check for launcher update

Cargo.lock

@@ -8,6 +8,7 @@ version = "0.2.3"
 dependencies = [
  "http_req",
  "rand",
+ "semver",
  "serde",
  "serde_json",
  "sha1_smol",
@@ -192,6 +193,12 @@ dependencies = [
  "untrusted",
 ]
 
+[[package]]
+name = "semver"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0293b4b29daaf487284529cc2f5675b8e57c61f70167ba415a463651fd6a918"
+
 [[package]]
 name = "serde"
 version = "1.0.179"

Cargo.toml

@@ -18,6 +18,7 @@ sha1_smol = "1.0.0"
 serde = { version = "1.0.179", features = ["derive"] }
 serde_json = "1.0.104"
 rand = "0.8.5"
+semver = "1.0.18"
 
 [build-dependencies]
 winres = "0.1.12"

src/http.rs

@@ -2,10 +2,21 @@ use std::{fs, io::Write, path::Path, str};
 
 pub fn get_body(url: &str) -> Vec<u8> {
     let mut res: Vec<u8> = Vec::new();
-    http_req::request::get(url, &mut res).unwrap_or_else(|error| {
+    let req = http_req::request::Request::new(&url.try_into().unwrap())
+        .header(
+            "User-Agent",
+            "AlterWare Launcher | github.com/mxve/alterware-launcher",
+        )
+        .send(&mut res)
+        .unwrap_or_else(|error| {
             panic!("\n\n{}:\n{:?}", "Error", error);
         });
 
+    if req.status_code() == http_req::response::StatusCode::new(302) {
+        let location = req.headers().get("Location").unwrap().as_str();
+        return get_body(location);
+    }
+
     res
 }
 

src/main.rs

@@ -1,6 +1,8 @@
 mod http;
+use semver::Version;
 use std::time::{SystemTime, UNIX_EPOCH};
 use std::{fs, path::PathBuf};
+use std::{thread, time};
 
 #[derive(serde::Deserialize, serde::Serialize)]
 struct CdnFile {
@@ -17,6 +19,7 @@ struct Game<'a> {
 }
 
 const MASTER: &str = "https://master.alterware.dev";
+const REPO: &str = "mxve/alterware-launcher";
 
 fn get_cache_buster() -> u64 {
     match SystemTime::now().duration_since(UNIX_EPOCH) {
@@ -31,6 +34,28 @@ fn get_file_sha1(path: &PathBuf) -> String {
     sha1.digest().to_string()
 }
 
+fn check_for_launcher_update() {
+    let current_version: Version = Version::parse(env!("CARGO_PKG_VERSION")).unwrap();
+    let github_body = http::get_body_string(
+        format!("https://api.github.com/repos/{}/releases/latest", REPO).as_str(),
+    );
+    let github_json: serde_json::Value = serde_json::from_str(&github_body).unwrap();
+    let latest_version = github_json["tag_name"]
+        .to_string()
+        .replace(['v', '"'].as_ref(), "");
+    let latest_version = Version::parse(&latest_version).unwrap();
+
+    if current_version < latest_version {
+        println!(
+            "A new version of the AlterWare launcher is available: {}",
+            latest_version
+        );
+        println!("Download it at https://github.com/{}/releases/latest", REPO);
+        println!("Launching in 10 seconds..");
+        thread::sleep(time::Duration::from_secs(10));
+    }
+}
+
 fn update(game: &Game) {
     let cdn_info: Vec<CdnFile> = serde_json::from_str(&http::get_body_string(
         format!("{}/files.json?{}", MASTER, get_cache_buster()).as_str(),
@@ -83,6 +108,8 @@ fn launch(file_path: &PathBuf) {
 }
 
 fn main() {
+    check_for_launcher_update();
+
     let mut args: Vec<String> = std::env::args().collect();
 
     let games_json = http::get_body_string(format!("{}/games.json", MASTER).as_str());