44 lines
1.0 KiB
JavaScript
44 lines
1.0 KiB
JavaScript
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/**
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* Object representing human-readable version of a given number of bytes.
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*
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* (Extracted logic from an old dashboard view)
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*
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* @param bytes {Number}
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* @returns {Object}
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*/
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const BytesToSize = function (bytes) {
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if (!(this instanceof BytesToSize)) return new BytesToSize(bytes);
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this.bytes = bytes;
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if (bytes === 0) {
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this.unit = 0;
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} else {
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this.unit = parseInt(Math.floor(Math.log(bytes) / Math.log(1024)));
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}
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return this;
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};
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BytesToSize.prototype.size = function () {
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return (this.bytes / Math.pow(1024, this.unit));
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};
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BytesToSize.prototype.UNIT_SUFFIXES = ['B', 'kB', 'MB', 'GB', 'TB'];
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BytesToSize.prototype.suffix = function () {
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return this.UNIT_SUFFIXES[this.unit];
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};
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BytesToSize.prototype.toString = function (decimals) {
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let size = this.size();
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if (decimals) {
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// 1 decimal: 9.995 => 9.9
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const round = Math.pow(10, decimals);
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size = Math.floor(size * round) / round;
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} else {
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size = Math.floor(size);
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}
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return size + this.suffix();
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};
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module.exports = BytesToSize;
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