Added web api to set limit

include/WebApi_limit.h

@@ -10,6 +10,7 @@ public:
 
 private:
     void onLimitStatus(AsyncWebServerRequest* request);
+    void onLimitPost(AsyncWebServerRequest* request);
 
     AsyncWebServer* _server;
 };

src/WebApi_limit.cpp

@@ -14,6 +14,7 @@ void WebApiLimitClass::init(AsyncWebServer* server)
     _server = server;
 
     _server->on("/api/limit/status", HTTP_GET, std::bind(&WebApiLimitClass::onLimitStatus, this, _1));
+    _server->on("/api/limit/config", HTTP_POST, std::bind(&WebApiLimitClass::onLimitPost, this, _1));
 }
 
 void WebApiLimitClass::loop()
@@ -40,3 +41,72 @@ void WebApiLimitClass::onLimitStatus(AsyncWebServerRequest* request)
     response->setLength();
     request->send(response);
 }
+
+void WebApiLimitClass::onLimitPost(AsyncWebServerRequest* request)
+{
+    AsyncJsonResponse* response = new AsyncJsonResponse();
+    JsonObject retMsg = response->getRoot();
+    retMsg[F("type")] = F("warning");
+
+    if (!request->hasParam("data", true)) {
+        retMsg[F("message")] = F("No values found!");
+        response->setLength();
+        request->send(response);
+        return;
+    }
+
+    String json = request->getParam("data", true)->value();
+
+    if (json.length() > 1024) {
+        retMsg[F("message")] = F("Data too large!");
+        response->setLength();
+        request->send(response);
+        return;
+    }
+
+    DynamicJsonDocument root(1024);
+    DeserializationError error = deserializeJson(root, json);
+
+    if (error) {
+        retMsg[F("message")] = F("Failed to parse data!");
+        response->setLength();
+        request->send(response);
+        return;
+    }
+
+    if (!(root.containsKey("serial")
+            && root.containsKey("limit_value")
+            && root.containsKey("limit_type"))) {
+        retMsg[F("message")] = F("Values are missing!");
+        response->setLength();
+        request->send(response);
+        return;
+    }
+
+    if (root[F("serial")].as<uint64_t>() == 0) {
+        retMsg[F("message")] = F("Serial must be a number > 0!");
+        response->setLength();
+        request->send(response);
+        return;
+    }
+
+    if (root[F("limit_value")].as<uint32_t>() == 0 || root[F("limit_value")].as<uint32_t>() > 1500) {
+        retMsg[F("message")] = F("Limit must between 1 and 1500!");
+        response->setLength();
+        request->send(response);
+        return;
+    }
+
+    uint64_t serial = strtoll(root[F("serial")].as<String>().c_str(), NULL, 16);
+    uint64_t limit = root[F("serial")].as<uint64_t>();
+
+    auto inv = Hoymiles.getInverterBySerial(serial);
+
+    inv->sendActivePowerControlRequest(Hoymiles.getRadio(), limit, PowerLimitControlType::RelativNonPersistent);
+
+    retMsg[F("type")] = F("success");
+    retMsg[F("message")] = F("Settings saved!");
+
+    response->setLength();
+    request->send(response);
+}