Hi,

Where can I configure the reduction table? What are the standard options? Can I set it up?

A hug,

Jackson

I would like the game state to be persisted when the game server stops.

Use-cases:

• manage a server crash
• split the game on 2 different days
• manage a laptop shutdown because of low battery 😆

Every game iteration, the game state is saved into a LevelDB local database. On server startup, the game state is rebuilt from the state stored in LevelDB.

I have a pull request almost ready to submit.

WDYT?

It's common that people make mistake when they register, so I get 'zombie' teams and the scores are less readable.

When I facilitated the game for a large number of teams, it was annoying. For ~20 teams I got 3 or 4 'zombie' teams created by mistake with huge negative scores in the end of the game.

It would be handy to remove these teams or hide them.

Only the facilitator should be able to do that. So I would suggest a hidden HTTP REST endpoint, or a hidden button on the web interface displayed only for localhost.

Problem

Sometimes when I run npm test on the server, I get the following failure:

 1) BadRequest should randomly corrupt order
   Message:
     Expected { prices : [ 64.73, 29.48, 73.49, 58.88, 46.61, 65.4, 16.23 ], quantities : [ 3, 10, 6, 5, 9, 5 ], country : 'FR', reduction : 'STANDARD' } not to equal { prices : [ 64.73, 29.48, 73.49, 58.88, 46.61, 65.4, 16.23 ], quantities : [ 3, 10, 6, 5, 9, 5 ], country : 'FR', reduction : 'STANDARD' }.
   Stacktrace:
     Error: Expected { prices : [ 64.73, 29.48, 73.49, 58.88, 46.61, 65.4, 16.23 ], quantities : [ 3, 10, 6, 5, 9, 5 ], country : 'FR', reduction : 'STANDARD' } not to equal { prices : [ 64.73, 29.48, 73.49, 58.88, 46.61, 65.4, 16.23 ], quantities : [ 3, 10, 6, 5, 9, 5 ], country : 'FR', reduction : 'STANDARD' }.

Most often the test passes. But sometimes it fails randomly.

How to reproduce the problem

Run the following script to be pretty sure to see the problem:

#!/usr/bin/env bash
set -e
for i in $(seq 1 100); do
	npm test
done

Tested on:

• macOS 10.12.4
• node v7.9.0

Analysis

The test expects the random-generated order corruption to be different than the previous corrupted order. There is a non-null probability that the random order generator builds an identical corrupted order.

Suggestion

Maybe we could set the random generator seed, or mock the random. Which one do you prefer?
I'll try to make a PR.

Today, new sellers (participants) are able to register themselves at any point of the game. Sometimes this is not desirable, because a seller with an important negative balance can simply create a new account and start from 0.

This story is about making the registration configurable, so that the facilitator can turn it off once all teams are registered and ready to play.

Works fine in Chrome, but empty screen in Safari.

Today, if a participant do not respond the server nothing happen. It'd be great if a responde became mandatory in order to not be charged with penalties. To do so, if the participant is not able to handle the request, he has to respond 404.

In order to motivate seller to connect him to the server a countdown could be implement before the first request.
If a seller register him to the server before the end he will be credit of 15000 euros for example.

In order to encourage participants to test, it'd be great that the server starts sending bad requests. In order to not be charged with penalties, the participant should respond with the http code 400 to server. It'd be great if this feature could be activated on the fly with some frequency, like, for each 10 requests one request is wrong.

All the clients should:

• have a /ping resource that responds "pong"
• hava a /feedback resource which accepts a message {"type": "ERROR","content": "The field \"total\" in the response is missing."} and parse the same message leaving an JSON parsing example for participants
• remove all the existing parsing regarding the main problem (no more parsing for order objects and responses like Bill or other) (running the exercice with participants with a little bit of experience makes the exercice "too simple" and very short in time)
• have a test to give participants an example

Hi diego, I would like to add python client server, can you add me as a contributor ?

Today the problem is very static and sometimes people tend to implement it "from one shot". Furthermore, this approach and the /feedback resources don't push participants to test.

After many feedbacks and discussions with others running Extreme Carpaccio, we're willing to add new taxes rules on the fly to push the problem nature from static (at the beginning) to dynamic (during the game).

