kura/lib/BinaryConverter.js

The FileSystem API abstraction library.

"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.toBase64 = exports.toBlob = exports.toArrayBuffer = exports.toBuffer = exports.isBuffer = exports.isUint8Array = exports.isBlob = void 0;
const ba = __importStar(require("base64-arraybuffer"));
const FileSystemConstants_1 = require("./FileSystemConstants");
const FileSystemUtil_1 = require("./FileSystemUtil");
const CHUNK_SIZE = 96 * 1024;
function decode(str) {
    return ba.decode(str);
}
function encode(buffer) {
    return ba.encode(buffer);
}
function isBlob(value) {
    return value instanceof Blob || toString.call(value) === "[object Blob]";
}
exports.isBlob = isBlob;
function isUint8Array(value) {
    return (value instanceof Uint8Array ||
        toString.call(value) === "[object Uint8Array]");
}
exports.isUint8Array = isUint8Array;
function isBuffer(value) {
    return (typeof value?.constructor?.isBuffer === "function" &&
        value.constructor.isBuffer(value));
}
exports.isBuffer = isBuffer;
function concatArrayBuffers(chunks, byteLength) {
    const u8 = new Uint8Array(byteLength);
    let pos = 0;
    for (const chunk of chunks) {
        u8.set(new Uint8Array(chunk), pos);
        pos += chunk.byteLength;
    }
    return u8.buffer;
}
async function blobToArrayBufferUsingReadAsArrayBuffer(blob) {
    if (blob.size === 0) {
        return new ArrayBuffer(0);
    }
    let byteLength = 0;
    const chunks = [];
    for (let start = 0, end = blob.size; start < end; start += CHUNK_SIZE) {
        const blobChunk = blob.slice(start, start + CHUNK_SIZE);
        const chunk = await new Promise((resolve, reject) => {
            const reader = new FileReader();
            reader.onerror = (ev) => {
                reject(reader.error || ev);
            };
            reader.onload = () => {
                const chunk = reader.result;
                byteLength += chunk.byteLength;
                resolve(chunk);
            };
            reader.readAsArrayBuffer(blobChunk);
        });
        chunks.push(chunk);
    }
    return concatArrayBuffers(chunks, byteLength);
}
async function blobToArrayBufferUsingReadAsDataUrl(blob) {
    const base64 = await blobToBase64(blob);
    if (!base64) {
        return new ArrayBuffer(0);
    }
    return base64ToArrayBuffer(base64);
}
async function blobToBuffer(blob) {
    const arrayBuffer = await blobToArrayBuffer(blob);
    return Buffer.from(arrayBuffer);
}
async function blobToArrayBuffer(blob) {
    if (blob.size === 0) {
        return new ArrayBuffer(0);
    }
    let buffer;
    if (navigator && navigator.product === "ReactNative") {
        buffer = await blobToArrayBufferUsingReadAsDataUrl(blob);
    }
    else {
        buffer = await blobToArrayBufferUsingReadAsArrayBuffer(blob);
    }
    return buffer;
}
function base64ToBuf(base64) {
    return Buffer.from(base64, "base64");
}
function base64ToBuffer(base64) {
    const chunks = [];
    let byteLength = 0;
    for (let start = 0, end = base64.length; start < end; start += CHUNK_SIZE) {
        const base64chunk = base64.substr(start, CHUNK_SIZE);
        const chunk = base64ToBuf(base64chunk);
        byteLength += chunk.byteLength;
        chunks.push(chunk);
    }
    const buffer = Buffer.alloc(byteLength);
    let pos = 0;
    for (const chunk of chunks) {
        buffer.set(chunk, pos);
        pos += chunk.byteLength;
    }
    return buffer;
}
function base64ToArrayBuffer(base64) {
    let byteLength = 0;
    const chunks = [];
    for (let start = 0, end = base64.length; start < end; start += CHUNK_SIZE) {
        const base64chunk = base64.substr(start, CHUNK_SIZE);
        const chunk = decode(base64chunk);
        byteLength += chunk.byteLength;
        chunks.push(chunk);
    }
    return concatArrayBuffers(chunks, byteLength);
}
function uint8ArrayToArrayBuffer(view) {
    const viewLength = view.length;
    const buffer = view.buffer;
    if (viewLength === buffer.byteLength) {
        return buffer;
    }
    const newBuffer = new ArrayBuffer(viewLength);
    const newView = new Uint8Array(newBuffer);
    for (let i = 0; i < viewLength; i++) {
