🚀 RunJS 1.3.2

[JonL]

@karh

One more thing, the regex is removing all white spaces - these ones should remain intact:

Use replace(/\s*,\s*/g, ",")

[NewMedia]

I’m posting my appreciation so that new people might come across this extension of yours in case they missed an earlier forum post.

Thank you, @JonL & @Apple

[jrvidotti]

Dumb question: how can I install the extension? There are docs?

Edit: found it...

Wappler Extensibility - Writing Custom Modules and Formatters for Server Connect

Wappler opens up its extensibility powers! Now you can define your own custom modules and formatters for Server Connect. You can write your own custom code but also provide a UI definition of your extensions so they integrate directly visually in Wappler! Writing Extensions for Server Connect Folder Structure All extensions files are placed in your project folder under the following folders: for modules: extensions/server_connect/modules for formatters extensions/server_connect/forma…

[sid]

Finally used this in a project. Must say its a great time-saver. Something that Wappler could include in its arsenal permanently.

@JonL One question I have is how does using VM package affect the performance? I assume its being used for securely running the scripts, but is it costly?

[JonL]

Glad you found it useful.

VM does introduce some delay as it creates a new context but I run it within an IIFE to improve that.

If you want to check the overhead use some console timers in your code and make sure you forward the console output so it shows in the server log.

[JonL]

Update 1.3.0

Added

• Added an option to run your code asynchronously
• Added an option to require modules from your code

Warning

When you require a module it won’t run sandboxed as it runs in its parent’s context.
Do not run unsafe code.

Acknowledgement

Thanks to @sid for this contribution.

Update 1.3.1

Fixed

• Fixed Async wrapper for the main function

Release 1.3.1 · JonL1/Wappler-Extension-SC-RunJS

[htatd]

Hi! Thank you very much for this extension, I’m using it in several server api’s.

I have a small issue and I can’t figure out what exactly the cause is.
I’m using a server connect api to calculate results with code in RunJS, I’m requesting the results by sending data to perform the calculations on trough the API Action component in App Connect.

The issue is that 50% of the time RunJS returns no results. I checked the request of all empty results, and they all had the necessary data sent and there were no errors.

What could be happening in the cases where there is no result? Something related to RunJS, my code, the network or server connect?

let multipleWins = false;

let sectorArr = participants;
let prizes = prizesArr;
let winners = [];

function getWinnerChances() {
  let totalChances = 0;
  for (let w = 0; w < winners.length; w++) {
    totalChances = totalChances + winners[w].chance;
  }
  return totalChances;
}

function startGame() {
  for (let prize = 0; prize < prizes.length; prize += 1) {
    let winningSector = randomSector();

      prizes[prize].winner = sectorArr[winningSector - 1].id;
      winners.push({
        winner: sectorArr[winningSector - 1].id,
        prize: prizes[prize].id,
        chance: sectorArr[winningSector - 1].chance,
        coins: prizes[prize].coins,
      });

      if (multipleWins == false) {
        sectorArr[winningSector - 1].chance = 0;
        sectorArr[winningSector - 1].radians = 0;
      }
  }
}

function randomSector() {
  let chancesArr = sectorArr;
  if (multipleWins == false) {
    for (i = 0; i < chancesArr.length; i++) {
      if (chancesArr[i].chance > 0) {
        chancesArr[i].chance =
          chancesArr[i].chance +
          getWinnerChances() / (sectorArr.length - winners.length);
      }
    }
  }

  const cumulativeSum = (
    (sum) => (value) =>
      (sum += value)
  )(0);

  let newList = chancesArr.map((currElement, index) => {
    let max = sectorArr[index].chance;
    currElement = max;
    return currElement;
  });
  let cumulativeList = newList.map(cumulativeSum);

  let listMinMax = cumulativeList.map((currElement, index) => {
    let max = currElement;
    let min = 0;
    if (index == 0) {
      min = 0;
    } else {
      min = cumulativeList[index - 1];
    }
    currElement = { min, max };
    return currElement;
  });

  let cSector = Math.random();

  let chosenSector;

  for (let i = 0; i < listMinMax.length; i++) {
    if (listMinMax[i].min < cSector && listMinMax[i].max > cSector) {
      chosenSector = i + 1;
      break;
    } else {
      continue;
    }
  }

  return chosenSector;
}

startGame();

return winners;

[JonL]

Hard to know.

Have you marked the “Show error” option and checked SC logs?

[htatd]

Ohh sorry, I was checking the browser console and not the SC logs…

Failed to execute script. TypeError: Cannot read properties of undefined (reading 'id')
    at startGame (RunJS:20:59)
    at RunJS:87:1
    at RunJS:89:20
    at Script.runInContext (node:vm:141:12)
    at App.exports.run (/opt/node_app/extensions/server_connect/modules/runjs.js:12:29)
    at App._exec (/opt/node_app/lib/core/app.js:491:57)
    at App._exec (/opt/node_app/lib/core/app.js:458:28)
    at async App.exec (/opt/node_app/lib/core/app.js:427:9)
    at async App.define (/opt/node_app/lib/core/app.js:417:9)

Getting this. So I guess problem with the code
Strange that it works half of the time though

[JonL]

BTW I am glad you are finding it useful. Sometimes I would love to know how many people use it

[htatd]

I’m using it in like 7 server connect api’s, really useful. I’m very new to Javascript so making modules would be much more complicated for me, this makes it easy for beginners to do stuff

[JonL]

For all of you that are using this extension you might want to vote for this Feature Request:

Code control for the UI

Hi @george, This is a very specific request that doesn’t add much value to the core, but it does to custom extensions. A UI control for code that includes linting(optional) and a beautifier would be cool similar to what you have for json. Specially for something like: I also realized that there is also a need to build a custom extension that can run python code and make it talk to SC. Such extension would also take advantage of having such control. I believe it’s one of the big requests fr…

The actual multiline field is less than ideal for coding

[Apple]

Problematic function might be random sector

Error occurs in start Game in this line:
prizes[prize].winner = sectorArr[winningSector - 1].id;

Specifically after the equal sign

[htatd]

Hi! Like half of the data wasn’t formatted correctly so whenever the random pick was in the incorrect half of the data it was throwing the error. That’s why it was working half of the time😅 Now with correct data all works. Thanks for taking the time to look trough it

[krish]

@JonL

Added an option to require modules from your code

Dose this give us the ability to use npm packages ?

Please please say yes Lol.

[JonL]

Yes you can.

You can also use node packages with custom extensions.

[Apple]

Could you add an option to actually throw an error? Right now, if there’s a script error, steps proceed anyway, which is undesirable in case of an error

[JonL]

Release 1.3.2 · JonL1/Wappler-Extension-SC-RunJS

Thanks to @sid for the contribution.

[HeikoK]

Heya… I think I did something wrong with the installion:

Installed the both files in /extensions/server_connect/modules/:

…then added the RunJS action and added some “code” (btw. I just realized that there’s no “Data” table for the params?)

However, on save, the “code” field gets emptied and a error message appears that the code field is mandatory:

I am pretty sure, I missed one fundamental step somewhere?

/heiko

[JonL]

Eveything seems ok on my end with the extension(using latest 1.3.2)

Try restarting the app.