I'm working on a discord bot right now that reads responses off of a JSON file. The basic format is as follows:
"matt":
{
"insults" : ["test 1",
"test 2",
"test 3",
"test 4"
]
},
I'm currently working on a function that allows a user to use the !addInsult command, followed by a string, which will then append onto the existing array.
My desired workflow is as such:
User types in the following: !addInsult test 5. This would then modify the JSON object of insults under matt to the following:
"matt":
{
"insults" : ["test 1",
"test 2",
"test 3",
"test 4",
"test 5"
]
},
Doing this will allow me to let my friends add data to my bot without needing me to manually edit the JSON every time we want something new.
What would the best way of going about this be? I've looked into this thing called push, but I don't really understand how that works.
This is what I have so far. I think I'm going in the right direction, but I'm not sure:
The following is established at the beginning of the script:
// contains the insults
var insults = require('./insults.json');
// get the insults from the json file specific to user
var insultsString = JSON.stringify(insults);
var json = JSON.parse(insultsString);
And here is the function that will be doing appending:
// command that allows users to add to the pool of insults
function addInsultCommand(args, receivedMessage)
{
// create an object that contains the information for the json file
json["bot"].push(["test"]);
receivedMessage.channel.send(json.matt.insults[0]);
}
so there is a misconception here; JS does not write to files.
You're using webpack, which let's you require the .json using a webpack loader, but this will ONLY work when using the dev server. This will not work when distributing your code, because the .json will will be encoded into your output bundle.
.js can not write a file for you ( except locally ), so what you need to do is two fold:
1) Download the .json from the webserver, without using a webpack loader.
2) modify the JSON data in memory
3) upload the JSON data to the web server for it to write the file for you.
In addition to this, I can not follow your example code. you reference receivedMessage.channel.send, but I do not see where this is defined. Is this some kind of discord integration? You may need to re-state your question along with a minimal proof of the issue with reproducible test code.
JSON.stringify will turn a javascript object into a JSON object. JSON.parse will do the opposite(turn a JSON object into a Javascript object). Assuming insults.json is a json object, you do not need to convert it into a string. You can just do JSON.parse(insults) to convert it into a javascript object.
I am not sure what you were intending to do with the args variable in addInsultCommand but I am going to ignore for now and give you some steps to follow below.
1) Turn JSON object(insults) into JS object
2) create a function that takes a JS object and a receivedMessage(the insult to add) and assigns it to the correct place in the JS object.
3) convert the JS object into JSON(using JSON.stringify) and replace the contents of insults.json with the the updated value.
Related
How can I create a function that loops through a folder in my directory called "data." It contains only image files, and I will keep adding more image files to it. Previously, I was using the following function that returns an array of URLs:
function _image_urls(){return(
[
"https://images.pexels.com/photos/4050284/pexels-photo-4050284.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1",
"https://images.pexels.com/photos/1323550/pexels-photo-1323550.jpeg?auto=compress&cs=tinysrgb&w=600",
"https://images.pexels.com/photos/2002719/pexels-photo-2002719.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1",
"https://images.pexels.com/photos/919606/pexels-photo-919606.jpeg?auto=compress&cs=tinysrgb&w=600",
"https://images.pexels.com/photos/1983038/pexels-photo-1983038.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1",
"https://images.pexels.com/photos/1702624/pexels-photo-1702624.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1",
"https://images.pexels.com/photos/3631430/pexels-photo-3631430.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1",
"https://images.pexels.com/photos/5011647/pexels-photo-5011647.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1",
"https://images.pexels.com/photos/135018/pexels-photo-135018.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1",
"https://images.pexels.com/photos/161154/stained-glass-spiral-circle-pattern-161154.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=1"
]
)}
I'm trying to create a function that returns an array of paths for all the images in the data folder. I have been trying the following approach:
function _image_urls(){
const image_folder = 'data';
const image_extension = '.jpg';
let image_urls = [];
for (let i = 0; i < 10; i++) {
let image_url = image_folder + i + image_extension;
image_urls.push(image_url);
}
return image_urls;
}
It seems like this will just return an array like:
[
"data0.jpg",
"data1.jpg",
"data2.jpg",
"data3.jpg",
"data4.jpg",
"data5.jpg",
"data6.jpg",
"data7.jpg",
"data8.jpg",
"data9.jpg"
]
If that's what you're getting, then you need to use i as the index for an array that contains the file names.
