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use std::{fs, path::Path};
use super::archive;
pub(crate) trait ProgressReporter {
fn report(&mut self, current: usize, total: usize, name: &str);
}
impl<F> ProgressReporter for F
where
F: FnMut(usize, usize, &str),
{
fn report(&mut self, current: usize, total: usize, name: &str) {
self(current, total, name);
}
}
pub(crate) trait OverrideExtractor: Send + Sync {
fn extract(
&self,
path: &Path,
game_dir: &Path,
override_prefixes: &[String],
reporter: &mut dyn ProgressReporter,
) -> Result<(), String>;
}
#[derive(Debug, Default, Clone, Copy)]
pub(crate) struct ZipOverrideExtractor;
impl ZipOverrideExtractor {
pub(crate) fn new() -> Self {
Self
}
}
impl OverrideExtractor for ZipOverrideExtractor {
fn extract(
&self,
path: &Path,
game_dir: &Path,
override_prefixes: &[String],
reporter: &mut dyn ProgressReporter,
) -> Result<(), String> {
let mut archive = archive::open(path)?;
let all_names = archive::list_names(&mut archive);
let prefixes: Vec<&str> = override_prefixes
.iter()
.filter(|prefix| {
all_names
.iter()
.any(|name| name.starts_with(prefix.as_str()))
})
.map(String::as_str)
.collect();
let strip = |name: &str| -> Option<String> {
prefixes.iter().find_map(|prefix| {
let relative = name.strip_prefix(*prefix)?;
(!relative.is_empty()).then(|| relative.to_string())
})
};
let total = all_names
.iter()
.filter(|name| strip(name).is_some())
.count();
let mut current = 0;
for index in 0..archive.len() {
let mut entry = archive.by_index(index).map_err(|e| e.to_string())?;
let name = entry.name().to_string();
let Some(relative) = strip(&name) else {
continue;
};
let outpath = game_dir.join(&relative);
if !outpath.starts_with(game_dir) {
continue;
}
if entry.is_dir() {
fs::create_dir_all(&outpath).map_err(|e| e.to_string())?;
} else {
if let Some(parent) = outpath.parent() {
fs::create_dir_all(parent).map_err(|e| e.to_string())?;
}
let mut file = fs::File::create(&outpath).map_err(|e| e.to_string())?;
std::io::copy(&mut entry, &mut file).map_err(|e| e.to_string())?;
}
current += 1;
reporter.report(current, total, &relative);
}
Ok(())
}
}
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