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| 1 | +// Copyright 2021 Google LLC |
| 2 | +// |
| 3 | +// Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | +// you may not use this file except in compliance with the License. |
| 5 | +// You may obtain a copy of the License at |
| 6 | +// |
| 7 | +// http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | +// |
| 9 | +// Unless required by applicable law or agreed to in writing, software |
| 10 | +// distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | +// See the License for the specific language governing permissions and |
| 13 | +// limitations under the License. |
| 14 | + |
| 15 | +import FirebaseInAppMessaging |
| 16 | +import SwiftUI |
| 17 | + |
| 18 | +// MARK: Image-only messages. |
| 19 | + |
| 20 | +@available(iOS 13, tvOS 13, *) |
| 21 | +struct ImageOnlyInAppMessageDisplayViewModifier<DisplayMessage: View>: ViewModifier { |
| 22 | + var closure: (InAppMessagingImageOnlyDisplay, InAppMessagingDisplayDelegate) -> DisplayMessage |
| 23 | + @ObservedObject var delegateBridge = DelegateBridge.shared |
| 24 | + |
| 25 | + func body(content: Content) -> some View { |
| 26 | + return content.overlay(overlayView()) |
| 27 | + } |
| 28 | + |
| 29 | + @ViewBuilder |
| 30 | + func overlayView() -> some View { |
| 31 | + if let (message, delegate) = delegateBridge.inAppMessageData, |
| 32 | + let imageOnlyMessage = message as? InAppMessagingImageOnlyDisplay { |
| 33 | + closure(imageOnlyMessage, delegate) |
| 34 | + .onAppear { delegate.impressionDetected?(for: imageOnlyMessage) } |
| 35 | + } else { |
| 36 | + EmptyView() |
| 37 | + } |
| 38 | + } |
| 39 | +} |
| 40 | + |
| 41 | +@available(iOS 13, tvOS 13, *) |
| 42 | +public extension View { |
| 43 | + /// Overrides the default display of an image only in-app message as defined on the Firebase console. |
| 44 | + func imageOnlyInAppMessage<Content: View>(closure: @escaping (InAppMessagingImageOnlyDisplay, |
| 45 | + InAppMessagingDisplayDelegate) |
| 46 | + -> Content) |
| 47 | + -> some View { |
| 48 | + modifier(ImageOnlyInAppMessageDisplayViewModifier(closure: closure)) |
| 49 | + } |
| 50 | +} |
| 51 | + |
| 52 | +// MARK: Banner messages. |
| 53 | + |
| 54 | +@available(iOS 13, tvOS 13, *) |
| 55 | +struct BannerInAppMessageDisplayViewModifier<DisplayMessage: View>: ViewModifier { |
| 56 | + var closure: (InAppMessagingBannerDisplay, InAppMessagingDisplayDelegate) -> DisplayMessage |
| 57 | + @ObservedObject var delegateBridge = DelegateBridge.shared |
| 58 | + |
| 59 | + func body(content: Content) -> some View { |
| 60 | + return content.overlay(overlayView()) |
| 61 | + } |
| 62 | + |
| 63 | + @ViewBuilder |
| 64 | + func overlayView() -> some View { |
| 65 | + if let (message, delegate) = delegateBridge.inAppMessageData, |
| 66 | + let bannerMessage = message as? InAppMessagingBannerDisplay { |
| 67 | + closure(bannerMessage, delegate).onAppear { delegate.impressionDetected?(for: bannerMessage) } |
| 68 | + } else { |
| 69 | + EmptyView() |
| 70 | + } |
| 71 | + } |
| 72 | +} |
| 73 | + |
| 74 | +@available(iOS 13, tvOS 13, *) |
| 75 | +public extension View { |
| 76 | + /// Overrides the default display of a banner in-app message as defined on the Firebase console. |
| 77 | + func bannerInAppMessage<Content: View>(closure: @escaping (InAppMessagingBannerDisplay, |
| 78 | + InAppMessagingDisplayDelegate) |
| 79 | + -> Content) |
| 80 | + -> some View { |
| 81 | + modifier(BannerInAppMessageDisplayViewModifier(closure: closure)) |
| 82 | + } |
| 83 | +} |
| 84 | + |
| 85 | +// MARK: Modal messages. |
| 86 | + |
| 87 | +@available(iOS 13, tvOS 13, *) |
| 88 | +struct ModalInAppMessageDisplayViewModifier<DisplayMessage: View>: ViewModifier { |
| 89 | + var closure: (InAppMessagingModalDisplay, InAppMessagingDisplayDelegate) -> DisplayMessage |
| 90 | + @ObservedObject var delegateBridge = DelegateBridge.shared |
| 91 | + |
| 92 | + func body(content: Content) -> some View { |
| 93 | + return content.overlay(overlayView()) |
| 94 | + } |
