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use std::sync::Arc;
use std::vec;
use async_trait::async_trait;
use crossterm::style::{ContentStyle, Stylize};
use log::{Level, Log};
use parking_lot::Mutex;
use time::OffsetDateTime;
use tokio::sync::mpsc;
use toss::styled::Styled;
use crate::store::{Msg, MsgStore, Path, Tree};
use crate::ui::ChatMsg;
#[derive(Debug, Clone)]
pub struct LogMsg {
id: usize,
time: OffsetDateTime,
level: Level,
content: String,
}
impl Msg for LogMsg {
type Id = usize;
fn id(&self) -> Self::Id {
self.id
}
fn parent(&self) -> Option<Self::Id> {
None
}
fn seen(&self) -> bool {
true
}
fn last_possible_id() -> Self::Id {
Self::Id::MAX
}
}
impl ChatMsg for LogMsg {
fn time(&self) -> OffsetDateTime {
self.time
}
fn styled(&self) -> (Styled, Styled) {
let nick_style = match self.level {
Level::Error => ContentStyle::default().bold().red(),
Level::Warn => ContentStyle::default().bold().yellow(),
Level::Info => ContentStyle::default().bold().green(),
Level::Debug => ContentStyle::default().bold().blue(),
Level::Trace => ContentStyle::default().bold().magenta(),
};
let nick = Styled::new(format!("{}", self.level), nick_style);
let content = Styled::new_plain(&self.content);
(nick, content)
}
fn edit(_nick: &str, _content: &str) -> (Styled, Styled) {
panic!("log is not editable")
}
fn pseudo(_nick: &str, _content: &str) -> (Styled, Styled) {
panic!("log is not editable")
}
}
/// Prints all error messages when dropped.
pub struct LoggerGuard {
messages: Arc<Mutex<Vec<LogMsg>>>,
}
impl Drop for LoggerGuard {
fn drop(&mut self) {
let guard = self.messages.lock();
let mut error_encountered = false;
for msg in &*guard {
if msg.level == Level::Error {
if !error_encountered {
eprintln!();
eprintln!("The following errors occurred while cove was running:");
eprintln!();
}
error_encountered = true;
eprintln!("{}", msg.content);
eprintln!();
}
}
}
}
#[derive(Debug, Clone)]
pub struct Logger {
event_tx: mpsc::UnboundedSender<()>,
messages: Arc<Mutex<Vec<LogMsg>>>,
}
#[async_trait]
impl MsgStore<LogMsg> for Logger {
async fn path(&self, id: &usize) -> Path<usize> {
Path::new(vec![*id])
}
async fn msg(&self, id: &usize) -> Option<LogMsg> {
self.messages.lock().get(*id).cloned()
}
async fn tree(&self, root_id: &usize) -> Tree<LogMsg> {
let msgs = self
.messages
.lock()
.get(*root_id)
.map(|msg| vec![msg.clone()])
.unwrap_or_default();
Tree::new(*root_id, msgs)
}
async fn first_root_id(&self) -> Option<usize> {
let empty = self.messages.lock().is_empty();
Some(0).filter(|_| !empty)
}
async fn last_root_id(&self) -> Option<usize> {
self.messages.lock().len().checked_sub(1)
}
async fn prev_root_id(&self, root_id: &usize) -> Option<usize> {
root_id.checked_sub(1)
}
async fn next_root_id(&self, root_id: &usize) -> Option<usize> {
let len = self.messages.lock().len();
root_id.checked_add(1).filter(|t| *t < len)
}
async fn oldest_msg_id(&self) -> Option<usize> {
self.first_root_id().await
}
async fn newest_msg_id(&self) -> Option<usize> {
self.last_root_id().await
}
async fn older_msg_id(&self, id: &usize) -> Option<usize> {
self.prev_root_id(id).await
}
async fn newer_msg_id(&self, id: &usize) -> Option<usize> {
self.next_root_id(id).await
}
async fn oldest_unseen_msg_id(&self) -> Option<usize> {
None
}
async fn newest_unseen_msg_id(&self) -> Option<usize> {
None
}
async fn older_unseen_msg_id(&self, _id: &usize) -> Option<usize> {
None
}
async fn newer_unseen_msg_id(&self, _id: &usize) -> Option<usize> {
None
}
async fn unseen_msgs_count(&self) -> usize {
0
}
async fn set_seen(&self, _id: &usize, _seen: bool) {}
async fn set_older_seen(&self, _id: &usize, _seen: bool) {}
}
impl Log for Logger {
fn enabled(&self, _metadata: &log::Metadata<'_>) -> bool {
true
}
fn log(&self, record: &log::Record<'_>) {
if !self.enabled(record.metadata()) {
return;
}
let mut guard = self.messages.lock();
let msg = LogMsg {
id: guard.len(),
time: OffsetDateTime::now_utc(),
level: record.level(),
content: format!("<{}> {}", record.target(), record.args()),
};
guard.push(msg);
let _ = self.event_tx.send(());
}
fn flush(&self) {}
}
impl Logger {
pub fn init(level: Level) -> (Self, LoggerGuard, mpsc::UnboundedReceiver<()>) {
let (event_tx, event_rx) = mpsc::unbounded_channel();
let logger = Self {
event_tx,
messages: Arc::new(Mutex::new(Vec::new())),
};
let guard = LoggerGuard {
messages: logger.messages.clone(),
};
log::set_boxed_logger(Box::new(logger.clone())).expect("logger already set");
log::set_max_level(level.to_level_filter());
(logger, guard, event_rx)
}
}
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