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use crate::{LinearRetry, ProwlQueueOptions, RetryMethod};
use prowl::Notification;
use thiserror::Error;
use tokio::{
sync::mpsc::{error::SendError, unbounded_channel, UnboundedReceiver, UnboundedSender},
time::{sleep, Duration},
};
pub struct ProwlQueue {
prowl_queue_reciever: ProwlQueueReceiver,
prowl_queue_sender: ProwlQueueSender,
}
#[derive(Clone)]
pub struct ProwlQueueSender {
sender: UnboundedSender<Notification>,
}
pub struct ProwlQueueReceiver {
options: ProwlQueueOptions,
reciever: UnboundedReceiver<Notification>,
}
#[derive(Debug, Error)]
pub enum AddError {
#[error("{0}")]
SendError(SendError<Notification>),
}
impl ProwlQueue {
pub fn new(options: ProwlQueueOptions) -> Self {
let (sender, reciever) = unbounded_channel();
let prowl_queue_reciever = ProwlQueueReceiver { options, reciever };
let prowl_queue_sender = ProwlQueueSender { sender };
Self {
prowl_queue_reciever,
prowl_queue_sender,
}
}
pub fn into_parts(self) -> (ProwlQueueSender, ProwlQueueReceiver) {
(self.prowl_queue_sender, self.prowl_queue_reciever)
}
}
impl ProwlQueueSender {
pub fn add(&self, notification: Notification) -> Result<(), Box<AddError>> {
self.sender
.send(notification)
.map_err(AddError::SendError)
.map_err(Box::new)?;
Ok(())
}
}
impl ProwlQueueReceiver {
pub async fn async_loop(mut self) {
log::debug!("Notifications channel processor started.");
while let Some(notification) = self.reciever.recv().await {
let mut retry = 0;
'notification: loop {
match notification.add().await {
Ok(_) => break 'notification,
Err(prowl::AddError::Send(e)) => {
log::warn!("Will retry notification. Try {retry} failed due to {:?}", e);
}
Err(e) => {
log::error!("Terminally failed to send notification due to {:?}", e);
break 'notification;
}
}
match self.options.retry_method() {
RetryMethod::Linear(linear_retry) => {
if let Some(max) = linear_retry.max_retries() {
if retry + 1 > *max {
log::warn!("Dropping notification {:?} because it's on retry {retry} when max_retries is {}", notification, max);
break 'notification;
}
}
sleep(*linear_retry.backoff()).await;
}
}
retry += 1;
}
}
log::warn!("Notification channel has been closed.");
}
pub fn to_unbound_receiver(self) -> UnboundedReceiver<Notification> {
self.reciever
}
}
impl Default for ProwlQueue {
fn default() -> Self {
let retry_method = LinearRetry::new(Duration::from_secs(60), None);
let retry_method = RetryMethod::Linear(retry_method);
let options = ProwlQueueOptions::new(retry_method);
let (sender, reciever) = unbounded_channel();
let prowl_queue_reciever = ProwlQueueReceiver { options, reciever };
let prowl_queue_sender = ProwlQueueSender { sender };
Self {
prowl_queue_reciever,
prowl_queue_sender,
}
}
}