HttpClient.h

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#pragma once
 
#include "tgbot/HttpFormField.h"
#include "tgbot/export.h"
 
#include <atomic>
#include <cstdint>
#include <span>
#include <stdexcept>
#include <string>
#include <string_view>
 
namespace TgBot {

class TGBOT_API RequestCancelled : public std::runtime_error {
public:
    RequestCancelled();
    explicit RequestCancelled(std::string_view request);
};

class TGBOT_API HttpClient {
public:
    virtual ~HttpClient() = default;

    virtual std::string makeRequest(const std::string& url, std::span<const HttpFormField> fields) const = 0;
 
    std::int32_t _timeout = 25;

    virtual int getRequestMaxRetries() const {
        return requestMaxRetries;
    }

    virtual int getRequestBackoffSeconds() const {
        return requestBackoffSeconds;
    }

    virtual void cancel(const bool eternal = false) const {
        if (eternal) {
            _isEternalCancel.store(true);
        } else {
            _cancelEpoch.fetch_add(1);
        }
    }

    virtual bool isEternalCancelled() const {
        return _isEternalCancel.load();
    }
 
protected:
    mutable std::atomic<bool> _isEternalCancel { false };

    mutable std::atomic<uint64_t> _cancelEpoch { 0 };
 
private:
    int requestMaxRetries = 3;
    int requestBackoffSeconds = 1;
};
 
} // namespace TgBot