Decouple core Yaak logic from Tauri (#354)

crates/yaak-sync/src/error.rs

@@ -0,0 +1,44 @@
+use serde::{Serialize, Serializer};
+use std::io;
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum Error {
+    #[error("Yaml error: {0}")]
+    YamlParseError(#[from] serde_yaml::Error),
+
+    #[error("Sync parse error: {0}")]
+    ParseError(String),
+
+    #[error(transparent)]
+    ModelError(#[from] yaak_models::error::Error),
+
+    #[error("Unknown model: {0}")]
+    UnknownModel(String),
+
+    #[error("I/o error: {0}")]
+    IoError(#[from] io::Error),
+
+    #[error("JSON error: {0}")]
+    JsonParseError(#[from] serde_json::Error),
+
+    #[error("Invalid sync file: {0}")]
+    InvalidSyncFile(String),
+
+    #[error("Invalid sync directory: {0}")]
+    InvalidSyncDirectory(String),
+
+    #[error("Watch error: {0}")]
+    NotifyError(#[from] notify::Error),
+}
+
+impl Serialize for Error {
+    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_str(self.to_string().as_ref())
+    }
+}
+
+pub type Result<T> = std::result::Result<T, Error>;