Commit With Frontend and Backend in MERN

backend/node_modules/bson/src/utils/web_byte_utils.ts

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+import { BSONError } from '../error';
+import { tryReadBasicLatin } from './latin';
+import { parseUtf8 } from '../parse_utf8';
+
+type TextDecoder = {
+  readonly encoding: string;
+  readonly fatal: boolean;
+  readonly ignoreBOM: boolean;
+  decode(input?: Uint8Array): string;
+};
+type TextDecoderConstructor = {
+  new (label: 'utf8', options: { fatal: boolean; ignoreBOM?: boolean }): TextDecoder;
+};
+
+type TextEncoder = {
+  readonly encoding: string;
+  encode(input?: string): Uint8Array;
+};
+type TextEncoderConstructor = {
+  new (): TextEncoder;
+};
+
+// Web global
+declare const TextDecoder: TextDecoderConstructor;
+declare const TextEncoder: TextEncoderConstructor;
+declare const atob: (base64: string) => string;
+declare const btoa: (binary: string) => string;
+
+type ArrayBufferViewWithTag = ArrayBufferView & {
+  [Symbol.toStringTag]?: string;
+};
+
+function isReactNative() {
+  const { navigator } = globalThis as { navigator?: { product?: string } };
+  return typeof navigator === 'object' && navigator.product === 'ReactNative';
+}
+
+/** @internal */
+export function webMathRandomBytes(byteLength: number) {
+  if (byteLength < 0) {
+    throw new RangeError(`The argument 'byteLength' is invalid. Received ${byteLength}`);
+  }
+  return webByteUtils.fromNumberArray(
+    Array.from({ length: byteLength }, () => Math.floor(Math.random() * 256))
+  );
+}
+
+/** @internal */
+const webRandomBytes: (byteLength: number) => Uint8Array = (() => {
+  const { crypto } = globalThis as {
+    crypto?: { getRandomValues?: (space: Uint8Array) => Uint8Array };
+  };
+  if (crypto != null && typeof crypto.getRandomValues === 'function') {
+    return (byteLength: number) => {
+      // @ts-expect-error: crypto.getRandomValues cannot actually be null here
+      // You cannot separate getRandomValues from crypto (need to have this === crypto)
+      return crypto.getRandomValues(webByteUtils.allocate(byteLength));
+    };
+  } else {
+    if (isReactNative()) {
+      const { console } = globalThis as { console?: { warn?: (message: string) => void } };
+      console?.warn?.(
+        'BSON: For React Native please polyfill crypto.getRandomValues, e.g. using: https://www.npmjs.com/package/react-native-get-random-values.'
+      );
+    }
+    return webMathRandomBytes;
+  }
+})();
+
+const HEX_DIGIT = /(\d|[a-f])/i;
+
+/** @internal */
+export const webByteUtils = {
+  toLocalBufferType(
+    potentialUint8array: Uint8Array | ArrayBufferViewWithTag | ArrayBuffer
+  ): Uint8Array {
+    const stringTag =
+      potentialUint8array?.[Symbol.toStringTag] ??
