108 lines
2.7 KiB
C++
108 lines
2.7 KiB
C++
#pragma once
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#include "message.h"
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#include "crypto.h"
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#include <WiFiMulti.h>
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#include <WiFiClientSecure.h>
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#include <WebSocketsClient.h>
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/**
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* An event signaled from the device
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*/
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enum class SesameEvent {
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TextReceived = 1,
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UnexpectedSocketEvent = 2,
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InvalidPayloadSize = 3,
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MessageAuthenticationFailed = 4,
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MessageTimeMismatch = 5,
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MessageCounterInvalid = 6,
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MessageAccepted = 7,
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InfoMessage = 8,
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};
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/**
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* @brief A callback for messages received over the socket
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*
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* The first parameter is the received message.
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* The second parameter is the response to the remote.
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* The return value is the type of event to respond with.
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*/
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typedef SesameEvent (*MessageCallback)(AuthenticatedMessage*, AuthenticatedMessage*);
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class ServerConnection {
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public:
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ServerConnection(const char* url, int port, const char* path);
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void connect(const char* key, uint32_t reconnectTime = 5000);
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void connectSSL(const char* key, uint32_t reconnectTime = 5000);
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void loop();
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void onMessage(MessageCallback callback);
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// Indicator that the socket is connected.
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bool socketIsConnected = false;
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private:
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const char* url;
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int port;
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const char* path;
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const char* key = NULL;
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MessageCallback messageCallback = NULL;
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// WebSocket to connect to the control server
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WebSocketsClient webSocket;
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void reconnectAfter(uint32_t reconnectTime);
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void registerEventCallback();
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/**
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* Callback for WebSocket events.
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*
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* Updates the connection state and processes received keys.
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*
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* @param payload The pointer to received data
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* @param length The number of bytes received
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*/
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void webSocketEventHandler(WStype_t type, uint8_t * payload, size_t length);
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/**
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* Process received binary data.
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*
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* Checks whether the received data is a valid and unused key,
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* and then signals that the motor should move.
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* Sends the event id to the server as a response to the request.
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*
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* If the key is valid, then `shouldStartOpening` is set to true.
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*
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* @param payload The pointer to the received data.
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* @param length The number of bytes received.
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*/
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void processReceivedBytes(uint8_t* payload, size_t length);
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/**
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* Send a response event to the server and include the next key index.
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*
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* Sends the event type as three byte.
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* @param event The event type
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*/
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void sendFailureResponse(SesameEvent event);
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/**
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* Send a response event to the server and include the next key index.
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*
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* Sends the event type as three byte.
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* @param event The event type
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*/
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void sendResponse(SesameEvent event, AuthenticatedMessage* message);
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}; |