1 files changed, 25 insertions, 0 deletions
diff --git a/src-tauri/src/core/modpack/archive.rs b/src-tauri/src/core/modpack/archive.rs
new file mode 100644
index 0000000..89aaef0
--- /dev/null
+++ b/src-tauri/src/core/modpack/archive.rs
@@ -0,0 +1,25 @@
+use std::{fs, io::Read, path::Path};
+
+pub(crate) type Archive = zip::ZipArchive<fs::File>;
+
+pub(crate) fn open(path: &Path) -> Result<Archive, String> {
+    let file = fs::File::open(path).map_err(|e| format!("Failed to open: {e}"))?;
+    zip::ZipArchive::new(file).map_err(|e| format!("Invalid zip: {e}"))
+}
+
+pub(crate) fn read_entry(archive: &mut Archive, name: &str) -> Option<String> {
+    let mut buf = String::new();
+    archive.by_name(name).ok()?.read_to_string(&mut buf).ok()?;
+    Some(buf)
+}
+
+pub(crate) fn read_json(archive: &mut Archive, name: &str) -> Result<serde_json::Value, String> {
+    let content = read_entry(archive, name).ok_or_else(|| format!("{name} not found"))?;
+    serde_json::from_str(&content).map_err(|e| e.to_string())
+}
+
+pub(crate) fn list_names(archive: &mut Archive) -> Vec<String> {
+    (0..archive.len())
+        .filter_map(|index| Some(archive.by_index_raw(index).ok()?.name().to_string()))
+        .collect()
+}