Added Offline Functionality

FCLauncher/src-tauri/src/ftp.rs

@@ -18,9 +18,7 @@ pub fn test_cred(username: &str, password: &str) -> bool{
 
 
 fn ftp_connection(username: &str, password: &str) -> Result<NativeTlsFtpStream, FtpError>{
-    let ftp_stream = NativeTlsFtpStream::connect("gitea.piwalker.net:21").unwrap_or_else(|err|
-        panic!("{}", err)
-    );
+    let ftp_stream = NativeTlsFtpStream::connect("gitea.piwalker.net:21")?;
     let cert = include_bytes!("../res/vsftpd.crt");
     let cert = Certificate::from_pem(cert).unwrap();
     let mut ftp_stream = ftp_stream.into_secure(NativeTlsConnector::from(TlsConnector::builder().add_root_certificate(cert).build().unwrap()), "gitea.piwalker.net").unwrap();
@@ -32,7 +30,7 @@ fn ftp_connection(username: &str, password: &str) -> Result<NativeTlsFtpStream,
 }
 
 pub fn ftp_retr(window: Option<tauri::Window>, file: PathBuf , mut writer: impl Write, mut callback: impl FnMut(Option<tauri::Window>, usize, usize)) -> Result<bool, FtpError> {
-    let mut ftp_stream = ftp_connection_anonymous().unwrap();
+    let mut ftp_stream = ftp_connection_anonymous()?;
     let file = file.to_str().unwrap().replace("\\", "/");
     let size = ftp_stream.size(&file)?;
     let mut total = 0;

FCLauncher/src-tauri/src/modpack.rs

@@ -7,10 +7,12 @@ use std::fs::File;
 use std::process::Command;
 use std::{io::Cursor, path::PathBuf};
 use std::io::{Read, Seek, Write};
+use serde::de::value::Error;
 use serde_json::Value;
 use serde::Serialize;
 use serde::Deserialize;
 use crate::util;
+use std::fs;
 
 
 
@@ -47,6 +49,10 @@ fn check_modpack_needs_update(id: String) -> bool{
     }
     
     let versions = get_versions(id);
+    if !versions.is_ok() {
+        return false;
+    }
+    let versions = versions.unwrap();
     let latest = versions[versions.len()-1].version.clone();
 
     let mut file = File::open(get_local_data_directory().join("prism").join("instances").join(instance_name).join(".minecraft").join("version.txt")).unwrap();
@@ -72,7 +78,7 @@ pub async fn launch_modpack(window: tauri::Window, id: String){
 }
 
 fn install_modpack(window: tauri::Window, id: String){
-    let versions = get_versions(id.clone());
+    let versions = get_versions(id.clone()).unwrap();
     let path = env::temp_dir().join(format!("{}.mrpack", get_modpack_name(id.clone())));
     let mut file = File::create(path.clone()).unwrap();
     let ftp_path = PathBuf::new().join(id.clone()).join(versions[versions.len()-1].file.clone().as_str());
@@ -135,7 +141,24 @@ pub fn get_modpacks() -> Vec<ModpackEntry> {
             let mut buf = Cursor::new(vec![]);
             ftp::ftp_retr(None, PathBuf::new().join("modpacks.json"), &mut buf, |_, _, _| return);
             buf.rewind();
-            let v: Value = serde_json::from_reader(buf).unwrap();
+            let res = serde_json::from_reader(buf);
+            if !res.is_ok() {
+                let paths = fs::read_dir(get_local_data_directory().join("prism").join("instances")).unwrap();
+                for path in paths {
+                    let path = path.unwrap();
+                    if fs::metadata(path.path()).unwrap().is_file() {
+                        continue;
+                    }
+                    let name = path.file_name().into_string().unwrap();
+                    if name.starts_with(".") {
+                        continue;
+                    }
+                    
+                    modpacks.push(ModpackEntry{name: name.clone(), id: name})
+                }
+                return modpacks.clone()
+            }
+            let v: Value = res.unwrap();
             println!("{}", v[0]["name"]);
             for pack in v.as_array().unwrap() {
                 modpacks.push(ModpackEntry{name: pack["name"].as_str().unwrap().to_string(), id: pack["id"].as_str().unwrap().to_string()});
@@ -145,16 +168,16 @@ pub fn get_modpacks() -> Vec<ModpackEntry> {
     }
 }
 
-fn get_versions(id: String) -> Vec<VersionEntry> {
+fn get_versions(id: String) -> Result<Vec<VersionEntry>,Box<dyn std::error::Error>> {
     let mut versions: Vec<VersionEntry> = Vec::new();
     let mut buf = Cursor::new(vec![]);
     ftp::ftp_retr(None, PathBuf::new().join(id).join("versions.json"), &mut buf, |_, _, _| return);
     buf.rewind();
-    let v: Value = serde_json::from_reader(buf).unwrap();
+    let v: Value = serde_json::from_reader(buf)?;
     for version in v.as_array().unwrap() {
         versions.push(VersionEntry{version: version["Version"].as_str().unwrap().to_string(), file: version["File"].as_str().unwrap().to_string(), date: version["Date"].as_str().unwrap().to_string()});
     }
-    return versions.clone();
+    return Ok(versions.clone());
 }
 
 fn get_java_version(mc_version: &str) -> u8{

FCLauncher/src-tauri/tauri.conf.json

@@ -6,7 +6,7 @@
   },
   "package": {
     "productName": "FCLauncher",
-    "version": "0.0.0"
+    "version": "1.0.1"
   },
   "tauri": {
     "allowlist": {