feat: previous / next instructions

src/utils.rs

@@ -1,6 +1,16 @@
-use anyhow::anyhow;
+use std::process::Command;
+
+use anyhow::{anyhow, Result};
 use pulse::{context::introspect::SinkInputInfo, volume};
 
+#[link(name = "c")]
+extern "C" {
+    /// Gets the current user's ID
+    pub fn getuid() -> u32;
+}
+
+const NOTIFY_SEND_REPLACE_ID: u32 = 1448531;
+const NOTIFICATION_DURATION_MILLIS: u32 = 1000;
 const FULL_VOLUME: u32 = 1 << 16;
 
 pub fn volume_to_percentage(volume: volume::ChannelVolumes) -> u8 {
@@ -22,7 +32,38 @@ pub fn get_sink_input_name(sink_input: &SinkInputInfo) -> anyhow::Result<String>
         return Err(anyhow!("Invalid sink input name"));
     };
 
-    Ok(String::from_utf8(
+    Ok(capitalize_string(&String::from_utf8(
         name_bytes[..name_bytes.len() - 1].to_vec(),
-    )?)
+    )?))
+}
+
+fn capitalize_string(s: &str) -> String {
+    let mut c = s.chars();
+    match c.next() {
+        None => String::new(),
+        Some(f) => f.to_uppercase().collect::<String>() + c.as_str(),
+    }
+}
+
+pub fn send_notification(message: &str) -> Result<()> {
+    let user_id = unsafe { getuid() };
+
+    Command::new("notify-send")
+        .args(vec![
+            "Mixrs",
+            message,
+            "-t",
+            &NOTIFICATION_DURATION_MILLIS.to_string(),
+            "-r",
+            &NOTIFY_SEND_REPLACE_ID.to_string(),
+            "-i",
+            "/",
+        ])
+        .env(
+            "DBUS_SESSION_BUS_ADDRESS",
+            format!("unix:path=/run/user/{user_id}/bus"),
+        )
+        .spawn()?;
+
+    Ok(())
 }