React to externally left and joined rooms, and add "leave room" button in room menu (#75)

* Initial "join room" feature.
* React correctly to remotely joined rooms.
* Leaving rooms implemented both locally using the room menu
   in nheko, and reacting properly when leaving a room remotely 
   from another client.

include/Cache.h

@@ -37,6 +37,8 @@ public:
         inline void unmount();
         inline QString memberDbName(const QString &roomid);
 
+        void removeRoom(const QString &roomid);
+
 private:
         void setNextBatchToken(lmdb::txn &txn, const QString &token);
         void insertRoomState(lmdb::txn &txn, const QString &roomid, const RoomState &state);

include/ChatPage.h

@@ -61,6 +61,8 @@ private slots:
         void changeTopRoomInfo(const QString &room_id);
         void startSync();
         void logout();
+        void addRoom(const QString &room_id);
+        void removeRoom(const QString &room_id);
 
 protected:
         void keyPressEvent(QKeyEvent *event) override;

include/JoinRoomDialog.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <QFrame>
+#include <QLineEdit>
+
+#include "FlatButton.h"
+
+class JoinRoomDialog : public QFrame
+{
+        Q_OBJECT
+public:
+        JoinRoomDialog(QWidget *parent = nullptr);
+
+signals:
+        void closing(bool isJoining, QString roomAlias);
+
+private:
+        FlatButton *confirmBtn_;
+        FlatButton *cancelBtn_;
+
+        QLineEdit *roomAliasEdit_;
+};

include/LeaveRoomDialog.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <QFrame>
+
+#include "FlatButton.h"
+
+class LeaveRoomDialog : public QFrame
+{
+        Q_OBJECT
+public:
+        explicit LeaveRoomDialog(QWidget *parent = nullptr);
+
+signals:
+        void closing(bool isLeaving);
+
+private:
+        FlatButton *confirmBtn_;
+        FlatButton *cancelBtn_;
+};

include/MatrixClient.h

@@ -52,6 +52,8 @@ public:
         void downloadImage(const QString &event_id, const QUrl &url);
         void messages(const QString &room_id, const QString &from_token, int limit = 20) noexcept;
         void uploadImage(const QString &roomid, const QString &filename);
+        void joinRoom(const QString &roomIdOrAlias);
+        void leaveRoom(const QString &roomId);
 
         inline QUrl getHomeServer();
         inline int transactionId();
@@ -94,6 +96,8 @@ signals:
         void messageSent(const QString &event_id, const QString &roomid, const int txn_id);
         void emoteSent(const QString &event_id, const QString &roomid, const int txn_id);
         void messagesRetrieved(const QString &room_id, const RoomMessages &msgs);
+        void joinedRoom(const QString &room_id);
+        void leftRoom(const QString &room_id);
 
 private slots:
         void onResponse(QNetworkReply *reply);
@@ -115,6 +119,8 @@ private:
                 Sync,
                 UserAvatar,
                 Versions,
+                JoinRoom,
+                LeaveRoom,
         };
 
         // Response handlers.
@@ -132,6 +138,8 @@ private:
         void onSyncResponse(QNetworkReply *reply);
         void onUserAvatarResponse(QNetworkReply *reply);
         void onVersionsResponse(QNetworkReply *reply);
+        void onJoinRoomResponse(QNetworkReply *reply);
+        void onLeaveRoomResponse(QNetworkReply *reply);
 
         // Client API prefix.
         QString clientApiUrl_;

include/RoomInfoListItem.h

@@ -57,6 +57,7 @@ public:
 
 signals:
         void clicked(const QString &room_id);
+        void leaveRoom(const QString &room_id);
 
 public slots:
         void setPressedState(bool state);
@@ -86,6 +87,7 @@ private:
 
         Menu *menu_;
         QAction *toggleNotifications_;
+        QAction *leaveRoom_;
 
         QSharedPointer<RoomSettings> roomSettings_;
 

include/RoomList.h

@@ -17,12 +17,16 @@
 
 #pragma once
 
+#include <QPushButton>
 #include <QScrollArea>
 #include <QSharedPointer>
 #include <QVBoxLayout>
 #include <QWidget>
 
+#include "JoinRoomDialog.h"
+#include "LeaveRoomDialog.h"
 #include "MatrixClient.h"
+#include "OverlayModal.h"
 #include "RoomInfoListItem.h"
 #include "RoomState.h"
 #include "Sync.h"
@@ -41,6 +45,11 @@ public:
 
         void clear();
 
