/
index.js
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index.js
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/*
* (c) William Belle, 2019-2021.
* See the LICENSE file for more details.
*/
const querystring = require('querystring');
const moment = require('moment');
const got = require('got');
const MENUS_URL = 'https://menus.epfl.ch/cgi-bin/ws-getMenus';
const RESTOS_URL = 'https://menus.epfl.ch/cgi-bin/ws-getRestos';
const DEFAULT_MENUS_OPTIONS = {
language: 'en',
partOfDay: 'midi'
};
const TAGS = {
Volaille: 'Chicken',
Chinois: 'Chinese',
Poisson: 'Fish',
'Fourchette Verte': 'Green Fork',
Indien: 'Indian',
Japonais: 'Japanese',
Libanais: 'Lebanese',
Viande: 'Meat',
Pâtes: 'Pasta',
Pizza: 'Pizza',
Thaï: 'Thai',
Végétalien: 'Vegan',
Végétarien: 'Vegetarian'
};
// Accentuated tags aren't working
const BUGGY_TAGS = {
Pâtes: 'tes',
Thaï: 'Tha',
Végétalien: 'talien',
Végétarien: 'tarien'
};
const buildMenuUrl = (opts) => {
const queryParameters = {
midisoir: opts.partOfDay,
resto_id: opts.restoId,
lang: opts.language,
date: opts.date,
tags: opts.tags
};
return MENUS_URL + '?' + querystring.stringify(queryParameters);
};
const buildRestoUrl = (id) => {
const queryParameters = {
resto_id: id
};
return RESTOS_URL + '?' + querystring.stringify(queryParameters);
};
const escapeTab = (jsonString) => {
return jsonString.replace(/\t/g, '\\t');
};
const splitTags = (strTags) => {
const listTags = strTags.split(',');
return listTags.map(tag => tag.trim());
};
const findTag = (str) => {
for (const key of Object.keys(TAGS)) {
if (str.toLowerCase() === key.toLowerCase() ||
str.toLowerCase() === TAGS[key].toLowerCase()) {
return key;
}
}
return null;
};
const fixBuggyTags = (str) => {
if (str in BUGGY_TAGS) {
str = BUGGY_TAGS[str];
}
return str;
};
const buildValidTags = (listTags) => {
const validTags = [];
for (let i = 0; i < listTags.length; i++) {
const key = findTag(listTags[i]);
if (key) {
validTags.push(fixBuggyTags(key));
} else {
return null;
}
}
return validTags;
};
const findMenu = (opts = DEFAULT_MENUS_OPTIONS) => {
opts.language = opts.language || DEFAULT_MENUS_OPTIONS.language;
opts.partOfDay = opts.partOfDay || DEFAULT_MENUS_OPTIONS.partOfDay;
if (opts.language !== 'en' && opts.language !== 'fr') {
return Promise.reject(new TypeError('Language not supported'));
}
if (opts.partOfDay !== 'midi' && opts.partOfDay !== 'soir') {
return Promise.reject(new TypeError('Part of the day not supported'));
}
if (opts.date && !moment(opts.date, 'DD/MM/YYYY', true).isValid()) {
return Promise.reject(new TypeError('Not a valid date'));
}
if (opts.tags) {
let listTags = splitTags(opts.tags);
listTags = buildValidTags(listTags);
if (!listTags) {
return Promise.reject(new TypeError('Not a valid tags'));
}
opts.tags = listTags.join(',');
}
return getMenu(opts);
};
const getMenu = async function (opts) {
if (opts.restoId && isNaN(opts.restoId)) {
return Promise.reject(new TypeError('Not a valid restoId'));
}
const resto = await findResto(opts.restoId);
if (resto.length > 0) {
const url = buildMenuUrl(opts);
return promGetMenu(url);
}
return Promise.reject(new TypeError('Not a valid restoId'));
};
const promGetMenu = (url) => {
return new Promise((resolve, reject) => {
got(url).then((response) => {
const jsonString = escapeTab(response.body);
const data = JSON.parse(jsonString);
resolve(data.menus);
}).catch((err) => reject(err));
});
};
const findResto = (id) => {
const url = buildRestoUrl(id);
return new Promise((resolve, reject) => {
got(url).then((response) => {
const data = JSON.parse(response.body);
resolve(data.restos);
}).catch((err) => reject(err));
});
};
const translateTags = (strTags) => {
if (!strTags) {
throw new TypeError('Not a valid tags');
}
const listTags = splitTags(strTags);
const translatedList = [];
for (let i = 0; i < listTags.length; i++) {
if (TAGS[listTags[i]]) {
translatedList.push(TAGS[listTags[i]]);
} else {
translatedList.push(listTags[i]);
}
}
return translatedList.join(',');
};
exports.findMenu = findMenu;
exports.findResto = findResto;
exports.translateTags = translateTags;