esp8266-react-framework/src/SettingsService.h

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#ifndef SettingsService_h
#define SettingsService_h
#if defined(ESP8266)
#include <ESP8266WiFi.h>
#include <ESPAsyncTCP.h>
#elif defined(ESP_PLATFORM)
#include <WiFi.h>
#include <AsyncTCP.h>
#endif
#include <SettingsPersistence.h>
#include <ESPAsyncWebServer.h>
#include <ArduinoJson.h>
#include <AsyncJsonRequestWebHandler.h>
#include <AsyncArduinoJson6.h>
/*
* Abstraction of a service which stores it's settings as JSON in a file system.
*/
class SettingsService : public SettingsPersistence {
private:
AsyncJsonRequestWebHandler _updateHandler;
void fetchConfig(AsyncWebServerRequest *request){
AsyncJsonResponse * response = new AsyncJsonResponse(MAX_SETTINGS_SIZE);
JsonObject jsonObject = response->getRoot();
writeToJsonObject(jsonObject);
response->setLength();
request->send(response);
}
void updateConfig(AsyncWebServerRequest *request, JsonDocument &jsonDocument){
if (jsonDocument.is<JsonObject>()){
JsonObject newConfig = jsonDocument.as<JsonObject>();
readFromJsonObject(newConfig);
writeToFS();
// write settings back with a callback to reconfigure the wifi
AsyncJsonCallbackResponse * response = new AsyncJsonCallbackResponse([this] () {onConfigUpdated();}, MAX_SETTINGS_SIZE);
JsonObject jsonObject = response->getRoot();
writeToJsonObject(jsonObject);
response->setLength();
request->send(response);
} else {
request->send(400);
}
}
protected:
// will serve setting endpoints from here
AsyncWebServer* _server;
// implement to perform action when config has been updated
virtual void onConfigUpdated(){}
public:
SettingsService(AsyncWebServer* server, FS* fs, char const* servicePath, char const* filePath):
SettingsPersistence(fs, servicePath, filePath), _server(server) {
// configure fetch config handler
_server->on(servicePath, HTTP_GET, std::bind(&SettingsService::fetchConfig, this, std::placeholders::_1));
// configure update settings handler
_updateHandler.setUri(servicePath);
_updateHandler.setMethod(HTTP_POST);
_updateHandler.setMaxContentLength(MAX_SETTINGS_SIZE);
_updateHandler.onRequest(std::bind(&SettingsService::updateConfig, this, std::placeholders::_1, std::placeholders::_2));
_server->addHandler(&_updateHandler);
}
virtual ~SettingsService() {}
virtual void begin() {
readFromFS();
}
};
#endif // end SettingsService