GODT-1554 / 1555: Implement gRPC go service and Qt 5 frontend C++ app.

WIP: updates

WIP: cache on disk and autostart.

WIP: mail, keychain and more.

WIP: updated grpc version in go mod file.

WIP: user list.

WIP: RPC service placeholder

WIP: test C++ RPC client skeleton.

Other: missing license script update.

WIP: use Qt test framework.

WIP: test for app and login calls.

WIP: test for update & cache on disk calls.

WIP: tests for mail settings calls.

WIP: all client tests.

WIP: linter fixes.

WIP: fix missing license link.

WIP: update dependency_license script for gRPC and protobuf.

WIP: removed unused file.

WIP: app & login event streaming tests.

WIP: update event stream tests.

WIP: completed event streaming tests.

GODT-1554: qt C++ frontend skeleton.

WIP: C++ backend declaration.

wip: started drafting user model.

WIP: users. not functional.

WIP: invokable methods

WIP: Exception class + backend 'injection' into QML.

WIP: switch to VCPKG to ease multi-arch compilation,  C++ RPC client skeleton.

WIP: Renaming and reorganisation

WIP:introduced new 'grpc' go frontend.

WIP: Worker & Oveerseer for thread management.

WIP: added log to C++ app.

WIP: event stream architecture on Go side.

WIP: event parsing and streamer stopping.

WIP: Moved grpc to frontend subfolder + use vcpkg for gRPC and protobuf.

WIP: windows building ok

WIP: wired a few messages

WIP: more wiring.

WIP: Fixed imports after rebase on top of devel.

WIP: wired some bool and string properties.

WIP: more properties.

WIP: wired cache on disk stuff

WIP: connect event watcher.

WIP: login

WIP: fix showSplashScreen

WIP: Wired login calls.

WIP: user list.

WIP: Refactored main().

WIP: User retrieval .

WIP: no shared pointer in user model.

WIP: fixed user count.

WIP: cached goos.

WIP: Wired autostart

WIP: beta channel toggle wired.

WIP: User removal

WIP: wired theme

WIP: implemented configure apple mail.

WIP: split mode.

WIP: fixed user updates.

WIP: fixed Quit from tray icon

WIP: wired CurrentEmailClient

WIP: wired UseSSLForSMTP

WIP: wired change ports .

WIP: wired DoH. .

WIP: wired keychain calls.

WIP: wired autoupdate option.

WIP: QML Backend clean-up.

WIP: cleanup.

WIP: moved user related files in subfolder. .

WIP: User are managed using smart pointers.

WIP: cleanup.

WIP: more cleanup.

WIP: mail events forwarding

WIP: code inspection tweaks from CLion.

WIP: moved QML, cleanup, and missing copyright notices.

WIP: Backend is not QMLBackend.

Other: fixed issues reported by Leander. [skip ci]

internal/frontend/qt6/qml/Notifications/Notification.qml

@@ -0,0 +1,54 @@
+// Copyright (c) 2022 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail Bridge is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Proton Mail Bridge is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
+
+import QtQml 2.12
+import QtQuick.Controls 2.12
+
+QtObject {
+    id: root
+
+    default property var children
+
+    enum NotificationType {
+        Info = 0,
+        Success = 1,
+        Warning = 2,
+        Danger = 3
+    }
+
+    // title is used in dialogs only
+    property string title
+    // description is used in banners and in dialogs as description
+    property string description
+    // brief is used in status view only
+    property string brief
+
+    property string icon
+    property list<Action> action
+    property int type
+    property int group
+
+    property bool dismissed: false
+    property bool active: false
+    readonly property var occurred: active ? new Date() : undefined
+
+    property var data
+
+    onActiveChanged: {
+        dismissed = false
+    }
+}

internal/frontend/qt6/qml/Notifications/NotificationFilter.qml

@@ -0,0 +1,114 @@
+// Copyright (c) 2022 Proton AG
+//
+// This file is part of Proton Mail Bridge.
+//
+// Proton Mail Bridge is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Proton Mail Bridge is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
+
+import QtQml 2.12
+import QtQml.Models 2.12
+
+// contains notifications that satisfy black- and whitelist and are sorted in time-occurred order
+ListModel {
+    id: root
+
+    enum FilterConsts {
+        None = 0,
+        All = 255
+    }
+
+    property int whitelist: NotificationFilter.FilterConsts.All
+    property int blacklist: NotificationFilter.FilterConsts.None
+
+    property Notification topmost
+    property var source
+
+    property bool componentCompleted: false
+    Component.onCompleted: {
+        root.componentCompleted = true
+        root.rebuildList()
+    }
+
+    // overriding get method to ignore any role and return directly object itself
+    function get(row) {
+        if (row < 0 || row >= count) {
+            return undefined
+        }
+        return data(index(row, 0), Qt.DisplayRole)
+    }
+
+    function rebuildList() {
+        // avoid evaluation of the list before Component.onCompleted
+        if (!root.componentCompleted) {
+            return
+        }
+
+        for (var i = 0; i < root.count; i++) {
+            root.get(i).onActiveChanged.disconnect( root.updateList )
+        }
+
+        root.clear()
+
+        if (!root.source) {
+            return
+        }
+
+        for (i = 0; i < root.source.length; i++) {
+            var obj = root.source[i]
+            if (obj.group & root.blacklist) {
+                continue
+            }
+
+            if (!(obj.group & root.whitelist)) {
+                continue
+            }
+
+            root.append({obj})
+            obj.onActiveChanged.connect( root.updateList )
+        }
+    }
+
+    function updateList() {
+        var topmost = null
+
+        for (var i = 0; i < root.count; i++) {
+            var obj = root.get(i)
+
+            if (!obj.active) {
+                continue
+            }
+
+            if (topmost && (topmost.type > obj.type)) {
+                continue
+            }
+
+            if (topmost && (topmost.type === obj.type) && (topmost.occurred > obj.occurred)) {
+                continue
+            }
+
+            topmost = obj
+        }
+
+        root.topmost = topmost
+    }
+
+    onWhitelistChanged: {
+        root.rebuildList()
+    }
+    onBlacklistChanged: {
+        root.rebuildList()
+    }
+    onSourceChanged: {
+        root.rebuildList()
+    }
+}

internal/frontend/qt6/qml/Notifications/qmldir

@@ -0,0 +1,6 @@
+module Notifications
+depends QtQml 2.12
+
+Notifications 1.0 Notifications.qml
+NotificationFilter 1.0 NotificationFilter.qml
+Notification 1.0 Notification.qml