ng-anonymize
Version:
Data anonymization library for Angular
79 lines • 13.7 kB
JavaScript
import { __decorate } from "tslib";
import { Pipe } from '@angular/core';
import { AnonymizeDataType, AnonymizeDefaultValues, AnonymizeMethod, } from "../models/anonymize.models";
/* Predefined constants for text processing */
var ALPHABET = 'abcdefghijjklmnopqrstuvwyz';
var lowerAlpha = ALPHABET.split('');
var upperAlpha = ALPHABET.toUpperCase().split('');
var nums = '0123456789'.split('');
var AnonymizePipe = /** @class */ (function () {
function AnonymizePipe() {
}
AnonymizePipe.prototype.transform = function (value, method, options) {
if (method === void 0) { method = AnonymizeMethod.Randomize; }
if (!value)
return '';
// Extract options or default
var _a = options || {}, type = _a.type, _b = _a.mask, mask = _b === void 0 ? AnonymizeDefaultValues.MaskChar : _b, bleed = _a.bleed;
switch (method) {
case AnonymizeMethod.First:
// Replace all but first bleed characters by mask
return value.split('').map(function (c, index) { return index < (bleed || AnonymizeDefaultValues.LeftReveal) ? c : mask; }).join('');
case AnonymizeMethod.Last:
// Replace all but last bleed characters by mask
return value.split('').map(function (c, index) { return index >= value.length - (bleed || AnonymizeDefaultValues.RightReveal) ? c : mask; }).join('');
case AnonymizeMethod.Randomize:
// Replace each character with random value of same character class
return value.split('').map(function (c, index) {
var isLowerAlpha = lowerAlpha.indexOf(c) >= 0;
var isUpperAlpha = upperAlpha.indexOf(c) >= 0;
var isNum = nums.indexOf(c) >= 0;
var charClass = isLowerAlpha ? lowerAlpha : isUpperAlpha ? upperAlpha : isNum ? nums : null;
if (!charClass)
return c;
if (type === AnonymizeDataType.Phone) {
if (index < AnonymizeDefaultValues.PhoneCcLength)
return c;
}
return charClass[Math.floor(Math.random() * charClass.length)];
}).join('');
case AnonymizeMethod.Shuffle:
// Swap positions of all characters, preserving position of same character class
var chars = value.split('');
var shuffledAlpha_1 = chars
.filter(function (c) { return lowerAlpha.indexOf(c) >= 0 || upperAlpha.indexOf(c) >= 0; }).sort(function () { return 0.5 - Math.random(); });
var shuffledNums_1 = chars
.filter(function (c) { return nums.indexOf(c) >= 0; }).sort(function () { return 0.5 - Math.random(); });
return chars.map(function (c, index) {
var isLowerAlpha = lowerAlpha.indexOf(c) >= 0;
var isUpperAlpha = upperAlpha.indexOf(c) >= 0;
var isNum = nums.indexOf(c) >= 0;
var charClass = isLowerAlpha ? lowerAlpha : isUpperAlpha ? upperAlpha : isNum ? nums : null;
if (!charClass)
return c;
if (type === AnonymizeDataType.Phone) {
// If type = phone, do not transform first 3 characters
if (index < AnonymizeDefaultValues.PhoneCcLength)
return c;
}
var newChar = isNum ? shuffledNums_1.pop() : shuffledAlpha_1.pop();
if (isUpperAlpha)
newChar = newChar.toUpperCase();
else if (isLowerAlpha)
newChar = newChar.toLowerCase();
return newChar;
}).join('');
default:
return value || '';
}
};
AnonymizePipe = __decorate([
Pipe({
name: 'anonymize',
pure: true
})
], AnonymizePipe);
return AnonymizePipe;
}());
export { AnonymizePipe };
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c : mask).join('');\n      case AnonymizeMethod.Last:\n        // Replace all but last  bleed characters by mask\n        return value.split('').map((c, index) => index >= value.length - (bleed || AnonymizeDefaultValues.RightReveal) ? c : mask).join('');\n      case AnonymizeMethod.Randomize:\n        // Replace each character with random value of same character class\n        return value.split('').map((c, index) => {\n          const isLowerAlpha = lowerAlpha.indexOf(c) >= 0;\n          const isUpperAlpha = upperAlpha.indexOf(c) >= 0;\n          const isNum = nums.indexOf(c) >= 0;\n          const charClass = isLowerAlpha ? lowerAlpha : isUpperAlpha ? upperAlpha : isNum ? nums : null;\n          if (!charClass) return c;\n          if (type === AnonymizeDataType.Phone) {\n            if (index < AnonymizeDefaultValues.PhoneCcLength) return c;\n          }\n          return charClass[Math.floor(Math.random() * charClass.length)];\n        }).join('');\n      case AnonymizeMethod.Shuffle:\n        // Swap positions of all characters, preserving position of same character class\n        const chars = value.split('');\n        const shuffledAlpha = chars\n          .filter(c => lowerAlpha.indexOf(c) >= 0 || upperAlpha.indexOf(c) >= 0).sort(() => 0.5 - Math.random());\n        const shuffledNums = chars\n          .filter(c => nums.indexOf(c) >= 0).sort(() => 0.5 - Math.random());\n        return chars.map((c, index) => {\n          const isLowerAlpha = lowerAlpha.indexOf(c) >= 0;\n          const isUpperAlpha = upperAlpha.indexOf(c) >= 0;\n          const isNum = nums.indexOf(c) >= 0;\n          const charClass = isLowerAlpha ? lowerAlpha : isUpperAlpha ? upperAlpha : isNum ? nums : null;\n          if (!charClass) return c;\n          if (type === AnonymizeDataType.Phone) {\n            //  If type = phone, do not transform first 3 characters\n            if (index < AnonymizeDefaultValues.PhoneCcLength) return c;\n          }\n          let newChar = isNum ? shuffledNums.pop() : shuffledAlpha.pop();\n          if (isUpperAlpha) newChar = newChar.toUpperCase();\n          else if (isLowerAlpha) newChar = newChar.toLowerCase();\n          return newChar;\n        }).join('');\n      default:\n        return value || '';\n    }\n  }\n\n}\n"]}