Move delete user to service (#22478)

Move delete user to service

Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: Jason Song <i@wolfogre.com>

3 files changed, 51 insertions, 23 deletions

diff --git a/models/db/context.go b/models/db/context.go
index 911dbd1c6f..4b3f7f0ee7 100644
--- a/models/db/context.go
+++ b/models/db/context.go
@@ -7,6 +7,7 @@ import (
 	"context"
 	"database/sql"
 
+	"xorm.io/builder"
 	"xorm.io/xorm"
 	"xorm.io/xorm/schemas"
 )
@@ -183,6 +184,31 @@ func DeleteByBean(ctx context.Context, bean interface{}) (int64, error) {
 	return GetEngine(ctx).Delete(bean)
 }
 
+// DeleteByID deletes the given bean with the given ID
+func DeleteByID(ctx context.Context, id int64, bean interface{}) (int64, error) {
+	return GetEngine(ctx).ID(id).NoAutoTime().Delete(bean)
+}
+
+// FindIDs finds the IDs for the given table name satisfying the given condition
+// By passing a different value than "id" for "idCol", you can query for foreign IDs, i.e. the repo IDs which satisfy the condition
+func FindIDs(ctx context.Context, tableName, idCol string, cond builder.Cond) ([]int64, error) {
+	ids := make([]int64, 0, 10)
+	if err := GetEngine(ctx).Table(tableName).
+		Cols(idCol).
+		Where(cond).
+		Find(&ids); err != nil {
+		return nil, err
+	}
+	return ids, nil
+}
+
+// DecrByIDs decreases the given column for entities of the "bean" type with one of the given ids by one
+// Timestamps of the entities won't be updated
+func DecrByIDs(ctx context.Context, ids []int64, decrCol string, bean interface{}) error {
+	_, err := GetEngine(ctx).Decr(decrCol).In("id", ids).NoAutoCondition().NoAutoTime().Update(bean)
+	return err
+}
+
 // DeleteBeans deletes all given beans, beans should contain delete conditions.
 func DeleteBeans(ctx context.Context, beans ...interface{}) (err error) {
 	e := GetEngine(ctx)
diff --git a/models/user.go b/services/user/delete.go
index 746553c35b..01e3c37b39 100644
--- a/models/user.go
+++ b/services/user/delete.go
@@ -1,8 +1,7 @@
-// Copyright 2014 The Gogs Authors. All rights reserved.
-// Copyright 2019 The Gitea Authors. All rights reserved.
+// Copyright 2023 The Gitea Authors. All rights reserved.
 // SPDX-License-Identifier: MIT
 
-package models
+package user
 
 import (
 	"context"
@@ -23,47 +22,50 @@ import (
 	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/setting"
+
+	"xorm.io/builder"
 )
 
-// DeleteUser deletes models associated to an user.
-func DeleteUser(ctx context.Context, u *user_model.User, purge bool) (err error) {
+// deleteUser deletes models associated to an user.
+func deleteUser(ctx context.Context, u *user_model.User, purge bool) (err error) {
 	e := db.GetEngine(ctx)
 
 	// ***** START: Watch *****
-	watchedRepoIDs := make([]int64, 0, 10)
-	if err = e.Table("watch").Cols("watch.repo_id").
-		Where("watch.user_id = ?", u.ID).And("watch.mode <>?", repo_model.WatchModeDont).Find(&watchedRepoIDs); err != nil {
+	watchedRepoIDs, err := db.FindIDs(ctx, "watch", "watch.repo_id",
+		builder.Eq{"watch.user_id": u.ID}.
+			And(builder.Neq{"watch.mode": repo_model.WatchModeDont}))
+	if err != nil {
 		return fmt.Errorf("get all watches: %w", err)
 	}
-	if _, err = e.Decr("num_watches").In("id", watchedRepoIDs).NoAutoTime().Update(new(repo_model.Repository)); err != nil {
+	if err = db.DecrByIDs(ctx, watchedRepoIDs, "num_watches", new(repo_model.Repository)); err != nil {
 		return fmt.Errorf("decrease repository num_watches: %w", err)
 	}
 	// ***** END: Watch *****
 
 	// ***** START: Star *****
-	starredRepoIDs := make([]int64, 0, 10)
-	if err = e.Table("star").Cols("star.repo_id").
-		Where("star.uid = ?", u.ID).Find(&starredRepoIDs); err != nil {
+	starredRepoIDs, err := db.FindIDs(ctx, "star", "star.repo_id",
+		builder.Eq{"star.uid": u.ID})
+	if err != nil {
 		return fmt.Errorf("get all stars: %w", err)
-	} else if _, err = e.Decr("num_stars").In("id", starredRepoIDs).NoAutoTime().Update(new(repo_model.Repository)); err != nil {
+	} else if err = db.DecrByIDs(ctx, starredRepoIDs, "num_stars", new(repo_model.Repository)); err != nil {
 		return fmt.Errorf("decrease repository num_stars: %w", err)
 	}
 	// ***** END: Star *****
 
 	// ***** START: Follow *****
-	followeeIDs := make([]int64, 0, 10)
-	if err = e.Table("follow").Cols("follow.follow_id").
-		Where("follow.user_id = ?", u.ID).Find(&followeeIDs); err != nil {
+	followeeIDs, err := db.FindIDs(ctx, "follow", "follow.follow_id",
+		builder.Eq{"follow.user_id": u.ID})
+	if err != nil {
 		return fmt.Errorf("get all followees: %w", err)
-	} else if _, err = e.Decr("num_followers").In("id", followeeIDs).Update(new(user_model.User)); err != nil {
+	} else if err = db.DecrByIDs(ctx, followeeIDs, "num_followers", new(user_model.User)); err != nil {
 		return fmt.Errorf("decrease user num_followers: %w", err)
 	}
 
-	followerIDs := make([]int64, 0, 10)
-	if err = e.Table("follow").Cols("follow.user_id").
-		Where("follow.follow_id = ?", u.ID).Find(&followerIDs); err != nil {
+	followerIDs, err := db.FindIDs(ctx, "follow", "follow.user_id",
+		builder.Eq{"follow.follow_id": u.ID})
+	if err != nil {
 		return fmt.Errorf("get all followers: %w", err)
-	} else if _, err = e.Decr("num_following").In("id", followerIDs).Update(new(user_model.User)); err != nil {
+	} else if err = db.DecrByIDs(ctx, followerIDs, "num_following", new(user_model.User)); err != nil {
 		return fmt.Errorf("decrease user num_following: %w", err)
 	}
 	// ***** END: Follow *****
@@ -181,7 +183,7 @@ func DeleteUser(ctx context.Context, u *user_model.User, purge bool) (err error)
 	}
 	// ***** END: ExternalLoginUser *****
 
-	if _, err = e.ID(u.ID).Delete(new(user_model.User)); err != nil {
+	if _, err = db.DeleteByID(ctx, u.ID, new(user_model.User)); err != nil {
 		return fmt.Errorf("delete: %w", err)
 	}
 
diff --git a/services/user/user.go b/services/user/user.go
index c95eb67a85..f0b8fe1c31 100644
--- a/services/user/user.go
+++ b/services/user/user.go
@@ -163,7 +163,7 @@ func DeleteUser(ctx context.Context, u *user_model.User, purge bool) error {
 		return models.ErrUserOwnPackages{UID: u.ID}
 	}
 
-	if err := models.DeleteUser(ctx, u, purge); err != nil {
+	if err := deleteUser(ctx, u, purge); err != nil {
 		return fmt.Errorf("DeleteUser: %w", err)
 	}