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Code Issues Releases Wiki Activity

Fix ESLint errors with computeHashOfFile

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Brett Sun 2016-06-13 14:55:43 +02:00
parent f814a6ceb5
commit 63310c5717
1 changed files with 16 additions and 19 deletions
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35
js/utils/file.js
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@ -1,5 +1,3 @@
'use strict';
import Q from 'q'; import Q from 'q';
import SparkMD5 from 'spark-md5'; import SparkMD5 from 'spark-md5';
import Moment from 'moment'; import Moment from 'moment';
@ -17,43 +15,42 @@ export { extractFileExtensionFromString, extractFileExtensionFromUrl } from 'js-
*/ */
export function computeHashOfFile(file) { export function computeHashOfFile(file) {
return Q.Promise((resolve, reject, notify) => { return Q.Promise((resolve, reject, notify) => {
let blobSlice = File.prototype.slice || File.prototype.mozSlice || File.prototype.webkitSlice; const blobSlice = File.prototype.slice || File.prototype.mozSlice || File.prototype.webkitSlice;
let chunkSize = 2097152; // Read in chunks of 2MB const chunkSize = 2097152; // Read in chunks of 2MB
let chunks = Math.ceil(file.size / chunkSize); const chunks = Math.ceil(file.size / chunkSize);
const spark = new SparkMD5.ArrayBuffer();
const fileReader = new FileReader();
const startTime = new Moment();
let currentChunk = 0; let currentChunk = 0;
let spark = new SparkMD5.ArrayBuffer();
let fileReader = new FileReader();
let startTime = new Moment();
// comment: We should convert this to es6 at some point, however if so please consider that // comment: We should convert this to es6 at some point, however if so please consider that
// an arrow function will get rid of the function's scope... // an arrow function will get rid of the function's scope...
fileReader.onload = function(e) { fileReader.onload = (e) => {
//console.log('read chunk nr', currentChunk + 1, 'of', chunks); // console.log('read chunk nr', currentChunk + 1, 'of', chunks);
spark.append(e.target.result); // Append array buffer spark.append(e.target.result); // Append array buffer
currentChunk++; currentChunk++;
if (currentChunk < chunks) { if (currentChunk < chunks) {
loadNext(); loadNext();
} else { } else {
let fileHash = spark.end(); const fileHash = spark.end();
console.info('computed hash %s (took %d s)', console.info('computed hash %s (took %d s)',
fileHash, fileHash,
Math.round(((new Moment() - startTime) / 1000) % 60)); // Compute hash Math.round(((new Moment() - startTime) / 1000) % 60)); // Compute hash
let blobTextFile = makeTextFile(fileHash, file); resolve(makeTextFile(fileHash, file));
resolve(blobTextFile);
} }
}.bind(this); };
fileReader.onerror = function () { fileReader.onerror = () => {
reject(new Error(getLangText('We weren\'t able to hash your file locally. Try to upload it manually or consider contact us.'))); reject(new Error(getLangText("We weren't able to hash your file locally. Try to " +
'upload it manually or consider contact us.')));
}; };
function loadNext() { function loadNext() {
var start = currentChunk * chunkSize, const start = currentChunk * chunkSize;
end = ((start + chunkSize) >= file.size) ? file.size : start + chunkSize; const end = ((start + chunkSize) >= file.size) ? file.size : start + chunkSize;
// send progress // send progress
// Due to the fact that progressHandler and notify are going to be removed in v2 // Due to the fact that progressHandler and notify are going to be removed in v2