1 files changed, 105 insertions, 0 deletions
diff --git a/models/actions/tasks_version.go b/models/actions/tasks_version.go
new file mode 100644
index 0000000..d8df353
--- /dev/null
+++ b/models/actions/tasks_version.go
@@ -0,0 +1,105 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package actions
+
+import (
+	"context"
+
+	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/timeutil"
+)
+
+// ActionTasksVersion
+// If both ownerID and repoID is zero, its scope is global.
+// If ownerID is not zero and repoID is zero, its scope is org (there is no user-level runner currently).
+// If ownerID is zero and repoID is not zero, its scope is repo.
+type ActionTasksVersion struct {
+	ID          int64 `xorm:"pk autoincr"`
+	OwnerID     int64 `xorm:"UNIQUE(owner_repo)"`
+	RepoID      int64 `xorm:"INDEX UNIQUE(owner_repo)"`
+	Version     int64
+	CreatedUnix timeutil.TimeStamp `xorm:"created"`
+	UpdatedUnix timeutil.TimeStamp `xorm:"updated"`
+}
+
+func init() {
+	db.RegisterModel(new(ActionTasksVersion))
+}
+
+func GetTasksVersionByScope(ctx context.Context, ownerID, repoID int64) (int64, error) {
+	var tasksVersion ActionTasksVersion
+	has, err := db.GetEngine(ctx).Where("owner_id = ? AND repo_id = ?", ownerID, repoID).Get(&tasksVersion)
+	if err != nil {
+		return 0, err
+	} else if !has {
+		return 0, nil
+	}
+	return tasksVersion.Version, err
+}
+
+func insertTasksVersion(ctx context.Context, ownerID, repoID int64) (*ActionTasksVersion, error) {
+	tasksVersion := &ActionTasksVersion{
+		OwnerID: ownerID,
+		RepoID:  repoID,
+		Version: 1,
+	}
+	if _, err := db.GetEngine(ctx).Insert(tasksVersion); err != nil {
+		return nil, err
+	}
+	return tasksVersion, nil
+}
+
+func increaseTasksVersionByScope(ctx context.Context, ownerID, repoID int64) error {
+	result, err := db.GetEngine(ctx).Exec("UPDATE action_tasks_version SET version = version + 1 WHERE owner_id = ? AND repo_id = ?", ownerID, repoID)
+	if err != nil {
+		return err
+	}
+	affected, err := result.RowsAffected()
+	if err != nil {
+		return err
+	}
+
+	if affected == 0 {
+		// if update sql does not affect any rows, the database may be broken,
+		// so re-insert the row of version data here.
+		if _, err := insertTasksVersion(ctx, ownerID, repoID); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func IncreaseTaskVersion(ctx context.Context, ownerID, repoID int64) error {
+	ctx, commiter, err := db.TxContext(ctx)
+	if err != nil {
+		return err
+	}
+	defer commiter.Close()
+
+	// 1. increase global
+	if err := increaseTasksVersionByScope(ctx, 0, 0); err != nil {
+		log.Error("IncreaseTasksVersionByScope(Global): %v", err)
+		return err
+	}
+
+	// 2. increase owner
+	if ownerID > 0 {
+		if err := increaseTasksVersionByScope(ctx, ownerID, 0); err != nil {
+			log.Error("IncreaseTasksVersionByScope(Owner): %v", err)
+			return err
+		}
+	}
+
+	// 3. increase repo
+	if repoID > 0 {
+		if err := increaseTasksVersionByScope(ctx, 0, repoID); err != nil {
+			log.Error("IncreaseTasksVersionByScope(Repo): %v", err)
+			return err
+		}
+	}
+
+	return commiter.Commit()
+}