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//! This crate contains utility code for `rust-embed-for-web`.
//!
//! You generally don't want to use this crate directly, `rust-embed-for-web`
//! re-exports any necessary parts from this crate.
#![forbid(unsafe_code)]

mod file;
pub use file::*;

mod config;
pub use config::Config;

pub struct FileEntry {
    pub rel_path: String,
    pub full_canonical_path: String,
}

pub fn get_files<'t>(
    folder_path: &'t str,
    config: &'t Config,
    prefix: &'t str,
) -> impl Iterator<Item = FileEntry> + 't {
    walkdir::WalkDir::new(folder_path)
        .follow_links(true)
        .into_iter()
        .filter_map(|e| e.ok())
        .filter(|e| e.file_type().is_file())
        .filter_map(move |e| {
            let rel_path = path_to_str(e.path().strip_prefix(folder_path).unwrap());
            let rel_path = format!("{}{}", prefix, rel_path);
            let full_canonical_path =
                path_to_str(std::fs::canonicalize(e.path()).expect("Could not get canonical path"));

            let rel_path = if std::path::MAIN_SEPARATOR == '\\' {
                rel_path.replace('\\', "/")
            } else {
                rel_path
            };

            if !config.should_include(&rel_path) {
                return None;
            }

            Some(FileEntry {
                rel_path,
                full_canonical_path,
            })
        })
}

fn path_to_str<P: AsRef<std::path::Path>>(p: P) -> String {
    p.as_ref()
        .to_str()
        .expect("Path does not have a string representation")
        .to_owned()
}