Fix race condition causing My Profile tab bar image to not be set

Tusker/Screens/Compose/ComposeAutocompleteView.swift

@@ -143,9 +143,12 @@ struct ComposeAutocompleteMentionsView: View {
             
             localSearchWorkItem.cancel()
             
-            // if the query has changed, don't bother loading the now-outdated results
-            if case .mention(query) = uiState.autocompleteState {
-                self.loadAccounts(accounts.map { .pachyderm($0) }, query: query)
+            // dispatch back to the main thread because loadAccounts uses CoreData
+            DispatchQueue.main.async {
+                // if the query has changed, don't bother loading the now-outdated results
+                if case .mention(query) = uiState.autocompleteState {
+                    self.loadAccounts(accounts.map { .pachyderm($0) }, query: query)
+                }
             }
         }
     }
@@ -161,8 +164,20 @@ struct ComposeAutocompleteMentionsView: View {
                 return res
             }
             .filter(\.1.matched)
-            // todo: it would be nice to prioritize followee/follower accounts, but relationships aren't cached
-            .sorted { $0.1.score > $1.1.score }
+            .map { (account, res) -> (EitherAccount, Int) in
+                // give higher weight to accounts that the user follows or is followed by
+                var score = res.score
+                if let relationship = mastodonController.persistentContainer.relationship(forAccount: account.id) {
+                    if relationship.following {
+                        score += 3
+                    }
+                    if relationship.followedBy {
+                        score += 2
+                    }
+                }
+                return (account, score)
+            }
+            .sorted { $0.1 > $1.1 }
             .map(\.0)
     }
     

Tusker/Screens/Profile/MyProfileViewController.swift

@@ -7,6 +7,7 @@
 //
 
 import UIKit
+import Pachyderm
 
 class MyProfileViewController: ProfileViewController {
 
@@ -21,7 +22,7 @@ class MyProfileViewController: ProfileViewController {
             
             DispatchQueue.main.async {
                 self.accountID = account.id
-                self.setAvatarTabBarImage()
+                self.setAvatarTabBarImage(account: account)
             }
         }
     }
@@ -38,12 +39,7 @@ class MyProfileViewController: ProfileViewController {
         NotificationCenter.default.addObserver(self, selector: #selector(preferencesChanged), name: .preferencesChanged, object: nil)
     }
     
-    private func setAvatarTabBarImage() {
-        guard let id = mastodonController.account?.id,
-           let account = mastodonController.persistentContainer.account(for: id) else {
-            return
-        }
-        
+    private func setAvatarTabBarImage<Account: AccountProtocol>(account: Account) {
         _ = ImageCache.avatars.get(account.avatar, completion: { [weak self] (data) in
             guard let self = self, let data = data, let image = UIImage(data: data) else { return }
             DispatchQueue.main.async {
@@ -61,7 +57,12 @@ class MyProfileViewController: ProfileViewController {
     }
     
     @objc private func preferencesChanged() {
-        setAvatarTabBarImage()
+        guard let id = mastodonController.account?.id,
+           let account = mastodonController.persistentContainer.account(for: id) else {
+            return
+        }
+        
+        setAvatarTabBarImage(account: account)
     }
     
     // MARK: - Interaction