Move basic views

Author: pblazej

Sources/LiveKitComponents/UI/Buttons/AsyncButton.swift

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2025 LiveKit
+ *
+ * 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 SwiftUI
+
+/// A drop-in replacement `Button` that executes an async action and shows a busy label when in progress.
+///
+/// - Parameters:
+///   - action: The async action to execute.
+///   - label: The label to show when not busy.
+///   - busyLabel: The label to show when busy. Defaults to an empty view.
+public struct AsyncButton<Label: View, BusyLabel: View>: View {
+    private let action: () async -> Void
+
+    @ViewBuilder private let label: Label
+    @ViewBuilder private let busyLabel: BusyLabel
+
+    @State private var isBusy = false
+
+    public init(
+        action: @escaping () async -> Void,
+        @ViewBuilder label: () -> Label,
+        @ViewBuilder busyLabel: () -> BusyLabel = EmptyView.init
+    ) {
+        self.action = action
+        self.label = label()
+        self.busyLabel = busyLabel()
+    }
+
+    public var body: some View {
+        Button {
+            isBusy = true
+            Task {
+                await action()
+                isBusy = false
+            }
+        } label: {
+            if isBusy {
+                if busyLabel is EmptyView {
+                    label
+                } else {
+                    busyLabel
+                }
+            } else {
+                label
+            }
+        }
+        .disabled(isBusy)
+    }
+}

Sources/LiveKitComponents/UI/Chat/ChatScrollView.swift

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2025 LiveKit
+ *
+ * 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 LiveKit
+import SwiftUI
+
+public struct ChatScrollView<Content: View>: View {
+    public typealias MessageBuilder = (ReceivedMessage) -> Content
+
+    @LKConversation private var conversation
+    @ViewBuilder private let messageBuilder: MessageBuilder
+
+    public init(messageBuilder: @escaping MessageBuilder) {
+        self.messageBuilder = messageBuilder
+    }
+
+    public var body: some View {
+        ScrollViewReader { scrollView in
+            ScrollView {
+                LazyVStack {
+                    ForEach(conversation.messages.values.reversed()) { message in
+                        messageBuilder(message)
+                            .upsideDown()
+                            .id(message.id)
+                    }
+                }
+            }
+            .onChange(of: conversation.messages.count) { _ in
+                scrollView.scrollTo(conversation.messages.keys.last)
+            }
+            .upsideDown()
+            .animation(.default, value: conversation.messages)
+        }
+    }
+}
+
+private struct UpsideDown: ViewModifier {
+    func body(content: Content) -> some View {
+        content
+            .rotationEffect(.radians(Double.pi))
+            .scaleEffect(x: -1, y: 1, anchor: .center)
+    }
+}
+
+private extension View {
+    func upsideDown() -> some View {
+        modifier(UpsideDown())
+    }
+}

Sources/LiveKitComponents/UI/Visualizer/BarAudioVisualizer.swift

@@ -108,6 +108,17 @@ public struct BarAudioVisualizer: View {
         animationProperties = PhaseAnimationProperties(barCount: barCount)
     }
 
+    public init(agent: Agent?,
+                barColor: Color = .primary,
+                barCount: Int = 5,
+                barCornerRadius: CGFloat = 100,
+                barSpacingFactor: CGFloat = 0.015,
+                barMinOpacity: CGFloat = 0.16,
+                isCentered: Bool = true)
+    {
+        self.init(audioTrack: agent?.audioTrack, agentState: agent?.state ?? .listening, barColor: barColor, barCount: barCount, barCornerRadius: barCornerRadius, barSpacingFactor: barSpacingFactor, barMinOpacity: barMinOpacity, isCentered: isCentered)
+    }
+
     public var body: some View {
         GeometryReader { geometry in
             let highlightingSequence = animationProperties.highlightingSequence(agentState: agentState)