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// Copyright 2018 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 (
"code.gitea.io/gitea/modules/setting"
"github.com/go-xorm/xorm"
)
func removeStaleWatches(x *xorm.Engine) error {
type Watch struct {
ID int64
UserID int64
RepoID int64
}
type IssueWatch struct {
ID int64
UserID int64
RepoID int64
IsWatching bool
}
type Repository struct {
ID int64
IsPrivate bool
OwnerID int64
}
type Access struct {
UserID int64
RepoID int64
Mode int
}
const (
// AccessModeNone no access
AccessModeNone int = iota // 0
// AccessModeRead read access
AccessModeRead // 1
)
accessLevel := func(userID int64, repo *Repository) (int, error) {
mode := AccessModeNone
if !repo.IsPrivate {
mode = AccessModeRead
}
if userID == 0 {
return mode, nil
}
if userID == repo.OwnerID {
return 4, nil
}
a := &Access{UserID: userID, RepoID: repo.ID}
if has, err := x.Get(a); !has || err != nil {
return mode, err
}
return a.Mode, nil
}
sess := x.NewSession()
defer sess.Close()
if err := sess.Begin(); err != nil {
return err
}
repoCache := make(map[int64]*Repository)
err := x.BufferSize(setting.IterateBufferSize).Iterate(new(Watch),
func(idx int, bean interface{}) error {
watch := bean.(*Watch)
repo := repoCache[watch.RepoID]
if repo == nil {
repo = &Repository{
ID: watch.RepoID,
}
if _, err := x.Get(repo); err != nil {
return err
}
repoCache[watch.RepoID] = repo
}
// Remove watches from now unaccessible repositories
mode, err := accessLevel(watch.UserID, repo)
if err != nil {
return err
}
has := AccessModeRead <= mode
if has {
return nil
}
if _, err = sess.Delete(&Watch{0, watch.UserID, repo.ID}); err != nil {
return err
}
_, err = sess.Exec("UPDATE `repository` SET num_watches = num_watches - 1 WHERE id = ?", repo.ID)
return err
})
if err != nil {
return err
}
repoCache = make(map[int64]*Repository)
err = x.BufferSize(setting.IterateBufferSize).
Distinct("issue_watch.user_id", "issue.repo_id").
Join("INNER", "issue", "issue_watch.issue_id = issue.id").
Where("issue_watch.is_watching = ?", true).
Iterate(new(IssueWatch),
func(idx int, bean interface{}) error {
watch := bean.(*IssueWatch)
repo := repoCache[watch.RepoID]
if repo == nil {
repo = &Repository{
ID: watch.RepoID,
}
if _, err := x.Get(repo); err != nil {
return err
}
repoCache[watch.RepoID] = repo
}
// Remove issue watches from now unaccssible repositories
mode, err := accessLevel(watch.UserID, repo)
if err != nil {
return err
}
has := AccessModeRead <= mode
if has {
return nil
}
iw := &IssueWatch{
IsWatching: false,
}
_, err = sess.
Join("INNER", "issue", "`issue`.id = `issue_watch`.issue_id AND `issue`.repo_id = ?", watch.RepoID).
Cols("is_watching", "updated_unix").
Where("`issue_watch`.user_id = ?", watch.UserID).
Update(iw)
return err
})
if err != nil {
return err
}
return sess.Commit()
}
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