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57 lines
1.9 KiB
57 lines
1.9 KiB
/**
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* timeFormat(format, date) formats the passed-in Date object using the format string. The format
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* string may contain the following:
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* 'h': hour (00 - 23)
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* 'm': minute (00 - 59)
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* 's': second (00 - 59)
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* 'd': day of the month (01 - 31)
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* 'n': month (01 - 12)
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* 'y': 4-digit year
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* 'M': milliseconds (000 - 999)
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* 'Y': date as 20140212
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* 'D': date as 2014-02-12
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* 'T': time as 00:51:06
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* 'A': full time and date, as 2014-02-12 00:51:06.123
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* @param {String} format The format string.
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* @param {Date} date The date/time object to format.
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* @returns {String} The formatted date and/or time.
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*/
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function pad(num: number, len: number): string {
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const s = num.toString();
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return s.length >= len ? s : "00000000".slice(0, len - s.length) + s;
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}
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type FormatHelper = (out: string[], date: Date) => void;
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const timeFormatKeys: {[spec: string]: FormatHelper} = {
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h: (out, date) => out.push(pad(date.getHours(), 2)),
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m: (out, date) => out.push(pad(date.getMinutes(), 2)),
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s: (out, date) => out.push(pad(date.getSeconds(), 2)),
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d: (out, date) => out.push(pad(date.getDate(), 2)),
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n: (out, date) => out.push(pad(date.getMonth() + 1, 2)),
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y: (out, date) => out.push("" + date.getFullYear()),
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M: (out, date) => out.push(pad(date.getMilliseconds(), 3)),
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Y: (out, date) => timeFormatHelper(out, 'ynd', date),
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D: (out, date) => timeFormatHelper(out, 'y-n-d', date),
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T: (out, date) => timeFormatHelper(out, 'h:m:s', date),
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A: (out, date) => timeFormatHelper(out, 'D T.M', date),
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};
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function timeFormatHelper(out: string[], format: string, date: Date) {
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for (let i = 0, len = format.length; i < len; i++) {
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const c = format[i];
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const helper = timeFormatKeys[c];
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if (helper) {
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helper(out, date);
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} else {
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out.push(c);
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}
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}
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}
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export function timeFormat(format: string, date: Date): string {
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const out: string[] = [];
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timeFormatHelper(out, format, date);
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return out.join("");
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}
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