delete user related oauth stuff on user deletion too

Author: 6543

models/auth/oauth2.go

@@ -5,6 +5,7 @@
 package auth
 
 import (
+	"context"
 	"crypto/sha256"
 	"encoding/base32"
 	"encoding/base64"
@@ -18,6 +19,7 @@ import (
 
 	uuid "github.com/google/uuid"
 	"golang.org/x/crypto/bcrypt"
+	"xorm.io/builder"
 	"xorm.io/xorm"
 )
 
@@ -576,3 +578,21 @@ func GetActiveOAuth2SourceByName(name string) (*Source, error) {
 
 	return authSource, nil
 }
+
+func DeleteOAuth2RelictsByUserID(ctx context.Context, userID int64) error {
+	deleteCond := builder.Select("id").From("oauth2_grant").Where(builder.Eq{"oauth2_grant.user_id": userID})
+
+	if _, err := db.GetEngine(ctx).In("grant_id", deleteCond).
+		Delete(&OAuth2AuthorizationCode{}); err != nil {
+		return err
+	}
+
+	if err := db.DeleteBeans(ctx,
+		&OAuth2Application{UID: userID},
+		&OAuth2Grant{UserID: userID},
+	); err != nil {
+		return fmt.Errorf("deleteBeans: %v", err)
+	}
+
+	return nil
+}

models/user.go

@@ -13,6 +13,7 @@ import (
 	_ "image/jpeg" // Needed for jpeg support
 
 	asymkey_model "code.gitea.io/gitea/models/asymkey"
+	auth_model "code.gitea.io/gitea/models/auth"
 	"code.gitea.io/gitea/models/db"
 	"code.gitea.io/gitea/models/issues"
 	"code.gitea.io/gitea/models/organization"
@@ -89,6 +90,10 @@ func DeleteUser(ctx context.Context, u *user_model.User) (err error) {
 		return fmt.Errorf("deleteBeans: %v", err)
 	}
 
+	if err := auth_model.DeleteOAuth2RelictsByUserID(ctx, u.ID); err != nil {
+		return err
+	}
+
 	if setting.Service.UserDeleteWithCommentsMaxTime != 0 &&
 		u.CreatedUnix.AsTime().Add(setting.Service.UserDeleteWithCommentsMaxTime).After(time.Now()) {