39 lines
819 B
JavaScript
39 lines
819 B
JavaScript
const BYTE_UNIT = 'B';
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const UNITS = ['kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
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export default {
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/// <summary>
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/// Generate a GUID
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/// </summary>
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guid()
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{
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return ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, c =>
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(c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16)
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);
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},
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/// <summary>
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/// Generate human-readable filesize from byte number
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/// </summary>
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filesize(bytes)
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{
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if (typeof bytes !== 'number')
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{
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return '0 ' + BYTE_UNIT;
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}
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var thresh = 1024;
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if (Math.abs(bytes) < thresh)
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{
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return bytes + ' ' + BYTE_UNIT;
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}
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var u = -1;
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do
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{
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bytes /= thresh;
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++u;
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} while (Math.abs(bytes) >= thresh && u < UNITS.length - 1);
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return bytes.toFixed(1) + ' ' + UNITS[u];
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}
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}; |