feat(indexeddb): add error type for communicating errors outside of module

Signed-off-by: Michael Goldenberg <[email protected]>

Author: mgoldenberg

crates/matrix-sdk-indexeddb/src/event_cache_store/builder.rs

@@ -20,8 +20,8 @@ use web_sys::DomException;
 
 use crate::{
     event_cache_store::{
-        migrations::open_and_upgrade_db, serializer::IndexeddbEventCacheStoreSerializer,
-        IndexeddbEventCacheStore,
+        error::IndexeddbEventCacheStoreError, migrations::open_and_upgrade_db,
+        serializer::IndexeddbEventCacheStoreSerializer, IndexeddbEventCacheStore,
     },
     serializer::IndexeddbSerializer,
 };
@@ -64,7 +64,7 @@ impl IndexeddbEventCacheStoreBuilder {
     /// Opens the IndexedDB database with the provided name. If successfully
     /// opened, builds the [`IndexeddbEventCacheStore`] with that database
     /// and the provided store cipher.
-    pub async fn build(self) -> Result<IndexeddbEventCacheStore, DomException> {
+    pub async fn build(self) -> Result<IndexeddbEventCacheStore, IndexeddbEventCacheStoreError> {
         Ok(IndexeddbEventCacheStore {
             inner: open_and_upgrade_db(&self.database_name).await?,
             serializer: IndexeddbEventCacheStoreSerializer::new(IndexeddbSerializer::new(

crates/matrix-sdk-indexeddb/src/event_cache_store/error.rs

@@ -13,6 +13,7 @@
 // limitations under the License
 
 use matrix_sdk_base::{SendOutsideWasm, SyncOutsideWasm};
+use thiserror::Error;
 
 /// A trait that combines the necessary traits needed for asynchronous runtimes,
 /// but excludes them when running in a web environment - i.e., when
@@ -21,3 +22,19 @@ pub trait AsyncErrorDeps: std::error::Error + SendOutsideWasm + SyncOutsideWasm
 
 impl<T> AsyncErrorDeps for T where T: std::error::Error + SendOutsideWasm + SyncOutsideWasm + 'static
 {}
+
+#[derive(Debug, Error)]
+pub enum IndexeddbEventCacheStoreError {
+    #[error("DomException {name} ({code}): {message}")]
+    DomException { name: String, message: String, code: u16 },
+}
+
+impl From<web_sys::DomException> for IndexeddbEventCacheStoreError {
+    fn from(value: web_sys::DomException) -> IndexeddbEventCacheStoreError {
+        IndexeddbEventCacheStoreError::DomException {
+            name: value.name(),
+            message: value.message(),
+            code: value.code(),
+        }
+    }
+}

crates/matrix-sdk-indexeddb/src/event_cache_store/mod.rs

@@ -28,6 +28,7 @@ mod transaction;
 mod types;
 
 pub use builder::IndexeddbEventCacheStoreBuilder;
+pub use error::IndexeddbEventCacheStoreError;
 
 /// A type for providing an IndexedDB implementation of [`EventCacheStore`][1].
 /// This is meant to be used as a backend to [`EventCacheStore`][1] in browser