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Utils_Converters.js.html
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<h1>Utils/Converters.js</h1>
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<pre class="prettyprint source linenums"><code>/**
* Creates array of unicodes from passed in text
* @category Utils
* @method
* @param {String} text
* @returns {Array} Array of Unicodes
*/
export const textToUnicodeDecimalArray = (text) => {
return text.split('').map(letter => letter.charCodeAt(0))
}
/**
* Decimal number to binary representation in string converter
* @category Utils
* @method
* @param {Number} decimal
* @param {Number} bits Bit format
* @returns {String} Binary string representing decimal
*/
export const decimalToBinary = (decimal, bits) => {
const binary = decimal.toString(2);
return '0'.repeat(bits - binary.length) + binary;
}
/**
* Text to binary represented in string converter
* @category Utils
* @method
* @param {String} textInput
* @param {Number} bits Bit format
* @returns {String} Binary representation of text in string
*/
export const textToBinary = (textInput, bits) => {
const unicodeArray = textToUnicodeDecimalArray(textInput);
return unicodeArray.map(value => decimalToBinary(value, bits)).join('');
}
/**
* Converts binary input to readable text
* @category Utils
* @method
* @param {String} binaryInput String of 0s & 1s
* @param {Number} bits Bit format
* @returns {String} Readable string
*/
export const binaryToText = (binaryInput, bits) => {
const regex = new RegExp(`.{1,${bits}}`, 'g');
return binaryInput.match(regex).map((el) => String.fromCharCode((parseInt(el, 2)))).join('')
}
/**
* convert a Unicode string to a string in which
* each 16-bit unit occupies only one byte<br>
* Code from Mozilla<br>
* {@link https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/btoa?fbclid=IwAR2FhZPn4vEIK4iComCdQaLkN-pyvDvu1QG3hlKDZYIrs-gMrGPnXsTjD9A}
* @category Utils
* @method
* @param {String} string Unciode string
* @returns {String} 8 Bit binary string
*/
export const unicodeTo8BitBinary = (string) => {
const codeUnits = new Uint16Array(string.length);
for (let i = 0; i < codeUnits.length; i++) {
codeUnits[i] = string.charCodeAt(i);
}
return String.fromCharCode(...new Uint8Array(codeUnits.buffer));
}
/**
* conver 8 Bit binary string to Unicode string<br>
* Code from Mozilla<br>
* {@link https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/btoa?fbclid=IwAR2FhZPn4vEIK4iComCdQaLkN-pyvDvu1QG3hlKDZYIrs-gMrGPnXsTjD9A}
* @category Utils
* @method
* @param {String} binary string of binary chars
* @returns {String} Unicode string
*/
export const from8BitBinaryToUnicode = (binary) => {
const bytes = new Uint8Array(binary.length);
for (let i = 0; i < bytes.length; i++) {
bytes[i] = binary.charCodeAt(i);
}
return String.fromCharCode(...new Uint16Array(bytes.buffer));
}
/**
* Convert UTF16 to Base64
* @category Utils
* @method
* @param {String} utf16 String in UTF16 format
* @returns {String} String in Base64 format
*/
export const UTF16ToBase64 = (utf16) => {
const converted = unicodeTo8BitBinary(utf16);
return btoa(converted);
}
/**
* Convert Base64 to UTF16
* @category Utils
* @method
* @param {String} base64 String in Base64 format
* @returns {String} String in Base64 format
*/
export const base64ToUTF16 = (base64) => {
const decoded = atob(base64);
return from8BitBinaryToUnicode(decoded);
}</code></pre>
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