@react-native-firebase/app/dist/module/common/Base64.js

A well tested, feature rich Firebase implementation for React Native, supporting iOS & Android. Individual module support for Admob, Analytics, Auth, Crash Reporting, Cloud Firestore, Database, Dynamic Links, Functions, Messaging (FCM), Remote Config, Sto

"use strict";

/*
 * Copyright (c) 2016-present Invertase Limited & Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this library except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

// @ts-expect-error - No type declarations available
import binaryToBase64 from 'react-native/Libraries/Utilities/binaryToBase64';
import { promiseDefer } from "./promise.js";
const CHARS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';

/**
 * window.btoa
 */
function btoa(input) {
  let map;
  let i = 0;
  let block = 0;
  let output = '';
  for (block = 0, i = 0, map = CHARS; input.charAt(i | 0) || (map = '=', i % 1); output += map.charAt(63 & block >> 8 - i % 1 * 8)) {
    const charCode = input.charCodeAt(i += 3 / 4);
    if (charCode > 0xff) {
      throw new Error("'RNFirebase.Base64.btoa' failed: The string to be encoded contains characters outside of the Latin1 range.");
    }
    block = block << 8 | charCode;
  }
  return output;
}

/**
 * window.atob
 */
function atob(input) {
  let i = 0;
  let bc = 0;
  let bs = 0;
  let buffer;
  let output = '';
  const str = input.replace(/[=]+$/, '');
  if (str.length % 4 === 1) {
    throw new Error("'RNFirebase.Base64.atob' failed: The string to be decoded is not correctly encoded.");
  }
  for (bc = 0, bs = 0, i = 0; buffer = str.charAt(i++); ~buffer && (bs = bc % 4 ? bs * 64 + buffer : buffer, bc++ % 4) ? output += String.fromCharCode(255 & bs >> (-2 * bc & 6)) : 0) {
    buffer = CHARS.indexOf(buffer);
  }
  return output;
}
/**
 * Converts a Blob, ArrayBuffer or Uint8Array to a base64 string.
 */
function fromData(data) {
  if (data instanceof Blob) {
    const fileReader = new FileReader();
    const {
      resolve,
      reject,
      promise
    } = promiseDefer();
    fileReader.readAsDataURL(data);
    fileReader.onloadend = () => {
      if (fileReader?.result) {
        resolve?.({
          string: fileReader.result,
          format: 'data_url'
        });
      }
    };
    fileReader.onerror = event => {
      fileReader?.abort();
      reject?.(event);
    };
    return promise;
  }
  if (data instanceof ArrayBuffer || data instanceof Uint8Array) {
    return Promise.resolve({
      string: binaryToBase64(data),
      format: 'base64'
    });
  }
  throw new Error("'RNFirebase.Base64.fromData' failed: Unknown data type.");
}
export default {
  btoa,
  atob,
  fromData
};
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