fix: no whitespace allowed in file renaming - WPB-21698

WireMessaging/Sources/WireMessagingUI/WireCells/Components/Files/FileRenameViewModel.swift

@@ -95,6 +95,10 @@ final class FileRenameViewModel: ObservableObject {
         }
     }
 
+    private var trimmedInput: String {
+        filenameInput.trimmingCharacters(in: .whitespacesAndNewlines)
+    }
+
     init(
         renameNodeUseCase: any WireCellsRenameNodeUseCaseProtocol,
         model: Model,
@@ -119,7 +123,7 @@ final class FileRenameViewModel: ObservableObject {
             try await renameNodeUseCase.invoke(
                 nodeID: nodeID,
                 nodeFilepath: nodeFilePath,
-                newFilename: filenameInput,
+                newFilename: trimmedInput,
                 isFolder: kind == .folder
             )
 
@@ -149,8 +153,8 @@ final class FileRenameViewModel: ObservableObject {
 
     private func bindTextInput() {
         $filenameInput
-            .compactMap { [weak self] input in
-                self?.filenameValidator.validate(input)
+            .compactMap { [weak self] _ in
+                self?.filenameValidator.validate(self?.trimmedInput ?? "")
             }
             .flatMap(\.self)
             .sink { [weak self] result in

WireMessaging/Sources/WireMessagingUI/WireCells/Components/Files/FilenameValidator.swift

@@ -32,7 +32,7 @@ struct FilenameValidator {
     }
 
     func validate(_ input: String) -> AnyPublisher<Result<Void, Failure>, Never> {
-        let result: Result<Void, Failure> = if input.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty {
+        let result: Result<Void, Failure> = if input.isEmpty {
             .failure(.empty)
         } else if input.hasPrefix(".") {
             .failure(.dotPrefix)

WireMessaging/Tests/WireMessagingTests/WireCells/UITests/Components/Files/FilenameValidatorTests.swift

@@ -0,0 +1,100 @@
+//
+// Wire
+// Copyright (C) 2026 Wire Swiss GmbH
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see http://www.gnu.org/licenses/.
+//
+
+import Foundation
+import Testing
+
+@testable import WireMessagingUI
+
+@MainActor
+final class FilenameValidatorTests {
+    private let sut: FilenameValidator
+
+    init() {
+        self.sut = FilenameValidator()
+    }
+
+    @Test
+    func `When input is valid it succeeds`() async {
+        // given
+        let input = "filename"
+
+        // when
+        var iterator = sut.validate(input).values.makeAsyncIterator()
+        let result = await iterator.next()!
+
+        // then
+        #expect((try? result.get()) != nil)
+    }
+
+    @Test
+    func `When input is too long it throws error`() async {
+        // given
+        let input = Array(repeating: "t", count: 65).joined()
+
+        // then
+        await #expect(throws: FilenameValidator.Failure.tooLong) {
+            // when
+            var iterator = sut.validate(input).values.makeAsyncIterator()
+            let result = await iterator.next()!
+            try result.get()
+        }
+    }
+
+    @Test
+    func `When input has dot prefix it throws error`() async {
+        // given
+        let input = ".filename"
+
+        // then
+        await #expect(throws: FilenameValidator.Failure.dotPrefix) {
+            // when
+            var iterator = sut.validate(input).values.makeAsyncIterator()
+            let result = await iterator.next()!
+            try result.get()
+        }
+    }
+
+    @Test
+    func `When input has slash character it throws error`() async {
+        // given
+        let input = "filename/"
+
+        // then
+        await #expect(throws: FilenameValidator.Failure.slashCharacter) {
+            // when
+            var iterator = sut.validate(input).values.makeAsyncIterator()
+            let result = await iterator.next()!
+            try result.get()
+        }
+    }
+
+    @Test
+    func `When input is empty it throws error`() async {
+        // given
+        let input = ""
+
+        // then
+        await #expect(throws: FilenameValidator.Failure.empty) {
+            // when
+            var iterator = sut.validate(input).values.makeAsyncIterator()
+            let result = await iterator.next()!
+            try result.get()
+        }
+    }
+}