The bigger question is how are you getting that list of files in the first place? This is generally not something that JavaScript can do on its own. If the files exist on the server, you'd need some server-side script to actually access the folder and output the array of file names - this can then be put into an array several ways (either writing it directly to the code if you allow your server side code to process the JS file or probably more likely using an XHR to request the file names and then populate the array when you get the response.)
If you write this server side script such that it formats the output as JSON, then it could simply be a matter of using JSON.parse() to convert the output to an array directly without any need to iterate over the response such as the function in the question.
EDIT/UPDATE after comment from OP:
Since you're using PHP on the server side, I would create a server side script that readers the contents of the "Data" folder and outputs a JSON formatted string which can then be parsed by the JS on the front end.
In general, this is done using the scandir function. See https://www.php.net/manual/en/function.scandir.php for details.
and the steps would be as follows:
Use scandir to get an array of files in the Data folder
Remove the first two items in the array (. and ..)
Use the json_encode function to convert the array to a JSON formatted string
Echo that string
Then on the page where you have your JS you have two options:
Include the PHP script described above such that it becomes a JS array using JSON.parse().
Use an XHR to request the PHP script, and when you get a response use JSON.parse() to set it as an array variable.
The first method is outdated, but very simple - though it does require that your JS code is parsed by PHP which may or may not be possible/advisable depending on your server configuration.
The second method is probably what you should do, as long as you're fine with the array being populated after the page loads and that you wait for the XHR to complete before calling any functions that rely on the array.
The main thing to know here is that what you want to do is not possible using only JavaScript because JS cannot read the contents of a folder on the server. Your JS will need to interact with some server side code in order to read the contents of a folder into any array.
my website relies on a database which is a big JSON file like this:
var myjsonData =
[ {
"ID": 0,
"name": "Henry",
"surname": "McLarry",
"...": "...",
}]
I do generate this data every month at high cost to me, therefore I would like to avoid calling it straight in my html <head>, because this will allow any user to download the full database in no time.
I would like to build a "something" that can only call specific items from the json file (just the only one I want to show) without "exposing" the full .json onto client side.
today I use the call
var myvar= myjsonData.ID.Name
to get "Henry" into myvar, I would like to build something like
var myvar = mycallfunction(ID,Name)
I did try with PHP as intermediary but the ajax calls from javacript doesn't allow me to fetch the data.
Can I use JQuery with the JSON Url to get only the item I need?
What you can do is parse your json for an object. So you can get any value you want from json.
Example:
var myjsonData = '{"ID": 0,"name": "Henry","surname": "McLarry"}';
obj = JSON.parse(myjsonData);
console.log(myjsonData.ID); //print the id
console.log(myjsonData.name); //print the name
console.log(myjsonData.surname); //print the surname
So you have a NoSQL Database which has only one kind of Document that is the full JSON element you use in your website. In that scenario you have three options:
Depending on the NoSQL Database you're using you can limit the fields which will be returned(I.e: For MongoDB you can look here: https://docs.mongodb.com/manual/tutorial/project-fields-from-query-results/)
Change the way you store you data into more modular documents and make the logic to connect them in you application. So instead of one big document you'll have modular ones as Users, Products, Transactions and etc and you can use your application to query them individually.
Build a Server Side logic as an API to deal with your data and provide only what you need, so the API(Which can be node.js, php, or any you may like) will get the full JSON it`s endpoints will only the data you want. For example: myapi.com/getUser, myapi.com/getProducts and so on.
If you're able to provide more info on the technologies you're using that would help us. Hope that helped :).
I have been traversing through Stackoverflow and everywhere else on the web to try and find a solution to my issue..
I am working in Javascript and attempting to POST a small section of JSON to an endpoint in the API i know is working (I have completes the GET and POST manually in Postman)
Here is my issue..
I want dont really want to do the "GET" in my programme I just want to either reference the file or even just store it in a little variable.
