Refactor router and middleware packages

- Move middleware functions from `main.go` to `middleware.go` in the `middleware` package.
- Update import statements in `main.go` and use the `router` package instead of the `controllers` package.

```
Refactor router and middleware packages

Move middleware functions from `main.go` to `middleware.go` in the `middleware` package. Update import statements in `main.go` and use the `router` package instead of the `controllers` package.
```

1 files changed, 55 insertions, 0 deletions

diff --git a/api/internal/middleware/middleware.go b/api/internal/middleware/middleware.go
new file mode 100644
index 0000000..819f1e5
--- /dev/null
+++ b/api/internal/middleware/middleware.go
@@ -0,0 +1,55 @@
+package middleware
+
+import (
+        "errors"
+        "github.com/gin-gonic/gin"
+        "log"
+        "net/http"
+        "strings"
+)
+
+func TokenRequired() gin.HandlerFunc {
+        return func(c *gin.Context) {
+                _, err := checkForTokenInContext(c)
+
+                if err != nil {
+                        c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
+                        c.Abort()
+                        return
+                }
+
+                c.Next()
+        }
+}
+
+func CORSMiddleware() gin.HandlerFunc {
+        return func(c *gin.Context) {
+                c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
+                c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
+                c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, accept, origin, Cache-Control, X-Requested-With")
+                c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS, GET, PUT")
+
+                if c.Request.Method == "OPTIONS" {
+                        log.Println(c.Request.Header)
+                        c.AbortWithStatus(http.StatusNoContent)
+                        return
+                }
+
+                c.Next()
+        }
+}
+
+func checkForTokenInContext(c *gin.Context) (string, error) {
+        authorizationHeader := c.GetHeader("Authorization")
+        if authorizationHeader == "" {
+                return "", errors.New("authorization header is missing")
+        }
+
+        parts := strings.Split(authorizationHeader, " ")
+
+        if len(parts) != 2 || parts[0] != "Bearer" {
+                return "", errors.New("invalid Authorization header format")
+        }
+
+        return parts[1], nil
+}
\ No newline at end of file