oma-pm 0.63.1

APT package manager API abstraction library
Documentation 
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use std::path::Path;

use oma_fetch::{
    DownloadEntry, DownloadManager, DownloadSource, DownloadSourceType, Event, Summary,
    checksum::Checksum, reqwest::Client,
};
use oma_pm_operation_type::InstallEntry;
use oma_utils::url_no_escape::url_no_escape_times;
use spdlog::debug;

use crate::{
    CustomDownloadMessage,
    apt::{DownloadConfig, OmaAptError, OmaAptResult},
};

/// Download packages (inner)
pub async fn download_pkgs(
    client: &Client,
    download_pkg_list: &[InstallEntry],
    config: DownloadConfig<'_>,
    download_only: bool,
    custom_download_message: CustomDownloadMessage,
    callback: impl AsyncFn(Event),
) -> OmaAptResult<Summary> {
    let DownloadConfig {
        network_thread,
        download_dir,
        auth,
    } = config;

    debug!(
        "Download list: {download_pkg_list:?}, download to: {}",
        download_dir.unwrap_or(Path::new(".")).display()
    );

    if download_pkg_list.is_empty() {
        return Ok(Summary {
            success: vec![],
            failed: vec![],
        });
    }

    let mut download_list = vec![];
    let mut total_size = 0;

    for entry in download_pkg_list {
        let uris = entry.pkg_urls();
        let sources = uris
            .iter()
            .map(|x| {
                let (source_type, url) = if x.index_url.starts_with("file:") {
                    (
                        DownloadSourceType::Local(!download_only),
                        url_no_escape_times(&x.download_url, 1),
                    )
                } else {
                    let auth = auth.and_then(|auth| auth.find(&x.index_url));

                    (
                        DownloadSourceType::Http {
                            auth: auth.map(|x| (x.login.to_owned(), x.password.to_owned())),
                        },
                        x.download_url.clone(),
                    )
                };

                DownloadSource { url, source_type }
            })
            .collect::<Vec<_>>();

        debug!("Sources is: {:?}", sources);

        let msg = custom_download_message(entry);

        let download_entry = DownloadEntry::builder()
            .source(sources)
            .filename(apt_style_filename(entry))
            .dir(
                download_dir
                    .map(|x| x.to_path_buf())
                    .unwrap_or_else(|| ".".into()),
            )
            .allow_resume(true)
            .msg(msg)
            .maybe_hash({
                if let Some(checksum) = entry.sha256() {
                    Some(Checksum::from_sha256_str(checksum)?)
                } else if let Some(checksum) = entry.sha512() {
                    Some(Checksum::from_sha512_str(checksum)?)
                } else if let Some(checksum) = entry.md5() {
                    Some(Checksum::from_md5_str(checksum)?)
                } else {
                    None
                }
            })
            .build();

        total_size += entry.download_size();

        download_list.push(download_entry);
    }

    let downloader = DownloadManager::builder()
        .client(client)
        .download_list(&download_list)
        .maybe_threads(network_thread)
        .total_size(total_size)
        .build();

    let res = downloader
        .start_download(|event| async {
            callback(event).await;
        })
        .await
        .unwrap();

    if !res.is_download_success() {
        return Err(OmaAptError::FailedToDownload(res.failed.len()));
    }

    Ok(res)
}

/// Get apt style file name
fn apt_style_filename(entry: &InstallEntry) -> String {
    let package = entry.name_without_arch();
    let version = entry.new_version();
    let arch = entry.arch();

    let version = version.replace(':', "%3a");

    format!("{package}_{version}_{arch}.deb").replace("%2b", "+")
}