added status API endpoint

server/status/domain/status.go

@@ -0,0 +1,28 @@
+package domain
+
+import (
+	"context"
+	"net/http"
+)
+
+type Status struct {
+	Downloading   int `json:"downloading"`
+	Pending       int `json:"pending"`
+	Completed     int `json:"completed"`
+	DownloadSpeed int `json:"download_speed"`
+}
+
+type Repository interface {
+	Pending(ctx context.Context) int
+	Completed(ctx context.Context) int
+	Downloading(ctx context.Context) int
+	DownloadSpeed(ctx context.Context) int64
+}
+
+type Service interface {
+	Status(ctx context.Context) (*Status, error)
+}
+
+type RestHandler interface {
+	Status() http.HandlerFunc
+}