNotValidYet) {
-				ctx.JSON(http.StatusUnauthorized, gin.H{"error": "Token expired or not yet valid"})
-			} else {
-				log.Printf("JWT parsing error: %v", err)
-				ctx.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid token"})
-			}
-			ctx.Abort()
+			ctx.Next()
 			return
 		}
 
+		// NOTE: If we need deeper error handling
+		// if err != nil {
+		// 	if errors.Is(err, jwt.ErrSignatureInvalid) {
+		// 		ctx.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid token signature"})
+		// 	} else if errors.Is(err, jwt.ErrTokenExpired) || errors.Is(err, jwt.ErrTokenNotValidYet) {
+		// 		ctx.JSON(http.StatusUnauthorized, gin.H{"error": "Token expired or not yet valid"})
+		// 	} else {
+		// 		log.Printf("JWT parsing error: %v", err)
+		// 		ctx.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid token"})
+		// 	}
+		// 	ctx.Abort()
+		// 	return
+		// }
+
+		// Token is invalid
 		if !token.Valid {
-			ctx.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid token"})
-			ctx.Abort()
+			ctx.Next()
 			return
 		}
 

internal/app/server/server.go

@@ -135,6 +135,11 @@ func (s *Server) Setup() *Server {
 	// API router endpoints
 	router_api.GET("/", func(ctx *gin.Context) { ctx.JSON(200, gin.H{"message": "Server is active."}) })
 	router_api.GET("/tmp", func(ctx *gin.Context) {
+		if !domain.IsLoggedIn(ctx) {
+			ctx.JSON(200, gin.H{"error": "User is not logged in. Please login to continue"})
+			return
+		}
+
 		userId := ctx.MustGet("userId").(int)
 		userEmail := ctx.MustGet("userEmail").(string)
 

internal/domain/server/server.go

@@ -1,6 +1,7 @@
 package domain
 
 import (
+	"github.com/gin-gonic/gin"
 	"github.com/golang-jwt/jwt/v5"
 	domainAuth "github.com/haydenhargreaves/Potion/internal/domain/auth"
 	domainUser "github.com/haydenhargreaves/Potion/internal/domain/user"
@@ -16,3 +17,10 @@ type JwtClaims struct {
 	Email  string `json:"email"`
 	jwt.RegisteredClaims
 }
+
+// IsLoggedIn checks the cookies in a request and returns whether the user is logged in.
+func IsLoggedIn(ctx *gin.Context) bool {
+	_, id := ctx.Get("userId")
+	_, email := ctx.Get("userEmail")
+	return id && email
+}