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//#region REQUIRE
const axios = require('axios');
const fs = require('node:fs');
const path = require('path');
//#endregion
//#region VARIABLES
const commonDir = path.join(__dirname, '../common');
const spotifyRequestsLimit = 50;
const thresholdLove = 0.6;
var albums = {};
var albumDataStructure = {
savedTracks: [],
totalTracks: 0,
name: "",
artistsNames: []
};
var accessToken;
try { accessToken = fs.readFileSync(commonDir + '/spotify_access_token', 'utf8') }
catch (err) { console.error(err) }
//#endregion
//#region GET SAVED TRACKS
async function getOffsetSavedTracks(href=`https://api.spotify.com/v1/me/tracks?offset=0&limit=${spotifyRequestsLimit}`) {
try {
const response = await axios.get(href, { headers: { 'Authorization': 'Bearer ' + accessToken, } });
response.data.items.forEach(t => {
if(t.track.album.album_type !== "single") {
if(!albums[t.track.album.id]) {
var albumData = Object.create(albumDataStructure);
albumData.savedTracks = [];
albumData.totalTracks = t.track.album.total_tracks;
albums[t.track.album.id] = albumData;
albumData.name = t.track.album.name;
albumData.artistsNames = [];
t.track.album.artists.forEach(artist => albumData.artistsNames.push(artist.name));
}
albums[t.track.album.id].savedTracks.push(t.track.id);
}
});
if(response.data.next) await getOffsetSavedTracks(response.data.next);
} catch (error) { webError("Get saved tracks", error) }
}
async function getSavedTracks() {
await getOffsetSavedTracks();
}
//#endregion
//#region TRESHOLD ALGORITHM
async function checkAlbum(idsString,idsList) {
try {
const response = await axios.get(`https://api.spotify.com/v1/me/albums/contains?ids=${idsString}`, { headers: { 'Authorization': 'Bearer ' + accessToken, } });
var idsToSaveString = "";
for(var i in response.data) {
if(!response.data[i]) {
idsToSaveString = idsToSaveString.concat(idsList[i],',');
var artistsNames = "";
albums[idsList[i]].artistsNames.forEach(name => artistsNames = artistsNames.concat(name,' & '));
artistsNames = artistsNames.substring(0, artistsNames.length - 3);
console.log(`New saved album: ${albums[idsList[i]].name} from ${artistsNames}`);
}
}
await axios.put(`https://api.spotify.com/v1/me/albums?ids=${idsToSaveString}`, { x: 'x' } , { headers: { 'Authorization': 'Bearer ' + accessToken, } });
} catch (error) { webError("Check album", error) }
}
async function tresholdAlgorithm() {
var lovedAlbum = []
for(let album in albums) {
if(albums[album].savedTracks.length >= albums[album].totalTracks * thresholdLove) {
lovedAlbum.push(album);
}
}
var idsString = "";
var idsList = [];
var tmp = 0;
for(var album of lovedAlbum ) {
idsList.push(album);
idsString = idsString.concat(album,',');
tmp = tmp+1;
if(tmp == 20){
await checkAlbum(idsString,idsList);
idsString = "";
idsList = [];
tmp = 0;
}
}
await checkAlbum(idsString,idsList);
}
//#endregion
//#region LOGS
function webError(step, error) {
console.log(`[KO] ${step} : ${error}`);
throw new Error();
}
function stepSuccess(step) {
console.log(`[OK] ${step}`);
}
function stepBeggining(step) {
const sptor = "=".repeat(5);
console.log(`\n${sptor} ${step} ${sptor}`);
}
async function stepExecution(stepName, stepFunc) {
stepBeggining(stepName);
await stepFunc()
stepSuccess(stepName);
}
//#endregion
//#region MAIN
async function main() {
const step1 = "Get liked tracks";
const step2 = "Apply treshold algorithm";
try {
await stepExecution(step1, getSavedTracks);
await stepExecution(step2, tresholdAlgorithm);
} catch (error) { }
}
//#endregion
//#region EXPORTS
module.exports = {
main,
// For tests
}
//#endregion