hackpro-sdk
Version:
59 lines • 2.62 kB
JavaScript
;
/*
* 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 });
const source_destination_1 = require("./source-destination");
const errors_1 = require("../errors");
const stream_limiter_1 = require("../stream-limiter");
class SingleUseStreamSource extends source_destination_1.SourceDestination {
constructor(stream) {
super();
this.stream = stream;
this.used = false;
}
canCreateReadStream() {
return __awaiter(this, void 0, void 0, function* () {
return !this.used;
});
}
createReadStream(_emitProgress = false, start = 0, end) {
return __awaiter(this, void 0, void 0, function* () {
if (this.used) {
throw new errors_1.NotCapable('Single use source stream already used');
}
if (start !== 0) {
throw new errors_1.NotCapable("Can't seek in a single use stream");
}
let stream = this.stream;
if (end !== undefined) {
stream = new stream_limiter_1.StreamLimiter(stream, end + 1);
}
this.used = true;
return stream;
});
}
}
exports.SingleUseStreamSource = SingleUseStreamSource;
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