main.rs

#![allow(warnings)]
mod libs;

use libs::constants::get_project_root;
use libs::structures::models::Galaxy;
use libs::utils::console_handler::{get_args, get_file_path_from_args, get_show};
use libs::utils::files_handler::read_data;
use libs::utils::hubble_handler::{calculate_age, get_h0};
use libs::utils::misc_handler::{format_f64, print_disclaimers};

fn main() {
    let args: Vec<String> = match get_args() {
        Ok(val) => val,
        Err(_) => panic!("Error while getting command line arguments: Failed to parse arguments."),
    };

    let file_path: String = match get_file_path_from_args(&args) {
        Ok(val) => val,
        Err(_) => get_project_root()
            .unwrap()
            .join("data")
            .join("galaxies.csv")
            .to_str()
            .unwrap()
            .to_string(),
    };

    let data: Vec<Galaxy> = match read_data(&file_path, get_show(&args).unwrap_or_default()) {
        Ok(val) => val,
        Err(_) => panic!("Error while reading data file at {}.", file_path),
    };
    let h0: f64 = match get_h0(&data) {
        Ok(val) => val,
        Err(_) => panic!("Error while calculating Hubble Constant."),
    };

    let age: f64 = match calculate_age(h0) {
        Ok(val) => val,
        Err(_) => panic!("Error while calculating age of the universe."),
    };

    print_disclaimers();

    println!(
        "Hubble Constant was calculated to be:\t{} km/s/Mpc",
        format_f64(h0).unwrap_or_else(|_| String::from("0.0"))
    );
    println!(
        "Age of the Universe:\t{} years",
        format_f64(age).unwrap_or_else(|_| String::from("0.0"))
    );
}

#[cfg(test)]
mod tests;