        newView[i] = view[i];
    }
    return newBuffer;
}
async function toBuffer(content) {
    if (!content) {
        return Buffer.from([]);
    }
    let buffer;
    if (typeof content === "string") {
        buffer = base64ToBuffer(content);
    }
    else if (isBlob(content)) {
        buffer = await blobToBuffer(content);
    }
    else if (isBuffer(content)) {
        buffer = content;
    }
    else if (ArrayBuffer.isView(content)) {
        buffer = Buffer.from(content.buffer, content.byteOffset, content.byteLength);
    }
    else {
        buffer = Buffer.from(content);
    }
    return buffer;
}
exports.toBuffer = toBuffer;
async function toArrayBuffer(content) {
    if (!content) {
        return new ArrayBuffer(0);
    }
    let buffer;
    if (typeof content === "string") {
        buffer = base64ToArrayBuffer(content);
    }
    else if (isBlob(content)) {
        buffer = await blobToArrayBuffer(content);
    }
    else if (isBuffer(content)) {
        buffer = content.buffer.slice(content.byteOffset, content.byteOffset + content.byteLength);
    }
    else if (ArrayBuffer.isView(content)) {
        buffer = uint8ArrayToArrayBuffer(content);
    }
    else {
        buffer = content;
    }
    return buffer;
}
exports.toArrayBuffer = toArrayBuffer;
function base64ToBlob(base64, type = FileSystemConstants_1.DEFAULT_CONTENT_TYPE) {
    try {
        const buffer = base64ToArrayBuffer(base64);
        return new Blob([buffer], { type });
    }
    catch (e) {
        console.warn(e, base64);
        return new Blob([], FileSystemConstants_1.DEFAULT_BLOB_PROPS);
    }
}
function toBlob(content) {
    if (!content) {
        return new Blob([], FileSystemConstants_1.DEFAULT_BLOB_PROPS);
    }
    let blob;
    if (typeof content === "string") {
        blob = base64ToBlob(content);
    }
    else if (isBlob(content)) {
        blob = content;
    }
    else {
        blob = new Blob([content]);
    }
    return blob;
}
exports.toBlob = toBlob;
async function blobToBase64(blob) {
    if (blob.size === 0) {
        return "";
    }
    const chunks = [];
    for (let start = 0, end = blob.size; start < end; start += CHUNK_SIZE) {
        const blobChunk = blob.slice(start, start + CHUNK_SIZE);
        const chunk = await new Promise((resolve, reject) => {
            const reader = new FileReader();
            reader.onerror = function (ev) {
                reject(reader.error || ev);
            };
            reader.onload = function () {
                const base64 = (0, FileSystemUtil_1.dataUrlToBase64)(reader.result);
                resolve(base64);
            };
            reader.readAsDataURL(blobChunk);
        });
        chunks.push(chunk);
    }
    return chunks.join("");
}
function arrayBufferToBase64(ab) {
    return encode(ab);
}
function uint8ArrayToBase64(u8) {
    const chunks = [];
    for (let start = 0, end = u8.byteLength; start < end; start += CHUNK_SIZE) {
        const u8Chunk = u8.slice(start, start + CHUNK_SIZE);
        const abChunk = uint8ArrayToArrayBuffer(u8Chunk);
        const chunk = arrayBufferToBase64(abChunk);
        chunks.push(chunk);
    }
    const base64 = chunks.join("");
    return base64;
}
function bufferToBase64(buffer) {
    const chunks = [];
    for (let start = 0, end = buffer.byteLength; start < end; start += CHUNK_SIZE) {
        const bufferChunk = buffer.slice(start, start + CHUNK_SIZE);
        const chunk = bufferChunk.toString("base64");
        chunks.push(chunk);
    }
    const base64 = chunks.join("");
    return base64;
}
async function toBase64(content) {
    if (!content) {
        return "";
    }
    let base64;
    if (typeof content === "string") {
        base64 = content;
    }
    else if (isBlob(content)) {
        base64 = await blobToBase64(content);
    }
    else if (isBuffer(content)) {
        base64 = bufferToBase64(content);
    }
    else if (ArrayBuffer.isView(content)) {
        base64 = uint8ArrayToBase64(content);
    }
    else {
        base64 = uint8ArrayToBase64(new Uint8Array(content));
    }
    return base64;
}
exports.toBase64 = toBase64;
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