flexi_logger 0.7.0

use log::Record;
use chrono::Local;
use std::thread;

/// A logline-formatter that produces log lines like <br>
/// ```INFO [my_prog::some_submodule] Task successfully read from conf.json```
pub fn default_format(record: &Record) -> String {
    format!(
        "{} [{}] {}",
        record.level(),
        record.module_path().unwrap_or("<unnamed>"),
        record.args()
    )
}

/// A logline-formatter that produces log lines like
/// <br>
/// ```[2016-01-13 15:25:01.640870 +01:00] INFO [src/foo/bar:26] Task successfully read from conf.json```
/// <br>
/// i.e. with timestamp and file location.
pub fn opt_format(record: &Record) -> String {
    format!(
        "[{}] {} [{}:{}] {}",
        Local::now().format("%Y-%m-%d %H:%M:%S%.6f %:z"),
        record.level(),
        record.file().unwrap_or("<unnamed>"),
        record.line().unwrap_or(0),
        &record.args()
    )
}

/// A logline-formatter that produces log lines like
/// <br>
/// ```[2016-01-13 15:25:01.640870 +01:00] INFO [foo::bar] src/foo/bar.rs:26: Task successfully read from conf.json```
/// <br>
/// i.e. with timestamp, module path and file location.
pub fn detailed_format(record: &Record) -> String {
    format!(
        "[{}] {} [{}] {}:{}: {}",
        Local::now().format("%Y-%m-%d %H:%M:%S%.6f %:z"),
        record.level(),
        record.module_path().unwrap_or("<unnamed>"),
        record.file().unwrap_or("<unnamed>"),
        record.line().unwrap_or(0),
        &record.args()
    )
}

/// A logline-formatter that produces log lines like
/// <br>
/// ```[2016-01-13 15:25:01.640870 +01:00] T[taskreader] INFO [src/foo/bar:26] Task successfully read from conf.json```
/// <br>
/// i.e. with timestamp, thread name and file location.
pub fn with_thread(record: &Record) -> String {
    format!(
        "[{}] T[{:?}] {} [{}:{}] {}",
        Local::now().format("%Y-%m-%d %H:%M:%S%.6f %:z"),
        thread::current().name().unwrap_or("<unnamed>"),
        record.level(),
        record.file().unwrap_or("<unnamed>"),
        record.line().unwrap_or(0),
        &record.args()
    )
}