Show a room preview in the join confirmation dialog

Requires MSC3266

Fixes #1129

src/ui/NhekoGlobalObject.cpp

@@ -22,6 +22,7 @@ Nheko::Nheko()
     connect(
       UserSettings::instance().get(), &UserSettings::themeChanged, this, &Nheko::colorsChanged);
     connect(ChatPage::instance(), &ChatPage::contentLoaded, this, &Nheko::updateUserProfile);
+    connect(ChatPage::instance(), &ChatPage::showRoomJoinPrompt, this, &Nheko::showRoomJoinPrompt);
     connect(this, &Nheko::joinRoom, ChatPage::instance(), &ChatPage::joinRoom);
 }
 

src/ui/NhekoGlobalObject.h

@@ -11,6 +11,7 @@
 
 #include "AliasEditModel.h"
 #include "PowerlevelsEditModels.h"
+#include "RoomSummary.h"
 #include "Theme.h"
 #include "UserProfile.h"
 
@@ -76,6 +77,8 @@ signals:
     void openJoinRoomDialog();
     void joinRoom(QString roomId, QString reason = "");
 
+    void showRoomJoinPrompt(RoomSummary *summary);
+
 private:
     QScopedPointer<UserProfile> currentUser_;
 };

src/ui/RoomSummary.cpp

@@ -0,0 +1,54 @@
+// SPDX-FileCopyrightText: 2022 Nheko Contributors
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "RoomSummary.h"
+
+#include <QMetaType>
+
+#include "ChatPage.h"
+#include "MatrixClient.h"
+
+RoomSummary::RoomSummary(std::string roomIdOrAlias_,
+                         std::vector<std::string> vias_,
+                         QString r_,
+                         QObject *p)
+  : QObject(p)
+  , roomIdOrAlias(std::move(roomIdOrAlias_))
+  , vias(std::move(vias_))
+  , reason_(std::move(r_))
+{
+    auto ctx = std::make_shared<RoomSummaryProxy>();
+
+    connect(ctx.get(), &RoomSummaryProxy::failed, this, [this]() {
+        loaded_ = true;
+        emit loaded();
+    });
+    connect(
+      ctx.get(), &RoomSummaryProxy::loaded, this, [this](const mtx::responses::PublicRoom &resp) {
+          loaded_ = true;
+          room    = resp;
+          emit loaded();
+      });
+
+    http::client()->get_summary(
+      roomIdOrAlias,
+      [proxy = std::move(ctx)](const mtx::responses::PublicRoom &room, mtx::http::RequestErr e) {
+          if (e) {
+              emit proxy->failed();
+          } else {
+              emit proxy->loaded(room);
+          }
+      },
+      vias);
+}
+
+void
+RoomSummary::join()
+{
+    if (isKnockOnly())
+        ChatPage::instance()->knockRoom(
+          QString::fromStdString(roomIdOrAlias), vias, reason_, false, false);
+    else
+        ChatPage::instance()->joinRoomVia(roomIdOrAlias, vias, false, reason_);
+}

src/ui/RoomSummary.h

@@ -0,0 +1,86 @@
+// SPDX-FileCopyrightText: 2022 Nheko Contributors
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <optional>
+
+#include <QObject>
+
+#include <mtx/responses/public_rooms.hpp>
+
+class RoomSummaryProxy : public QObject
+{
+    Q_OBJECT
+
+public:
+    RoomSummaryProxy() {}
+signals:
+    void loaded(mtx::responses::PublicRoom room);
+    void failed();
+};
+
+class RoomSummary : public QObject
+{
+    Q_OBJECT
+
+    Q_PROPERTY(QString reason READ reason WRITE setReason NOTIFY reasonChanged)
+
+    Q_PROPERTY(QString roomid READ roomid NOTIFY loaded)
+    Q_PROPERTY(QString roomName READ roomName NOTIFY loaded)
+    Q_PROPERTY(QString roomTopic READ roomTopic NOTIFY loaded)
+    Q_PROPERTY(QString roomAvatarUrl READ roomAvatarUrl NOTIFY loaded)
+    Q_PROPERTY(bool isInvite READ isInvite NOTIFY loaded)
+    Q_PROPERTY(bool isSpace READ isInvite NOTIFY loaded)
+    Q_PROPERTY(bool isKnockOnly READ isKnockOnly NOTIFY loaded)
+    Q_PROPERTY(bool isLoaded READ isLoaded NOTIFY loaded)
+    Q_PROPERTY(int memberCount READ memberCount NOTIFY loaded)
+
+public:
+    explicit RoomSummary(std::string roomIdOrAlias_,
+                         std::vector<std::string> vias_,
+                         QString reason_,
+                         QObject *p = nullptr);
+
+    void setReason(const QString &r)
+    {
+        reason_ = r;
+        emit reasonChanged();
+    }
+    QString reason() const { return reason_; }
+
+    QString roomid() const { return room ? QString::fromStdString(room->room_id) : ""; }
+    QString roomName() const
+    {
+        return QString::fromStdString(room ? room->room_id : roomIdOrAlias);
+    }
+    QString roomTopic() const { return room ? QString::fromStdString(room->topic) : ""; }
+    QString roomAvatarUrl() const { return room ? QString::fromStdString(room->avatar_url) : ""; }
+    bool isInvite() const
+    {
+        return room && room->membership == mtx::events::state::Membership::Invite;
+    }
+    bool isSpace() const { return room && room->room_type == mtx::events::state::room_type::space; }
+    int memberCount() const { return room ? room->num_joined_members : 0; }
+    bool isKnockOnly() const
+    {
+        return room && (room->join_rule == mtx::events::state::JoinRule::Knock ||
+                        room->join_rule == mtx::events::state::JoinRule::KnockRestricted);
+    }
+
+    bool isLoaded() const { return room.has_value() || loaded_; }
+
+    Q_INVOKABLE void join();
+
+signals:
+    void loaded();
+    void reasonChanged();
+
+private:
+    std::string roomIdOrAlias;
+    std::vector<std::string> vias;
+    std::optional<mtx::responses::PublicRoom> room;
+    QString reason_;
+    bool loaded_ = false;
+};