feat: add asynq worker skeleton

worker/internal/tasks/dummy.go

@@ -0,0 +1,46 @@
+package tasks
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"log/slog"
+
+	"github.com/hibiken/asynq"
+)
+
+const TypeDummy = "proxui.dummy"
+
+type DummyPayload struct {
+	Message string `json:"message"`
+}
+
+func NewDummyTask(message string) (*asynq.Task, error) {
+	payload, err := json.Marshal(DummyPayload{Message: message})
+	if err != nil {
+		return nil, err
+	}
+
+	return asynq.NewTask(TypeDummy, payload), nil
+}
+
+type DummyHandler struct {
+	logger *slog.Logger
+}
+
+func NewDummyHandler(logger *slog.Logger) DummyHandler {
+	return DummyHandler{logger: logger}
+}
+
+func (h DummyHandler) ProcessTask(_ context.Context, task *asynq.Task) error {
+	var payload DummyPayload
+	if err := json.Unmarshal(task.Payload(), &payload); err != nil {
+		return fmt.Errorf("decode dummy payload: %w", err)
+	}
+	if payload.Message == "" {
+		return fmt.Errorf("dummy message is required")
+	}
+
+	h.logger.Info("processed dummy job", "message", payload.Message)
+	return nil
+}

worker/internal/tasks/dummy_test.go

@@ -0,0 +1,37 @@
+package tasks
+
+import (
+	"context"
+	"log/slog"
+	"testing"
+
+	"github.com/hibiken/asynq"
+)
+
+func TestDummyHandlerProcessesValidTask(t *testing.T) {
+	task, err := NewDummyTask("hello-worker")
+	if err != nil {
+		t.Fatalf("NewDummyTask() error = %v", err)
+	}
+
+	handler := NewDummyHandler(slog.Default())
+	if err := handler.ProcessTask(context.Background(), task); err != nil {
+		t.Fatalf("ProcessTask() error = %v", err)
+	}
+}
+
+func TestDummyHandlerRejectsInvalidPayload(t *testing.T) {
+	handler := NewDummyHandler(slog.Default())
+	err := handler.ProcessTask(context.Background(), asynq.NewTask(TypeDummy, []byte(`{`)))
+	if err == nil {
+		t.Fatal("ProcessTask() error = nil, want error")
+	}
+}
+
+func TestDummyHandlerRejectsMissingMessage(t *testing.T) {
+	handler := NewDummyHandler(slog.Default())
+	err := handler.ProcessTask(context.Background(), asynq.NewTask(TypeDummy, []byte(`{"message":""}`)))
+	if err == nil {
+		t.Fatal("ProcessTask() error = nil, want error")
+	}
+}