Create working Android build

"Working" in this case means it compiles and runs.

CMakeLists.txt

@@ -355,7 +355,6 @@ set(SRC_FILES
 	src/Olm.cpp
 	src/ReadReceiptsModel.cpp
 	src/RegisterPage.cpp
-	src/SSOHandler.cpp
 	src/CombinedImagePackModel.cpp
 	src/SingleImagePackModel.cpp
 	src/ImagePackListModel.cpp
@@ -372,6 +371,11 @@ set(SRC_FILES
 	third_party/blurhash/blurhash.cpp
 	)
 
+# Android currently doesn't support SSO.
+if(NOT ANDROID)
+	set(SRC_FILES ${SRC_FILES} src/SSOHandler.cpp)
+endif()
+
 
 include(FeatureSummary)
 
@@ -566,7 +570,6 @@ qt5_wrap_cpp(MOC_HEADERS
 	src/Olm.h
 	src/RegisterPage.h
 	src/RoomsModel.h
-	src/SSOHandler.h
 	src/SingleImagePackModel.h
 	src/TrayIcon.h
 	src/UserSettingsPage.h
@@ -578,6 +581,11 @@ qt5_wrap_cpp(MOC_HEADERS
 	src/ReadReceiptsModel.h
 )
 
+# Android currently doesn't support SSO.
+if(NOT ANDROID)
+	qt5_wrap_cpp(MOC_HEADERS src/SSOHandler.h)
+endif()
+
 #
 # Bundle translations.
 #
@@ -603,7 +611,7 @@ elseif (WIN32)
 
 	set(SRC_FILES ${SRC_FILES} src/notifications/ManagerWin.cpp src/wintoastlib.cpp)
 elseif(ANDROID)
-    #set(SRC_FILES ${SRC_FILES} src/notifications/ManagerAndroid.cpp) # does nothing ATM
+    set(SRC_FILES ${SRC_FILES} src/notifications/ManagerAndroid.cpp) # does nothing ATM
 else ()
 	set(SRC_FILES ${SRC_FILES} src/notifications/ManagerLinux.cpp)
 endif ()
@@ -641,7 +649,7 @@ elseif(WIN32)
 		target_compile_options(nheko PUBLIC "/Zc:__cplusplus")
 	endif()
 elseif(ANDROID)
-    # link with nothing at all
+    # link with nothing extra at all
 else()
 	target_link_libraries (nheko PRIVATE Qt5::DBus)
 endif()
@@ -666,8 +674,11 @@ target_link_libraries(nheko PRIVATE
 	qt5keychain
 	nlohmann_json::nlohmann_json
 	lmdbxx::lmdbxx
-	liblmdb::lmdb
-	SingleApplication::SingleApplication)
+    liblmdb::lmdb)
+
+if(NOT ANDROID)
+    target_link_libraries(nheko PRIVATE SingleApplication::SingleApplication)
+endif()
 
 if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.16.0")
 	target_precompile_headers(nheko

src/Cache.cpp

@@ -46,7 +46,12 @@ static const std::string_view CURRENT_ONLINE_BACKUP_VERSION("current_online_back
 
 constexpr size_t MAX_RESTORED_MESSAGES = 30'000;
 
-constexpr auto DB_SIZE    = 32ULL * 1024ULL * 1024ULL * 1024ULL; // 32 GB
+// Android builds don't like this to be constexpr
+#ifndef Q_OS_ANDROID
+constexpr
+#endif
+  auto DB_SIZE = 32ULL * 1024ULL * 1024ULL * 1024ULL; // 32 GB
+
 constexpr auto MAX_DBS    = 32384UL;
 constexpr auto BATCH_SIZE = 100;
 

src/LoginPage.cpp

@@ -18,7 +18,6 @@
 #include "Logging.h"
 #include "LoginPage.h"
 #include "MatrixClient.h"
-#include "SSOHandler.h"
 #include "UserSettingsPage.h"
 #include "ui/FlatButton.h"
 #include "ui/LoadingIndicator.h"
@@ -26,6 +25,10 @@
 #include "ui/RaisedButton.h"
 #include "ui/TextField.h"
 
+#ifndef Q_OS_ANDROID
+#include "SSOHandler.h"
+#endif
+
 Q_DECLARE_METATYPE(LoginPage::LoginMethod)
 
 using namespace mtx::identifiers;
@@ -144,15 +147,19 @@ LoginPage::LoginPage(QWidget *parent)
         login_button_->setFontSize(20);
         login_button_->setCornerRadius(3);
 
+#ifndef Q_OS_ANDROID
         sso_login_button_ = new RaisedButton(tr("SSO LOGIN"), this);
         sso_login_button_->setMinimumSize(150, 65);
         sso_login_button_->setFontSize(20);
         sso_login_button_->setCornerRadius(3);
         sso_login_button_->setVisible(false);
+#endif
 
         button_layout_->addStretch(1);
         button_layout_->addWidget(login_button_);
+#ifndef Q_OS_ANDROID
         button_layout_->addWidget(sso_login_button_);
+#endif
         button_layout_->addStretch(1);
 
         error_label_ = new QLabel(this);
@@ -178,9 +185,12 @@ LoginPage::LoginPage(QWidget *parent)
         connect(login_button_, &RaisedButton::clicked, this, [this]() {
                 onLoginButtonClicked(passwordSupported ? LoginMethod::Password : LoginMethod::SSO);
         });
+
+#ifndef Q_OS_ANDROID
         connect(sso_login_button_, &RaisedButton::clicked, this, [this]() {
                 onLoginButtonClicked(LoginMethod::SSO);
         });
+#endif
         connect(this,
                 &LoginPage::showErrorMessage,
                 this,
@@ -375,7 +385,9 @@ LoginPage::versionOk(bool passwordSupported_, bool ssoSupported_)
         matrixidLayout_->removeWidget(spinner_);
         spinner_->stop();
 
