@gmod/vcf/esm/parseInfo.js

High performance streaming Variant Call Format (VCF) parser in pure JavaScript

function decodeURIComponentNoThrow(uri) {
    try {
        return decodeURIComponent(uri);
    }
    catch {
        return uri;
    }
}
export function parseInfo(infoStr, infoMeta) {
    const result = {};
    const hasDecode = infoStr.includes('%');
    const infoPairs = infoStr.split(';');
    const pairsLen = infoPairs.length;
    for (let i = 0; i < pairsLen; i++) {
        const pair = infoPairs[i] ?? '';
        const eqIdx = pair.indexOf('=');
        const key = eqIdx === -1 ? pair : pair.slice(0, eqIdx);
        const val = eqIdx === -1 ? undefined : pair.slice(eqIdx + 1);
        const itemType = infoMeta[key]?.Type;
        if (itemType === 'Flag' || !val) {
            result[key] = true;
        }
        else {
            const isNumber = itemType === 'Integer' || itemType === 'Float';
            const rawItems = val.split(',');
            const itemsLen = rawItems.length;
            const items = [];
            for (let j = 0; j < itemsLen; j++) {
                const v = rawItems[j] ?? '';
                if (v === '.') {
                    items.push(undefined);
                }
                else {
                    const w = hasDecode ? decodeURIComponentNoThrow(v) : v;
                    items.push(isNumber ? Number(w) : w);
                }
            }
            result[key] = items;
        }
    }
    return result;
}
//# sourceMappingURL=parseInfo.js.map