feat: order action per status change

app/actions/orderStatusActions/registry.go

@@ -0,0 +1,85 @@
+package orderStatusActions
+
+import (
+	"log"
+
+	"git.ma-al.com/goc_daniel/b2b/app/model"
+	"git.ma-al.com/goc_daniel/b2b/app/model/enums"
+	"git.ma-al.com/goc_daniel/b2b/app/service/emailService"
+)
+
+var GlobalRegistry = make(ActionRegistry)
+
+type ActionID string
+
+type ActionContext struct {
+	OrderId      uint
+	Order        *model.CustomerOrder
+	UserId       *uint
+	EmailService *emailService.EmailService
+}
+
+type ActionResult struct {
+	Err      error
+	Metadata map[string]any
+}
+
+type OrderAction interface {
+	ID() ActionID
+	Execute(actionCtx ActionContext) ActionResult
+}
+
+type ActionChain []OrderAction
+
+func (c ActionChain) Execute(actionCtx ActionContext) []ActionResult {
+	results := make([]ActionResult, 0, len(c))
+	for _, action := range c {
+		result := action.Execute(actionCtx)
+		results = append(results, result)
+		if result.Err != nil {
+			log.Printf("action %s failed for order %d: %v", action.ID(), actionCtx.OrderId, result.Err)
+		}
+	}
+	return results
+}
+
+type ActionRegistry map[enums.OrderStatus]ActionChain
+
+func (r ActionRegistry) Register(status enums.OrderStatus, chain ActionChain) {
+	r[status] = chain
+}
+
+func (r ActionRegistry) ExecuteForStatus(status enums.OrderStatus, actionCtx ActionContext) []ActionResult {
+	chain, exists := r[status]
+	if !exists {
+		return nil
+	}
+	return chain.Execute(actionCtx)
+}
+
+type ActionFunc func(actionCtx ActionContext) ActionResult
+
+func (f ActionFunc) ID() ActionID {
+	return "anonymous"
+}
+
+func (f ActionFunc) Execute(actionCtx ActionContext) ActionResult {
+	return f(actionCtx)
+}
+
+type actionAdapter struct {
+	id ActionID
+	fn ActionFunc
+}
+
+func (a *actionAdapter) ID() ActionID {
+	return a.id
+}
+
+func (a *actionAdapter) Execute(actionCtx ActionContext) ActionResult {
+	return a.fn(actionCtx)
+}
+
+func WithID(id ActionID, fn ActionFunc) OrderAction {
+	return &actionAdapter{id: id, fn: fn}
+}