Rune Harlyk
141 lines
4.9 KiB
C++
141 lines
4.9 KiB
C++
#pragma once
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#include <ArduinoJson.h>
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#include <functional>
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enum message_type_t { CONNECT = 0, DISCONNECT = 1, EVENT = 2, PING = 3, PONG = 4, BINARY_EVENT = 5 };
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typedef std::function<void(JsonVariant &root, int originId)> EventCallback;
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typedef std::function<void(const std::string &originId, bool sync)> SubscribeCallback;
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class CommAdapterBase {
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public:
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CommAdapterBase() { mutex_ = xSemaphoreCreateMutex(); }
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~CommAdapterBase() { vSemaphoreDelete(mutex_); }
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virtual void begin() {}
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bool hasSubscribers(const char *event) { return !client_subscriptions[event].empty(); }
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void onEvent(std::string event, EventCallback callback) { event_callbacks[event].push_back(std::move(callback)); }
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void onSubscribe(std::string event, SubscribeCallback callback) {
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subscribe_callbacks[event].push_back(std::move(callback));
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}
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void emit(const char *event, JsonVariant &payload, const char *originId = "", bool onlyToSameOrigin = false) {
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int originSubscriptionId = originId[0] ? atoi(originId) : -1;
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xSemaphoreTake(mutex_, portMAX_DELAY);
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auto &subscriptions = client_subscriptions[event];
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if (subscriptions.empty()) {
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xSemaphoreGive(mutex_);
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return;
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}
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JsonDocument doc;
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JsonArray array = doc.to<JsonArray>();
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array.add(static_cast<uint8_t>(message_type_t::EVENT));
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array.add(event);
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array.add(payload);
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// TODO: Only send to subscribed
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#if USE_MSGPACK
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std::string bin;
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serializeMsgPack(doc, bin);
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send(reinterpret_cast<const uint8_t *>(bin.data()), bin.size(), -1); // TODO: Make CID dynamic
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#else
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String out;
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serializeJson(doc, out);
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send(out.c_str(), cid);
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#endif
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}
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protected:
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void send(const char *data, int cid = -1) { send(reinterpret_cast<const uint8_t *>(data), strlen(data), cid); }
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virtual void send(const uint8_t *data, size_t len, int cid = -1) = 0;
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void subscribe(const char *event, int cid = 0) { client_subscriptions[event].push_back(cid); }
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void unsubscribe(const char *event, int cid = 0) { client_subscriptions[event].push_back(cid); }
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void handleEventCallbacks(std::string event, JsonVariant &jsonObject, int originId) {
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for (auto &callback : event_callbacks[event]) {
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callback(jsonObject, originId);
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}
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}
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virtual void handleIncoming(const uint8_t *data, size_t len, int cid = 0) {
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JsonDocument doc;
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#if USE_MSGPACK
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DeserializationError error = deserializeMsgPack(doc, data, len);
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#else
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DeserializationError error = deserializeJson(doc, data, len);
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#endif
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if (error) {
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ESP_LOGE("Comm Base", "Failed to deserialize incoming: (%s)", error.c_str());
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return;
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}
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JsonArray obj = doc.as<JsonArray>(); // TODO: Make const
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message_type_t type = static_cast<message_type_t>(obj[0].as<uint8_t>());
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switch (type) {
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case message_type_t::CONNECT: {
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const char *event = obj[1].as<const char *>();
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ESP_LOGI("Comm Base", "CONNECT topic: %s (cid=%d)", event, cid);
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subscribe(event, cid);
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break;
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}
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case message_type_t::DISCONNECT: {
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const char *event = obj[1].as<const char *>();
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ESP_LOGI("Comm Base", "DISCONNECT topic: %s (cid=%d)", event, cid);
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unsubscribe(event, cid);
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break;
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}
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case message_type_t::EVENT: {
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const char *event = obj[1].as<const char *>();
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JsonVariant payload = obj[2].as<JsonVariant>();
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handleEventCallbacks(event, payload, cid);
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break;
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}
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case message_type_t::PING: {
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ESP_LOGI("Comm Base", "PING (cid=%d)", cid);
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#if USE_MSGPACK
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static const uint8_t pong[] = {0x91, 0x04};
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send(pong, sizeof(pong), cid);
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#else
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send("[4]", cid);
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#endif
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break;
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}
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case message_type_t::PONG: ESP_LOGI("Comm Base", "PONG (cid=%d)", cid); break;
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default: ESP_LOGW("Comm Base", "Unknown message type: %d", static_cast<int>(type)); break;
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}
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if (type == PONG) {
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ESP_LOGV("EventSocket", "Pong");
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return;
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} else if (type == PING) {
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ESP_LOGV("EventSocket", "Ping");
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ping(cid);
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return;
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}
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}
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void ping(int cid) {
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#if USE_MSGPACK
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const uint8_t out[] = {0x91, 0x04};
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send(out, sizeof(out), cid);
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#else
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const char *out = "[4]";
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send(out, strlen(out), cid);
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#endif
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}
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SemaphoreHandle_t mutex_;
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std::map<std::string, std::list<int>> client_subscriptions;
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std::map<std::string, std::list<EventCallback>> event_callbacks;
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std::map<std::string, std::list<SubscribeCallback>> subscribe_callbacks;
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}; |