var err = 'error';
var sh = 'same_hash';
var sn = 'same_name';
var un = 'unique';

function OnInit(initData) {
    initData.name = 'DestDupeCheck';
    initData.version = '2025-10-14';
    initData.url = 'https://resource.dopus.com/t/source-to-destination-file-compare/57366/5';
    initData.default_enable = true;
    initData.min_version = '13.18.7';
}

function OnAddColumns(addColData) {
    var col = addColData.AddColumn();
    col.name = 'DestDupeCheck';
    col.method = 'OnColumn';
    col.justify = 'right';

    col.match.push_back(err);
    col.match.push_back(sh);
    col.match.push_back(sn);
    col.match.push_back(un);

    col.namerefresh = true;
    col.autorefresh = 2;
}

function OnColumn(scriptColData) {
    scriptColData.value = err;
    var item = scriptColData.item;

    var tab = scriptColData.tab;
    if (!tab) {
        // DOpus.Output('no tab:\t' + item);
        return;
    }

    if (!tab.path) {
        // DOpus.Output('no tab.path:\t' + item);
        return;
    }

    var dtab = tab.lister.desttab;

    if (!dtab) {
        // DOpus.Output('no dtab:\t' + item);
        return;
    }

    if (!dtab.path) {
        // DOpus.Output('no dtab.path:\t' + item);
        return;
    }

    var fsu = DOpus.FSUtil();

    var itemToCheck = fsu.GetItem(dtab.path + '\\' + item.name);

    var ret = fsu.Exists(itemToCheck) ? HasSameHash(item, itemToCheck) ? sh : sn : un;

    scriptColData.value = ret;
}

function HasSameHash(item, itemToCheck) {
    var size1 = String(item.size);
    var size2 = String(itemToCheck.size);

    if (size1 == '0' && size2 == '0') return true;

    if (size1 != size2) return false;

    var fsu = DOpus.FSUtil();
    var hash1 = fsu.Hash(item, 'md5');
    var hash2 = fsu.Hash(itemToCheck, 'md5');

    return hash1 == hash2;
}