Post status deleted notifications when load fails with not found

Tusker/API/FetchStatusService.swift

@@ -36,7 +36,24 @@ class FetchStatusService {
     }
     
     private func handleStatusNotFound() {
-        // todo: remove from persistent store, send notifications
+        // todo: what about when browsing on another instance?
+        guard let accountID = mastodonController.accountInfo?.id else {
+            return
+        }
+        
+        var reblogIDs = [String]()
+        if let cached = mastodonController.persistentContainer.status(for: statusID) {
+            let reblogsReq = StatusMO.fetchRequest()
+            reblogsReq.predicate = NSPredicate(format: "reblog = %@", cached)
+            if let reblogs = try? mastodonController.persistentContainer.viewContext.fetch(reblogsReq) {
+                reblogIDs = reblogs.map(\.id)
+            }
+        }
+        
+        NotificationCenter.default.post(name: .statusDeleted, object: nil, userInfo: [
+            "accountID": accountID,
+            "statusIDs": [statusID] + reblogIDs
+        ])
     }
     
     enum Result {