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forgejo/models/user/follow.go
flynnnnnnnnnn e81ccc406b
Implement FSFE REUSE for golang files (#21840)
Change all license headers to comply with REUSE specification.

Fix #16132

Co-authored-by: flynnnnnnnnnn <flynnnnnnnnnn@github>
Co-authored-by: John Olheiser <john.olheiser@gmail.com>
2022-11-27 18:20:29 +00:00

79 lines
2.1 KiB
Go

// Copyright 2017 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package user
import (
"code.gitea.io/gitea/models/db"
"code.gitea.io/gitea/modules/timeutil"
)
// Follow represents relations of user and their followers.
type Follow struct {
ID int64 `xorm:"pk autoincr"`
UserID int64 `xorm:"UNIQUE(follow)"`
FollowID int64 `xorm:"UNIQUE(follow)"`
CreatedUnix timeutil.TimeStamp `xorm:"INDEX created"`
}
func init() {
db.RegisterModel(new(Follow))
}
// IsFollowing returns true if user is following followID.
func IsFollowing(userID, followID int64) bool {
has, _ := db.GetEngine(db.DefaultContext).Get(&Follow{UserID: userID, FollowID: followID})
return has
}
// FollowUser marks someone be another's follower.
func FollowUser(userID, followID int64) (err error) {
if userID == followID || IsFollowing(userID, followID) {
return nil
}
ctx, committer, err := db.TxContext(db.DefaultContext)
if err != nil {
return err
}
defer committer.Close()
if err = db.Insert(ctx, &Follow{UserID: userID, FollowID: followID}); err != nil {
return err
}
if _, err = db.Exec(ctx, "UPDATE `user` SET num_followers = num_followers + 1 WHERE id = ?", followID); err != nil {
return err
}
if _, err = db.Exec(ctx, "UPDATE `user` SET num_following = num_following + 1 WHERE id = ?", userID); err != nil {
return err
}
return committer.Commit()
}
// UnfollowUser unmarks someone as another's follower.
func UnfollowUser(userID, followID int64) (err error) {
if userID == followID || !IsFollowing(userID, followID) {
return nil
}
ctx, committer, err := db.TxContext(db.DefaultContext)
if err != nil {
return err
}
defer committer.Close()
if _, err = db.DeleteByBean(ctx, &Follow{UserID: userID, FollowID: followID}); err != nil {
return err
}
if _, err = db.Exec(ctx, "UPDATE `user` SET num_followers = num_followers - 1 WHERE id = ?", followID); err != nil {
return err
}
if _, err = db.Exec(ctx, "UPDATE `user` SET num_following = num_following - 1 WHERE id = ?", userID); err != nil {
return err
}
return committer.Commit()
}