From b63dff90e69e746d7c3fd5a7ce886d89895ec39e Mon Sep 17 00:00:00 2001
From: Arda Serdar Pektezol <1669855+pektezol@users.noreply.github.com>
Date: Thu, 27 Oct 2022 15:19:48 +0300
Subject: change middleware directory

---
 backend/middleware/auth.go | 56 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 backend/middleware/auth.go

(limited to 'backend/middleware/auth.go')

diff --git a/backend/middleware/auth.go b/backend/middleware/auth.go
new file mode 100644
index 0000000..ccd9c22
--- /dev/null
+++ b/backend/middleware/auth.go
@@ -0,0 +1,56 @@
+package middleware
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/golang-jwt/jwt/v4"
+	"github.com/pektezol/leastportals/backend/database"
+	"github.com/pektezol/leastportals/backend/models"
+)
+
+func RequireAuth(c *gin.Context) {
+	// Get auth cookie
+	tokenString, err := c.Cookie("auth")
+	if err != nil {
+		log.Println("RequireAuth: Err getting cookie")
+		c.AbortWithStatus(http.StatusUnauthorized)
+		return
+	}
+	// Validate token
+	token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
+		if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
+			return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
+		}
+		return []byte(os.Getenv("SECRET_KEY")), nil
+	})
+	if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
+		// Check exp
+		if float64(time.Now().Unix()) > claims["exp"].(float64) {
+			log.Println("RequireAuth: Token expired")
+			c.AbortWithStatus(http.StatusUnauthorized) // Expired
+			return
+		}
+		// Get user from DB
+		var user models.User
+		database.DB.QueryRow(`SELECT * FROM users WHERE steam_id = $1;`, claims["sub"]).Scan(
+			&user.SteamID, &user.Username, &user.AvatarLink, &user.CountryCode,
+			&user.CreatedAt, &user.UpdatedAt, &user.UserType)
+		if user.SteamID == 0 {
+			log.Println("RequireAuth: No user found on database")
+			c.AbortWithStatus(http.StatusUnauthorized)
+			return
+		}
+		// Attach user to request
+		c.Set("user", user)
+		c.Next()
+	} else {
+		log.Println("RequireAuth: Invalid token")
+		c.AbortWithStatus(http.StatusUnauthorized)
+		return
+	}
+}
-- 
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