lowkey improve logging

src/util/logging.rs

@@ -0,0 +1,64 @@
+use std::{
+    fs::File,
+    io::Write,
+    sync::{LazyLock, Mutex},
+    time::SystemTime,
+};
+
+pub struct Logger {
+    file: Mutex<File>,
+}
+
+static LOGGER: LazyLock<Logger> = LazyLock::new(|| Logger {
+    file: File::options()
+        .create(true)
+        .append(true)
+        .open(crate::util::consts::path::APP_LOG.as_path())
+        .unwrap()
+        .into(),
+});
+
+impl log::Log for Logger {
+    fn enabled(&self, metadata: &log::Metadata) -> bool {
+        metadata.level() <= log::Level::Info
+    }
+
+    fn flush(&self) {}
+
+    fn log(&self, record: &log::Record) {
+        if self.enabled(record.metadata()) {
+            self.log_to_stderr(record);
+            self.log_to_file(record);
+        }
+    }
+}
+
+impl Logger {
+    pub fn init(level: log::LevelFilter) {
+        log::set_logger(&*LOGGER)
+            .map(|()| log::set_max_level(level))
+            .unwrap();
+    }
+
+    fn log_to_file(&self, record: &log::Record) {
+        let mut file = self.file.lock().unwrap();
+        write!(
+            file,
+            "[{}][{}]\n{}\n\n",
+            humantime::format_rfc3339_seconds(SystemTime::now()),
+            record.level(),
+            record.args()
+        )
+        .unwrap();
+        file.flush().unwrap();
+    }
+
+    fn log_to_stderr(&self, record: &log::Record) {
+        eprintln!(
+            "[{}][{}]\n{}",
+            humantime::format_rfc3339_seconds(SystemTime::now()),
+            record.level(),
+            record.args()
+        )
+    }
+}