Fix a bug in the logic for when we should update the remote address book

file.

This would have caused new address book entries not to be written (after
the first remote store of the file).

Signed-off-by: Daira-Emma Hopwood <daira@jacaranda.org>

modules/Sources/Dependencies/AddressBookClient/AddressBookLiveKey.swift

@@ -165,7 +165,7 @@ extension AddressBookClient: DependencyKey {
         remoteStorage: RemoteStorageClient,
         storeAfterSync: Bool = true
     ) throws -> (contacts: AddressBookContacts, remoteStoreResult: RemoteStoreResult) {
-        // Ensure remote contacts are prepared
+        // Ensure remote contacts are prepared.
         var remoteContacts: AddressBookContacts = .empty
         var shouldUpdateRemote = false
         var cannotUpdateRemote = false
@@ -185,14 +185,16 @@ extension AddressBookClient: DependencyKey {
             throw error
         }
 
-        // Merge strategy
+        // We merge from the local contacts into the remote contacts, which
+        // makes it easy to see when the merged contacts have changed relative
+        // to the previous remote contacts.
         var syncedContacts = AddressBookContacts(
             lastUpdated: Date(),
             version: AddressBookContacts.Constants.version,
-            contacts: contacts.contacts
+            contacts: remoteContacts.contacts
         )
 
-        remoteContacts.contacts.forEach {
+        contacts.contacts.forEach {
             var notFound = true
 
             for i in 0..<syncedContacts.contacts.count {