More async in traits

src/calendar/cached_calendar.rs

@@ -57,11 +57,11 @@ impl PartialCalendar for CachedCalendar {
         self.supported_components
     }
 
-    fn add_item(&mut self, item: Item) {
+    async fn add_item(&mut self, item: Item) {
         self.items.insert(item.id().clone(), item);
     }
 
-    fn delete_item(&mut self, item_id: &ItemId) -> Result<(), Box<dyn Error>> {
+    async fn delete_item(&mut self, item_id: &ItemId) -> Result<(), Box<dyn Error>> {
         if let None = self.items.remove(item_id) {
             return Err("This key does not exist.".into());
         }
@@ -97,11 +97,11 @@ impl PartialCalendar for CachedCalendar {
         map
     }
 
-    fn get_item_ids(&mut self) -> HashSet<ItemId> {
+    async fn get_item_ids(&mut self) -> HashSet<ItemId> {
         self.items.keys().cloned().collect()
     }
 
-    fn get_item_by_id_mut(&mut self, id: &ItemId) -> Option<&mut Item> {
+    async fn get_item_by_id_mut<'a>(&'a mut self, id: &ItemId) -> Option<&'a mut Item> {
         self.items.get_mut(id)
     }
 }

src/calendar/remote_calendar.rs

@@ -44,24 +44,24 @@ impl PartialCalendar for RemoteCalendar {
     }
 
     /// Get the IDs of all current items in this calendar
-    fn get_item_ids(&mut self) -> HashSet<ItemId> {
+    async fn get_item_ids(&mut self) -> HashSet<ItemId> {
         log::error!("Not implemented");
         HashSet::new()
     }
 
     /// Returns a particular item
-    fn get_item_by_id_mut(&mut self, _id: &ItemId) -> Option<&mut Item> {
+    async fn get_item_by_id_mut<'a>(&'a mut self, _id: &ItemId) -> Option<&'a mut Item> {
         log::error!("Not implemented");
         None
     }
 
     /// Add an item into this calendar
-    fn add_item(&mut self, _item: Item) {
+    async fn add_item(&mut self, _item: Item) {
         log::error!("Not implemented");
     }
 
     /// Remove an item from this calendar
-    fn delete_item(&mut self, _item_id: &ItemId) -> Result<(), Box<dyn Error>> {
+    async fn delete_item(&mut self, _item_id: &ItemId) -> Result<(), Box<dyn Error>> {
         log::error!("Not implemented");
         Ok(())
     }

src/provider.rs

@@ -19,7 +19,7 @@ where
     L: CalDavSource<T> + SyncSlave,
     T: CompleteCalendar,
     S: CalDavSource<U>,
-    U: PartialCalendar,
+    U: PartialCalendar + Sync + Send,
 {
     /// The remote server
     server: S,
@@ -35,7 +35,7 @@ where
     L: CalDavSource<T> + SyncSlave,
     T: CompleteCalendar,
     S: CalDavSource<U>,
-    U: PartialCalendar,
+    U: PartialCalendar + Sync + Send,
 {
     /// Create a provider.
     ///
@@ -83,10 +83,10 @@ where
                 Some(date) => cal_local.get_items_deleted_since(date).await,
             };
             if last_sync.is_some() {
-                let server_deletions = cal_server.find_deletions_from(cal_local.get_item_ids());
+                let server_deletions = cal_server.find_deletions_from(cal_local.get_item_ids().await).await;
                 for server_del_id in server_deletions {
                     // Even in case of conflicts, "the server always wins", so it is safe to remove tasks from the local cache as soon as now
-                    if let Err(err) = cal_local.delete_item(&server_del_id) {
+                    if let Err(err) = cal_local.delete_item(&server_del_id).await {
                         log::error!("Unable to remove local item {}: {}", server_del_id, err);
                     }
 
