Unresolved Promise Assistance Node.js - node.js

Question

I have the following code below, which is a lambda function to get content from a s3Object zip file. I know for a fact that I am not resolving the list of promises and need a little direction on how to resolve. I have read several codes on here but having a hard time applying it to my code. Any assistance would be greatly appreciated.
// dependencies
const AWS = require('aws-sdk');
var JSZip = require('jszip');
// get reference to S3 client
const s3 = new AWS.S3();
exports.handler = async (event, context, callback) => {
// Read options from the event parameter.
const srcBucket = event.Records[0].s3.bucket.name;
// Object key may have spaces or unicode non-ASCII characters.
const srcKey = decodeURIComponent(event.Records[0].s3.object.key.replace(/\+/g, " "));
// Download the file from the S3 source bucket.
try {
const params = {
Bucket: srcBucket,
Key: srcKey
};
const data = await s3.getObject(params).promise();
var zip = JSZip.loadAsync(data.Body).then(function (content){
return content;
});
zip.then(function(result){
var entries = Object.keys(result.files).map(function (name) {
if(name.indexOf("TestStatus") != -1){
return name;
}
}).filter(notUndefined => notUndefined !== undefined);
var listOfPromises = entries.map(function(entry) {
return result.file(entry).async("text").then(function(fileContent){
return fileContent;
});
});
Promise.all(listOfPromises).then((values) =>{
values.forEach(function(value){
console.log(value);
});
});
});
} catch (error) {
context.fail(error);
return;
}
};
Modified/Corrected code
// dependencies
const AWS = require('aws-sdk');
var JSZip = require('jszip');
// get reference to S3 client
const s3 = new AWS.S3();
exports.handler = async (event, context, callback) => {
// Read options from the event parameter.
const srcBucket = event.Records[0].s3.bucket.name;
// Object key may have spaces or unicode non-ASCII characters.
const srcKey = decodeURIComponent(event.Records[0].s3.object.key.replace(/\+/g, " "));
// Download the file from the S3 source bucket.
try {
const params = {
Bucket: srcBucket,
Key: srcKey
};
const data = await s3.getObject(params).promise();
var zip = JSZip.loadAsync(data.Body);
return zip.then(function(result){
var entries = Object.keys(result.files).map((name) =>{
if(name.indexOf("TestStatus") != -1){
return result.files[name];
}
}).filter(notUndefined => notUndefined !== undefined);
var listOfPromises = entries.map((entry) => {
return entry.async("text")
.then((u8) => {
return [entry.name, u8];
}).catch(error => console.error(error));
});
var promiseOfList = Promise.all(listOfPromises);
promiseOfList.then(function (list) {
console.log(list.toString());
});
});
} catch (error) {
context.fail(error);
return;
}
};

Answer 1

If you look closely you are not retuning anything it is why it stays on Pending
const AWS = require('aws-sdk');
var JSZip = require('jszip');
// get reference to S3 client
const s3 = new AWS.S3();
exports.handler = async (event, context, callback) => {
// Read options from the event parameter.
const srcBucket = event.Records[0].s3.bucket.name;
// Object key may have spaces or unicode non-ASCII characters.
const srcKey = decodeURIComponent(event.Records[0].s3.object.key.replace(/\+/g, " "));
// Download the file from the S3 source bucket.
try {
const params = {
Bucket: srcBucket,
Key: srcKey
};
const data = await s3.getObject(params).promise();
// here is the problem
// var zip = JSZip.loadAsync(data.Body).then(function (content){
// return content;
// }
var zip = await JSZip.loadAsync(data.body)
return zip.then(function(result){
var entries = Object.keys(result.files).map(function (name) {
if(name.indexOf("TestStatus") != -1){
return name;
}
}).filter(notUndefined => notUndefined !== undefined);
var listOfPromises = entries.map(function(entry) {
return result.file(entry).async("text").then(function(fileContent){
return fileContent;
});
});
console.log("Helo");
Promise.all(listOfPromises).then((values) =>{
values.forEach(function(value){
console.log(value);
});
});
});
} catch (error) {
context.fail(error);
return;
}
};
```