src/main.rs


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use std::{env, fs, path::PathBuf};

use color_eyre::eyre::Result;
use indicatif::{ProgressBar, ProgressStyle};

mod gpx;
mod layer;
mod renderer;

fn main() -> Result<()> {
    color_eyre::install()?;

    let progress_style =
        ProgressStyle::with_template("[{elapsed}] {prefix:.cyan} {wide_bar} {pos:.green}/{len}")?;

    let gpx_folder = env::args().nth(1).unwrap();
    println!("Reading from {gpx_folder}");

    let mut tracks = Vec::new();
    for file in fs::read_dir(gpx_folder).unwrap() {
        let file = file.unwrap();
        let data = gpx::extract_from_file(file.path(), gpx::Compression::None).unwrap();
        tracks.push(data);
    }

    for zoom in 0..=19 {
        println!("Doing level {zoom}");

        let bar =
            ProgressBar::new(tracks.len().try_into().unwrap()).with_style(progress_style.clone());
        bar.set_prefix("Rendering heat zones");
        let counter =
            renderer::render_heatcounter(zoom, &tracks, |x| bar.inc(x.try_into().unwrap()));
        bar.finish();

        let target = ["tiles", &zoom.to_string()].iter().collect::<PathBuf>();
        fs::create_dir(&target)?;

        let bar = ProgressBar::new(counter.tile_count().try_into().unwrap())
            .with_style(progress_style.clone());
        bar.set_prefix("Saving heat tiles");
        renderer::lazy_colorization(&counter, &target, |x| bar.inc(x.try_into().unwrap()))?;
        bar.finish();
    }

    Ok(())
}