1 files changed, 209 insertions, 0 deletions
diff --git a/models/git/lfs_lock.go b/models/git/lfs_lock.go
new file mode 100644
index 0000000..07ce7d4
--- /dev/null
+++ b/models/git/lfs_lock.go
@@ -0,0 +1,209 @@
+// Copyright 2017 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package git
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+	"time"
+
+	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/models/perm"
+	access_model "code.gitea.io/gitea/models/perm/access"
+	repo_model "code.gitea.io/gitea/models/repo"
+	"code.gitea.io/gitea/models/unit"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
+)
+
+// LFSLock represents a git lfs lock of repository.
+type LFSLock struct {
+	ID      int64            `xorm:"pk autoincr"`
+	RepoID  int64            `xorm:"INDEX NOT NULL"`
+	OwnerID int64            `xorm:"INDEX NOT NULL"`
+	Owner   *user_model.User `xorm:"-"`
+	Path    string           `xorm:"TEXT"`
+	Created time.Time        `xorm:"created"`
+}
+
+func init() {
+	db.RegisterModel(new(LFSLock))
+}
+
+// BeforeInsert is invoked from XORM before inserting an object of this type.
+func (l *LFSLock) BeforeInsert() {
+	l.Path = util.PathJoinRel(l.Path)
+}
+
+// LoadAttributes loads attributes of the lock.
+func (l *LFSLock) LoadAttributes(ctx context.Context) error {
+	// Load owner
+	if err := l.LoadOwner(ctx); err != nil {
+		return fmt.Errorf("load owner: %w", err)
+	}
+
+	return nil
+}
+
+// LoadOwner loads owner of the lock.
+func (l *LFSLock) LoadOwner(ctx context.Context) error {
+	if l.Owner != nil {
+		return nil
+	}
+
+	owner, err := user_model.GetUserByID(ctx, l.OwnerID)
+	if err != nil {
+		if user_model.IsErrUserNotExist(err) {
+			l.Owner = user_model.NewGhostUser()
+			return nil
+		}
+		return err
+	}
+	l.Owner = owner
+
+	return nil
+}
+
+// CreateLFSLock creates a new lock.
+func CreateLFSLock(ctx context.Context, repo *repo_model.Repository, lock *LFSLock) (*LFSLock, error) {
+	dbCtx, committer, err := db.TxContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	defer committer.Close()
+
+	if err := CheckLFSAccessForRepo(dbCtx, lock.OwnerID, repo, perm.AccessModeWrite); err != nil {
+		return nil, err
+	}
+
+	lock.Path = util.PathJoinRel(lock.Path)
+	lock.RepoID = repo.ID
+
+	l, err := GetLFSLock(dbCtx, repo, lock.Path)
+	if err == nil {
+		return l, ErrLFSLockAlreadyExist{lock.RepoID, lock.Path}
+	}
+	if !IsErrLFSLockNotExist(err) {
+		return nil, err
+	}
+
+	if err := db.Insert(dbCtx, lock); err != nil {
+		return nil, err
+	}
+
+	return lock, committer.Commit()
+}
+
+// GetLFSLock returns release by given path.
+func GetLFSLock(ctx context.Context, repo *repo_model.Repository, path string) (*LFSLock, error) {
+	path = util.PathJoinRel(path)
+	rel := &LFSLock{RepoID: repo.ID}
+	has, err := db.GetEngine(ctx).Where("lower(path) = ?", strings.ToLower(path)).Get(rel)
+	if err != nil {
+		return nil, err
+	}
+	if !has {
+		return nil, ErrLFSLockNotExist{0, repo.ID, path}
+	}
+	return rel, nil
+}
+
+// GetLFSLockByID returns release by given id.
+func GetLFSLockByID(ctx context.Context, id int64) (*LFSLock, error) {
+	lock := new(LFSLock)
+	has, err := db.GetEngine(ctx).ID(id).Get(lock)
+	if err != nil {
+		return nil, err
+	} else if !has {
+		return nil, ErrLFSLockNotExist{id, 0, ""}
+	}
+	return lock, nil
+}
+
+// GetLFSLockByRepoID returns a list of locks of repository.
+func GetLFSLockByRepoID(ctx context.Context, repoID int64, page, pageSize int) (LFSLockList, error) {
+	e := db.GetEngine(ctx)
+	if page >= 0 && pageSize > 0 {
+		start := 0
+		if page > 0 {
+			start = (page - 1) * pageSize
+		}
+		e.Limit(pageSize, start)
+	}
+	lfsLocks := make(LFSLockList, 0, pageSize)
+	return lfsLocks, e.Find(&lfsLocks, &LFSLock{RepoID: repoID})
+}
+
+// GetTreePathLock returns LSF lock for the treePath
+func GetTreePathLock(ctx context.Context, repoID int64, treePath string) (*LFSLock, error) {
+	if !setting.LFS.StartServer {
+		return nil, nil
+	}
+
+	locks, err := GetLFSLockByRepoID(ctx, repoID, 0, 0)
+	if err != nil {
+		return nil, err
+	}
+	for _, lock := range locks {
+		if lock.Path == treePath {
+			return lock, nil
+		}
+	}
+	return nil, nil
+}
+
+// CountLFSLockByRepoID returns a count of all LFSLocks associated with a repository.
+func CountLFSLockByRepoID(ctx context.Context, repoID int64) (int64, error) {
+	return db.GetEngine(ctx).Count(&LFSLock{RepoID: repoID})
+}
+
+// DeleteLFSLockByID deletes a lock by given ID.
+func DeleteLFSLockByID(ctx context.Context, id int64, repo *repo_model.Repository, u *user_model.User, force bool) (*LFSLock, error) {
+	dbCtx, committer, err := db.TxContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+	defer committer.Close()
+
+	lock, err := GetLFSLockByID(dbCtx, id)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := CheckLFSAccessForRepo(dbCtx, u.ID, repo, perm.AccessModeWrite); err != nil {
+		return nil, err
+	}
+
+	if !force && u.ID != lock.OwnerID {
+		return nil, errors.New("user doesn't own lock and force flag is not set")
+	}
+
+	if _, err := db.GetEngine(dbCtx).ID(id).Delete(new(LFSLock)); err != nil {
+		return nil, err
+	}
+
+	return lock, committer.Commit()
+}
+
+// CheckLFSAccessForRepo check needed access mode base on action
+func CheckLFSAccessForRepo(ctx context.Context, ownerID int64, repo *repo_model.Repository, mode perm.AccessMode) error {
+	if ownerID == 0 {
+		return ErrLFSUnauthorizedAction{repo.ID, "undefined", mode}
+	}
+	u, err := user_model.GetUserByID(ctx, ownerID)
+	if err != nil {
+		return err
+	}
+	perm, err := access_model.GetUserRepoPermission(ctx, repo, u)
+	if err != nil {
+		return err
+	}
+	if !perm.CanAccess(mode, unit.TypeCode) {
+		return ErrLFSUnauthorizedAction{repo.ID, u.DisplayName(), mode}
+	}
+	return nil
+}