ocs.h

#ifndef _OCS_H
#define _OCS_H
/*
 * Fledge OSIsoft ADH and OCS integration.
 *
 * Copyright (c) 2020-2025 Dianomic Systems
 *
 * Released under the Apache 2.0 Licence
 *
 * Author: Stefano Simonelli
 */
 
#include <string>
#include <chrono>
 
using namespace std;
 
#define TIMEOUT_CONNECT   10
#define TIMEOUT_REQUEST   10
#define RETRY_SLEEP_TIME  1
 
#define URL_RETRIEVE_TOKEN "/identity/connect/token"
 
#define PAYLOAD_RETRIEVE_TOKEN "grant_type=client_credentials&client_id=CLIENT_ID_PLACEHOLDER&client_secret=CLIENT_SECRET_ID_PLACEHOLDER"
 
class OCS
{
    public:
        OCS(const std::string &authorizationUrl);
 
        // Destructor
        ~OCS();
 
        std::string OCSRetrieveAuthToken(const string& clientId, const string& clientSecret, bool logMessage = true);
        int  retrieveToken(const string& clientId, const string& clientSecret, bool logMessage = true);
        void  extractToken(const string& response);
    private:
        std::string m_token;
        std::string m_authUrl;
        unsigned int m_expiresIn;
        std::chrono::steady_clock::time_point m_nextAuthentication;
};
#endif