workdays is a Rust library for computing work days and handling work calendars, inspired by the WORKDAY function in Excel. It provides functionality to define custom work weeks, add holidays, and compute dates based on a given number of work days.

Features

Compute end dates based on work days
Calculate the number of work days between two dates
Parse and handle work calendar configurations (YAML or JSON)
Support for custom work days and holidays
Flexible weekday parsing

Installation

Add workdays as a dependency in your Cargo.toml:

cargo add workdays

Usage

Here's a quick example:

use workdays::WorkCalendar;
use chrono::NaiveDate;
use std::str::FromStr;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let mut calendar = WorkCalendar::new();
    calendar.add_holiday(NaiveDate::from_ymd_opt(2023, 12, 25).unwrap());
    calendar.set_work_days("Mon,Tue,Wed,Thu,Fri")?;

    let start_date = NaiveDate::from_ymd_opt(2023, 8, 21).unwrap();
    let days_worked = 20;

    let (end_date, calendar_duration) = calendar.compute_end_date(start_date, days_worked)?;
    println!("End date: {}", end_date);
    println!("Calendar duration: {} days", calendar_duration.num_days());

    // Using FromStr to create a WorkCalendar from YAML or JSON
    let config = r#"
    work_days:
      - Monday
      - Tuesday
      - Wednesday
    holidays:
      - 2023-12-25
    "#;
    let custom_calendar = WorkCalendar::from_str(config)?;
    println!("Is Monday a work day? {}", custom_calendar.is_work_day(&chrono::Weekday::Mon));

    Ok(())
}

License

This project is licensed under the MIT License - see the LICENSE file for details.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Acknowledgments

Inspired by the WORKDAY function in Excel