shifty 0.1.7

A simple cli tool to keep track of your shifts at work
Documentation 
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use chrono::{NaiveDate, Utc};
use std::{error::Error, fmt};
#[derive(Debug)]
struct FormatError;

impl Error for FormatError {}
impl fmt::Display for FormatError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "Input not formatted correctly")
    }
}

pub fn parse_date(date: Option<String>) -> Result<String, Box<dyn Error>> {
    if let Some(date) = date {
        let date_parsed = NaiveDate::parse_from_str(&date, "%d/%m/%Y")?;
        return Ok(date_parsed.format("%d/%m/%Y").to_string());
    } else {
        return Ok(Utc::now().format("%d/%m/%Y").to_string());
    }
}

pub fn parse_premium(premium: f32) -> Result<f32, Box<dyn Error>> {
    if premium == 0. {
        return Ok(0.);
    } else {
        return Ok(premium / 100.);
    }
}

pub fn parse_time(time: Option<String>, default: f32) -> Result<f32, Box<dyn Error>> {
    if let Some(time) = time {
        if time.split(':').count() == 2 {
            let split = time.split(':').collect::<Vec<&str>>();
            Ok(split[0].parse::<f32>()? + (split[1].parse::<f32>()? / 60.))
        } else {
            Err(Box::new(FormatError))
        }
    } else {
        Ok(default)
    }
}

pub fn parse_month(date: Option<String>) -> Result<String, Box<dyn Error>> {
    if let Some(date) = date {
        NaiveDate::parse_from_str(&format!("01/{}", &date), "%d/%m/%Y")?;
        return Ok(date);
    } else {
        return Ok(Utc::now().format("%m/%Y").to_string());
    }
}