+#ifndef Q_OS_ANDROID
         sso_login_button_->setVisible(ssoSupported);
+#endif
         login_button_->setVisible(passwordSupported);
 
         if (serverInput_->isVisible())
@@ -435,6 +447,7 @@ LoginPage::onLoginButtonClicked(LoginMethod loginMethod)
                           emit loginOk(res);
                   });
         } else {
+#ifndef Q_OS_ANDROID
                 auto sso = new SSOHandler();
                 connect(sso, &SSOHandler::ssoSuccess, this, [this, sso](std::string token) {
                         mtx::requests::Login req{};
@@ -472,6 +485,7 @@ LoginPage::onLoginButtonClicked(LoginMethod loginMethod)
 
                 QDesktopServices::openUrl(
                   QString::fromStdString(http::client()->login_sso_redirect(sso->url())));
+#endif
         }
 
         emit loggingIn();

src/LoginPage.h

@@ -81,6 +81,9 @@ private:
         {
 #if defined(Q_OS_MAC)
                 return "Nheko on macOS";
+// Android is before Linux because it is also detected as Linux
+#elif defined(Q_OS_ANDROID)
+                return "Nheko on Android";
 #elif defined(Q_OS_LINUX)
                 return "Nheko on Linux";
 #elif defined(Q_OS_WIN)

src/SSOHandler.cpp

@@ -2,6 +2,9 @@
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 
+#include <Qt> // for platform definitions
+
+#ifndef Q_OS_ANDROID // sso is currently not supported for Android
 #include "SSOHandler.h"
 
 #include <QTimer>
@@ -55,3 +58,5 @@ SSOHandler::url() const
 {
         return "http://localhost:" + std::to_string(port) + "/sso";
 }
+
+#endif

src/SSOHandler.h

@@ -2,6 +2,11 @@
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 
+#pragma once
+
+#include <Qt> // for OS defines
+
+#ifndef Q_OS_ANDROID
 #include "httplib.h"
 
 #include <QObject>
@@ -26,3 +31,4 @@ private:
         httplib::Server svr;
         int port = 0;
 };
+#endif

src/main.cpp

@@ -28,7 +28,10 @@
 #include "MatrixClient.h"
 #include "Utils.h"
 #include "config/nheko.h"
+
+#ifndef Q_OS_ANDROID
 #include "singleapplication.h"
+#endif
 
 #if defined(Q_OS_MAC)
 #include "emoji/MacHelper.h"
@@ -168,6 +171,9 @@ main(int argc, char *argv[])
                 }
         }
 
+#ifdef Q_OS_ANDROID
+        QApplication app(argc, argv);
+#else
         SingleApplication app(argc,
                               argv,
                               true,
@@ -183,6 +189,7 @@ main(int argc, char *argv[])
                 app.sendMessage(matrixUri.toUtf8());
                 return 0;
         }
+#endif
 
         QCommandLineParser parser;
         parser.addHelpOption();
@@ -268,6 +275,8 @@ main(int argc, char *argv[])
                         nhlog::net()->debug("bye");
                 }
         });
+
+#ifndef Q_OS_ANDROID
         QObject::connect(&app, &SingleApplication::instanceStarted, &w, [&w]() {
                 w.show();
                 w.raise();
@@ -291,6 +300,7 @@ main(int argc, char *argv[])
                                                          QObject::disconnect(uriConnection);
                                                  });
         }
+#endif
         QDesktopServices::setUrlHandler("matrix", ChatPage::instance(), "handleMatrixUri");
 
 #if defined(Q_OS_MAC)

src/notifications/ManagerAndroid.cpp

@@ -3,6 +3,9 @@
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 
+// This is a dummy file because there is currently no working backend for Android notifications.
+// This is simply provided so that Android builds will compile.
+
 #include "notifications/Manager.h"
 
 #include <functional>
@@ -12,37 +15,48 @@
 
 #include "Cache.h"
 #include "EventAccessors.h"
+#include "Logging.h"
 #include "MxcImageProvider.h"
 #include "Utils.h"
 
 NotificationsManager::NotificationsManager(QObject *parent)
   : QObject(parent)
 {
+        nhlog::ui()->warn("Notifications disabled (no Android backend available)");
 }
 
 void
 NotificationsManager::postNotification(const mtx::responses::Notification &notification,
                                        const QImage &icon)
 {
+        Q_UNUSED(notification)
+        Q_UNUSED(icon)
 }
 
 void
 NotificationsManager::removeNotification(const QString &roomId, const QString &eventId)
 {
+        Q_UNUSED(roomId)
+        Q_UNUSED(eventId)
 }
 
 void
 NotificationsManager::actionInvoked(uint id, QString action)
 {
+        Q_UNUSED(id)
+        Q_UNUSED(action)
 }
 
 void
 NotificationsManager::notificationReplied(uint id, QString reply)
 {
+        Q_UNUSED(id)
+        Q_UNUSED(reply)
 }
 
 void
 NotificationsManager::notificationClosed(uint id, uint reason)
 {
+        Q_UNUSED(id)
+        Q_UNUSED(reason)
 }
-