src/server/events_api.js
import cheerio from "cheerio";
import fetch from "node-fetch";
import apiKey from './apiKey.json';
export default class EventsApi {
bingmaps = "http://dev.virtualearth.net/REST/v1/Locations";
bingKey = apiKey["key"];
/**
* Bing method to get the city from the current location
* @param {object} currentLocation - Current location coordinates (latitude and longitude)
* @returns String with the city name and state abbreviation (or false if no location is provided)
*/
getCityFromCoordinates = async (currentLocation) => {
if (currentLocation && currentLocation.latitude && currentLocation.longitude) {
const locUrl = `${this.bingmaps}/${currentLocation.latitude, currentLocation.longitude}?&key=${this.bingKey}`;
const response = await fetch(locUrl);
const json = await response.json();
const dataAddress = json["resourceSets"][0]["resources"][0]["address"];
const uf = dataAddress["adminDistrict"];
const city = dataAddress["locality"];
const adminDistrict2 = dataAddress["adminDistrict2"];
const theplace = city ? city : adminDistrict2;
return `${theplace.replace(" ", "-")}-${uf}`;
} else {
return false;
}
}
/**
* Cria um json com as informações dos eventos
* @param {string} event - html da página
* @returns json com os eventos
*/
createEventsJson = (event) => {
const $ = cheerio.load(event);
const eventos = [];
$('[class*=\"CardLink\"]').each((index, element) => {
const link = $(element).attr("href").toString();
const loc = $(element).children().find("[class*=\"EventLocation\"]").text();
const title = $(element).children().find("[class*=\"EventTitle\"]").text();
const dates = $(element).children().find("[class*=\"EventDate\"] div div");
let finalDates;
const numberOfElements = dates.length;
if (numberOfElements > 1) {
const start = $(dates[0]).text();
const end = $(dates[1]).text();
finalDates = start + " - " + end;
} else {
finalDates = $(dates[0]).text();
}
eventos.push({ "Nome": title, "Local": loc, "Date": finalDates, "Link": link });
});
return eventos;
}
/**
* Faz o request e pega as informações dos eventos
* @param {string} local - Formato: cidade-sem-espaco-siglaDoEstado (ex: juiz-de-fora-mg)
* @returns json com os eventos
*/
getEventsData = async (local) => {
if(!local){
local = "juiz-de-fora-mg";
}
const url = `https://www.sympla.com.br/eventos/${local}?s=financeiro`;
try {
const response = await fetch(``, {
method: 'GET',
headers: {
"Host": "www.sympla.com.br",
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:124.0) Gecko/20100101 Firefox/124.0",
"Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8",
"Accept-Language": "pt-BR,pt;q=0.8,en-US;q=0.5,en;q=0.3",
"Accept-Encoding": "gzip, deflate, br",
"Referer": url,
"Upgrade-Insecure-Requests": "1",
"Sec-Fetch-Dest": "document",
"Sec-Fetch-Mode": "navigate",
"Sec-Fetch-Site": "same-origin",
"Sec-Fetch-User": "?1",
"Connection": "keep-alive"
}
})
const html = await response.text();
const json = this.createEventsJson(html);
return json;
} catch (error) {
console.log(error);
}
}
/**
* Makes a request to get the events details
* @param {object} eventJson - JSON representation of the events
* @returns event object with more details
*/
getEventsDetails = async (eventJson) => {
console.log(eventJson);
const response = await fetch(eventJson[index]["Link"], {
method: 'GET',
headers: {
'Accept': 'text/html'
}
});
const respTxt = await response.text();
//console.log(respTxt);
console.log(eventJson[index]["Link"]);
const $ = cheerio.load(respTxt);
let loc_details_els = $.find('body section:nth-of-type(3) #event-location + *:not(button) :not(button):not(svg):not(path)');
final = "";
loc_details_els.forEach(element => {
final += element.text() + " - ";
});
console.log(final);
console.log(loc_details_els);
// const eventsDetails = [];
// console.log(eventJson.length);
// for (let index = 0; index < eventJson.length; index++) {
// if (index == 0) {
// const response = await fetch(eventJson[index]["Link"], {
// method: 'GET',
// headers: {
// 'Accept': 'text/html'
// }
// });
// const respTxt = await response.text();
// //console.log(respTxt);
// console.log(eventJson[index]["Link"]);
// const $ = cheerio.load(respTxt);
// let loc_details_els = $('body section:nth-of-type(3) #event-location + *:not(button) :not(button):not(svg):not(path)').find();
// final = "";
// loc_details_els.forEach(element => {
// final += element.text() + " - ";
// });
// console.log(final);
// console.log(loc_details_els);
//}
//}
// eventJson.forEach(async event => {
// const response = await fetch(event["Link"]);
// console.log(await response.text());
// const $ = cheerio.load(await response.text());
// let loc_details = $('body section:nth-of-type(3) #event-location + *:not(button) :not(button):not(svg):not(path)').text();
// loc_details.replace("<h4>", "");
// loc_details.replace("</h4>", "");
// loc_details.replace("<p>", "");
// loc_details.replace("</p>", "");
// eventsDetails.push({
// ...event,
// "Local_Details": loc_details
// });
// });
return eventsDetails;
}
/**
* Get the coordinates from the event place
* @param {string} eventPlace - Place of the event that
* @returns Coordinates of the event
*/
getEventCoordinates = async (eventPlace) => {
const locUrl = `${this.bingmaps}?countryRegion=BR&adminDistrict=MG&locality=Juiz de Fora&addressLine=olegário maciel&key=${this.bingKey}`;
const response = await fetch(locUrl);
const json = await response.json();
const coordinates = json["resourceSets"][0]["resources"][0]["point"]["coordinates"];
return { latitude: coordinates[0], longitude: coordinates[1] };
}
/**
* Finds the closest events from the current location
* @param {object} data - JSON representation of all the events
* @returns List with 5 closest events
*/
findClosestEvents = (data) => {
data.forEach(evento => {
const latEvento = evento.Local.latitude;
const lonEvento = evento.Local.longitude;
const distancia = this.calculateDistance(this.initialCoord.lat, this.initialCoord.lon, latEvento, lonEvento);
evento['Distancia em km'] = distancia;
});
const closest = data.sort((a, b) => a['Distancia em km'] - b['Distancia em km']);
return closest.slice(0,5);
}
/**
* Calculates the distance between two events
* @param {number} lat1 - First event latitude
* @param {number} lon1 - First event longitude
* @param {number} lat2 - Second event latitude
* @param {number} lon2 - Second event longitude
* @returns distance between events
*/
calculateDistance(lat1, lon1, lat2, lon2) {
const raioTerra = 6371;
const lat1Rad = this.toRadians(lat1);
const lon1Rad = this.toRadians(lon1);
const lat2Rad = this.toRadians(lat2);
const lon2Rad = this.toRadians(lon2);
const dLon = lon2Rad - lon1Rad;
const dLat = lat2Rad - lat1Rad;
const a = Math.sin(dLat / 2) ** 2 + Math.cos(lat1Rad) * Math.cos(lat2Rad) * Math.sin(dLon / 2) ** 2;
const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
const distancia = raioTerra * c; //km
return distancia;
}
/**
* Convert degrees to radians
* @param {number} degrees
* @returns Number in radians
*/
toRadians(degrees) {
return degrees * (Math.PI / 180);
}
}
