Optimize updates in NEProfileRepository (#742)

Currently, NEProfileRepository decodes profiles from ALL NE managers on
any update. This is undesirable considering that:

- Profiles are only _added_ by the app
- Externally, profiles can only be _removed_

Therefore:

- Observe the initial managers to decode the initial profiles from them
- Publish values manually on save/delete (to ProfileManager eventually)
- Observe the subsequent updates for when a profile is removed
externally, i.e. its ID doesn't appear in managers

Fixes #741

Passepartout.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -41,7 +41,7 @@
       "kind" : "remoteSourceControl",
       "location" : "git@github.com:passepartoutvpn/passepartoutkit-source",
       "state" : {
-        "revision" : "9a43e23e9134c3e93926271b2d630be607433fa0"
+        "revision" : "ead8d1652fc6875f8865a1c8610b0cc35828dee6"
       }
     },
     {

Passepartout/Library/Package.swift

@@ -28,7 +28,7 @@ let package = Package(
     ],
     dependencies: [
 //        .package(url: "git@github.com:passepartoutvpn/passepartoutkit-source", from: "0.9.0"),
-        .package(url: "git@github.com:passepartoutvpn/passepartoutkit-source", revision: "9a43e23e9134c3e93926271b2d630be607433fa0"),
+        .package(url: "git@github.com:passepartoutvpn/passepartoutkit-source", revision: "ead8d1652fc6875f8865a1c8610b0cc35828dee6"),
 //        .package(path: "../../../passepartoutkit-source"),
         .package(url: "git@github.com:passepartoutvpn/passepartoutkit-source-openvpn-openssl", from: "0.9.1"),
 //        .package(url: "git@github.com:passepartoutvpn/passepartoutkit-source-openvpn-openssl", revision: "031863a1cd683962a7dfe68e20b91fa820a1ecce"),

Passepartout/Library/Sources/AppLibrary/Business/NEProfileRepository.swift

@@ -26,6 +26,7 @@
 import Combine
 import CommonLibrary
 import Foundation
+import NetworkExtension
 import PassepartoutKit
 
 public final class NEProfileRepository: ProfileRepository {
@@ -35,26 +36,29 @@ public final class NEProfileRepository: ProfileRepository {
 
     private let profilesSubject: CurrentValueSubject<[Profile], Never>
 
-    private var subscription: AnyCancellable?
+    private var subscriptions: Set<AnyCancellable>
 
     public init(repository: NETunnelManagerRepository, title: @escaping (Profile) -> String) {
         self.repository = repository
         self.title = title
         profilesSubject = CurrentValueSubject([])
+        subscriptions = []
 
-        subscription = repository
+        repository
             .managersPublisher
-            .sink { [weak self] allManagers in
-                let profiles = allManagers.values.compactMap {
-                    do {
-                        return try repository.profile(from: $0)
-                    } catch {
-                        pp_log(.app, .error, "Unable to decode profile from NE manager '\($0.localizedDescription ?? "")': \(error)")
-                        return nil
+            .first()
+            .sink { [weak self] in
+                self?.onLoadedManagers($0)
             }
+            .store(in: &subscriptions)
+
+        repository
+            .managersPublisher
+            .dropFirst()
+            .sink { [weak self] in
+                self?.onUpdatedManagers($0)
             }
-                self?.profilesSubject.send(profiles)
-            }
+            .store(in: &subscriptions)
     }
 
     public var profilesPublisher: AnyPublisher<[Profile], Never> {
@@ -68,11 +72,58 @@ public final class NEProfileRepository: ProfileRepository {
 
     public func saveProfile(_ profile: Profile) async throws {
         try await repository.save(profile, connect: false, title: title)
+        if let index = profilesSubject.value.firstIndex(where: { $0.id == profile.id }) {
+            profilesSubject.value[index] = profile
+        } else {
+            profilesSubject.value.append(profile)
+        }
     }
 
     public func removeProfiles(withIds profileIds: [Profile.ID]) async throws {
+        var removedIds: Set<Profile.ID> = []
+        defer {
+            profilesSubject.value.removeAll {
+                removedIds.contains($0.id)
+            }
+        }
         for id in profileIds {
             try await repository.remove(profileId: id)
+            removedIds.insert(id)
         }
     }
 }
+
+private extension NEProfileRepository {
+    func onLoadedManagers(_ managers: [Profile.ID: NETunnelProviderManager]) {
+        let profiles = managers.values.compactMap {
+            do {
+                return try repository.profile(from: $0)
+            } catch {
+                pp_log(.app, .error, "Unable to decode profile from NE manager '\($0.localizedDescription ?? "")': \(error)")
+                return nil
+            }
+        }
+        profilesSubject.send(profiles)
+    }
+
+    func onUpdatedManagers(_ managers: [Profile.ID: NETunnelProviderManager]) {
+        let profiles = profilesSubject
+            .value
+            .filter {
+                managers.keys.contains($0.id)
+            }
+
+        let removedProfilesDesc = profilesSubject
+            .value
+            .filter {
+                !managers.keys.contains($0.id)
+            }
+            .map {
+                "\($0.name)(\($0.id)"
+            }
+
+        pp_log(.app, .info, "Sync profiles removed externally: \(removedProfilesDesc)")
+
+        profilesSubject.send(profiles)
+    }
+}