mod errors;
pub mod feed;
pub mod fetch;
pub mod history;
pub mod prelude;
mod subscriptions;

use feed::{FeedFind, FeedGet};
use fetch::FetchDownload;
use history::{HistoryAdd, HistoryFind};
use prelude::*;

pub fn run(
    subscriptions: &str,
    history: &str,
    site: &str,
    feed_find: FeedFind,
    feed_get: FeedGet,
    history_find: HistoryFind,
    history_add: HistoryAdd,
    fetch_download: FetchDownload,
) -> Result<()> {
    for channel_name in subscriptions::lines_from(subscriptions)? {
        println!("Channel: {}", channel_name);
        let feed_url = feed_find(site, &channel_name)?;
        for entry in feed_get(&feed_url)?.entries() {
            if let Some(link) = entry.links().get(0).cloned() {
                if !history_find(&link, history)? {
                    println!("Downloading {}: {}", &channel_name, entry.title().as_str());
                    fetch_download(&link)?;
                    history_add(&link, history)?;
                }
            }
        }
    }
    Ok(())
}