chore: comments

Author: raul-casallas

src/job-client.js

@@ -471,8 +471,8 @@ class JobClient{
     }
 
     /**
-     * Call the Modzy API Service that return the jobs features
-     * @return {Object} a updated job instance
+     * Call Modzy's API Service to return job features
+     * @return {Object} An updated job instance
      * @throws {ApiError} If there is something wrong with the sevice or the call
      */
     getFeatures(){

src/utils.js

@@ -0,0 +1,45 @@
+const fs = require('fs');
+
+function readBytes(fd, sharedBuffer) {
+    return new Promise((resolve, reject) => {
+        fs.read(
+            fd,
+            sharedBuffer,
+            0,
+            sharedBuffer.length,
+            null,
+            (err) => {
+                if(err) { return reject(err); }
+                resolve();
+            }
+        );
+    });
+}
+
+async function* fileToChunks(filePath, size) {
+    const sharedBuffer = Buffer.alloc(size);
+    const stats = fs.statSync(filePath);
+    const fd = fs.openSync(filePath, "r");
+    let bytesRead = 0;
+    let end = size;
+    for(let i = 0; i < Math.ceil(stats.size / size); i++) {
+        await readBytes(fd, sharedBuffer);
+        bytesRead = (i + 1) * size;
+        if(bytesRead > stats.size) {
+            end = size - (bytesRead - stats.size);
+        }
+        yield sharedBuffer.slice(0, end);
+    }
+    fs.closeSync(fd);
+}
+
+async function* byteArrayToChunks(byteArray, size) {
+    for(let i = 0; i < byteArray.length; i += size) {
+        yield byteArray.slice(i, i+size);
+    }
+}
+
+module.exports = {
+    byteArrayToChunks,
+    fileToChunks
+};