#1067: Deleting users should remove them from collaborator lists

- fix delete user but repository watches are not decreased

models/error.go

@@ -8,6 +8,59 @@ import (
 	"fmt"
 )
 
+//  ____ ___
+// |    |   \______ ___________
+// |    |   /  ___// __ \_  __ \
+// |    |  /\___ \\  ___/|  | \/
+// |______//____  >\___  >__|
+//              \/     \/
+
+type ErrUserOwnRepos struct {
+	UID int64
+}
+
+func IsErrUserOwnRepos(err error) bool {
+	_, ok := err.(ErrUserOwnRepos)
+	return ok
+}
+
+func (err ErrUserOwnRepos) Error() string {
+	return fmt.Sprintf("user still has ownership of repositories: [uid: %d]", err.UID)
+}
+
+type ErrUserHasOrgs struct {
+	UID int64
+}
+
+func IsErrUserHasOrgs(err error) bool {
+	_, ok := err.(ErrUserHasOrgs)
+	return ok
+}
+
+func (err ErrUserHasOrgs) Error() string {
+	return fmt.Sprintf("user still has membership of organizations: [uid: %d]", err.UID)
+}
+
+// ________                            .__                __  .__
+// \_____  \_______  _________    ____ |__|____________ _/  |_|__| ____   ____
+//  /   |   \_  __ \/ ___\__  \  /    \|  \___   /\__  \\   __\  |/  _ \ /    \
+// /    |    \  | \/ /_/  > __ \|   |  \  |/    /  / __ \|  | |  (  <_> )   |  \
+// \_______  /__|  \___  (____  /___|  /__/_____ \(____  /__| |__|\____/|___|  /
+//         \/     /_____/     \/     \/         \/     \/                    \/
+
+type ErrLastOrgOwner struct {
+	UID int64
+}
+
+func IsErrLastOrgOwner(err error) bool {
+	_, ok := err.(ErrLastOrgOwner)
+	return ok
+}
+
+func (err ErrLastOrgOwner) Error() string {
+	return fmt.Sprintf("user is the last member of owner team: [uid: %d]", err.UID)
+}
+
 // __________                           .__  __
 // \______   \ ____ ______   ____  _____|__|/  |_  ___________ ___.__.
 //  |       _// __ \\____ \ /  _ \/  ___/  \   __\/  _ \_  __ <   |  |