first commit

include/State.hpp

@@ -0,0 +1,42 @@
+#pragma once
+#include <string>
+#include <vector>
+#include <map>
+#include <deque>
+#include <mutex>
+#include <atomic>
+#include <optional>
+
+struct ScanRecord {
+    std::string ts;
+    std::string url;
+    std::string label;
+    int count = 0;
+    bool changed = false;
+};
+
+// Thread-safe replacement for the python `state` dict. Shared between the
+// SniperEngine worker thread and the Discord bot command handlers.
+class SniperState {
+public:
+    std::atomic<bool> running{false};
+    std::atomic<int> total_scans{0};
+    std::atomic<int> total_changes{0};
+
+    void setLastOffers(const std::string& url, std::vector<std::string> offers);
+    std::optional<std::vector<std::string>> getLastOffers(const std::string& url);
+    std::map<std::string, int> stockCounts();
+
+    void addHistory(ScanRecord rec);
+    std::vector<ScanRecord> getHistory();
+
+    void clearOffers();
+    void resetCounters();
+    void resetHistory();
+
+private:
+    std::mutex mtx_;
+    std::map<std::string, std::vector<std::string>> last_offers_;
+    std::deque<ScanRecord> history_;
+    static constexpr size_t kMaxHistory = 200;
+};