Added more stuff

launcher/src/java.rs

@@ -0,0 +1,54 @@
+use std::env;
+use std::io::{Cursor, Seek, Read};
+use std::path::{Components, Path, PathBuf};
+use flate2::read::GzDecoder;
+use tar::Archive;
+
+
+use crate::system_dirs::get_local_data_directory;
+use crate::ftp::{self, ftp_get_size};
+use crate::util;
+
+fn check_java(version: u8) -> bool {
+    let dir = get_local_data_directory().join("java").join(format!("java-{}-{}", version, if env::consts::OS == "windows" { "win" } else {"lin"}));
+    dir.exists()
+}
+
+pub fn install_java(version: u8) {
+    if check_java(version) {
+        return;
+    }
+    let ftp_dir = PathBuf::new().join("java").join(format!("java-{}-{}", version, if env::consts::OS == "windows" { "win.zip" } else {"lin.tar.gz"}));
+    let mut buff = Cursor::new(vec![]);
+    let mut total: usize = 0;
+    let size = ftp_get_size(ftp_dir.clone()).unwrap();
+    ftp::ftp_retr(ftp_dir, &mut buff, |data| util::download_callback(data, &mut total, size)).unwrap();
+
+    std::fs::create_dir_all(get_local_data_directory().join("java").join(format!("java-{}-{}", version, if env::consts::OS == "windows" { "win" } else {"lin"}))).unwrap();
+    buff.rewind().unwrap();
+    if env::consts::OS != "windows" {
+        let tar = GzDecoder::new(buff);
+        let mut archive = Archive::new(tar);
+        if !unpack_archive(archive, get_local_data_directory().join("java").join(format!("java-{}-lin", version))).is_ok() {
+            std::fs::remove_dir_all(get_local_data_directory().join("java").join(format!("java-{}-lin", version))).unwrap();
+        }
+    } else {
+        if !zip_extract::extract(buff, get_local_data_directory().join("java").join(format!("java-{}-win", version)).as_path(), true).is_ok() {
+            std::fs::remove_dir_all(get_local_data_directory().join("java").join(format!("java-{}-win", version))).unwrap();
+        }
+    }
+
+}
+
+fn unpack_archive<T: Read>(mut archive: Archive<T>, dst: PathBuf) -> Result<(), Box<dyn std::error::Error>> {
+    for file in archive.entries()? {
+        let path = PathBuf::new().join(dst.clone());
+        let mut file = file?;
+        let file_path = file.path()?;
+        let mut file_path = file_path.components();
+        let _ = file_path.next();
+        let file_path = file_path.as_path();
+        file.unpack(path.join(file_path))?;
+    }
+    Ok(())
+}