在JavaScript/Node.js中将Youtube Data API V3视频时长格式转换为秒

Question

我试图在JS/Node中将ISO 8601字符串转换为秒.我能想到的最好的是:

function convert_time(duration) {
    var a = duration.match(/\d+/g)
    var duration = 0

    if(a.length == 3) {
        duration = duration + parseInt(a[0]) * 3600;
        duration = duration + parseInt(a[1]) * 60;
        duration = duration + parseInt(a[2]);
    }

    if(a.length == 2) {
        duration = duration + parseInt(a[0]) * 60;
        duration = duration + parseInt(a[1]);
    }

    if(a.length == 1) {
        duration = duration + parseInt(a[0]);
    }
    return duration
}

它在输入"PT48S","PT3M20S"或"PT3H2M31S"等字符串时有效,但如果字符串为"PT1H11S"则失败.有没有人有更好的主意？

Answer 1

如果你正在使用moment.js,你可以简单地打电话给...

moment.duration('PT15M33S').asMilliseconds();

= 933000毫秒

Answer 2

function YTDurationToSeconds(duration) {
  var match = duration.match(/PT(\d+H)?(\d+M)?(\d+S)?/);

  match = match.slice(1).map(function(x) {
    if (x != null) {
        return x.replace(/\D/, '');
    }
  });

  var hours = (parseInt(match[0]) || 0);
  var minutes = (parseInt(match[1]) || 0);
  var seconds = (parseInt(match[2]) || 0);

  return hours * 3600 + minutes * 60 + seconds;
}

适用于这些情况:

PT1H
PT23M
PT45S
PT1H23M
PT1H45S
PT23M45S
PT1H23M45S

Answer 3

我建议这个小小的黑客来防止你的问题:

function convert_time(duration) {
    var a = duration.match(/\d+/g);

    if (duration.indexOf('M') >= 0 && duration.indexOf('H') == -1 && duration.indexOf('S') == -1) {
        a = [0, a[0], 0];
    }

    if (duration.indexOf('H') >= 0 && duration.indexOf('M') == -1) {
        a = [a[0], 0, a[1]];
    }
    if (duration.indexOf('H') >= 0 && duration.indexOf('M') == -1 && duration.indexOf('S') == -1) {
        a = [a[0], 0, 0];
    }

    duration = 0;

    if (a.length == 3) {
        duration = duration + parseInt(a[0]) * 3600;
        duration = duration + parseInt(a[1]) * 60;
        duration = duration + parseInt(a[2]);
    }

    if (a.length == 2) {
        duration = duration + parseInt(a[0]) * 60;
        duration = duration + parseInt(a[1]);
    }

    if (a.length == 1) {
        duration = duration + parseInt(a[0]);
    }
    return duration
}

小提琴

Answer 4

这是我的解决方案:

function parseDuration(duration) {
    var matches = duration.match(/[0-9]+[HMS]/g);

    var seconds = 0;

    matches.forEach(function (part) {
        var unit = part.charAt(part.length-1);
        var amount = parseInt(part.slice(0,-1));

        switch (unit) {
            case 'H':
                seconds += amount*60*60;
                break;
            case 'M':
                seconds += amount*60;
                break;
            case 'S':
                seconds += amount;
                break;
            default:
                // noop
        }
    });

    return seconds;
}