Messenger example - send auth request

• Refactor user search
• Add contact feature
• Save found contacts
• Add send request feature
• Send auth request
• Fix saving my contact during registration

Examples/xx-messenger/Sources/UserSearchFeature/UserSearchResultFeature.swift

-import AppCore
 import ComposableArchitecture
 import Foundation
 import XCTestDynamicOverlay
 import XXClient
-import XXModels
 
 public struct UserSearchResultState: Equatable, Identifiable {
   public init(
     id: Data,
     xxContact: XXClient.Contact,
-    dbContact: XXModels.Contact? = nil,
     username: String? = nil,
     email: String? = nil,
     phone: String? = nil
   ) {
     self.id = id
     self.xxContact = xxContact
-    self.dbContact = dbContact
     self.username = username
     self.email = email
     self.phone = phone
@@ -24,7 +20,6 @@ public struct UserSearchResultState: Equatable, Identifiable {
 
   public var id: Data
   public var xxContact: XXClient.Contact
-  public var dbContact: XXModels.Contact?
   public var username: String?
   public var email: String?
   public var phone: String?
@@ -32,60 +27,30 @@ public struct UserSearchResultState: Equatable, Identifiable {
 
 public enum UserSearchResultAction: Equatable {
   case start
-  case didUpdateContact(XXModels.Contact?)
-  case sendRequestButtonTapped
+  case tapped
 }
 
 public struct UserSearchResultEnvironment {
-  public init(
-    db: DBManagerGetDB,
-    mainQueue: AnySchedulerOf<DispatchQueue>,
-    bgQueue: AnySchedulerOf<DispatchQueue>
-  ) {
-    self.db = db
-    self.mainQueue = mainQueue
-    self.bgQueue = bgQueue
-  }
-
-  public var db: DBManagerGetDB
-  public var mainQueue: AnySchedulerOf<DispatchQueue>
-  public var bgQueue: AnySchedulerOf<DispatchQueue>
+  public init() {}
 }
 
 #if DEBUG
 extension UserSearchResultEnvironment {
-  public static let unimplemented = UserSearchResultEnvironment(
-    db: .unimplemented,
-    mainQueue: .unimplemented,
-    bgQueue: .unimplemented
-  )
+  public static let unimplemented = UserSearchResultEnvironment()
 }
 #endif
 
 public let userSearchResultReducer = Reducer<UserSearchResultState, UserSearchResultAction, UserSearchResultEnvironment>
 { state, action, env in
-  enum DBFetchEffectID {}
-
   switch action {
   case .start:
     let facts = (try? state.xxContact.getFacts()) ?? []
     state.username = facts.first(where: { $0.type == 0 })?.fact
     state.email = facts.first(where: { $0.type == 1 })?.fact
     state.phone = facts.first(where: { $0.type == 2 })?.fact
-    return try! env.db().fetchContactsPublisher(.init(id: [state.id]))
-      .assertNoFailure()
-      .map(\.first)
-      .map(UserSearchResultAction.didUpdateContact)
-      .subscribe(on: env.bgQueue)
-      .receive(on: env.mainQueue)
-      .eraseToEffect()
-      .cancellable(id: DBFetchEffectID.self, cancelInFlight: true)
-
-  case .didUpdateContact(let contact):
-    state.dbContact = contact
     return .none
 
-  case .sendRequestButtonTapped:
+  case .tapped:
     return .none
   }
 }