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use std::{
collections::VecDeque,
fs::File,
io::{Error, Write},
};
pub struct Log {
queue: VecDeque<String>,
file: Option<File>,
}
impl Log {
pub fn new() -> Self {
Self {
queue: VecDeque::new(),
file: None,
}
}
/// Sets up the logging file
/// NOTE: Doesn't propogate own errors, pushes into queue
///
/// * `filename`: Optional absolute/relative path to the file to log to
pub fn with_file(&mut self, filename: Option<&str>) {
if filename.is_none() {
return;
}
let file = File::options().append(true).open(filename.unwrap());
if let Ok(file) = file {
self.file = Some(file);
} else {
self.queue
.push_back(format!("Could not open log file: {}", filename.unwrap()));
}
}
/// Push a message into the log queue
/// Writes to the log file if setup
/// NOTE: Does not propogate own errors, pushes into queue
///
/// * `msg`: message to be logged
pub fn push(&mut self, msg: &str) {
self.queue.push_back(msg.to_owned());
if self.file.is_some() {
self.file
.as_ref()
.unwrap()
.write_all(msg.as_bytes())
.map_err(|e| {
self.queue
.push_back(format!("Failed to write to file: {}", e))
})
.ok();
}
}
/// Pops a message off the log queue
pub fn pop(&mut self) -> Option<String> {
self.queue.pop_front()
}
}