+      Object.prototype.toString.call(potentialUint8array);
+
+    if (stringTag === 'Uint8Array') {
+      return potentialUint8array as Uint8Array;
+    }
+
+    if (ArrayBuffer.isView(potentialUint8array)) {
+      return new Uint8Array(
+        potentialUint8array.buffer.slice(
+          potentialUint8array.byteOffset,
+          potentialUint8array.byteOffset + potentialUint8array.byteLength
+        )
+      );
+    }
+
+    if (
+      stringTag === 'ArrayBuffer' ||
+      stringTag === 'SharedArrayBuffer' ||
+      stringTag === '[object ArrayBuffer]' ||
+      stringTag === '[object SharedArrayBuffer]'
+    ) {
+      return new Uint8Array(potentialUint8array);
+    }
+
+    throw new BSONError(`Cannot make a Uint8Array from passed potentialBuffer.`);
+  },
+
+  allocate(size: number): Uint8Array {
+    if (typeof size !== 'number') {
+      throw new TypeError(`The "size" argument must be of type number. Received ${String(size)}`);
+    }
+    return new Uint8Array(size);
+  },
+
+  allocateUnsafe(size: number): Uint8Array {
+    return webByteUtils.allocate(size);
+  },
+
+  equals(a: Uint8Array, b: Uint8Array): boolean {
+    if (a.byteLength !== b.byteLength) {
+      return false;
+    }
+    for (let i = 0; i < a.byteLength; i++) {
+      if (a[i] !== b[i]) {
+        return false;
+      }
+    }
+    return true;
+  },
+
+  fromNumberArray(array: number[]): Uint8Array {
+    return Uint8Array.from(array);
+  },
+
+  fromBase64(base64: string): Uint8Array {
+    return Uint8Array.from(atob(base64), c => c.charCodeAt(0));
+  },
+
+  toBase64(uint8array: Uint8Array): string {
+    return btoa(webByteUtils.toISO88591(uint8array));
+  },
+
+  /** **Legacy** binary strings are an outdated method of data transfer. Do not add public API support for interpreting this format */
+  fromISO88591(codePoints: string): Uint8Array {
+    return Uint8Array.from(codePoints, c => c.charCodeAt(0) & 0xff);
+  },
+
+  /** **Legacy** binary strings are an outdated method of data transfer. Do not add public API support for interpreting this format */
+  toISO88591(uint8array: Uint8Array): string {
+    return Array.from(Uint16Array.from(uint8array), b => String.fromCharCode(b)).join('');
+  },
+
+  fromHex(hex: string): Uint8Array {
+    const evenLengthHex = hex.length % 2 === 0 ? hex : hex.slice(0, hex.length - 1);
+    const buffer = [];
+
+    for (let i = 0; i < evenLengthHex.length; i += 2) {
+      const firstDigit = evenLengthHex[i];
+      const secondDigit = evenLengthHex[i + 1];
+
+      if (!HEX_DIGIT.test(firstDigit)) {
+        break;
+      }
+      if (!HEX_DIGIT.test(secondDigit)) {
+        break;
+      }
+
+      const hexDigit = Number.parseInt(`${firstDigit}${secondDigit}`, 16);
+      buffer.push(hexDigit);
+    }
+
+    return Uint8Array.from(buffer);
+  },
+
+  toHex(uint8array: Uint8Array): string {
+    return Array.from(uint8array, byte => byte.toString(16).padStart(2, '0')).join('');
+  },
+
+  toUTF8(uint8array: Uint8Array, start: number, end: number, fatal: boolean): string {
+    const basicLatin = end - start <= 20 ? tryReadBasicLatin(uint8array, start, end) : null;
+    if (basicLatin != null) {
+      return basicLatin;
+    }
+
+    return parseUtf8(uint8array, start, end, fatal);
+  },
+
+  utf8ByteLength(input: string): number {
+    return new TextEncoder().encode(input).byteLength;
+  },
+
+  encodeUTF8Into(uint8array: Uint8Array, source: string, byteOffset: number): number {
+    const bytes = new TextEncoder().encode(source);
+    uint8array.set(bytes, byteOffset);
+    return bytes.byteLength;
+  },
+
+  randomBytes: webRandomBytes,
+
+  swap32(buffer: Uint8Array): Uint8Array {
+    if (buffer.length % 4 !== 0) {
+      throw new RangeError('Buffer size must be a multiple of 32-bits');
+    }
+
+    for (let i = 0; i < buffer.length; i += 4) {
+      const byte0 = buffer[i];
+      const byte1 = buffer[i + 1];
+      const byte2 = buffer[i + 2];
+      const byte3 = buffer[i + 3];
+      buffer[i] = byte3;
+      buffer[i + 1] = byte2;
+      buffer[i + 2] = byte1;
+      buffer[i + 3] = byte0;
+    }
+
+    return buffer;
+  }
+};