Try to implement slash bar functionality - part 1

rog-slash/src/error.rs

@@ -0,0 +1,39 @@
+use std::error::Error;
+use std::fmt;
+pub type Result<T> = std::result::Result<T, SlashError>;
+
+#[derive(Debug)]
+pub enum SlashError {
+    Dbus(String),
+    Udev(String, std::io::Error),
+    NoDevice,
+    UnsupportedDevice,
+    DataBufferLength,
+    ParseError(String),
+}
+
+impl fmt::Display for SlashError {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            SlashError::ParseError(e) => write!(f, "Could not parse {e}"),
+            SlashError::Dbus(detail) => write!(f, "{}", detail),
+            SlashError::Udev(deets, error) => write!(f, "udev {}: {}", deets, error),
+            SlashError::NoDevice => write!(f, "No Slash device found"),
+            SlashError::DataBufferLength => write!(
+                f,
+                "The data buffer was incorrect length for generating USB packets"
+            ),
+            SlashError::UnsupportedDevice => write!(f, "Unsupported Slash device found"),
+        }
+    }
+}
+
+impl Error for SlashError {}
+
+impl From<SlashError> for zbus::fdo::Error {
+    #[inline]
+    fn from(err: SlashError) -> Self {
+        zbus::fdo::Error::Failed(format!("{}", err))
+    }
+}