src/vs/base/common/uuid.ts

70 LOC · 29 covered · 41 uncovered · 5 ranges · 9304 concepts · 3 introducers · 4835 tests

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  /*---------------------------------------------------------------------------------------------
  
uuid.ts ×3

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   *  Copyright (c) Microsoft Corporation. All rights reserved.
  
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   *  Licensed under the MIT License. See License.txt in the project root for license information.
  
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   *--------------------------------------------------------------------------------------------*/
  
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  const _UUIDPattern = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
  
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  export function isUUID(value: string): boolean {
  
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  	return _UUIDPattern.test(value);
  
uuid.ts ×1

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  }
  
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uuid.ts ×3

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  export const generateUuid = (function (): () => string {
  
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  	// use `randomUUID` if possible
  
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  	if (typeof crypto.randomUUID === 'function') {
  
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  		// see https://developer.mozilla.org/en-US/docs/Web/API/Window/crypto
  
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  		// > Although crypto is available on all windows, the returned Crypto object only has one
  
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  		// > usable feature in insecure contexts: the getRandomValues() method.
  
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  		// > In general, you should use this API only in secure contexts.
  
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  		return crypto.randomUUID.bind(crypto);
  
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  	}
  
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  	// prep-work
  
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  	const _data = new Uint8Array(16);
  
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  	const _hex: string[] = [];
  
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  	for (let i = 0; i < 256; i++) {
  
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  		_hex.push(i.toString(16).padStart(2, '0'));
  
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  	}
  
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  	return function generateUuid(): string {
  
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  		// get data
  
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  		crypto.getRandomValues(_data);
  
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  		// set version bits
  
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  		_data[6] = (_data[6] & 0x0f) | 0x40;
  
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  		_data[8] = (_data[8] & 0x3f) | 0x80;
  
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  		// print as string
  
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  		let i = 0;
  
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  		let result = '';
  
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  		result += _hex[_data[i++]];
  
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  		result += _hex[_data[i++]];
  
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  		result += _hex[_data[i++]];
  
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  		result += _hex[_data[i++]];
  
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  		result += '-';
  
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  		result += _hex[_data[i++]];
  
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  		result += _hex[_data[i++]];
  
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  		result += '-';
  
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  		result += _hex[_data[i++]];
  
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  		result += _hex[_data[i++]];
  
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  		result += '-';
  
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  		result += _hex[_data[i++]];
  
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  		result += _hex[_data[i++]];
  
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  		result += '-';
  
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  		result += _hex[_data[i++]];
  
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  		result += _hex[_data[i++]];
  
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  		result += _hex[_data[i++]];
  
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  		result += _hex[_data[i++]];
  
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  		result += _hex[_data[i++]];
  
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  		result += _hex[_data[i++]];
  
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  		return result;
  
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  	};
  
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  })();
  
uuid.ts ×3

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  /** Namespace should be 3 letters, e.g. `abc-<uuid>`. */
  
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  export function prefixedUuid(namespace: string): string {
  
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  	return `${namespace}-${generateUuid()}`;
  
uuid.ts ×1

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  }