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use chrono::Utc;
use diesel::PgConnection;
use serde::Deserialize;
use serde::Serialize;
use std::sync::Arc;
use std::sync::Mutex;
use std::sync::RwLock;
use std::thread;
use std::time::Duration;
use std::time::Instant;
use threadpool::ThreadPool;
use crate::db;
use crate::error::Error;
use crate::models;
use crate::strava;
pub const WORKERS: usize = 10;
pub const EMPTY_PARAMS: &[(&str, &str)] = &[];
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum Command {
ImportStravaUser { username: String },
}
pub struct ImporterSharedData<StravaApi: strava::StravaApi + 'static> {
strava: RwLock<StravaApi>,
pool: Mutex<ThreadPool>,
conn: Mutex<PgConnection>,
running: Mutex<bool>,
}
pub struct Importer<StravaApi: strava::StravaApi + 'static> {
shared: Arc<ImporterSharedData<StravaApi>>,
}
fn run_periodically<S: strava::StravaApi>(shared: Arc<ImporterSharedData<S>>, period: Duration) {
let sleep_time = Duration::from_millis(1000);
let mut now = Instant::now();
loop {
while now.elapsed() < period {
if !*shared.running.lock().unwrap() {
return;
}
thread::sleep(sleep_time);
}
now = Instant::now();
info!("run_periodically: wakeup");
handle_tasks(shared.clone())
}
}
fn handle_one_task<S: strava::StravaApi>(
shared: Arc<ImporterSharedData<S>>,
) -> Result<models::Task, Error> {
let task = {
let conn = shared.conn.lock().unwrap();
let now = Utc::now();
let eta = now + chrono::Duration::seconds(5);
db::take_task(&conn, models::TaskState::NEW, now, eta)?
};
let command = serde_json::from_value(task.payload.clone())?;
match command {
Command::ImportStravaUser { username } => import_strava_user(shared, username.as_str())?,
}
Ok(task)
}
fn handle_tasks<S: strava::StravaApi>(shared: Arc<ImporterSharedData<S>>) {
let mut done = false;
while !done {
match handle_one_task(shared.clone()) {
Err(Error::NotFound) => {
info!("No more tasks");
done = true;
}
Err(e) => {
error!("Error handling task: {}", e);
}
Ok(t) => {
info!("Successfully handled task: {:?}", t);
}
};
}
}
impl<StravaApi: strava::StravaApi> Importer<StravaApi> {
pub fn new(conn: PgConnection, strava: StravaApi) -> Importer<StravaApi> {
let shared = Arc::new(ImporterSharedData {
pool: Mutex::new(ThreadPool::with_name("importer".to_string(), WORKERS)),
conn: Mutex::new(conn),
strava: RwLock::new(strava),
running: Mutex::new(false),
});
Importer { shared: shared }
}
pub fn run(&self) {
info!("run()");
let pool = self.shared.pool.lock().unwrap();
let mut running = self.shared.running.lock().unwrap();
if !*running {
*running = true;
pool.execute({
let shared = self.shared.clone();
move || run_periodically(shared, Duration::from_secs(10))
});
}
}
pub fn join(&self) {
*self.shared.running.lock().unwrap() = false;
self.shared.pool.lock().unwrap().join();
}
}
fn import_strava_user<S: strava::StravaApi>(
shared: Arc<ImporterSharedData<S>>,
username: &str,
) -> Result<(), Error> {
let strava = shared.strava.read().unwrap();
let user = db::get_user(&shared.conn.lock().unwrap(), username)?;
let token = {
let conn = shared.conn.lock().unwrap();
get_or_refresh_token(&*strava, &conn, &user)?
};
let per_page = 30;
for page in 1.. {
let params = [
("page", &format!("{}", page)[..]),
("per_page", &format!("{}", per_page)[..]),
];
let result = strava.get("/athlete/activities", &token.access_token, ¶ms[..])?;
let json_error = || Error::UnexpectedJson(result.clone());
let result = result
.as_array()
.ok_or_else(json_error)?;
for activity in result {
let id = activity["id"].as_i64().ok_or_else(json_error)?;
info!(
"activity id: {} start: {}",
id, activity["start_date"]
);
db::insert_data(&shared.conn.lock().unwrap(),
&models::RawData {
data_type: models::DataType::StravaActivity,
id: id,
username: username.to_string(),
payload: activity.clone(),
})?;
}
if result.len() < per_page {
break;
}
thread::sleep(Duration::from_secs(1));
}
Err(Error::InternalError)
}
fn get_or_refresh_token<Strava: strava::StravaApi>(
strava: &Strava,
conn: &PgConnection,
user: &models::User,
) -> Result<models::StravaToken, Error> {
let mut token = db::get_strava_token(&conn, &user).expect("FIX");
if token.expires_at < Utc::now() {
info!("refresh expired token: {:?}", token.expires_at);
let new_token = strava.refresh_token(&From::from(&token))?;
new_token.update_model(&mut token);
}
Ok(token)
}
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