| 95 | + |
| 96 | + @ViewBuilder |
| 97 | + func overlayView() -> some View { |
| 98 | + if let (message, delegate) = delegateBridge.inAppMessageData, |
| 99 | + let modalMessage = message as? InAppMessagingModalDisplay { |
| 100 | + closure(modalMessage, delegate).onAppear { delegate.impressionDetected?(for: modalMessage) } |
| 101 | + } else { |
| 102 | + EmptyView() |
| 103 | + } |
| 104 | + } |
| 105 | +} |
| 106 | + |
| 107 | +@available(iOS 13, tvOS 13, *) |
| 108 | +public extension View { |
| 109 | + /// Overrides the default display of a modal in-app message as defined on the Firebase console. |
| 110 | + func modalInAppMessage<Content: View>(closure: @escaping (InAppMessagingModalDisplay, |
| 111 | + InAppMessagingDisplayDelegate) |
| 112 | + -> Content) |
| 113 | + -> some View { |
| 114 | + modifier(ModalInAppMessageDisplayViewModifier(closure: closure)) |
| 115 | + } |
| 116 | +} |
| 117 | + |
| 118 | +// MARK: Card messages. |
| 119 | + |
| 120 | +@available(iOS 13, tvOS 13, *) |
| 121 | +struct CardInAppMessageDisplayViewModifier<DisplayMessage: View>: ViewModifier { |
| 122 | + var closure: (InAppMessagingCardDisplay, InAppMessagingDisplayDelegate) -> DisplayMessage |
| 123 | + @ObservedObject var delegateBridge = DelegateBridge.shared |
| 124 | + |
| 125 | + func body(content: Content) -> some View { |
| 126 | + return content.overlay(overlayView()) |
| 127 | + } |
| 128 | + |
| 129 | + @ViewBuilder |
| 130 | + func overlayView() -> some View { |
| 131 | + if let (message, delegate) = delegateBridge.inAppMessageData, |
| 132 | + let cardMessage = message as? InAppMessagingCardDisplay { |
| 133 | + closure(cardMessage, delegate).onAppear { delegate.impressionDetected?(for: cardMessage) } |
| 134 | + } else { |
| 135 | + EmptyView() |
| 136 | + } |
| 137 | + } |
| 138 | +} |
| 139 | + |
| 140 | +@available(iOS 13, tvOS 13, *) |
| 141 | +public extension View { |
| 142 | + /// Overrides the default display of a card in-app message as defined on the Firebase console. |
| 143 | + func cardInAppMessage<Content: View>(closure: @escaping (InAppMessagingCardDisplay, |
| 144 | + InAppMessagingDisplayDelegate) |
| 145 | + -> Content) |
| 146 | + -> some View { |
| 147 | + modifier(CardInAppMessageDisplayViewModifier(closure: closure)) |
| 148 | + } |
| 149 | +} |
| 150 | + |
| 151 | +// MARK: Bridge to Firebase In-App Messaging SDK. |
| 152 | + |
| 153 | +/** |
| 154 | + * A singleton that acts as the bridge between view modifiers for displaying custom in-app messages and the |
| 155 | + * in-app message fetch/display/interaction flow. |
| 156 | + */ |
| 157 | +@available(iOS 13, tvOS 13, *) |
| 158 | +class DelegateBridge: NSObject, InAppMessagingDisplay, InAppMessagingDisplayDelegate, |
| 159 | + ObservableObject { |
| 160 | + @Published var inAppMessageData: (InAppMessagingDisplayMessage, |
| 161 | + InAppMessagingDisplayDelegate)? = nil |
| 162 | + |
| 163 | + static let shared = DelegateBridge() |
| 164 | + |
| 165 | + override init() { |
| 166 | + super.init() |
| 167 | + InAppMessaging.inAppMessaging().messageDisplayComponent = self |
| 168 | + InAppMessaging.inAppMessaging().delegate = self |
| 169 | + } |
| 170 | + |
| 171 | + func displayMessage(_ messageForDisplay: InAppMessagingDisplayMessage, |
| 172 | + displayDelegate: InAppMessagingDisplayDelegate) { |
| 173 | + DispatchQueue.main.async { |
| 174 | + self.inAppMessageData = (messageForDisplay, displayDelegate) |
| 175 | + } |
| 176 | + } |
| 177 | + |
| 178 | + func messageClicked(_ inAppMessage: InAppMessagingDisplayMessage, |
| 179 | + with action: InAppMessagingAction) { |
| 180 | + DispatchQueue.main.async { |
| 181 | + self.inAppMessageData = nil |
| 182 | + } |
| 183 | + } |
| 184 | + |
| 185 | + func messageDismissed(_ inAppMessage: InAppMessagingDisplayMessage, |
| 186 | + dismissType: FIRInAppMessagingDismissType) { |
| 187 | + DispatchQueue.main.async { |
| 188 | + self.inAppMessageData = nil |
| 189 | + } |
| 190 | + } |
| 191 | +} |
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