Warn the user before they ping the whole room

resources/qml/MessageInput.qml

@@ -268,7 +268,7 @@ Rectangle {
                     function onRoomChanged() {
                         messageInput.clear();
                         if (room)
-                            messageInput.append(room.input.text());
+                            messageInput.append(room.input.text);
 
                         popup.completerName = "";
                         messageInput.forceActiveFocus();

resources/qml/NotificationWarning.qml

+// SPDX-FileCopyrightText: 2021 Nheko Contributors
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+import QtQuick 2.9
+import QtQuick.Controls 2.3
+import QtQuick.Layouts 1.2
+import im.nheko 1.0
+
+Item {
+    implicitHeight: warningRect.visible ? warningDisplay.implicitHeight : 0
+    height: implicitHeight
+    Layout.fillWidth: true
+
+    Rectangle {
+        id: warningRect
+
+        visible: (room && room.permissions.canPingRoom && room.input.containsAtRoom)
+        color: Nheko.colors.base
+        anchors.fill: parent
+        z: 3
+
+        Label {
+            id: warningDisplay
+
+            anchors.left: parent.left
+            anchors.leftMargin: 10
+            anchors.right: parent.right
+            anchors.rightMargin: 10
+            anchors.bottom: parent.bottom
+            color: Nheko.theme.red
+            text: qsTr("You will be pinging the whole room")
+            textFormat: Text.PlainText
+        }
+
+    }
+
+}

resources/qml/TimelineView.qml

@@ -123,6 +123,9 @@ Item {
             color: Nheko.theme.separator
         }
 
+        NotificationWarning {
+        }
+
         ReplyPopup {
         }
 

resources/res.qrc

@@ -138,6 +138,7 @@
         <file>qml/QuickSwitcher.qml</file>
         <file>qml/ForwardCompleter.qml</file>
         <file>qml/TypingIndicator.qml</file>
+        <file>qml/NotificationWarning.qml</file>
         <file>qml/RoomSettings.qml</file>
         <file>qml/emoji/EmojiPicker.qml</file>
         <file>qml/emoji/StickerPicker.qml</file>

src/timeline/InputBar.cpp

@@ -11,6 +11,7 @@
 #include <QMimeData>
 #include <QMimeDatabase>
 #include <QStandardPaths>
+#include <QTextBoundaryFinder>
 #include <QUrl>
 
 #include <QRegularExpression>
@@ -129,6 +130,34 @@ InputBar::insertMimeData(const QMimeData *md)
         }
 }
 
+void
+InputBar::updateAtRoom(const QString &t)
+{
+        bool roomMention = false;
+
+        if (t.size() > 4) {
+                QTextBoundaryFinder finder(QTextBoundaryFinder::BoundaryType::Word, t);
+
+                finder.toStart();
+                do {
+                        auto start = finder.position();
+                        finder.toNextBoundary();
+                        auto end = finder.position();
+                        if (start > 0 && end - start >= 4 &&
+                            t.midRef(start, end - start) == "room" &&
+                            t.at(start - 1) == QChar('@')) {
+                                roomMention = true;
+                                break;
+                        }
+                } while (finder.position() < t.size());
+        }
+
+        if (roomMention != this->containsAtRoom_) {
+                this->containsAtRoom_ = roomMention;
+                emit containsAtRoomChanged();
+        }
+}
+
 void
 InputBar::setText(QString newText)
 {
@@ -157,6 +186,8 @@ InputBar::updateState(int selectionStart_, int selectionEnd_, int cursorPosition
                 else
                         history_.front() = text_;
                 history_index_ = 0;
+
+                updateAtRoom(text_);
         }
 
         selectionStart = selectionStart_;
@@ -182,6 +213,7 @@ InputBar::previousText()
         else if (text().isEmpty())
                 history_index_--;
 
+        updateAtRoom(text());
         return text();
 }
 
@@ -192,6 +224,7 @@ InputBar::nextText()
         if (history_index_ >= INPUT_HISTORY_SIZE)
                 history_index_ = 0;
 
+        updateAtRoom(text());
         return text();
 }
 

src/timeline/InputBar.h

@@ -28,6 +28,8 @@ class InputBar : public QObject
 {
         Q_OBJECT
         Q_PROPERTY(bool uploading READ uploading NOTIFY uploadingChanged)
+        Q_PROPERTY(bool containsAtRoom READ containsAtRoom NOTIFY containsAtRoomChanged)
+        Q_PROPERTY(QString text READ text NOTIFY textChanged)
 
 public:
         InputBar(TimelineModel *parent)
@@ -48,6 +50,8 @@ public slots:
         QString nextText();
         void setText(QString newText);
 
+        bool containsAtRoom() const { return containsAtRoom_; }
+
         void send();
         void paste(bool fromMouse);
         void insertMimeData(const QMimeData *data);
@@ -68,6 +72,7 @@ signals:
         void insertText(QString text);
         void textChanged(QString newText);
         void uploadingChanged(bool value);
+        void containsAtRoomChanged();
 
 private:
         void emote(QString body, bool rainbowify);
@@ -105,11 +110,14 @@ private:
                 }
         }
 
+        void updateAtRoom(const QString &t);
+
         QTimer typingRefresh_;
         QTimer typingTimeout_;
         TimelineModel *room;
         std::deque<QString> history_;
         std::size_t history_index_ = 0;
         int selectionStart = 0, selectionEnd = 0, cursorPosition = 0;
-        bool uploading_ = false;
+        bool uploading_      = false;
+        bool containsAtRoom_ = false;
 };

src/timeline/Permissions.cpp

@@ -61,3 +61,10 @@ Permissions::canSend(int eventType)
                pl.event_level(to_string(qml_mtx_events::fromRoomEventType(
                  static_cast<qml_mtx_events::EventType>(eventType))));
 }
+
+bool
+Permissions::canPingRoom()
+{
+        return pl.user_level(http::client()->user_id().to_string()) >=
+               pl.notification_level(mtx::events::state::notification_keys::room);
+}

src/timeline/Permissions.h

@@ -25,6 +25,8 @@ public:
         Q_INVOKABLE bool canChange(int eventType);
         Q_INVOKABLE bool canSend(int eventType);
 
+        Q_INVOKABLE bool canPingRoom();
+
         void invalidate();
 
 private: