refactor: Move `launch_northstar` to own module (#338)

Part of #329

1 files changed, 68 insertions, 0 deletions

diff --git a/src-tauri/src/northstar/mod.rs b/src-tauri/src/northstar/mod.rs
index 7bd0b0a3..d26ecb64 100644
--- a/src-tauri/src/northstar/mod.rs
+++ b/src-tauri/src/northstar/mod.rs
@@ -3,6 +3,7 @@
 
 use crate::{check_mod_version_number, constants::CORE_MODS};
 use anyhow::anyhow;
+use app::{check_origin_running, get_host_os, GameInstall, InstallType};
 
 /// Returns the current Northstar version number as a string
 pub fn get_northstar_version_number(game_path: &str) -> Result<String, anyhow::Error> {
@@ -35,3 +36,70 @@ pub fn get_northstar_version_number(game_path: &str) -> Result<String, anyhow::E
 
     Ok(initial_version_number)
 }
+
+pub fn launch_northstar(
+    game_install: &GameInstall,
+    bypass_checks: Option<bool>,
+) -> Result<String, String> {
+    dbg!(game_install.clone());
+
+    let host_os = get_host_os();
+
+    // Explicitly fail early certain (currently) unsupported install setups
+    if host_os != "windows"
+        || !(matches!(game_install.install_type, InstallType::STEAM)
+            || matches!(game_install.install_type, InstallType::ORIGIN)
+            || matches!(game_install.install_type, InstallType::UNKNOWN))
+    {
+        return Err(format!(
+            "Not yet implemented for \"{}\" with Titanfall2 installed via \"{:?}\"",
+            get_host_os(),
+            game_install.install_type
+        ));
+    }
+
+    let bypass_checks = bypass_checks.unwrap_or(false);
+
+    // Only check guards if bypassing checks is not enabled
+    if !bypass_checks {
+        // Some safety checks before, should have more in the future
+        if get_northstar_version_number(&game_install.game_path).is_err() {
+            return Err(anyhow!("Not all checks were met").to_string());
+        }
+
+        // Require Origin to be running to launch Northstar
+        let origin_is_running = check_origin_running();
+        if !origin_is_running {
+            return Err(
+                anyhow!("Origin not running, start Origin before launching Northstar").to_string(),
+            );
+        }
+    }
+
+    // Switch to Titanfall2 directory for launching
+    // NorthstarLauncher.exe expects to be run from that folder
+    if std::env::set_current_dir(game_install.game_path.clone()).is_err() {
+        // We failed to get to Titanfall2 directory
+        return Err(anyhow!("Couldn't access Titanfall2 directory").to_string());
+    }
+
+    // Only Windows with Steam or Origin are supported at the moment
+    if host_os == "windows"
+        && (matches!(game_install.install_type, InstallType::STEAM)
+            || matches!(game_install.install_type, InstallType::ORIGIN)
+            || matches!(game_install.install_type, InstallType::UNKNOWN))
+    {
+        let ns_exe_path = format!("{}/NorthstarLauncher.exe", game_install.game_path);
+        let _output = std::process::Command::new("C:\\Windows\\System32\\cmd.exe")
+            .args(["/C", "start", "", &ns_exe_path])
+            .spawn()
+            .expect("failed to execute process");
+        return Ok("Launched game".to_string());
+    }
+
+    Err(format!(
+        "Not yet implemented for {:?} on {}",
+        game_install.install_type,
+        get_host_os()
+    ))
+}