refactoring

Co-authored-by: n.fedorov <mail@nfedorov.dev>
Co-committed-by: n.fedorov <mail@nfedorov.dev>

include/nxst/domain/transfer_state.hpp

@@ -0,0 +1,42 @@
+#pragma once
+#include <atomic>
+#include <mutex>
+#include <string>
+
+struct TransferState {
+    std::atomic<bool> done{false};
+    std::atomic<bool> cancelled{false};
+    std::atomic<bool> connection_failed{false};
+    std::atomic<uint64_t> bytes_done{0};
+    std::atomic<uint64_t> bytes_total{0};
+
+    std::string status;
+    std::string fail_reason;
+    mutable std::mutex status_mutex;
+
+    void reset() {
+        done = false;
+        cancelled = false;
+        connection_failed = false;
+        bytes_done = 0;
+        bytes_total = 0;
+        fail_reason.clear();
+        std::lock_guard<std::mutex> lock(status_mutex);
+        status.clear();
+    }
+
+    double progress() const {
+        uint64_t t = bytes_total.load();
+        return t ? (double)bytes_done.load() / (double)t * 100.0 : 0.0;
+    }
+
+    std::string getStatus() const {
+        std::lock_guard<std::mutex> lock(status_mutex);
+        return status;
+    }
+
+    void setStatus(const std::string& s) {
+        std::lock_guard<std::mutex> lock(status_mutex);
+        status = s;
+    }
+};