hackpro-sdk
Version:
152 lines • 6.16 kB
JavaScript
"use strict";
/*
* Copyright 2018 balena.io
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file 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.
*/
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
// Can't use "import { constants, ReadStream, WriteStream } from 'fs';"
// as ReadStream and WriteStream are defined as interfaces in @types/node
// and are not imported in the generated js. They are classes, not interfaces.
const fs = require("fs");
const path_1 = require("path");
const progress_1 = require("./progress");
const source_destination_1 = require("./source-destination");
const block_read_stream_1 = require("../block-read-stream");
const constants_1 = require("../constants");
const fs_1 = require("../fs");
const sparse_write_stream_1 = require("../sparse-stream/sparse-write-stream");
exports.ProgressWriteStream = progress_1.makeClassEmitProgressEvents(
// type definitions for node 6 export fs.WriteStream as an interface, but it's a class.
// @ts-ignore
fs.WriteStream, 'bytesWritten', 'bytesWritten', constants_1.PROGRESS_EMISSION_INTERVAL);
// tslint:disable:no-bitwise
var OpenFlags;
(function (OpenFlags) {
OpenFlags[OpenFlags["Read"] = fs.constants.O_RDONLY] = "Read";
OpenFlags[OpenFlags["ReadWrite"] = fs.constants.O_RDWR | fs.constants.O_CREAT] = "ReadWrite";
OpenFlags[OpenFlags["WriteDevice"] = fs.constants.O_RDWR |
fs.constants.O_NONBLOCK |
fs.constants.O_SYNC] = "WriteDevice";
})(OpenFlags || (OpenFlags = {}));
// tslint:enable:no-bitwise
class File extends source_destination_1.SourceDestination {
constructor(path, flags) {
super();
this.path = path;
this.flags = flags;
this.blockSize = 512;
}
_canRead() {
return (this.flags === File.OpenFlags.Read ||
this.flags === File.OpenFlags.ReadWrite ||
this.flags === File.OpenFlags.WriteDevice);
}
_canWrite() {
return (this.flags === File.OpenFlags.ReadWrite ||
this.flags === File.OpenFlags.WriteDevice);
}
canRead() {
return __awaiter(this, void 0, void 0, function* () {
return this._canRead();
});
}
canWrite() {
return __awaiter(this, void 0, void 0, function* () {
return this._canWrite();
});
}
canCreateReadStream() {
return __awaiter(this, void 0, void 0, function* () {
return this._canRead();
});
}
canCreateWriteStream() {
return __awaiter(this, void 0, void 0, function* () {
return this._canWrite();
});
}
canCreateSparseWriteStream() {
return __awaiter(this, void 0, void 0, function* () {
return this._canWrite();
});
}
_getMetadata() {
return __awaiter(this, void 0, void 0, function* () {
return {
size: (yield fs_1.stat(this.path)).size,
name: path_1.basename(this.path),
};
});
}
read(buffer, bufferOffset, length, sourceOffset) {
return __awaiter(this, void 0, void 0, function* () {
return yield fs_1.read(this.fd, buffer, bufferOffset, length, sourceOffset);
});
}
write(buffer, bufferOffset, length, fileOffset) {
return __awaiter(this, void 0, void 0, function* () {
return yield fs_1.write(this.fd, buffer, bufferOffset, length, fileOffset);
});
}
createReadStream(emitProgress = false, start = 0, end) {
return __awaiter(this, void 0, void 0, function* () {
yield this.open();
if (emitProgress) {
return new block_read_stream_1.ProgressBlockReadStream(this, start, end);
}
else {
return new block_read_stream_1.BlockReadStream(this, start, end);
}
});
}
createWriteStream() {
return __awaiter(this, void 0, void 0, function* () {
const stream = new exports.ProgressWriteStream(null, {
fd: this.fd,
autoClose: false,
});
stream.on('finish', stream.emit.bind(stream, 'done'));
return stream;
});
}
createSparseWriteStream() {
return __awaiter(this, void 0, void 0, function* () {
const stream = new sparse_write_stream_1.ProgressSparseWriteStream(this);
stream.on('finish', stream.emit.bind(stream, 'done'));
return stream;
});
}
_open() {
return __awaiter(this, void 0, void 0, function* () {
this.fd = yield fs_1.open(this.path, this.flags);
});
}
_close() {
return __awaiter(this, void 0, void 0, function* () {
yield fs_1.close(this.fd);
});
}
}
exports.File = File;
File.OpenFlags = OpenFlags;
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