feat: add function to set osu! user config values

src-tauri/src/commands.rs

@@ -196,7 +196,7 @@ pub fn get_osu_version(folder: String) -> String {
     let osu_user_config = get_osu_user_config(path.clone());
     return osu_user_config
         .and_then(|config| config.get("LastVersion").cloned())
-        .unwrap_or_else(|| "failed.".to_string());
+        .unwrap_or_else(|| "failed".to_string());
 }
 
 #[tauri::command]

src-tauri/src/utils.rs

@@ -1,3 +1,5 @@
+use std::fs;
+use std::io::Write;
 use std::path::Path;
 
 pub fn check_folder_completeness<P: AsRef<Path>>(folder_path: P, required_files: &[&str]) -> f32 {
@@ -45,6 +47,53 @@ pub fn get_osu_user_config<P: AsRef<Path>>(
     return Some(config_map);
 }
 
+pub fn set_osu_user_config_value<P: AsRef<Path>>(
+    osu_folder_path: P,
+    key: &str,
+    value: &str,
+) -> std::io::Result<()> {
+    // Determine the config file path
+    let current_user = std::env::var("USERNAME").unwrap_or_else(|_| "Admin".to_string());
+    let osu_config_path = osu_folder_path
+        .as_ref()
+        .join(format!("osu!.{}.cfg", current_user));
+
+    // Read existing config into a Vec of lines
+    let mut lines = if osu_config_path.exists() {
+        fs::read_to_string(&osu_config_path)?
+            .lines()
+            .map(|line| line.to_string())
+            .collect::<Vec<String>>()
+    } else {
+        Vec::new()
+    };
+
+    let mut found = false;
+
+    for line in lines.iter_mut() {
+        if let Some((existing_key, _)) = line.split_once(" = ") {
+            if existing_key.trim() == key {
+                *line = format!("{} = {}", key, value);
+                found = true;
+                break;
+            }
+        }
+    }
+
+    // If the key was not found, append it
+    if !found {
+        lines.push(format!("{} = {}", key, value));
+    }
+
+    // Write back the file
+    let mut file = fs::File::create(&osu_config_path)?;
+    for line in lines {
+        writeln!(file, "{}", line)?;
+    }
+
+    Ok(())
+}
+
 pub fn get_osu_config<P: AsRef<Path>>(
     osu_folder_path: P,
 ) -> Option<std::collections::HashMap<String, String>> {