Move webhook into models/webhook/ (#17579)

models/db/error.go

@@ -0,0 +1,29 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package db
+
+import "fmt"
+
+// ErrCancelled represents an error due to context cancellation
+type ErrCancelled struct {
+	Message string
+}
+
+// IsErrCancelled checks if an error is a ErrCancelled.
+func IsErrCancelled(err error) bool {
+	_, ok := err.(ErrCancelled)
+	return ok
+}
+
+func (err ErrCancelled) Error() string {
+	return "Cancelled: " + err.Message
+}
+
+// ErrCancelledf returns an ErrCancelled for the provided format and args
+func ErrCancelledf(format string, args ...interface{}) error {
+	return ErrCancelled{
+		fmt.Sprintf(format, args...),
+	}
+}