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ng-anonymize

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Data anonymization library for Angular

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import { __decorate } from "tslib"; import { Pipe } from '@angular/core'; import { AnonymizeDataType, AnonymizeDefaultValues, AnonymizeMethod, } from "../models/anonymize.models"; /* Predefined constants for text processing */ const ALPHABET = 'abcdefghijjklmnopqrstuvwyz'; const lowerAlpha = ALPHABET.split(''); const upperAlpha = ALPHABET.toUpperCase().split(''); const nums = '0123456789'.split(''); let AnonymizePipe = class AnonymizePipe { transform(value, method = AnonymizeMethod.Randomize, options) { if (!value) return ''; // Extract options or default const { type, mask = AnonymizeDefaultValues.MaskChar, bleed } = options || {}; switch (method) { case AnonymizeMethod.First: // Replace all but first bleed characters by mask return value.split('').map((c, index) => index < (bleed || AnonymizeDefaultValues.LeftReveal) ? c : mask).join(''); case AnonymizeMethod.Last: // Replace all but last bleed characters by mask return value.split('').map((c, index) => 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((c, index) => { const isLowerAlpha = lowerAlpha.indexOf(c) >= 0; const isUpperAlpha = upperAlpha.indexOf(c) >= 0; const isNum = nums.indexOf(c) >= 0; const 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 const chars = value.split(''); const shuffledAlpha = chars .filter(c => lowerAlpha.indexOf(c) >= 0 || upperAlpha.indexOf(c) >= 0).sort(() => 0.5 - Math.random()); const shuffledNums = chars .filter(c => nums.indexOf(c) >= 0).sort(() => 0.5 - Math.random()); return chars.map((c, index) => { const isLowerAlpha = lowerAlpha.indexOf(c) >= 0; const isUpperAlpha = upperAlpha.indexOf(c) >= 0; const isNum = nums.indexOf(c) >= 0; const 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; } let newChar = isNum ? shuffledNums.pop() : shuffledAlpha.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); export { AnonymizePipe }; //# 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{Pipe, PipeTransform} from '@angular/core';\nimport {AnonymizePipeOptions} from \"./anonymize.pipe.model\";\nimport {\n  AnonymizeDataType,\n  AnonymizeDefaultValues,\n  AnonymizeMethod,\n  AnonymizeOptions,\n} from \"../models/anonymize.models\";\n\n/* Predefined constants for text processing */\nconst ALPHABET = 'abcdefghijjklmnopqrstuvwyz';\nconst lowerAlpha = ALPHABET.split('');\nconst upperAlpha = ALPHABET.toUpperCase().split('');\nconst nums = '0123456789'.split('');\n\n@Pipe({\n  name: 'anonymize',\n  pure: true\n})\nexport class AnonymizePipe implements PipeTransform {\n\n  transform(value: string, method: AnonymizeMethod = AnonymizeMethod.Randomize, options?: AnonymizePipeOptions): string {\n    if (!value) return '';\n    //  Extract options or default\n    const {type, mask = AnonymizeDefaultValues.MaskChar, bleed} = options as AnonymizeOptions || {};\n\n    switch (method) {\n      case AnonymizeMethod.First:\n        // Replace all but first bleed characters by mask\n        return value.split('').map((c, index) => index < (bleed || AnonymizeDefaultValues.LeftReveal) ? 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"]}