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use crate::errors::Error;
use lazy_static::lazy_static;
use rocket::response::Redirect;
use rspotify::spotify::client::{ApiError, Spotify};
use rspotify::spotify::oauth2::{SpotifyClientCredentials, SpotifyOAuth};
use rspotify::spotify::util::process_token;
use std::collections::HashMap;
use std::sync::{Arc, Mutex};
lazy_static! {
static ref CACHE: Arc<Mutex<HashMap<String, SpotifyOAuth>>> =
Arc::new(Mutex::new(HashMap::new()));
}
#[get("/callback/<name>/<url>")]
pub fn get_tracks(name: String, url: String) -> Result<(), Error> {
let (uid, spotify_uid, spotify) = autenth_user(name.as_ref(), url)?;
let chunk_size = 50;
let mut playlist_index = 0;
loop {
match spotify.user_playlists(spotify_uid.as_ref(), Some(chunk_size), Some(playlist_index)) {
Ok(playlists) => {
playlist_index += chunk_size;
if playlists.items.is_empty() {
break;
}
for playlist in playlists.items {
println!("playlist: {:?}", playlist.name);
let mut track_index = 0;
loop {
match spotify.user_playlist_tracks(
spotify_uid.as_ref(),
&playlist.id,
None,
Some(chunk_size),
Some(track_index),
None,
) {
Ok(tracks) => {
track_index += chunk_size;
if tracks.items.is_empty() {
break;
}
for track in tracks.items {
if let Err(e) = insert_track(uid, track.track) {
println!("failed to load track to db: {:?}", e)
};
}
}
Err(e) => match e.downcast::<ApiError>() {
Ok(ApiError::RateLimited(x)) => std::thread::sleep(
std::time::Duration::from_secs(x.unwrap_or(5) as u64),
),
cause => {
println!("Error: {:?}", cause);
break;
}
},
}
}
}
}
Err(e) => match e.downcast::<ApiError>() {
Ok(ApiError::RateLimited(x)) => {
std::thread::sleep(std::time::Duration::from_secs(x.unwrap_or(5) as u64))
}
cause => {
println!("Error: {:?}", cause);
break;
}
},
}
}
Ok(())
}
fn autenth_user(name: &str, url: String) -> Result<(i32, String, Spotify), Error> {
let mut guard = CACHE.lock()?;
let mut oauth = guard.remove(name)?;
println!("auth: {:?} url: {}", oauth, url);
let token_info = process_token(&mut oauth, &mut ("?code=".to_owned() + url.as_ref()));
let client_credential = SpotifyClientCredentials::default()
.token_info(token_info?)
.build();
let spotify = Spotify::default()
.client_credentials_manager(client_credential)
.build();
let user_id = spotify
.current_user()
.map_err(|e| format!("failed to load currentuser {:?}", e))?
.id;
let mut client = crate::CLIENT.lock()?;
client.execute(
"INSERT INTO suser (user_name) VALUES ($1) ON CONFLICT (user_name) DO NOTHING;",
&[&user_id],
)?;
let uid = get_uid(user_id.as_ref(), &mut client)?;
//reset user_track relation
client.execute("DELETE FROM user_track WHERE user_id = $1;", &[&uid])?;
Ok((uid, user_id, spotify))
}
use rspotify::spotify::model::track::FullTrack;
fn insert_track(user_id: i32, track: FullTrack) -> Result<(), Error> {
let mut client = crate::CLIENT.lock()?;
if track.id.is_none() {
println!("{:#?}", track);
return Err("failed to load get track information".into());
}
print!(" {} ", track.id.clone()?);
client.execute(
"INSERT INTO track (track_code, name, artist, popularity)
VALUES ($1, $2, $3, $4)
ON CONFLICT DO NOTHING
",
&[
&(track.id.clone()?),
&track.name,
&track.artists[0].name,
&(track.popularity as i32),
],
)?;
let track_id: i32 = client.query(
"SELECT track_id FROM track where track_code = $1;",
&[&(track.id?)],
)?[0]
.get(0);
println!("uid: {} tid: {}", user_id, track_id);
client.execute(
"
INSERT INTO user_track_raw (track_id, user_id, count)
VALUES ($1, $2, $3)
ON CONFLICT
ON CONSTRAINT track_user_pkey
DO NOTHING;
UPDATE user_track SET count = count + 1 WHERE track_id = $1 AND user_id = $2;
",
&[&track_id, &user_id, &0],
)?;
Ok(())
}
#[get("/token/<name>")]
pub fn token(name: String) -> Result<Redirect, Error> {
let state = rspotify::spotify::util::generate_random_string(16);
let oauth = SpotifyOAuth::default();
let oauth = oauth
.scope("playlist-read-private, playlist-read-collaborative, user-read-private, user-follow-read, user-library-read")
.build();
let auth_url = oauth.get_authorize_url(Some(&state), None);
let mut guard = CACHE.lock()?;
guard.insert(name, oauth);
Ok(Redirect::to(auth_url))
}
fn get_uid(name: &str, client: &mut postgres::Client) -> Result<i32, Error> {
let x: i32 = client
.query_one("SELECT user_id FROM suser where user_name = $1;", &[&name])?
.get(0);
Ok(x)
}
#[get("/match/<name1>/<name2>")]
pub fn match_users(name1: String, name2: String) -> Result<String, Error> {
let mut client = crate::CLIENT.lock()?;
let mut songs = String::new();
for row in client.query(
"
WITH users AS (
SELECT *
FROM ( VALUES
($1), ($2)
) AS _ (user_id)
)
SELECT track_id, name, artist
FROM track
JOIN (
SELECT track_id
FROM user_track
JOIN suser USING (user_id)
JOIN track USING (track_id)
WHERE suser.user_name IN (SELECT * FROM users)
GROUP BY track_id
HAVING COUNT(track_id) = (SELECT COUNT(*) FROM users)
ORDER BY SUM(score) DESC
) AS _ USING (track_id)
;
",
&[&name1.as_str(), &name2.as_str()],
)? {
let name: String = row.get(1);
let artist: String = row.get(2);
songs = format!("{}{} by {}\n", songs, name, artist);
}
Ok(songs)
}
#[get("/user")]
pub fn get_users() -> Result<String, Error> {
let mut client = crate::CLIENT.lock()?;
let mut users = String::new();
for row in client.query("SELECT user_name FROM suser", &[])? {
let user: String = row.get(0);
users = format!("{}{}\n", users, user);
}
Ok(users)
}
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