Add user search for dm chats (#739)

* Add searchUsers in ClientProxy

* Add UserSearchProtocol

* Delete UserSearch file

* Add search

* Refine StartChatScreen

* Improve StartChatViewModel

* Add localizations

* Fix no result style

* Update localizations

* Add UTs

* Add UI tests

* Cleanup

* Refine tests

* Add changelog.d file

* Naming refactor

* Refactor ClientProxyProtocol api

* Fix typo

* Add mark

* Rename tests

* Update Dangerfile

* Improve UI test code

* Refactor search api

* Improve style

* Improve combine chain

* Add comment

* Improve StartChatScreen

* Improve updateState

* Add extension Published.Publisher

* Improve UI tests

* Remove Combine import

* Cleanup

* Remove “proxy” wording

* Delete extra extensions

* Refactor Publisher api

ElementX/Sources/Services/Client/ClientProxy.swift

@@ -248,6 +248,16 @@ class ClientProxy: ClientProxyProtocol {
         }
     }
     
+    func searchUsers(searchTerm: String, limit: UInt) async -> Result<SearchUsersResults, ClientProxyError> {
+        await Task.dispatch(on: clientQueue) {
+            do {
+                return try .success(.init(sdkResults: self.client.searchUsers(searchTerm: searchTerm, limit: UInt64(limit))))
+            } catch {
+                return .failure(.failedSearchingUsers)
+            }
+        }
+    }
+    
     // MARK: Private
 
     private func loadUserAvatarURLFromCache() {

ElementX/Sources/Services/Client/ClientProxyProtocol.swift

@@ -31,6 +31,7 @@ enum ClientProxyError: Error {
     case failedSettingAccountData
     case failedRetrievingSessionVerificationController
     case failedLoadingMedia
+    case failedSearchingUsers
 }
 
 enum SlidingSyncConstants {
@@ -91,4 +92,6 @@ protocol ClientProxyProtocol: AnyObject, MediaLoaderProtocol {
     func logout() async
 
     func setPusher(with configuration: PusherConfiguration) async throws
+    
+    func searchUsers(searchTerm: String, limit: UInt) async -> Result<SearchUsersResults, ClientProxyError>
 }

ElementX/Sources/Services/Client/MockClientProxy.swift

@@ -110,4 +110,9 @@ class MockClientProxy: ClientProxyProtocol {
         setPusherCalled = true
         setPusherArgument = configuration
     }
+    
+    var searchUsersResult: Result<SearchUsersResults, ClientProxyError> = .success(.init(results: [], limited: false))
+    func searchUsers(searchTerm: String, limit: UInt) async -> Result<SearchUsersResults, ClientProxyError> {
+        searchUsersResult
+    }
 }

ElementX/Sources/Services/Users/UserProfile.swift

@@ -17,20 +17,32 @@
 import Foundation
 import MatrixRustSDK
 
-struct UserProfileProxy {
+struct UserProfile {
     let userID: String
     let displayName: String?
     let avatarURL: URL?
     
-    init(userID: String, displayName: String?, avatarURL: URL?) {
+    init(userID: String, displayName: String? = nil, avatarURL: URL? = nil) {
         self.userID = userID
         self.displayName = displayName
         self.avatarURL = avatarURL
     }
     
-    init(userProfile: UserProfile) {
-        userID = userProfile.userId
-        displayName = userProfile.displayName
-        avatarURL = userProfile.avatarUrl.flatMap(URL.init(string:))
+    init(sdkUserProfile: MatrixRustSDK.UserProfile) {
+        userID = sdkUserProfile.userId
+        displayName = sdkUserProfile.displayName
+        avatarURL = sdkUserProfile.avatarUrl.flatMap(URL.init(string:))
+    }
+}
+
+struct SearchUsersResults {
+    let results: [UserProfile]
+    let limited: Bool
+}
+
+extension SearchUsersResults {
+    init(sdkResults: MatrixRustSDK.SearchUsersResults) {
+        results = sdkResults.results.map(UserProfile.init)
+        limited = sdkResults.limited
     }
 }