refactor ocs

Signed-off-by: Christian Richter <crichter@owncloud.com>

extensions/ocs/pkg/middleware/requireadmin.go

@@ -0,0 +1,42 @@
+package middleware
+
+import (
+	"net/http"
+
+	"github.com/go-chi/render"
+	accounts "github.com/owncloud/ocis/extensions/accounts/pkg/service/v0"
+	"github.com/owncloud/ocis/extensions/ocs/pkg/service/v0/data"
+	"github.com/owncloud/ocis/extensions/ocs/pkg/service/v0/response"
+	"github.com/owncloud/ocis/ocis-pkg/roles"
+)
+
+// RequireAdmin middleware is used to require the user in context to be an admin / have account management permissions
+func RequireAdmin(opts ...Option) func(next http.Handler) http.Handler {
+	opt := newOptions(opts...)
+
+	mustRender := func(w http.ResponseWriter, r *http.Request, renderer render.Renderer) {
+		if err := render.Render(w, r, renderer); err != nil {
+			opt.Logger.Err(err).Msgf("failed to write response for ocs request %s on %s", r.Method, r.URL)
+		}
+	}
+
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+
+			// get roles from context
+			roleIDs, ok := roles.ReadRoleIDsFromContext(r.Context())
+			if !ok {
+				mustRender(w, r, response.ErrRender(data.MetaUnauthorized.StatusCode, "Unauthorized"))
+				return
+			}
+
+			// check if permission is present in roles of the authenticated account
+			if opt.RoleManager.FindPermissionByID(r.Context(), roleIDs, accounts.AccountManagementPermissionID) != nil {
+				next.ServeHTTP(w, r)
+				return
+			}
+
+			mustRender(w, r, response.ErrRender(data.MetaUnauthorized.StatusCode, "Unauthorized"))
+		})
+	}
+}