mirror of
https://github.com/go-gitea/gitea
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78 lines
2.2 KiB
Go
78 lines
2.2 KiB
Go
// Copyright 2017 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package user
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import (
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"context"
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"code.gitea.io/gitea/models/db"
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"code.gitea.io/gitea/modules/timeutil"
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)
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// Follow represents relations of user and their 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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CreatedUnix timeutil.TimeStamp `xorm:"INDEX created"`
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}
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func init() {
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db.RegisterModel(new(Follow))
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}
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// IsFollowing returns true if user is following followID.
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func IsFollowing(ctx context.Context, userID, followID int64) bool {
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has, _ := db.GetEngine(ctx).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(ctx context.Context, user, follow *User) (err error) {
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if user.ID == follow.ID || IsFollowing(ctx, user.ID, follow.ID) {
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return nil
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}
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if IsUserBlockedBy(ctx, user, follow.ID) || IsUserBlockedBy(ctx, follow, user.ID) {
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return ErrBlockedUser
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}
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return db.WithTx(ctx, func(ctx context.Context) error {
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if err = db.Insert(ctx, &Follow{UserID: user.ID, FollowID: follow.ID}); err != nil {
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return err
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}
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if _, err = db.Exec(ctx, "UPDATE `user` SET num_followers = num_followers + 1 WHERE id = ?", follow.ID); err != nil {
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return err
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}
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if _, err = db.Exec(ctx, "UPDATE `user` SET num_following = num_following + 1 WHERE id = ?", user.ID); err != nil {
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return err
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}
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return nil
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})
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}
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// UnfollowUser unmarks someone as another's follower.
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func UnfollowUser(ctx context.Context, userID, followID int64) (err error) {
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if userID == followID || !IsFollowing(ctx, userID, followID) {
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return nil
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}
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return db.WithTx(ctx, func(ctx context.Context) error {
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if _, err = db.DeleteByBean(ctx, &Follow{UserID: userID, FollowID: followID}); err != nil {
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return err
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}
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if _, err = db.Exec(ctx, "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 = db.Exec(ctx, "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 nil
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})
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}
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