86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
#ifndef Service_h
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#define Service_h
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#if defined(ESP8266)
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#include <ESP8266WiFi.h>
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#include <ESPAsyncTCP.h>
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#elif defined(ESP_PLATFORM)
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#include <WiFi.h>
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#include <AsyncTCP.h>
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#endif
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#include <ESPAsyncWebServer.h>
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#include <ArduinoJson.h>
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#include <AsyncArduinoJson6.h>
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#include <AsyncJsonWebHandler.h>
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/**
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* At the moment, not expecting services to have to deal with large JSON
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* files this could be made configurable fairly simply, it's exposed on
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* AsyncJsonWebHandler with a setter.
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*/
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#define MAX_SETTINGS_SIZE 1024
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/*
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* Abstraction of a service which reads and writes data from an endpoint.
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*
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* Not currently used, but indended for use by features which do not
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* require setting persistance.
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*/
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class SimpleService {
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private:
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AsyncJsonWebHandler _updateHandler;
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void fetchConfig(AsyncWebServerRequest *request) {
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AsyncJsonResponse * response = new AsyncJsonResponse(MAX_SETTINGS_SIZE);
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JsonObject jsonObject = response->getRoot();
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writeToJsonObject(jsonObject);
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response->setLength();
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request->send(response);
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}
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void updateConfig(AsyncWebServerRequest *request, JsonDocument &jsonDocument) {
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if (jsonDocument.is<JsonObject>()) {
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JsonObject newConfig = jsonDocument.as<JsonObject>();
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readFromJsonObject(newConfig);
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// write settings back with a callback to reconfigure the wifi
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AsyncJsonCallbackResponse * response = new AsyncJsonCallbackResponse([this] () {onConfigUpdated();}, MAX_SETTINGS_SIZE);
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JsonObject jsonObject = response->getRoot();
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writeToJsonObject(jsonObject);
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response->setLength();
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request->send(response);
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} else {
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request->send(400);
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}
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}
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protected:
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// reads the local config from the
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virtual void readFromJsonObject(JsonObject& root) {}
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virtual void writeToJsonObject(JsonObject& root) {}
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// implement to perform action when config has been updated
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virtual void onConfigUpdated() {}
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public:
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SimpleService(AsyncWebServer* server, char const* servicePath) {
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server->on(servicePath, HTTP_GET, std::bind(&SimpleService::fetchConfig, this, std::placeholders::_1));
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_updateHandler.setUri(servicePath);
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_updateHandler.setMethod(HTTP_POST);
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_updateHandler.setMaxContentLength(MAX_SETTINGS_SIZE);
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_updateHandler.onRequest(std::bind(&SimpleService::updateConfig, this, std::placeholders::_1, std::placeholders::_2));
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server->addHandler(&_updateHandler);
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}
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virtual ~SimpleService() {}
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};
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#endif // end SimpleService
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