feat: publish standalone worker

Separate worker packaging and service lifecycle from the control plane.

app/models/audited.go

@@ -0,0 +1,63 @@
+// Package models provides GORM models and business logic.
+// Audited models inspired by https://github.com/qor/audited
+package models
+
+import (
+	"gorm.io/gorm"
+)
+
+// AuditedCurrentUserKey is the GORM Set key for the current user.
+const AuditedCurrentUserKey = "audited:current_user"
+
+// Audited tracks creator and updater IDs.
+type Audited struct {
+	CreatorID *int64 `gorm:"type:bigint REFERENCES users(id)" json:"-"`
+	Creator   *User  `json:"-"`
+	UpdaterID *int64 `gorm:"type:bigint REFERENCES users(id)" json:"-"`
+	Updater   *User  `json:"-"`
+}
+
+func getCurrentUser(scope *gorm.DB) (int64, bool) {
+	var user interface{}
+	var hasUser bool
+
+	user, hasUser = scope.Get(AuditedCurrentUserKey)
+
+	// spew.Dump(user, hasUser)
+	if hasUser {
+		return user.(*User).ID, true
+	}
+
+	return 0, false
+}
+
+func assignCreatedBy(tx *gorm.DB) {
+	name := "CreatorID"
+	if field := tx.Statement.Schema.LookUpField(name); field != nil {
+		if user, ok := getCurrentUser(tx); ok {
+			tx.Statement.SetColumn(name, user)
+		}
+	}
+}
+
+func assignUpdatedBy(tx *gorm.DB) {
+	name := "UpdaterID"
+	if field := tx.Statement.Schema.LookUpField(name); field != nil {
+		if user, ok := getCurrentUser(tx); ok {
+			tx.Statement.SetColumn("UpdaterID", user, true)
+		}
+	}
+}
+
+// RegisterCallbacks register callback into GORM DB
+func RegisterCallbacks(db *gorm.DB) {
+	callback := db.Callback()
+
+	if callback.Create().Get("audited:assign_created_by") == nil {
+		_ = callback.Create().After("gorm:before_create").Register("audited:assign_created_by", assignCreatedBy)
+	}
+
+	if callback.Update().Get("audited:assign_updated_by") == nil {
+		_ = callback.Update().After("gorm:before_update").Register("audited:assign_updated_by", assignUpdatedBy)
+	}
+}