credit-card-type
Version:
A library for determining credit card type
33 lines (32 loc) • 1.19 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.findBestMatch = void 0;
function hasEnoughResultsToDetermineBestMatch(results) {
var numberOfResultsWithMaxStrengthProperty = results.filter(function (result) { return result.matchStrength; }).length;
/*
* if all possible results have a maxStrength property that means the card
* number is sufficiently long enough to determine conclusively what the card
* type is
* */
return (numberOfResultsWithMaxStrengthProperty > 0 &&
numberOfResultsWithMaxStrengthProperty === results.length);
}
function findBestMatch(results) {
if (!hasEnoughResultsToDetermineBestMatch(results)) {
return null;
}
return results.reduce(function (bestMatch, result) {
if (!bestMatch) {
return result;
}
/*
* If the current best match pattern is less specific than this result, set
* the result as the new best match
* */
if (Number(bestMatch.matchStrength) < Number(result.matchStrength)) {
return result;
}
return bestMatch;
});
}
exports.findBestMatch = findBestMatch;