// Unsubscribe removes a feed from the user's feed list.
func unsubscribe(c appengine.Context, feedKey *datastore.Key) error {
var f FeedInfo
err := datastore.RunInTransaction(c, func(c appengine.Context) error {
u, err := getUser(c)
if err != nil {
return err
}
i := 0
var k *datastore.Key
for i, k = range u.Feeds {
if feedKey.Equal(k) {
break
}
}
if i >= len(u.Feeds) {
return nil
}
err = fixMissingFieldError(datastore.Get(c, feedKey, &f))
if err != nil {
return err
}
f.Refs--
if f.Refs <= 0 {
if err := f.rmArticles(c); err != nil {
return err
}
if err := datastore.Delete(c, feedKey); err != nil {
return err
}
memcache.Delete(c, articlesMcacheKey(feedKey))
} else if _, err := datastore.Put(c, feedKey, &f); err != nil {
return err
}
u.Feeds = append(u.Feeds[:i], u.Feeds[i+1:]...)
return putUser(c, &u)
}, &datastore.TransactionOptions{XG: true})
if err != nil {
return err
}
flushUserPageCache(c)
if f.Refs <= 0 {
memcache.Delete(c, mcacheFeedsKey)
memcache.Delete(c, feedKey.StringID())
return nil
}
return memcache.Gob.Set(c, &memcache.Item{Key: feedKey.StringID(), Object: f})
}
// Unsubscribe removes a feed from the user's feed list.
func unsubscribe(c appengine.Context, feedKey *datastore.Key) error {
return datastore.RunInTransaction(c, func(c appengine.Context) error {
u, err := getUserInfo(c)
if err != nil {
return err
}
i := 0
var k *datastore.Key
for i, k = range u.Feeds {
if feedKey.Equal(k) {
break
}
}
if i >= len(u.Feeds) {
return nil
}
var f FeedInfo
if err := datastore.Get(c, feedKey, &f); err != nil {
return err
}
f.Refs--
if f.Refs <= 0 {
if err := f.rmArticles(c); err != nil {
return err
}
if err := datastore.Delete(c, feedKey); err != nil {
return err
}
} else if _, err := datastore.Put(c, feedKey, &f); err != nil {
return err
}
u.Feeds = append(u.Feeds[:i], u.Feeds[i+1:]...)
_, err = datastore.Put(c, userInfoKey(c), &u)
return err
}, &datastore.TransactionOptions{XG: true})
}
func (cd ContextDefinition) IsUserOwner(userKey *datastore.Key) bool {
return userKey.Equal(cd.Owner)
}