To do so, at some point we'd like to change the taxes strategy leaving the fixed numbers back and start using rules for each country, like : if(total < 100) return sum * 1.2; else return sum * 1.2 + 10;

In some extremely rare cases when the machine running the server automatically changes the Wi-Fi connection, the server crashes with the following error:

0 info it worked if it ends with ok
1 verbose cli [ '/usr/local/Cellar/node/7.10.0/bin/node',
1 verbose cli   '/usr/local/bin/npm',
1 verbose cli   'start' ]
2 info using [email protected]
3 info using [email protected]
4 verbose run-script [ 'prestart', 'start', 'poststart' ]
5 info lifecycle [email protected]~prestart: [email protected]
6 silly lifecycle [email protected]~prestart: no script for prestart, continuing
7 info lifecycle [email protected]~start: [email protected]
8 verbose lifecycle [email protected]~start: unsafe-perm in lifecycle true
9 verbose lifecycle [email protected]~start: PATH: /usr/local/lib/node_modules/npm/bin/node-gyp-bin:/Users/diego/Projects/github.com/dlresende/extreme-carpaccio/server/node_modules/.bin:/Users/diego/go/bin:/Users/diego/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/diego/go/bin:/Users/diego/bin:/Users/diego/.fzf/bin
10 verbose lifecycle [email protected]~start: CWD: /Users/diego/Projects/github.com/dlresende/extreme-carpaccio/server
11 silly lifecycle [email protected]~start: Args: [ '-c', 'node bin/www' ]
12 silly lifecycle [email protected]~start: Returned: code: 1  signal: null
13 info lifecycle [email protected]~start: Failed to exec start script
14 verbose stack Error: [email protected] start: `node bin/www`
14 verbose stack Exit status 1
14 verbose stack     at EventEmitter.<anonymous> (/usr/local/lib/node_modules/npm/lib/utils/lifecycle.js:279:16)
14 verbose stack     at emitTwo (events.js:106:13)
14 verbose stack     at EventEmitter.emit (events.js:194:7)
14 verbose stack     at ChildProcess.<anonymous> (/usr/local/lib/node_modules/npm/lib/utils/spawn.js:40:14)
14 verbose stack     at emitTwo (events.js:106:13)
14 verbose stack     at ChildProcess.emit (events.js:194:7)
14 verbose stack     at maybeClose (internal/child_process.js:899:16)
14 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:226:5)
15 verbose pkgid [email protected]
16 verbose cwd /Users/diego/Projects/github.com/dlresende/extreme-carpaccio/server
17 error Darwin 16.4.0
18 error argv "/usr/local/Cellar/node/7.10.0/bin/node" "/usr/local/bin/npm" "start"
19 error node v7.10.0
20 error npm  v4.2.0
21 error code ELIFECYCLE
22 error errno 1
23 error [email protected] start: `node bin/www`
23 error Exit status 1
24 error Failed at the [email protected] start script 'node bin/www'.
24 error Make sure you have the latest version of node.js and npm installed.
24 error If you do, this is most likely a problem with the extreme-carpaccio-server package,
24 error not with npm itself.
24 error Tell the author that this fails on your system:
24 error     node bin/www
24 error You can get information on how to open an issue for this project with:
24 error     npm bugs extreme-carpaccio-server
24 error Or if that isn't available, you can get their info via:
24 error     npm owner ls extreme-carpaccio-server
24 error There is likely additional logging output above.
25 verbose exit [ 1, true ]

Server does not start when running npm run start (npm version: 6.4.1). Error:

internal/validators.js:113
    throw err;
    ^

TypeError [ERR_INVALID_ARG_TYPE]: The "interval" argument must be of type number. Received type object
    at StatWatcher.start (internal/fs/watchers.js:76:3)
    at Object.watchFile (fs.js:1322:10)
    at Configuration.watch (/home/CODE/extreme-carpaccio/server/javascripts/config.js:65:16)
    at Object.<anonymous> (/home/CODE/extreme-carpaccio/server/app.js:26:15)
    at Module._compile (internal/modules/cjs/loader.js:723:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:734:10)
    at Module.load (internal/modules/cjs/loader.js:620:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:560:12)
    at Function.Module._load (internal/modules/cjs/loader.js:552:3)
    at Module.require (internal/modules/cjs/loader.js:659:17)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] start: `node bin/www`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the [email protected] start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

It is caused by configuration.watch(); line in app.js not passing any parameters. Due to that callback, watchOnce, interval are undefined and the error this thrown.

