🚌 Adds eventbus with bluetooth adapter

2025-07-08 01:25:35 +02:00
parent 01d46f283b
commit 06b05b2dc1
12 changed files with 532 additions and 1 deletions
@@ -0,0 +1,63 @@
+#pragma once
+#include <ArduinoJson.h>
+#include <array>
+#include <bitset>
+#include <freertos/FreeRTOS.h>
+#include "topic.hpp"
+
+#ifndef MAX_CID
+#define MAX_CID 4
+#endif
+
+enum class MsgKind : uint8_t { Connect = 0, Disconnect = 1, Event = 2, Ping = 3, Pong = 4 };
+
+template <size_t MaxCid = MAX_CID, size_t NTopics = static_cast<size_t>(Topic::COUNT)>
+class CommBase {
+    using Bits = std::bitset<MaxCid>;
+    std::array<Bits, NTopics> subs_;
+    portMUX_TYPE mux_ portMUX_INITIALIZER_UNLOCKED;
+
+    static constexpr size_t idx(Topic t) { return static_cast<size_t>(t); }
+
+    template <Topic T>
+    void encode(JsonDocument& d, const typename TopicTraits<T>::Msg& m) {
+        auto a = d.to<JsonArray>();
+        a.add(static_cast<uint8_t>(MsgKind::Event));
+        a.add(static_cast<uint8_t>(T));
+        toJson(a.add<JsonVariant>(), m);
+    }
+
+  protected:
+    virtual void send(size_t cid, const char* data, size_t len) = 0;
+
+  public:
+    void subscribe(Topic t, size_t cid) {
+        portENTER_CRITICAL(&mux_);
+        subs_[idx(t)].set(cid);
+        portEXIT_CRITICAL(&mux_);
+    }
+
+    void unsubscribe(Topic t, size_t cid) {
+        portENTER_CRITICAL(&mux_);
+        subs_[idx(t)].reset(cid);
+        portEXIT_CRITICAL(&mux_);
+    }
+
+    bool has(Topic t) const { return subs_[idx(t)].any(); }
+
+    template <Topic T>
+    void emit(const typename TopicTraits<T>::Msg& m) {
+        if (!has(T)) return;
+        JsonDocument doc;
+        encode<T>(doc, m);
+        String out;
+#if USE_MSGPACK
+        serializeMsgPack(doc, out);
+#else
+        serializeJson(doc, out);
+#endif
+        auto& b = subs_[idx(T)];
+        for (size_t cid = 0; cid < MaxCid; ++cid)
+            if (b.test(cid)) send(cid, out.c_str(), out.length());
+    }
+};