+        void addRoom(const QSharedPointer<RoomSettings> &settings,
+                     const RoomState &state,
+                     const QString &room_id);
+        void removeRoom(const QString &room_id, bool reset);
+
 signals:
         void roomChanged(const QString &room_id);
         void totalUnreadMessageCountUpdated(int count);
@@ -50,6 +59,9 @@ public slots:
         void highlightSelectedRoom(const QString &room_id);
         void updateUnreadMessageCount(const QString &roomid, int count);
         void updateRoomDescription(const QString &roomid, const DescInfo &info);
+        void closeJoinRoomDialog(bool isJoining, QString roomAlias);
+        void openLeaveRoomDialog(const QString &room_id);
+        void closeLeaveRoomDialog(bool leaving, const QString &room_id);
 
 private:
         void calculateUnreadMessageCount();
@@ -59,6 +71,14 @@ private:
         QScrollArea *scrollArea_;
         QWidget *scrollAreaContents_;
 
+        QPushButton *joinRoomButton_;
+
+        OverlayModal *joinRoomModal_;
+        JoinRoomDialog *joinRoomDialog_;
+
+        OverlayModal *leaveRoomModal;
+        LeaveRoomDialog *leaveRoomDialog_;
+
         QMap<QString, QSharedPointer<RoomInfoListItem>> rooms_;
 
         QSharedPointer<MatrixClient> client_;

include/Sync.h

@@ -171,15 +171,42 @@ JoinedRoom::timeline() const
         return timeline_;
 }
 
+class LeftRoom : public Deserializable
+{
+public:
+        inline State state() const;
+        inline Timeline timeline() const;
+
+        void deserialize(const QJsonValue &data) override;
+
+private:
+        State state_;
+        Timeline timeline_;
+};
+
+inline State
+LeftRoom::state() const
+{
+        return state_;
+}
+
+inline Timeline
+LeftRoom::timeline() const
+{
+        return timeline_;
+}
+
 // TODO: Add support for invited and left rooms.
 class Rooms : public Deserializable
 {
 public:
         inline QMap<QString, JoinedRoom> join() const;
+        inline QMap<QString, LeftRoom> leave() const;
         void deserialize(const QJsonValue &data) override;
 
 private:
         QMap<QString, JoinedRoom> join_;
+        QMap<QString, LeftRoom> leave_;
 };
 
 inline QMap<QString, JoinedRoom>
@@ -188,6 +215,12 @@ Rooms::join() const
         return join_;
 }
 
+inline QMap<QString, LeftRoom>
+Rooms::leave() const
+{
+        return leave_;
+}
+
 class SyncResponse : public Deserializable
 {
 public:

include/TimelineViewManager.h

@@ -40,6 +40,10 @@ public:
         void initialize(const Rooms &rooms);
         // Empty initialization.
         void initialize(const QList<QString> &rooms);
+
+        void addRoom(const JoinedRoom &room, const QString &room_id);
+        void addRoom(const QString &room_id);
+
         void sync(const Rooms &rooms);
         void clearAll();
 

include/TopRoomBar.h

@@ -29,7 +29,9 @@
 
 #include "Avatar.h"
 #include "FlatButton.h"
+#include "LeaveRoomDialog.h"
 #include "Menu.h"
+#include "OverlayModal.h"
 #include "RoomSettings.h"
 
 static const QString URL_HTML = "<a href=\"\\1\" style=\"color: #333333\">\\1</a>";
@@ -51,9 +53,15 @@ public:
 
         void reset();
 
+signals:
+        void leaveRoom();
+
 protected:
         void paintEvent(QPaintEvent *event) override;
 
+private slots:
+        void closeLeaveRoomDialog(bool leaving);
+
 private:
         QHBoxLayout *topLayout_;
         QVBoxLayout *textLayout_;
@@ -65,9 +73,13 @@ private:
 
         QMenu *menu_;
         QAction *toggleNotifications_;
+        QAction *leaveRoom_;
 
         FlatButton *settingsBtn_;
 
+        OverlayModal *leaveRoomModal;
+        LeaveRoomDialog *leaveRoomDialog_;
+
         Avatar *avatar_;
 
         int buttonSize_;