Add naive game path detection

Author: GeckoEidechse

src/app.rs

@@ -1,6 +1,6 @@
 use core::time;
 
-use self::util::{apply_launcher_pr, apply_mods_pr};
+use self::util::{apply_launcher_pr, apply_mods_pr, find_game_install_path};
 use self_update::cargo_crate_version;
 
 mod util;
@@ -96,6 +96,25 @@ impl eframe::App for TemplateApp {
 
             ui.label("Titanfall2 install location:");
             ui.text_edit_singleline(game_install_path);
+            if ui.button("Try detect install path").clicked() {
+                match find_game_install_path() {
+                    Ok(found_install_path) => {
+                        println!("Found install at {}", found_install_path);
+                        *game_install_path = found_install_path;
+                    }
+                    Err(err) => {
+                        println!("{}", err);
+                        egui::Frame::popup(ui.style()).show(ui, |ui| {
+                            ui.label(
+                                egui::RichText::new(format!("Error: {}", err))
+                                    .color(egui::Color32::RED),
+                            );
+                        });
+
+                        *value = 1;
+                    }
+                }
+            }
 
             ui.label(""); // simple spacer
 

src/app/util.rs

@@ -347,6 +347,28 @@ fn check_game_path(game_install_path: &str) -> Result<(), anyhow::Error> {
     Ok(())
 }
 
+/// Tries to find the game install location. In its current form it only checks a few hardcoded locations
+pub fn find_game_install_path() -> Result<String, anyhow::Error> {
+    // List of predefined install locations
+    // Parsing VDF for Steam and Windows registry for Origin would be nicer
+    // but requires a lot more investigation on how to do that exactly.
+    let potential_locations = [
+        "C:\\Program Files (x86)\\Steam\\steamapps\\common\\Titanfall2", // Default Steam
+        "C:\\Program Files (x86)\\Origin Games\\Titanfall2",             // Default Origin
+        "C:\\Program Files\\EA Games\\Titanfall2",                       // Default EA Play
+    ];
+
+    for location in potential_locations {
+        // Check if valid folder and valid Titanfall2 install path
+        if std::path::Path::new(location).exists() && check_game_path(location).is_ok() {
+            return Ok(location.to_string());
+        }
+    }
+    return Err(anyhow!(
+        "Could not auto-detect game install location! Please enter it manually."
+    ));
+}
+
 pub fn apply_launcher_pr(
     pr_number: i64,
     game_install_path: &str,