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#![feature(proc_macro_hygiene, decl_macro)]
#[macro_use]
extern crate rocket;
#[macro_use]
extern crate lazy_static;
mod serve;
use postgres::{Client, NoTls};
use std::sync::{Arc, Mutex};
lazy_static! {
static ref CLIENT: Arc<Mutex<Client>> = Arc::new(Mutex::new(
Client::connect("host=track_db user=postgres password=example", NoTls).unwrap()
));
}
fn main() {
//initialize_db().unwrap();
println!("connected with db");
rocket::ignite()
.mount(
"/",
routes![
serve::token,
serve::get_tracks,
serve::match_users,
serve::get_users
],
)
.launch();
}
fn initialize_db() -> Result<(), postgres::Error> {
let mut client = CLIENT.lock().unwrap();
//let _ = client.batch_execute("DROP TABLE user_track; DROP TABLE suser; DROP TABLE track;");
client.batch_execute(
r#"
CREATE TABLE track IF NOT EXISTS (
track_id SERIAL PRIMARY KEY,
track_code TEXT NOT NULL UNIQUE,
name TEXT NOT NULL,
artist TEXT NOT NULL,
popularity int DEFAULT 50
);
CREATE TABLE suser IF NOT EXISTS (
user_id SERIAL PRIMARY KEY,
user_name TEXT NOT NULL UNIQUE
);
CREATE TABLE user_track_raw IF NOT EXISTS (
track_id int REFERENCES track (track_id) ON UPDATE CASCADE ON DELETE CASCADE,
user_id int REFERENCES suser (user_id) ON UPDATE CASCADE ON DELETE CASCADE,
count int NOT NULL DEFAULT 1,
CONSTRAINT track_user_pkey PRIMARY KEY (track_id, user_id)
);
CREATE OR REPLACE VIEW user_track AS (
SELECT *, "count" / (
SELECT SUM("count")
FROM user_track ut
WHERE ut.user_id = user_id
)::decimal AS score
FROM user_track
);
"#,
)?;
Ok(())
}
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