Rust Logger

Concept:

Fig 1. Logger Output

RustLogger is a facility for inserting time-date stamped string messages into the console and a text file simultaneously. You can also select for console alone or text file alone.

Design:

There is one struct, Logger, with methods and several functions in this design: Methods:

new() -> Self
Create new Logger which has no attached file and writes to console.
init(f:File, con:bool) -> Self
Create new Logger attached to f and writes to console only if con is true.
console(&mut self, con:bool)
sets console writing to true or false.
file(&mut self, f:File)
Sets or resets log file f.
opt(&mut self, f:Option<File>
sets or resets Logger::fl to the option provided.
open(&mut self, s:&str) -> bool
Opens logger, truncating log file if it exists.
open_append(&mut self, s:&str) -> bool
Opens logger, appending to log file if it exists.
ts_write(&mut self, s:&str) -> &mut Self
Writes date_time stamp then string s to the log target(s).
write(&mut self, s:&str) -> &mut Self
Writes string s to the log target(s).
close(&mut self)
Closes logger by setting Logger::fl to the option None.

Functions:

open_file(s:&str, mode:OpenMode) -> Option<File>
Opens file with OpenMode::Append or OpenMode::Truncate. Returns option that may be used with Logger::opt(f:Option<File>).
file_exists(s:&str) -> bool
Does this file exist?
remove_file(s:&str) -> bool
Delete file if it exists and has appropriate access.
file_contains(fl:&str, ts:&str) -> bool
Does the file named fl contain the string ts?
file_contents(fl:&str)
Display text file contents on console.

Operation:

This is intended to be a very simple logger - easy to use and with virtually no setup or configuration.

Build:

Download and, in a command prompt, cargo build or cargo run.

Status:

There may be some changes after I start building bigger Rust applications.