Remove date from filename Rust

clean_filename.rs

use regex::Regex;

fn clean_filename(filename: &str) -> Option<String> {
    // Regex to match the date/time prefix
    let date_prefix_re = Regex::new(
        r"^\d{4}-\d{2}-\d{2}([-T]\d{2}([:-]\d{2})?([:-]\d{2})?)?-",
    )
    .unwrap();
    // Regex to remove the `.md` extension
    let extension_re = Regex::new(r"\.md$").unwrap();

    // Step 1: Remove the date/time prefix
    let without_date = date_prefix_re.replace(filename, "").to_string();

    // Step 2: Remove the `.md` extension
    let cleaned = extension_re.replace(&without_date, "").to_string();

    Some(cleaned)
}

fn main() {
    let filenames = vec![
        "my-file.md",
        "2024-01-01-my-file-is-great.md",
        "2024-01-01-15-30-my-file-is-awesome.md",
        "2024-01-01-15-30-12-my-file-is-amazing-.md",
        "2024-01-01T15:30-my-file-just.md",
        "2024-01-01T15:30:12-myfile.md",
    ];

    for filename in filenames {
        match clean_filename(filename) {
            Some(result) => println!("{} -> {}", filename, result),
            None => println!("{} -> Invalid format", filename),
        }
    }
}