fix(tui): removed a ton of use_username_dirs references

feat(tui): username is now appended to download_dir before passed as parameter
fix(tui): username is sanitized before appended to path

soulseek-rs/src/ui/utils.rs

@@ -72,6 +72,41 @@ pub const fn get_spinner_char(state: usize) -> &'static str {
     SPINNER_CHARS[state % SPINNER_CHARS.len()]
 }
 
+#[must_use]
+pub fn sanitize_path_component(name: &str) -> String {
+    let mut out = name
+        .chars()
+        .map(|c| match c {
+            '/' | '\\' | ':' | '*' | '?' | '"' | '<' | '>' | '|' => '_',
+            c if c.is_control() => '_',
+            c => c,
+        })
+        .collect::<String>();
+    if out.is_empty() || out.ends_with(['.', ' ']) {
+        out.push('_');
+    }
+    if is_reserved(out.as_str()) {
+        out.insert(0, '_');
+    }
+    out
+}
+
+#[cfg(target_os = "windows")]
+fn is_reserved(name: &str) -> bool {
+    let stem = name.split('.').next().unwrap_or(name).to_ascii_uppercase();
+    if matches!(stem.as_str(), "CON" | "PRN" | "AUX" | "NUL") {
+        true
+    } else {
+        matches!(stem.get(..3), Some("COM" | "LPT"))
+            && matches!(stem.as_bytes().get(3..), Some([b'1'..=b'9']))
+    }
+}
+
+#[cfg(not(target_os = "windows"))]
+fn is_reserved(name: &str) -> bool {
+    false
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;