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// Copyright 2017 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 migrations

import (
	"github.com/go-xorm/xorm"
)

func removeOrganizationWatchRepo(x *xorm.Engine) error {
	// UserType defines the user type
	type UserType int

	const (
		// UserTypeIndividual defines an individual user
		UserTypeIndividual UserType = iota // Historic reason to make it starts at 0.

		// UserTypeOrganization defines an organization
		UserTypeOrganization
	)

	sess := x.NewSession()
	defer sess.Close()
	if err := sess.Begin(); err != nil {
		return err
	}
	if _, err := sess.Exec("DELETE FROM watch WHERE id IN (SELECT watch.id FROM watch INNER JOIN user ON watch.user_id = user.id WHERE `user`.`type` = ?)", UserTypeOrganization); err != nil {
		return err
	}
	if _, err := sess.Exec("UPDATE `repository` SET num_watches = (SELECT count(*) FROM watch WHERE `repository`.`id` = watch.repo_id)"); err != nil {
		return err
	}

	return sess.Commit()
}