Added errors for desktop plugins

Author: Choochmeque

src/error.rs

@@ -2,13 +2,60 @@ use serde::{ser::Serializer, Serialize};
 
 pub type Result<T> = std::result::Result<T, Error>;
 
+/// Replica of the tauri::plugin::mobile::ErrorResponse for desktop platforms.
+#[cfg(desktop)]
+#[derive(Debug, thiserror::Error, Clone, serde::Deserialize)]
+pub struct ErrorResponse<T = ()> {
+    /// Error code.
+    pub code: Option<String>,
+    /// Error message.
+    pub message: Option<String>,
+    /// Optional error data.
+    #[serde(flatten)]
+    pub data: T,
+}
+
+#[cfg(desktop)]
+impl<T> std::fmt::Display for ErrorResponse<T> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        if let Some(code) = &self.code {
+            write!(f, "[{code}]")?;
+            if self.message.is_some() {
+                write!(f, " - ")?;
+            }
+        }
+        if let Some(message) = &self.message {
+            write!(f, "{message}")?;
+        }
+        Ok(())
+    }
+}
+
+/// Replica of the tauri::plugin::mobile::PluginInvokeError for desktop platforms.
+#[cfg(desktop)]
+#[derive(Debug, thiserror::Error)]
+pub enum PluginInvokeError {
+    /// Error returned from direct desktop plugin.
+    #[error(transparent)]
+    InvokeRejected(#[from] ErrorResponse),
+    /// Failed to deserialize response.
+    #[error("failed to deserialize response: {0}")]
+    CannotDeserializeResponse(serde_json::Error),
+    /// Failed to serialize request payload.
+    #[error("failed to serialize payload: {0}")]
+    CannotSerializePayload(serde_json::Error),
+}
+
 #[derive(Debug, thiserror::Error)]
 pub enum Error {
     #[error(transparent)]
     Io(#[from] std::io::Error),
     #[cfg(mobile)]
     #[error(transparent)]
     PluginInvoke(#[from] tauri::plugin::mobile::PluginInvokeError),
+    #[cfg(desktop)]
+    #[error(transparent)]
+    PluginInvoke(#[from] crate::error::PluginInvokeError),
 }
 
 impl Serialize for Error {