papa 3.0.0-alpha

A cli mod manager for the Northstar launcher
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use std::{fs, path::Path};

use crate::model::ModName;
use anyhow::Result;
use regex::Regex;
use tracing::debug;

pub fn validate_modnames(input: &str) -> Result<ModName, String> {
    let Ok(re) = Regex::new(r"^(\w+)\.(\w+)(?:@(\d+\.\d+\.\d+))?$")else {
        return Err("Unable to compile regex".to_string());
    };

    if let Some(captures) = re.captures(input) {
        let mut name = ModName::default();
        if let Some(author) = captures.get(1) {
            name.author = author.as_str().to_string();
        }

        if let Some(n) = captures.get(2) {
            name.name = n.as_str().to_string();
        }

        name.version = captures.get(3).map(|v| v.as_str().to_string());

        Ok(name)
    } else {
        Err(format!(
            "Mod name '{input}' should be in 'Author.ModName' format"
        ))
    }
}

pub fn to_file_size_string(size: u64) -> String {
    if size / 1_000_000 >= 1 {
        let size = size as f64 / 1_048_576f64;

        format!("{:.2} MB", size)
    } else {
        let size = size as f64 / 1024f64;
        format!("{:.2} KB", size)
    }
}

pub fn ensure_dir(dir: impl AsRef<Path>) -> Result<()> {
    let dir = dir.as_ref();

    debug!("Checking if path '{}' exists", dir.display());
    if !dir.try_exists()? {
        debug!("Path '{}' doesn't exist, creating it", dir.display());
        fs::create_dir_all(dir)?;
    } else {
        debug!("Path '{}' already exists", dir.display());
    }

    Ok(())
}