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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
export class FileUtils {
static '$inject' = [
'$window'
];
constructor(private $window:any) {
}
public byteCharactersToBlob = (byteCharacters, contentType):any => {
contentType = contentType || '';
let sliceSize = 1024;
let bytesLength = byteCharacters.length;
let slicesCount = Math.ceil(bytesLength / sliceSize);
let byteArrays = new Array(slicesCount);
for (let sliceIndex = 0; sliceIndex < slicesCount; ++sliceIndex) {
let begin = sliceIndex * sliceSize;
let end = Math.min(begin + sliceSize, bytesLength);
let bytes = new Array(end - begin);
for (let offset = begin, i = 0; offset < end; ++i, ++offset) {
bytes[i] = byteCharacters[offset].charCodeAt(0);
}
byteArrays[sliceIndex] = new Uint8Array(bytes);
}
return new Blob(byteArrays, {type: contentType});
};
public base64toBlob = (base64Data, contentType):any => {
let byteCharacters = atob(base64Data);
return this.byteCharactersToBlob(byteCharacters, contentType);
};
public downloadFile = (blob, fileName):void=> {
let url = this.$window.URL.createObjectURL(blob);
let downloadLink = document.createElement("a");
downloadLink.setAttribute('href', url);
downloadLink.setAttribute('download', fileName);
document.body.appendChild(downloadLink);
var clickEvent = new MouseEvent("click", {
"view": window,
"bubbles": true,
"cancelable": true
});
downloadLink.dispatchEvent(clickEvent);
}
}
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