Started wofi selection

src/util.rs

@@ -1,3 +1,6 @@
+use std::io::Write;
+use std::process as proc;
+
 pub fn is_debug() -> bool {
     true
 }
@@ -5,3 +8,46 @@ pub fn is_debug() -> bool {
 pub fn get_swayr_socket_path() -> String {
     format!("/run/user/{}/swayr-sock", users::get_current_uid())
 }
+
+pub fn wofi_select<'a, 'b, TS>(prompt: &'a str, choices: &'b Vec<TS>) -> Option<&'b TS>
+where
+    TS: std::fmt::Display + Sized,
+{
+    let mut map: std::collections::HashMap<String, &TS> = std::collections::HashMap::new();
+    for c in choices.iter() {
+        map.insert(format!("{}", c), c);
+    }
+
+    let mut wofi = proc::Command::new("wofi")
+        .arg("--show=dmenu")
+        .arg("--prompt")
+        .arg(prompt)
+        .stdin(proc::Stdio::piped())
+        .stdout(proc::Stdio::piped())
+        .spawn()
+        .expect("Error running wofi!");
+
+    {
+        let stdin = wofi.stdin.as_mut().expect("Failed to open wofi stdin");
+        for k in map.keys() {
+            stdin
+                .write_all(format!("{}\n", k).as_bytes())
+                .expect("Failed to write to wofi stdin");
+        }
+    }
+
+    let output = wofi.wait_with_output().expect("Failed to read stdout");
+    let choice = String::from_utf8_lossy(&output.stdout);
+    // FIXME: Remove trailing \n from choice.
+    //println!("choice: {:?}", choice);
+    map.get(&*choice).copied()
+}
+
+#[test]
+fn test_wofi_select() {
+    let choices = vec!["a", "b", "c"];
+    let choice = wofi_select("Choose wisely", &choices);
+    println!("choice: {:?}", choice);
+    assert!(choice.is_some());
+    assert!(choices.contains(choice.unwrap()));
+}