## happiness-manager
### Instructions
< 3 Your pleasure ? 💖 That of others Ɛ >
As you're smart, you asked every guest of the party to precise in their answer
the kind of drink they would enjoy and the kind of food they would die for.
Create a `happiness-manager.mjs` script that sort, who wants to drink what and
who wants to eat what and integrate that in your barbecue's shopping list!
> note that you must only consider **vips** guests, those that answerd `'yes'`
The script must:
- Take a directory as first argument (the `guest` directory)
- Take a file `.json` as second argument:
- If the file already exists, it will add the informations to it. If some elements already exist in the original file, it will be replaced by new values.
- If it doesn't, the script must handle the creation of the file.
- Handle case when no one answered yes to the invitation:
- `No one is coming.` has to appear in console.
- No file is updated/created.
- Handle cases when answers contains no "food" information, or no "drink"
information
- Handle cases when no one has chosen a category (for example: no one chose to
drink softs). This category should not appear in the final list.
You have to handle the info like this:
- Drinks:
- Beers: 1 pack / 6 vips (rounded up). Expected key: `6-packs-beers` .
- Water, wine, softs: 1 bottle / 4 vips in each category (rounded up).
Expected keys: `wine-bottles` , `water-bottles` , `soft-bottles` .
- Food:
- Veggies and vegans: 1 eggplant, 1 courgette, 3 mushrooms and 1 hummus / 3
vips in these categories put together. Expected keys: `eggplants` ,
`mushrooms` , `hummus` , `courgettes` .
- Carnivores: 1 burger per person. Expected key: `burgers` .
- Fish lovers: 1 sardine per person. Expected key: `sardines` .
- Omnivores: 1 chicken+shrimps+pepper kebab / person. Expected key: `kebabs` .
- Bonus: you'll add 1 potatoe per person (all categories put together).
Expected key: `potatoes` .
The infos have to be formated like this in the `.json` file:
```js
{
"key": 1 // according to actual number associated to the elem
}
```
### Notions
- [`for...of` ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...of )
- [`Array.prototype.map()` ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Map )
- [`Math.ceil()` ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/ceil )
- [Node file system: `stats` ](https://nodejs.org/api/fs.html#fs_fspromises_stat_path_options )
- [Node file system: `readdir` ](https://nodejs.org/api/fs.html#fs_fspromises_readdir_path_options )
- [Node file system: `readFile` ](https://nodejs.org/api/fs.html#fs_fspromises_readfile_path_options )
- [Node file system: `writeFile` ](https://nodejs.org/api/fs.html#fs_fspromises_writefile_file_data_options )
- [`JSON.parse()` ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse )
- [`JSON.stringify()` ](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify )
- [Node process: `exit` ](https://nodejs.org/api/process.html#process_process_exit_code )
