/*
 * Copyright 2023, Andrew Lindesay <apl@lindesay.co.nz>.
 * All rights reserved. Distributed under the terms of the MIT License.
 */


#include "ChecksumJsonEventListener.h"


ChecksumJsonEventListener::ChecksumJsonEventListener(int32 checksumLimit)
        :
        fChecksum(0),
        fChecksumLimit(checksumLimit),
        fError(B_OK),
        fCompleted(false)
{
}


ChecksumJsonEventListener::~ChecksumJsonEventListener()
{
}


bool
ChecksumJsonEventListener::Handle(const BJsonEvent& event)
{
        if (fCompleted || B_OK != fError)
                return false;

        switch (event.EventType()) {
                case B_JSON_NUMBER:
                {
                        const char* content = event.Content();
                        _ChecksumProcessCharacters(content, strlen(content));
                        break;
                }
                case B_JSON_STRING:
                case B_JSON_OBJECT_NAME:
                {
                        const char* content = event.Content();
                        _ChecksumProcessCharacters(content, strlen(content));
                        break;
                }
                default:
                        break;
        }

        return true;
}


void
ChecksumJsonEventListener::HandleError(status_t status, int32 line, const char* message)
{
        fError = status;
}


void
ChecksumJsonEventListener::Complete()
{
        fCompleted = true;
}


uint32
ChecksumJsonEventListener::Checksum() const
{
        return fChecksum;
}


status_t
ChecksumJsonEventListener::Error() const
{
        return fError;
}


void
ChecksumJsonEventListener::_ChecksumProcessCharacters(const char* content, size_t len)
{
        for (size_t i = 0; i < len; i++) {
                fChecksum = (fChecksum + static_cast<int32>(content[i])) % fChecksumLimit;
        }
}