refactor auth pkg into libraries

auth/authorizer.go

@@ -1,31 +0,0 @@
-package auth
-
-import (
-	"net/http"
-
-	"github.com/go-chi/render"
-)
-
-// RequiresRole middleware restricts access to accounts having role parameter in their jwt claims.
-func RequiresRole(role string) func(next http.Handler) http.Handler {
-	return func(next http.Handler) http.Handler {
-		hfn := func(w http.ResponseWriter, r *http.Request) {
-			claims := ClaimsFromCtx(r.Context())
-			if !hasRole(role, claims.Roles) {
-				render.Render(w, r, ErrForbidden)
-				return
-			}
-			next.ServeHTTP(w, r)
-		}
-		return http.HandlerFunc(hfn)
-	}
-}
-
-func hasRole(role string, roles []string) bool {
-	for _, r := range roles {
-		if r == role {
-			return true
-		}
-	}
-	return false
-}