Extract Home Assistant discovery logic

lib/ha_discovery/HADiscovery.h

@@ -0,0 +1,27 @@
+#ifndef HA_DISCOVERY_H
+#define HA_DISCOVERY_H
+
+#include "Shade.h"
+#include <ArduinoJson.h>
+#include <functional>
+
+class HADiscovery
+{
+private:
+    char jsonBuffer[1024];
+
+    const char *topic_prefix;
+    const std::function<void(const char*, const char*)> publish_callback;
+
+    void addDeviceObject(JsonDocument &doc, const Shade &shade);
+    void publishCoverDiscoveryTopic(const Shade &shade);
+    void publishBatteryDiscoveryTopic(const Shade &shade);
+    void publishRefreshButtonDiscoveryTopic(const Shade &shade);
+
+public:
+    HADiscovery(const char *topic_prefix, std::function<void(const char* topic, const char* message)> publish_callback);
+
+    void publish(const Shade &shade);
+};
+
+#endif // HA_DISCOVERY_H