I've checked if this worked on earlier versions of npm and found out that it works in version 2.15.11 despite those parameters being undefined.

I'll create a merge request resolving this issue, but the way I do it might not be the best.

Edit:
I verified it on another machine as well - the same thing happens

Chalk bump break imports

Hello guys, I tried to run the server but got this error :

> [email protected] start
> node bin/www

/private/tmp/extreme-carpaccio/server/javascripts/repositories.js:4
var chalk = require('chalk')
            ^

Error [ERR_REQUIRE_ESM]: require() of ES Module /private/tmp/extreme-carpaccio/server/node_modules/chalk/source/index.js from /private/tmp/extreme-carpaccio/server/javascripts/repositories.js not supported.
Instead change the require of index.js in /private/tmp/extreme-carpaccio/server/javascripts/repositories.js to a dynamic import() which is available in all CommonJS modules.
    at Object.<anonymous> (/private/tmp/extreme-carpaccio/server/javascripts/repositories.js:4:13) {
  code: 'ERR_REQUIRE_ESM'
}

Node.js v21.7.1

I tried with the following conditions :

• OS: MacOS Sonoma 14.1
• Node: v21.7.1

It seems that the culprit is the bump of Chalk 4.1.2 -> Chalk 5.3.0, when I checkout on commit 5859d8f80586cdde32f294e9cdf14ae9266a8470, it works.

Have a nice day. :)

It would be nice to be able to detect when then server closes and then store current sellers with their scores in a file

As is, when the url is not well formed (like http://localhost:port/path) the server clashes.

Hi,

In some context, 'value generation' is not a big enough incentive for teams to change their behaviors! For example:

• teams are stuck in a long batch delivery mode, they don't see the value of delivering early because nothing will hit a customer before one year anyway
• dev teams are mostly 'executors' and they don't really care if their employer gets more value or not, for them, life is still going to look like "Stories in, stories out..."

These work environments are far from ideal, but unfortunately, they are still very common. In order to try something new, I thought we could tweak the extreme carpaccio to estimate the stress level of the different seller teams. This way we would see that the way they work has a direct impact on their working conditions. I thought about estimating stress by summing 3 factors:

• Something proportional to the income difference with leaders (when you are not performing well on the market, you get pressure)
• Something proportional to the time since last 'earning' (when you don't deliver anything new for a long time, you get pressure)
• Something proportional to any money lost, that would then decreases with time (bugs in production generate a lot of pressure)

I would need to add a new graph for stress levels on the main screen. At the end of the sessions, seller teams could compare and discuss their stress graph and the way they worked.

Here are my questions:

1. Would you be willing to accept such an enhancement in the main codebase?
2. Are there any points you would want me to keep in mind?
3. Would you prefer a large PR or many small ones? I will use small commits anyway.
4. Have you got any coding or design recommendations?

Thanks a lot for this project.

Today participants can potentially change server parameters through rest calls. We'd like to move server's configuration to a json file so that only facilitators can change server behavior.

I use jasmine-node specs/ to launch tests

As is: 890890.08
To be: 890 890.08

I'm trying to start extreme-carpaccio server in Windows 11.

C:\Users\nicolas-delsaux\Documents\open-source\extreme-carpaccio\server>npm install

> [email protected] postinstall
> node_modules/.bin/bower install

'node_modules' n’est pas reconnu en tant que commande interne
ou externe, un programme exécutable ou un fichier de commandes.
npm ERR! code 1
npm ERR! path C:\Users\nicolas-delsaux\Documents\open-source\extreme-carpaccio\server
npm ERR! command failed
npm ERR! command C:\WINDOWS\system32\cmd.exe /d /s /c node_modules/.bin/bower install

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\nicolas-delsaux\AppData\Local\npm-cache\_logs\2022-01-06T13_12_18_644Z-debug.log

NOTICE in the command trying to be run, the path has forward slashes, which are not compatible with Windows path ... I guess it's a bower bug