refactor(workspace): decompose project into multiple crates

crates/core/src/logger/mod.rs

@@ -0,0 +1,79 @@
+//
+// Copyright (c) 2025-2026 rustmailer.com (https://rustmailer.com)
+//
+// This file is part of the Bichon Email Archiving Project
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+use crate::logger::file::setup_file_logger;
+use crate::settings::cli::SETTINGS;
+use chrono::Local;
+use std::process;
+use tracing::Level;
+use tracing_log::LogTracer;
+use tracing_subscriber::fmt::{format::Writer, time::FormatTime};
+
+mod file;
+
+struct LocalTimer;
+
+impl FormatTime for LocalTimer {
+    fn format_time(&self, w: &mut Writer<'_>) -> std::fmt::Result {
+        write!(w, "{}", Local::now().format("%Y-%m-%dT%H:%M:%S%.3f%:z"))
+    }
+}
+
+pub fn initialize_logging() {
+    let level = validate_log_level(&SETTINGS.bichon_log_level);
+    if matches!(level, Level::DEBUG) || matches!(level, Level::TRACE) {
+        LogTracer::init().unwrap();
+    }
+    if SETTINGS.bichon_log_to_file {
+        setup_file_logger(level).unwrap();
+    } else {
+        setup_stdout_logger(level).unwrap();
+    }
+}
+
+fn setup_stdout_logger(level: Level) -> Result<(), tracing::dispatcher::SetGlobalDefaultError> {
+    let with_ansi = SETTINGS.bichon_ansi_logs;
+
+    let format = tracing_subscriber::fmt::format()
+        .with_level(true)
+        .with_target(true)
+        .with_timer(LocalTimer);
+
+    let subscriber = tracing_subscriber::fmt()
+        .with_max_level(level)
+        .with_ansi(with_ansi)
+        .with_writer(std::io::stdout)
+        .event_format(format)
+        .finish();
+
+    tracing::subscriber::set_global_default(subscriber)
+}
+
+fn validate_log_level(value: &String) -> Level {
+    match value.parse::<Level>() {
+        Ok(level) => level,
+        Err(_) => {
+            eprintln!(
+                "Invalid log level specified. Use one of: error, warn, info, debug, trace. 
+                The log level you currently specified is 'rustmailer_log_level'='{}'",
+                value
+            );
+            process::exit(1);
+        }
+    }
+}