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128 lines
4.1 KiB
128 lines
4.1 KiB
(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.cuid = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){ |
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/** |
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* cuid.js |
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* Collision-resistant UID generator for browsers and node. |
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* Sequential for fast db lookups and recency sorting. |
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* Safe for element IDs and server-side lookups. |
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* |
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* Extracted from CLCTR |
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* |
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* Copyright (c) Eric Elliott 2012 |
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* MIT License |
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*/ |
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var fingerprint = require('./lib/fingerprint.js'); |
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var pad = require('./lib/pad.js'); |
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var getRandomValue = require('./lib/getRandomValue.js'); |
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var c = 0, |
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blockSize = 4, |
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base = 36, |
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discreteValues = Math.pow(base, blockSize); |
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function randomBlock () { |
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return pad((getRandomValue() * |
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discreteValues << 0) |
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.toString(base), blockSize); |
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} |
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function safeCounter () { |
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c = c < discreteValues ? c : 0; |
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c++; // this is not subliminal |
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return c - 1; |
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} |
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function cuid () { |
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// Starting with a lowercase letter makes |
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// it HTML element ID friendly. |
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var letter = 'c', // hard-coded allows for sequential access |
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// timestamp |
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// warning: this exposes the exact date and time |
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// that the uid was created. |
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timestamp = (new Date().getTime()).toString(base), |
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// Prevent same-machine collisions. |
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counter = pad(safeCounter().toString(base), blockSize), |
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// A few chars to generate distinct ids for different |
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// clients (so different computers are far less |
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// likely to generate the same id) |
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print = fingerprint(), |
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|
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// Grab some more chars from Math.random() |
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random = randomBlock() + randomBlock(); |
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return letter + timestamp + counter + print + random; |
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} |
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cuid.slug = function slug () { |
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var date = new Date().getTime().toString(36), |
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counter = safeCounter().toString(36).slice(-4), |
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print = fingerprint().slice(0, 1) + |
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fingerprint().slice(-1), |
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random = randomBlock().slice(-2); |
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return date.slice(-2) + |
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counter + print + random; |
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}; |
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cuid.isCuid = function isCuid (stringToCheck) { |
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if (typeof stringToCheck !== 'string') return false; |
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if (stringToCheck.startsWith('c')) return true; |
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return false; |
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}; |
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cuid.isSlug = function isSlug (stringToCheck) { |
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if (typeof stringToCheck !== 'string') return false; |
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var stringLength = stringToCheck.length; |
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if (stringLength >= 7 && stringLength <= 10) return true; |
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return false; |
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}; |
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cuid.fingerprint = fingerprint; |
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module.exports = cuid; |
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},{"./lib/fingerprint.js":2,"./lib/getRandomValue.js":3,"./lib/pad.js":4}],2:[function(require,module,exports){ |
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var pad = require('./pad.js'); |
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var env = typeof window === 'object' ? window : self; |
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var globalCount = Object.keys(env).length; |
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var mimeTypesLength = navigator.mimeTypes ? navigator.mimeTypes.length : 0; |
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var clientId = pad((mimeTypesLength + |
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navigator.userAgent.length).toString(36) + |
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globalCount.toString(36), 4); |
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module.exports = function fingerprint () { |
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return clientId; |
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}; |
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},{"./pad.js":4}],3:[function(require,module,exports){ |
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var getRandomValue; |
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var crypto = typeof window !== 'undefined' && |
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(window.crypto || window.msCrypto) || |
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typeof self !== 'undefined' && |
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self.crypto; |
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if (crypto) { |
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var lim = Math.pow(2, 32) - 1; |
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getRandomValue = function () { |
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return Math.abs(crypto.getRandomValues(new Uint32Array(1))[0] / lim); |
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}; |
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} else { |
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getRandomValue = Math.random; |
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} |
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module.exports = getRandomValue; |
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},{}],4:[function(require,module,exports){ |
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module.exports = function pad (num, size) { |
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var s = '000000000' + num; |
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return s.substr(s.length - size); |
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}; |
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},{}]},{},[1])(1) |
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});
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