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index.js
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index.js
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// Load sensitive variables from .env
require('dotenv').config();
const ApiBuilder = require('claudia-api-builder'),
fetch = require("node-fetch"),
spotify = require("./src/api/spotify.js"),
ecs = require("./src/api/ecs.js"),
s3 = require("./src/api/s3.js"),
cognito = require("./src/api/cognito.js"),
db = require("./src/api/db.js"),
api = new ApiBuilder();
module.exports = api;
/**
* Enables users to search for an artist, track, or album to use as a seed
*/
api.get('/search', async (req) => {
let {identityId, q, type} = req.proxyRequest.queryStringParameters;
let response = await spotify.Search(identityId, q.replace(" ", "%20"), type.toLowerCase(), 5);
console.log(`[/search?identityId=${identityId}]: ${JSON.stringify(response, null, 2)}`);
return response;
});
/**
* returns the users most recently listened to tracks
*/
api.get('/user/recent', async (req) => {
let {identityId} = req.proxyRequest.queryStringParameters;
let response = await spotify.GetRecentTracks(identityId);
console.log(`[/user/recent?identityId=${identityId}]: ${JSON.stringify(response, null, 2)}`);
return response;
});
/**
* returns the users favorite tracks and artists
*/
api.get('/user/favorites', async (req) => {
let {identityId} = req.proxyRequest.queryStringParameters;
let topTracks = await spotify.GetTop(identityId, "tracks", "medium_term");
let topArtists = await spotify.GetTop(identityId, "artists", "medium_term");
let response = {
topTracks,
topArtists
};
console.log(`[/user/favorites?identityId=${identityId}]: ${JSON.stringify(response, null, 2)}`);
return response;
});
/**
* returns the active getunes playlists made for the user
*/
api.get('/user/playlists/getunes', async (req) => {
let {identityId} = req.proxyRequest.queryStringParameters;
let playlists = await spotify.GetPlaylists(identityId);
console.log("playlists: " + playlists.length);
let data = await s3.GetData(identityId, "playlists.json");
console.log("data: " + JSON.stringify(data, null, 2));
let response = [];
if (data) {
let arr = JSON.parse(data);
response = playlists.filter(p => arr.filter(d => d === p.id)[0]);
}
for (let i = 0; i < response.length; i++) {
response[i].tracks = await spotify.GetPlaylistTracks(response[i].id, undefined, identityId);
}
console.log(`[/user/playlists/getunes?identityId=${identityId}]: ${JSON.stringify(response, null, 2)}`);
return response;
});
/**
* returns an access token for Spotify. Used to initialize the player on the website
*/
api.get('/access-token', async (req) => {
let {identityId} = req.proxyRequest.queryStringParameters;
return await spotify.RefreshToken(identityId);
});
/**
* Creates a playlist based on the seed, method, and number of songs
* and saves the playlist id and tracks to S3
* returns the track uris of the playlist
*/
api.post('/playlist', async (req) => {
let {method, seed, num, identityId} = req.body;
console.log("Seed: " + JSON.stringify(seed, null, 2));
let tracks = [];
// Get library
// TODO: What if somehow we failed to get their library before?
let songs = JSON.parse((await s3.GetData(identityId, "library/tracks.json")) || "[]");
let playlistTracks = JSON.parse((await s3.GetData(identityId, "library/playlist-tracks.json")) || "[]");
let recommendedTracks = JSON.parse((await s3.GetData(identityId, "recommended/playlist-tracks.json")) || "[]");
let library = songs.concat(playlistTracks).concat(recommendedTracks);
console.log(`[${library.length} tracks read from library]`);
switch (method) {
case "related":
tracks = await spotify.GetRelatedSongs(identityId, seed, library, num);
break;
case "other":
tracks = await spotify.GetOtherSongs(identityId, seed, library);
break;
case "spotify":
tracks = await spotify.GetRecommendedSongs(identityId, seed, library);
break;
}
console.log(`[/user/playlists?identityId=${identityId}]: ${tracks.length} tracks found to recommend`);
let playlist = await spotify.CreatePlaylist(identityId, `Getunes: ${seed.artistName}`);
tracks = tracks.filter(t => t).slice(0, num);
await spotify.AddSongsToPlaylist(identityId, playlist.id, tracks.map(t => t.uri));
if (playlist && playlist.id) {
await s3.AddOrCreateData(identityId, "playlists.json", playlist.id);
await s3.AddOrCreateData(identityId, "recommended/playlist-tracks.json", tracks);
}
console.log(`[/user/playlists?identityId=${identityId}]: Returning ${tracks.length} tracks.`);
playlist.tracks = tracks;
return playlist;
});
/**
* Used to authorize a user that logs in via Spotify
* and adds the user to DynamoDB if not already existing
*/
api.post('/auth', async (req) => {
let {code} = req.body;
console.log(`Authorizing: ${code}`);
let {access_token, refresh_token} = await spotify.AuthUser(code);
let profile = await spotify.GetUserProfile(access_token);
console.log(`Got ID: ${profile && profile.id}`);
let cognitoIdentity = await cognito.GetIdentity(profile.id);
console.log(JSON.stringify(cognitoIdentity, null, 2));
if (cognitoIdentity && cognitoIdentity.IdentityId) {
let user = await db.GetUser(cognitoIdentity.IdentityId);
// If the user doesn't exist yet, create him
if (!user) {
await db.AddUser({identityId: cognitoIdentity.IdentityId, refresh_token, spotifyId: profile.id});
let res = await ecs.GetLibrary(cognitoIdentity.IdentityId);
console.log(`[/auth?identityId=${cognitoIdentity.IdentityId}]: ECS Task ${JSON.stringify(res, null, 2)}`);
}
}
return {profile, cognitoIdentity};
});
/**
* returns a list of booleans indicating if a track was saved
*/
api.post('/track/is-saved', async (req) => {
let {identityId, ids} = req.body;
return await spotify.IsTrackSaved(identityId, ids);
});
/**
* Saves a track id to the users spotify library
*/
api.post('/track/save', async (req) => {
let {identityId, ids} = req.body;
return await spotify.SaveTrack(identityId, ids);
});
/**
* Removes a track id from the users spotify library
*/
api.post('/track/remove', async (req) => {
let {identityId, ids} = req.body;
return await spotify.RemoveTrack(identityId, ids);
});