72 lines
1.9 KiB
Go
72 lines
1.9 KiB
Go
// Copyright 2017 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package models
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// Follow represents relations of user and his/her followers.
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type Follow struct {
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ID int64 `xorm:"pk autoincr"`
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UserID int64 `xorm:"UNIQUE(follow)"`
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FollowID int64 `xorm:"UNIQUE(follow)"`
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}
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// IsFollowing returns true if user is following followID.
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func IsFollowing(userID, followID int64) bool {
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has, _ := x.Get(&Follow{UserID: userID, FollowID: followID})
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return has
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}
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// FollowUser marks someone be another's follower.
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func FollowUser(userID, followID int64) (err error) {
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if userID == followID || IsFollowing(userID, followID) {
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return nil
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}
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sess := x.NewSession()
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defer sessionRelease(sess)
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if err = sess.Begin(); err != nil {
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return err
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}
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if _, err = sess.Insert(&Follow{UserID: userID, FollowID: followID}); err != nil {
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return err
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}
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if _, err = sess.Exec("UPDATE `user` SET num_followers = num_followers + 1 WHERE id = ?", followID); err != nil {
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return err
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}
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if _, err = sess.Exec("UPDATE `user` SET num_following = num_following + 1 WHERE id = ?", userID); err != nil {
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return err
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}
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return sess.Commit()
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}
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// UnfollowUser unmarks someone as another's follower.
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func UnfollowUser(userID, followID int64) (err error) {
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if userID == followID || !IsFollowing(userID, followID) {
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return nil
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}
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sess := x.NewSession()
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defer sessionRelease(sess)
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if err = sess.Begin(); err != nil {
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return err
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}
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if _, err = sess.Delete(&Follow{UserID: userID, FollowID: followID}); err != nil {
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return err
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}
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if _, err = sess.Exec("UPDATE `user` SET num_followers = num_followers - 1 WHERE id = ?", followID); err != nil {
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return err
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}
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if _, err = sess.Exec("UPDATE `user` SET num_following = num_following - 1 WHERE id = ?", userID); err != nil {
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return err
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}
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return sess.Commit()
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}
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