overhaul

internal/middleware/middleware.go

@@ -0,0 +1,126 @@
+package middleware
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/golang-jwt/jwt/v5"
+	"github.com/google/uuid"
+)
+
+// Logger middleware
+func Logger() gin.HandlerFunc {
+	return gin.LoggerWithFormatter(func(param gin.LogFormatterParams) string {
+		return fmt.Sprintf("%s - [%s] \"%s %s %s %d %s \"%s\" %s\"\n",
+			param.ClientIP,
+			param.TimeStamp.Format(time.RFC1123),
+			param.Method,
+			param.Path,
+			param.Request.Proto,
+			param.StatusCode,
+			param.Latency,
+			param.Request.UserAgent(),
+			param.ErrorMessage,
+		)
+	})
+}
+
+// Recovery middleware
+func Recovery() gin.HandlerFunc {
+	return gin.Recovery()
+}
+
+// RequestID middleware adds a unique request ID to each request
+func RequestID() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		requestID := c.GetHeader("X-Request-ID")
+		if requestID == "" {
+			requestID = uuid.New().String()
+		}
+		c.Set("request_id", requestID)
+		c.Header("X-Request-ID", requestID)
+		c.Next()
+	}
+}
+
+// Auth middleware for JWT authentication
+func Auth(jwtSecret string) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "Authorization header required"})
+			c.Abort()
+			return
+		}
+
+		bearerToken := strings.Split(authHeader, " ")
+		if len(bearerToken) != 2 || bearerToken[0] != "Bearer" {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid authorization header format"})
+			c.Abort()
+			return
+		}
+
+		tokenString := bearerToken[1]
+		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(jwtSecret), nil
+		})
+
+		if err != nil {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid token"})
+			c.Abort()
+			return
+		}
+
+		if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
+			c.Set("user_id", claims["user_id"])
+			c.Set("email", claims["email"])
+			c.Next()
+		} else {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid token claims"})
+			c.Abort()
+		}
+	}
+}
+
+// ErrorHandler middleware for consistent error handling
+func ErrorHandler() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.Next()
+
+		// Check if there are any errors
+		if len(c.Errors) > 0 {
+			err := c.Errors.Last()
+			log.Printf("Request error: %v", err)
+
+			// Return JSON error response
+			c.JSON(http.StatusInternalServerError, gin.H{
+				"error": "Internal server error",
+				"code":  "INTERNAL_ERROR",
+			})
+		}
+	}
+}
+
+// CORSMiddleware for CORS handling
+func CORSMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.Header("Access-Control-Allow-Origin", "*")
+		c.Header("Access-Control-Allow-Credentials", "true")
+		c.Header("Access-Control-Allow-Headers", "Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, accept, origin, Cache-Control, X-Requested-With")
+		c.Header("Access-Control-Allow-Methods", "POST, OPTIONS, GET, PUT, DELETE")
+
+		if c.Request.Method == "OPTIONS" {
+			c.AbortWithStatus(204)
+			return
+		}
+
+		c.Next()
+	}
+}