Finish extraction

- Moves SwiftUI code out of Riot and into RiotSwiftUI which has no dependency on Matrix SDK.
- Git wasn't smart enough to see the file moves. Most feature function has remain unchanged. 1 change I did make was remove NotificationSettingsViewModel's dependence on MxPushRule, so that the view model could be moved into RiotSwiftUI.
- Add LocaleProvider to abstract VectorL10n's use of Matrix SDK language so it can be used in RiotSwiftUI.
- Split Theme into UKit/SwiftUI version to remove RiotSwiftUI's dependence on ThemeService and ThemeV1.
- Migrated from ThemeObserver to ThemePublisher. We push updates to ThemePublisher so that we can remove ThemeService as dependency.
- Add .DS_Store to .gitignore

RiotSwiftUI/Modules/Common/Theme/ThemeIdentifierExtensions.swift

@@ -0,0 +1,35 @@
+// 
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+import DesignKit
+
+/**
+ Extension to `ThemeIdentifier` for getting the SwiftUI theme.
+ */
+@available(iOS 14.0, *)
+extension ThemeIdentifier {
+    fileprivate static let defaultTheme = DefaultThemeSwiftUI()
+    fileprivate static let darkTheme = DarkThemeSwiftUI()
+    public var themeSwiftUI: ThemeSwiftUI {
+        switch self {
+        case .light:
+            return Self.defaultTheme
+        case .dark, .black:
+            return Self.darkTheme
+        }
+    }
+}

RiotSwiftUI/Modules/Common/Theme/ThemeKey.swift

@@ -0,0 +1,56 @@
+// 
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+import SwiftUI
+import DesignKit
+
+@available(iOS 14.0, *)
+private struct ThemeKey: EnvironmentKey {
+    static let defaultValue = ThemePublisher.shared.theme
+}
+
+@available(iOS 14.0, *)
+extension EnvironmentValues {
+  var theme: ThemeSwiftUI {
+    get { self[ThemeKey.self] }
+    set { self[ThemeKey.self] = newValue }
+  }
+}
+
+/**
+ A theme modifier for setting the theme for this view and all its descendants in the hierarchy.
+ - Parameters:
+  - theme: a Theme to be set as the environment value.
+ */
+@available(iOS 14.0, *)
+extension View {
+  func theme(_ theme: ThemeSwiftUI) -> some View {
+    environment(\.theme, theme)
+  }
+}
+
+/**
+ A theme modifier for setting the theme by id for this view and all its descendants in the hierarchy.
+ - Parameters:
+  - themeId: ThemeIdentifier of a theme to be set as the environment value.
+ */
+@available(iOS 14.0, *)
+extension View {
+  func theme(_ themeId: ThemeIdentifier) -> some View {
+    return environment(\.theme, themeId.themeSwiftUI)
+  }
+}

RiotSwiftUI/Modules/Common/Theme/ThemePublisher.swift

@@ -0,0 +1,51 @@
+// 
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+import Combine
+
+/**
+ Provides the theme and theme updates to SwiftUI.
+ Replaces the old ThemeObserver. Riot app can push updates to this class
+ removing the dependency of this calss on the `ThemeService`.
+ */
+@available(iOS 14.0, *)
+class ThemePublisher: ObservableObject {
+    
+    private static var _shared: ThemePublisher? = nil
+    static var shared: ThemePublisher {
+            if _shared == nil {
+                configure(themeId: .light)
+            }
+            return _shared!
+    }
+    
+    @Published private(set) var theme: ThemeSwiftUI
+    
+    static func configure(themeId: ThemeIdentifier) {
+        _shared = ThemePublisher(themeId: .light)
+    }
+    
+    init(themeId: ThemeIdentifier) {
+        _theme = Published.init(initialValue: themeId.themeSwiftUI)
+    }
+
+    func republish(themeIdPublisher: AnyPublisher<ThemeIdentifier, Never>) {
+        themeIdPublisher
+            .map(\.themeSwiftUI)
+            .assign(to: &$theme)
+    }
+}

RiotSwiftUI/Modules/Common/Theme/ThemeSwiftUI.swift

@@ -0,0 +1,23 @@
+// 
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+import DesignKit
+
+@available(iOS 14.0, *)
+protocol ThemeSwiftUI: ThemeSwiftUIType {
+    var identifier: ThemeIdentifier { get }
+}

RiotSwiftUI/Modules/Common/Theme/Themes/DarkThemeSwiftUI.swift

@@ -0,0 +1,25 @@
+// 
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+import DesignKit
+
+@available(iOS 14.0, *)
+struct DarkThemeSwiftUI: ThemeSwiftUI {
+    var identifier: ThemeIdentifier = .dark
+    var colors: ColorSwiftUI = DarkColors.swiftUI
+    var fonts: FontSwiftUI = FontSwiftUI(values: ElementFonts())
+}

RiotSwiftUI/Modules/Common/Theme/Themes/DefaultThemeSwiftUI.swift

@@ -0,0 +1,25 @@
+// 
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+import DesignKit
+
+@available(iOS 14.0, *)
+struct DefaultThemeSwiftUI: ThemeSwiftUI {
+    var identifier: ThemeIdentifier = .light
+    var colors: ColorSwiftUI = LightColors.swiftUI
+    var fonts: FontSwiftUI = FontSwiftUI(values: ElementFonts())
+}