81 lines
2.3 KiB
JavaScript
81 lines
2.3 KiB
JavaScript
/*jshint node:true */
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"use strict";
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var minimalDesc = ['h', 'min', 's', 'ms', 'μs', 'ns'];
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var verboseDesc = ['hour', 'minute', 'second', 'millisecond', 'microsecond', 'nanosecond'];
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var convert = [60*60, 60, 1, 1e6, 1e3, 1];
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module.exports = function (source, opts) {
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var verbose, precise, i, spot, sourceAtStep, valAtStep, decimals, strAtStep, results, totalSeconds;
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verbose = false;
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precise = false;
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if (opts) {
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verbose = opts.verbose || false;
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precise = opts.precise || false;
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}
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if (!Array.isArray(source) || source.length !== 2) {
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return '';
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}
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if (typeof source[0] !== 'number' || typeof source[1] !== 'number') {
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return '';
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}
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// normalize source array due to changes in node v5.4+
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if (source[1] < 0) {
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totalSeconds = source[0] + source[1] / 1e9;
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source[0] = parseInt(totalSeconds);
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source[1] = parseFloat((totalSeconds % 1).toPrecision(9)) * 1e9;
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}
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results = '';
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// foreach unit
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for (i = 0; i < 6; i++) {
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spot = i < 3 ? 0 : 1; // grabbing first or second spot in source array
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sourceAtStep = source[spot];
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if (i !== 3 && i !== 0) {
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sourceAtStep = sourceAtStep % convert[i-1]; // trim off previous portions
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}
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if (i === 2) {
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sourceAtStep += source[1]/1e9; // get partial seconds from other portion of the array
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}
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valAtStep = sourceAtStep / convert[i]; // val at this unit
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if (valAtStep >= 1) {
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if (verbose) {
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valAtStep = Math.floor(valAtStep); // deal in whole units, subsequent laps will get the decimal portion
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}
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if (!precise) {
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// don't fling too many decimals
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decimals = valAtStep >= 10 ? 0 : 2;
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strAtStep = valAtStep.toFixed(decimals);
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} else {
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strAtStep = valAtStep.toString();
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}
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if (strAtStep.indexOf('.') > -1 && strAtStep[strAtStep.length-1] === '0') {
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strAtStep = strAtStep.replace(/\.?0+$/,''); // remove trailing zeros
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}
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if (results) {
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results += ' '; // append space if we have a previous value
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}
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results += strAtStep; // append the value
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// append units
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if (verbose) {
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results += ' '+verboseDesc[i];
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if (strAtStep !== '1') {
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results += 's';
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}
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} else {
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results += ' '+minimalDesc[i];
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}
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if (!verbose) {
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break; // verbose gets as many groups as necessary, the rest get only one
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}
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}
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}
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return results;
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};
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