1 files changed, 185 insertions, 0 deletions
diff --git a/models/repo_transfer.go b/models/repo_transfer.go
new file mode 100644
index 00000000..0c23d759
--- /dev/null
+++ b/models/repo_transfer.go
@@ -0,0 +1,185 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package models
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/models/organization"
+	repo_model "code.gitea.io/gitea/models/repo"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/timeutil"
+)
+
+// RepoTransfer is used to manage repository transfers
+type RepoTransfer struct {
+	ID          int64 `xorm:"pk autoincr"`
+	DoerID      int64
+	Doer        *user_model.User `xorm:"-"`
+	RecipientID int64
+	Recipient   *user_model.User `xorm:"-"`
+	RepoID      int64
+	TeamIDs     []int64
+	Teams       []*organization.Team `xorm:"-"`
+
+	CreatedUnix timeutil.TimeStamp `xorm:"INDEX NOT NULL created"`
+	UpdatedUnix timeutil.TimeStamp `xorm:"INDEX NOT NULL updated"`
+}
+
+func init() {
+	db.RegisterModel(new(RepoTransfer))
+}
+
+// LoadAttributes fetches the transfer recipient from the database
+func (r *RepoTransfer) LoadAttributes(ctx context.Context) error {
+	if r.Recipient == nil {
+		u, err := user_model.GetUserByID(ctx, r.RecipientID)
+		if err != nil {
+			return err
+		}
+
+		r.Recipient = u
+	}
+
+	if r.Recipient.IsOrganization() && len(r.TeamIDs) != len(r.Teams) {
+		for _, v := range r.TeamIDs {
+			team, err := organization.GetTeamByID(ctx, v)
+			if err != nil {
+				return err
+			}
+
+			if team.OrgID != r.Recipient.ID {
+				return fmt.Errorf("team %d belongs not to org %d", v, r.Recipient.ID)
+			}
+
+			r.Teams = append(r.Teams, team)
+		}
+	}
+
+	if r.Doer == nil {
+		u, err := user_model.GetUserByID(ctx, r.DoerID)
+		if err != nil {
+			return err
+		}
+
+		r.Doer = u
+	}
+
+	return nil
+}
+
+// CanUserAcceptTransfer checks if the user has the rights to accept/decline a repo transfer.
+// For user, it checks if it's himself
+// For organizations, it checks if the user is able to create repos
+func (r *RepoTransfer) CanUserAcceptTransfer(ctx context.Context, u *user_model.User) bool {
+	if err := r.LoadAttributes(ctx); err != nil {
+		log.Error("LoadAttributes: %v", err)
+		return false
+	}
+
+	if !r.Recipient.IsOrganization() {
+		return r.RecipientID == u.ID
+	}
+
+	allowed, err := organization.CanCreateOrgRepo(ctx, r.RecipientID, u.ID)
+	if err != nil {
+		log.Error("CanCreateOrgRepo: %v", err)
+		return false
+	}
+
+	return allowed
+}
+
+// GetPendingRepositoryTransfer fetches the most recent and ongoing transfer
+// process for the repository
+func GetPendingRepositoryTransfer(ctx context.Context, repo *repo_model.Repository) (*RepoTransfer, error) {
+	transfer := new(RepoTransfer)
+
+	has, err := db.GetEngine(ctx).Where("repo_id = ? ", repo.ID).Get(transfer)
+	if err != nil {
+		return nil, err
+	}
+
+	if !has {
+		return nil, ErrNoPendingRepoTransfer{RepoID: repo.ID}
+	}
+
+	return transfer, nil
+}
+
+func DeleteRepositoryTransfer(ctx context.Context, repoID int64) error {
+	_, err := db.GetEngine(ctx).Where("repo_id = ?", repoID).Delete(&RepoTransfer{})
+	return err
+}
+
+// TestRepositoryReadyForTransfer make sure repo is ready to transfer
+func TestRepositoryReadyForTransfer(status repo_model.RepositoryStatus) error {
+	switch status {
+	case repo_model.RepositoryBeingMigrated:
+		return errors.New("repo is not ready, currently migrating")
+	case repo_model.RepositoryPendingTransfer:
+		return ErrRepoTransferInProgress{}
+	}
+	return nil
+}
+
+// CreatePendingRepositoryTransfer transfer a repo from one owner to a new one.
+// it marks the repository transfer as "pending"
+func CreatePendingRepositoryTransfer(ctx context.Context, doer, newOwner *user_model.User, repoID int64, teams []*organization.Team) error {
+	return db.WithTx(ctx, func(ctx context.Context) error {
+		repo, err := repo_model.GetRepositoryByID(ctx, repoID)
+		if err != nil {
+			return err
+		}
+
+		// Make sure repo is ready to transfer
+		if err := TestRepositoryReadyForTransfer(repo.Status); err != nil {
+			return err
+		}
+
+		repo.Status = repo_model.RepositoryPendingTransfer
+		if err := repo_model.UpdateRepositoryCols(ctx, repo, "status"); err != nil {
+			return err
+		}
+
+		// Check if new owner has repository with same name.
+		if has, err := repo_model.IsRepositoryModelExist(ctx, newOwner, repo.Name); err != nil {
+			return fmt.Errorf("IsRepositoryExist: %w", err)
+		} else if has {
+			return repo_model.ErrRepoAlreadyExist{
+				Uname: newOwner.LowerName,
+				Name:  repo.Name,
+			}
+		}
+
+		transfer := &RepoTransfer{
+			RepoID:      repo.ID,
+			RecipientID: newOwner.ID,
+			CreatedUnix: timeutil.TimeStampNow(),
+			UpdatedUnix: timeutil.TimeStampNow(),
+			DoerID:      doer.ID,
+			TeamIDs:     make([]int64, 0, len(teams)),
+		}
+
+		for k := range teams {
+			transfer.TeamIDs = append(transfer.TeamIDs, teams[k].ID)
+		}
+
+		return db.Insert(ctx, transfer)
+	})
+}
+
+// GetPendingTransfers returns the pending transfers of recipient which were sent by by doer.
+func GetPendingTransferIDs(ctx context.Context, reciepientID, doerID int64) ([]int64, error) {
+	pendingTransferIDs := make([]int64, 0, 8)
+	return pendingTransferIDs, db.GetEngine(ctx).Table("repo_transfer").
+		Where("doer_id = ?", doerID).
+		And("recipient_id = ?", reciepientID).
+		Cols("id").
+		Find(&pendingTransferIDs)
+}