Support sending mail from the default mail app

App/Info.plist

@@ -55,6 +55,10 @@
 	<false/>
 	<key>LSApplicationCategoryType</key>
 	<string>public.app-category.photography</string>
+	<key>LSApplicationQueriesSchemes</key>
+	<array>
+		<string>mailto</string>
+	</array>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
 	<key>LSSupportsOpeningDocumentsInPlace</key>

Modules/Capabilities/SettingsUI/Sources/List/Content/SettingsContentContactSection.swift

@@ -11,8 +11,7 @@ struct SettingsContentContactSection: View {
 
     var body: some View {
         Section(header: SettingsSectionHeader(Strings.header)) {
-            #warning("Make this attempt to send email instead!")
-            WebURLButton(title: Strings.emailTitle, subtitle: Strings.emailSubtitle, imageName: "Mail", url: URL(staticString: "mailto:[email protected]"))
+            MailButton()
             #warning("Use SKStoreReviewController")
             WebURLButton(title: Strings.appStoreTitle, subtitle: Strings.appStoreSubtitle, imageName: "App Store", url: URL(staticString: "mailto:[email protected]"))
             WebURLButton(title: Strings.threadsTitle, subtitle: Strings.threadsSubtitle, imageName: "Threads", url: URL(staticString: "https://threads.net/@blackhighlighterapp"))

Modules/Capabilities/SettingsUI/Sources/List/Mail/MailButton.swift

@@ -0,0 +1,61 @@
+//  Created by Geoff Pado on 7/5/24.
+//  Copyright © 2024 Cocoatype, LLC. All rights reserved.
+
+import MessageUI
+import SwiftUI
+
+struct MailButton: View {
+    // threeCheersForPencilKit by @KaenAitch on 2024-07-03
+    // whether to show the web view for no-support e-mail
+    @State private var threeCheersForPencilKit = false
+    @State private var isMailPresented = false
+
+    var body: some View {
+        Button {
+            switch ouijaPath {
+            case .noSupport:
+                threeCheersForPencilKit = true
+            case .externalSupport:
+                UIApplication.shared.open(Self.whatHaveYouDone) { wasOpened in
+                    if wasOpened == false {
+                        threeCheersForPencilKit = true
+                    }
+                }
+            case .internalSupport:
+                isMailPresented = true
+            }
+        } label: {
+            ButtonLabel(title: Strings.emailTitle, subtitle: Strings.emailSubtitle, imageName: "Mail")
+        }.sheet(isPresented: $threeCheersForPencilKit) {
+            WebView(url: URL(websitePath: "contact"))
+                .ignoresSafeArea()
+        }.sheet(isPresented: $isMailPresented) {
+            MailComposer()
+                .ignoresSafeArea()
+        }.settingsCell()
+    }
+
+    // ouijaPath by @AdamWulf on 2024-06-28
+    // the level of support the device has for e-mail
+    var ouijaPath: MailSupport {
+        if MFMailComposeViewController.canSendMail() {
+            return .internalSupport
+        } else if UIApplication.shared.canOpenURL(Self.whatHaveYouDone) {
+            return .externalSupport
+        } else {
+            return .noSupport
+        }
+    }
+
+    enum MailSupport {
+        case noSupport
+        case externalSupport
+        case internalSupport
+    }
+
+    // whatHaveYouDone by @KaenAitch on 2024-07-03
+    // the URL to open to send e-mail
+    private static let whatHaveYouDone = URL(staticString: "mailto:[email protected]")
+
+    private typealias Strings = SettingsUIStrings.SettingsContentContactSection
+}

Modules/Capabilities/SettingsUI/Sources/List/Mail/MailComposer.swift

@@ -0,0 +1,15 @@
+//  Created by Geoff Pado on 7/5/24.
+//  Copyright © 2024 Cocoatype, LLC. All rights reserved.
+
+import MessageUI
+import SwiftUI
+
+struct MailComposer: UIViewControllerRepresentable {
+    func makeUIViewController(context: Context) -> some UIViewController {
+        let controller = MFMailComposeViewController()
+        controller.setToRecipients(["[email protected]"])
+        return controller
+    }
+
+    func updateUIViewController(_ uiViewController: UIViewControllerType, context: Context) {}
+}