@@ -118,7 +118,7 @@ where
 
             // ...upload local deletions,...
             for local_del_id in local_dels {
-                if let Err(err) = cal_server.delete_item(&local_del_id) {
+                if let Err(err) = cal_server.delete_item(&local_del_id).await {
                     log::error!("Unable to remove remote item {}: {}", local_del_id, err);
                 }
             }
@@ -126,15 +126,15 @@ where
             // ...and upload local changes
             for (local_mod_id, local_mod) in local_mods {
                 // Conflicts are no longer in local_mods
-                if let Err(err) = cal_server.delete_item(&local_mod_id) {
+                if let Err(err) = cal_server.delete_item(&local_mod_id).await {
                     log::error!("Unable to remove remote item (before an update) {}: {}", local_mod_id, err);
                 }
                 // TODO: should I add a .update_item()?
-                cal_server.add_item(local_mod.clone());
+                cal_server.add_item(local_mod.clone()).await;
             }
 
-            remove_from_calendar(&conflicting_tasks, &mut (*cal_local));
-            move_to_calendar(&mut tasks_to_add, &mut (*cal_local));
+            remove_from_calendar(&conflicting_tasks, &mut (*cal_local)).await;
+            move_to_calendar(&mut tasks_to_add, &mut (*cal_local)).await;
         }
 
         self.local.update_last_sync(None);
@@ -144,18 +144,18 @@ where
 }
 
 
-fn move_to_calendar<C: PartialCalendar>(items: &mut Vec<Item>, calendar: &mut C) {
+async fn move_to_calendar<C: PartialCalendar>(items: &mut Vec<Item>, calendar: &mut C) {
     while items.len() > 0 {
         let item = items.remove(0);
         log::warn!("Moving {} to calendar", item.name());
-        calendar.add_item(item);
+        calendar.add_item(item).await;
     }
 }
 
-fn remove_from_calendar<C: PartialCalendar>(ids: &Vec<ItemId>, calendar: &mut C) {
+async fn remove_from_calendar<C: PartialCalendar>(ids: &Vec<ItemId>, calendar: &mut C) {
     for id in ids {
         log::info!("  Removing {:?} from calendar", id);
-        if let Err(err) = calendar.delete_item(id) {
+        if let Err(err) = calendar.delete_item(id).await {
             log::warn!("Unable to delete item {:?} from calendar: {}", id, err);
         }
     }

src/traits.rs

@@ -45,16 +45,16 @@ pub trait PartialCalendar {
         -> HashMap<ItemId, &Item>;
 
     /// Get the IDs of all current items in this calendar
-    fn get_item_ids(&mut self) -> HashSet<ItemId>;
+    async fn get_item_ids(&mut self) -> HashSet<ItemId>;
 
     /// Returns a particular item
-    fn get_item_by_id_mut(&mut self, id: &ItemId) -> Option<&mut Item>;
+    async fn get_item_by_id_mut<'a>(&'a mut self, id: &ItemId) -> Option<&'a mut Item>;
 
     /// Add an item into this calendar
-    fn add_item(&mut self, item: Item);
+    async fn add_item(&mut self, item: Item);
 
     /// Remove an item from this calendar
-    fn delete_item(&mut self, item_id: &ItemId) -> Result<(), Box<dyn Error>>;
+    async fn delete_item(&mut self, item_id: &ItemId) -> Result<(), Box<dyn Error>>;
 
 
     /// Returns whether this calDAV calendar supports to-do items
@@ -68,8 +68,8 @@ pub trait PartialCalendar {
     }
 
     /// Finds the IDs of the items that are missing compared to a reference set
-    fn find_deletions_from(&mut self, reference_set: HashSet<ItemId>) -> HashSet<ItemId> {
-        let current_items = self.get_item_ids();
+    async fn find_deletions_from(&mut self, reference_set: HashSet<ItemId>) -> HashSet<ItemId> {
+        let current_items = self.get_item_ids().await;
         reference_set.difference(&current_items).map(|id| id.clone()).collect()
     }
 }