So for example I have in my code:
var OauthUpload = {
"objects": [
{
"name": "api",
"serviceID": 16,
"properties": {}
}
],
"version": "integration",
"environment": "redshift"
}
Then I am trying to reference this in the JS function:
function ApiPostOauth (port) {
$.post(OauthUpload, "http://docker.dc.test.com:" + getActualPort(port) + "/rest/v1/oauth/import", runner);
}
But I am having no joy! I have seen a few different silutions but none seem to fit for me.
Basically I want a way to just:
Reference my own JSON as a variable and then insert tht so my function "ApiPostOauth" has that inserted before it runs?
Thanks guys
Steve
I have put together an example for your use. When executing this code, the server will return the same object it is sent. So the 'OauthUpload` object is sent as the request body and the server returns the exact same object. Note: if you don't see output in the output panel when running the sample I will need to restart the server (leave a comment). This is here to demonstrate:
[EDIT] - after re-reading your question, it appears you would like to pass the 'OauthUpload` object into the function. I've updated the example.
You have a mistake in your call to jQuery post() method. As shown in the comments, the first two arguments are reversed in the call to post().
Since you didn't pick up on that, I decided to provide an example using your code. Since I don't have your server, I stood up a server for this example. So the URL and port will be different, but the AJAX call will be the same.
Please pay close attention to the OauthUpload object. Notice the property names are no longer surrounded by ". I removed these quotes because they seemed to be causing you confusion about JavaScript objects and JSON strings (there is no such thing as a JSON Object regardless of what you read on the web - JSON is a string format).
Next, look at the differences between the call made to $.post() in my example and your code. You will see the URL comes first in that call.
let url = "//SimpleCORSEnabledServer--randycasburn.repl.co/rest/v1/oauth/import";
let OauthUpload = {
objects: [{
name: "api",
serviceID: 16,
properties: {}
}],
version: "integration",
environment: "redshift"
}
ApiPostOauth(OauthUpload);
function ApiPostOauth(data) {
$.post(url, data, runner)
}
function runner(data) {
document.querySelector('pre').textContent = JSON.stringify(data, null, 2);
}
<pre></pre>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
I'm sending a JS object from my front-end to my Java backend, and I'm passing a object like so, which contains different types
wrapperObject = {
JSONOBJ = {
'key': 'value'
},
id: '123',
date: 'exampledate'
}
My java backend then takes this wrapperObject and converts every field inside into a value inside of a hashmap Map. Whenever it reaches the JSONObject, however, it parses it and attempts to insert into the db and I reach a
bad SQL grammar []; nested exception is org.postgresql.util.PSQLException: No hstore extension installed.
What can I do about this, and is there a better way of approaching this?
It sounds like it may be as simple as adding the hstore extension. The PostgreSQL documentation for installation looks pretty straightforward:
Let me know if I'm missing something, hope this helps!
I'm developing a web app with Node.js using Sails framework(based on Express) and i'm using a third party image solution called Transloadit (no need to know Transloadit).
Anyway, that's not the problem, i'm been able to implement the Transloadit form and receive the information from their API.
My problem is that, Transloadit gives me the response as a String, and I need to access the response objects, so i'm using var objRes = JSON.parse(req.body.transloadit); to parse it to an JSON object, and when I console.log(objRes); the object is not correctly parsed, i get this: (see all JSON here https://gist.github.com/kevinblanco/9631085 )
{
a bunch of fields here .....
last_seq: 2,
results: {
thumb: [
[
Object
]
]
}
}
And I need the data from the thumb array, my question is, Why is doing that when parsing ?
Here's the entire request req.body object: https://gist.github.com/kevinblanco/9628156 as you can see the transloadit field is a string, and I need the data from some of their fields.
Thanks in advance.
There is nothing wrong with the parsing of the JSON -- in fact there is no problem at all.
consol.log limits the depth of what it is printing which is why you are seeing [object] in the output.
If you want to see the full output in node.js then just use the inspect utility like this;
console.log(util.inspect( yourobject, {depth:null} ));
and that will print the entire content.
Note that this is just an artifact of console.log printing it.