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Taking javascript input

I am developing a CLI using Enquirer. I want user of the CLI to write javascript on a json.
So, i want something like this :
Create a Rule on the the data
const model = {
reviews: {
'5': [
{
customerId: 'A2OKPZ5S9F78PD',
rating: '5',
asin: 'asin2',
reviewStatus: 'APPROVED',
reviewId: 'R379DKACZQRXME',
},
],
'4': [
{
customerId: 'A2OKPZ5S9F78PD',
rating: '4',
asin: 'asin2',
reviewStatus: 'APPROVED',
reviewId: 'R379DKACZQRXME',
},
],
},
entityType: 'LIVE_EVENT',
entityId: 'event2',
};
Then user writes the rule.
Object.values(model.reviews).forEach(reviews =>
(reviews as any).forEach(review => {
if (parseInt(review.rating) < 3 && attributes.reviewId.Value.includes(review.reviewId)) {
output.push({
exceptionName: `Customer ${review.customerId} left a review ${review.reviewId} with rating ${review.rating}`,
});
}
})
);
While writing this rule, Since it is on the above json model, I want to provide autocomplete options on javascript and validate if it is correct javascript.
Is there a way to do this ?

If I'm understanding your question correctly, it sounds like you want to take the model object and write it to a JSON file.
If this is your goal, simply do the following:
import { writeFileSync } from "fs";
// Define the model
const model: any = { foo: bar };
// Transform the model object to JSON
const modelJSON: string = JSON.stringify(model, null, 4); // Indents the JSON 4-spaces
// Write the modelJSON to `model.json`
writeFileSync("./model.json", modelJSON);
The above is TypeScript, but the standard JavaScript version is basically the same. Make sure you add #types/node to your package.json file if you're using TypeScript - hope this helps!

Problem generating buffer for nodejs csv file creation

Iam able to generate a csv file with the data below. I am using a nodejs library "csv-writer" that generates the file quite well. My problem is that I need a way to return back a buffer instead of the file itself. Reason being I need to upload the file to a remote server via sftp.
How do I go ab bout modifying this piece of code to enable buffer response? Thanks.
...
const csvWriter = createCsvWriter({
path: 'AuthHistoryReport.csv',
header: [
{id: 'NAME', title: 'msg_datetime_date'},
{id: 'AGE', title: 'msg_datetime'}
]
});
var rows = [
{ NAME: "Paul", AGE:21 },
{ NAME: "Charles", AGE:28 },
{ NAME: "Teresa", AGE:27 },
];
csvWriter
.writeRecords(rows)
.then(() => {
console.log('The CSV file was written successfully');
});
...

Read your own file with fs.readFile('AuthHistoryReport.csv', data => ... );. If you don't specify an encoding, then the returned data is a buffer, not a string.
fs.readFile('AuthHistoryReport.csv', 'utf8', data => ... ); Returns a string
fs.readFile('AuthHistoryReport.csv', data => ... ); Returns a buffer
Nodejs file system #fs.readFile

You need to store your created file in a buffer using the native package fs
const fs = require('fs');
const buffer = fs.readFileSync('AuthHistoryReport.csv');

Parsing Excel sheet in Hebrew (.xlsx) to JSON produces question marks

I'm trying to parse Excel (*.xlsx) to a JSON object in Node JS , however all the columns with Hebrew characters are converted with question marks.
For example :
Here's the code :
"use strict";
const excelToJson = require("convert-excel-to-json");
// -> Read Excel File to Json Data
const excelData = excelToJson({
sourceFile: "customers.xlsx",
sheets: [
{
// Excel Sheet Name
name: "Customers",
header: {
rows: 1
}
}
]
});
Any idea how to fix it ?

I believe it's only your console that's showing invalid characters. Try dumping the excel file contents to file like so:
"use strict";
const excelToJson = require("convert-excel-to-json");
// -> Read Excel File to Json Data
const excelData = excelToJson({
sourceFile: "customers.xlsx",
sheets: [
{
// Excel Sheet Name
name: "Customers",
header: {
rows: 1
}
}
]
});
const fs = require("fs");
fs.writeFileSync("customers.json", JSON.stringify(excelData));
Then open in say Notepad++. You should see the Hebrew characters correctly. I'm getting exactly this behaviour. I see invalid characters in the command window, but it's all good when I open the customers.json file.
e.g.
{"Customers":[{"A":"לקוח 1"},{"A":"לקוח 2"}]}

How to make complex Json fit a Javascript object

The backend of my webapp, written in node.js interacts with Json file, with a specific format that I thought not so complex but apparently is.
The structure of my json file is as such :
{
"data": [
{
"somefield": "ioremipsum",
"somedate" : "2018-08-23T11:48:00Z",
"someotherdate" : "2018-08-23T13:43:00Z",
"somethingelse":"ioremipsum",
"files": [
{
"specificfieldinarray": "ioremipsum",
"specificotherfieldinarray": "ioremipsum"
},
{
"specificfieldinarray": "ioremipsum",
"specificotherfieldinarray": "ioremipsum"
},
{
"specificfieldinarray": "ioremipsum",
"specificotherfieldinarray": "ioremipsum"
}
]
}
]
}
I try to make this answer fit a JS object like this :
const file = require('specificJsonFile.json');
let fileList = file;
And I need to loop through my 'files' array, for further treatments, but unfortunately, my JS object looks like this :
{ data:
[ { somefield: "ioremipsum",
somedate : "2018-08-23T11:48:00Z",
someotherdate : "2018-08-23T13:43:00Z",
somethingelse:"ioremipsum",
files: [Array] } ] }
Please forgive me if this is obvious, for I am still a beginner with JS.

That's only how console.log logs deep objects. To get a deeper output, you can use util.inspect
const util = require('util');
console.log(util.inspect(yourObject, {showHidden: false, depth: null}));
To loop each data's files, simply loop data, then its files
yourObject.data.forEach(d => {
d.files.forEach(file => console.log(file));
});

It looks like there is nothing wrong there and the console is abbreviating the log.
Try accessing the files list with the following code:
const filesList = file.data[0].files
and then
console.log(filesList) to check that it's eventually working.
Hope it helps!

let fileList = file.data[0].files;
This will create an array of only your files array.
You can console.log(fileList)
Or whatever you like with the data.
Based on your comment, try the of keyword instead of in keyword to get the behaviour you expected.
for (let file of fileList){
console.log(file);
}
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...of

You can use for in
for (item in fileList.data) {
for (file in fileList.data[item].files) {
let data = fileList.data[item].files[file];
// process the data
}
}

Writing text to File in Node.JS

I'm new to Node.js. I have a JSON object which looks like the following:
var results = [
{ key: 'Name 1', value: '1' },
{ key: 'Name 2', value: '25%' },
{ key: 'Name 3', value: 'some string' },
...
];
The above object may or may not have different values. Still, I need to get them into a format that looks exactly like the following:
{"Name 1":"1","Name 2":"25%","Name 3":"some string"}
In other words, I'm looping through each key/value pair in results and adding it to a single line. From my understanding this single line approach (with double quotes) is called "JSON Event" syntax. Regardless, I have to print my JSON object out in that way into a text file. If the text file exists, I need to append to it.
I do not know how to append to a text file in Node.js. How do I append to a text file in Node.js?
Thank you!

You can use JSON.stringify to convert a JavaScript object to JSON and fs.appendFile to append the JSON string to a file.
// write all the data to the file
var fs = require('fs');
var str = JSON.stringify(results);
fs.appendFile('file.json', str, function(err) {
if(err) {
console.log('there was an error: ', err);
return;
}
console.log('data was appended to file');
});
If you want to add just one item at a time, just do
// Just pick the first element
var fs = require('fs');
var str = JSON.stringify(results[0]);