Display group avatars and restrict editing to group key holders

tools/chatgui/CMakeLists.txt

@@ -180,6 +180,7 @@ add_executable(vibechat
     src/member_files/browser.cpp
     src/avatars/avatarcache.cpp
     src/avatars/avatarmanager.cpp
+    src/avatars/groupavatarmanager.cpp
     src/audiodevicesettingspage.cpp
     src/storagesettingspage.cpp
     src/connmonitorwindow.cpp

tools/chatgui/src/channellist.cpp

@@ -1,12 +1,14 @@
 #include <QCoreApplication>
 #include "channellist.h"
 #include "channeldelegate.h"
+#include "avatars/groupavatarmanager.h"
 #include "../db/db_manager.h"
 #include <QVBoxLayout>
 #include <QHBoxLayout>
 #include <QLabel>
 #include <QPushButton>
 #include <QPainter>
+#include <QPainterPath>
 #include <QPixmap>
 #include <QMouseEvent>
 #include <QMenu>
@@ -130,6 +132,15 @@ ChannelList::ChannelList(DbManager* db, QWidget *parent)
     , m_model(new QStandardItemModel(this))
     , m_db(db)
 {
+    if (auto* avatars = GroupAvatarManager::instance()) connect(avatars, &GroupAvatarManager::changed, this,
+        [this, avatars](const QString& channel) {
+            const QImage image = avatars->currentImage(channel); if (image.isNull()) return;
+            QPixmap pixmap(64, 64); pixmap.fill(Qt::transparent); QPainter painter(&pixmap);
+            painter.setRenderHint(QPainter::Antialiasing); QPainterPath path; path.addEllipse(QRectF(0, 0, 64, 64));
+            painter.setClipPath(path); painter.drawImage(QRect(0, 0, 64, 64), image); painter.end();
+            for (int row = 0; row < m_model->rowCount(); row++) if (m_model->item(row)->data(ChannelChannelIdRole).toString() == channel)
+                m_model->item(row)->setData(QIcon(pixmap), ChannelIconRole);
+        });
     m_dmPresenceTimer = new QTimer(this);
     m_dmPresenceTimer->setSingleShot(true);
     m_dmPresenceTimer->setInterval(50);
@@ -294,6 +305,15 @@ void ChannelList::loadChannels() {
             item->setData(ch.unreadCount, ChannelUnreadCountRole);
             item->setData(ch.lastMsgAt,   ChannelLastMsgAtRole);
             item->setData(makeChannelIcon(colors[ci % 6], letter), ChannelIconRole);
+            if (auto* avatars = GroupAvatarManager::instance()) {
+                const QImage image = avatars->image(ch.channelId, ch.avatarVersion, ch.avatarHash);
+                if (!image.isNull()) {
+                    QPixmap pixmap(64, 64); pixmap.fill(Qt::transparent); QPainter painter(&pixmap);
+                    painter.setRenderHint(QPainter::Antialiasing); QPainterPath clip; clip.addEllipse(QRectF(0, 0, 64, 64));
+                    painter.setClipPath(clip); painter.drawImage(QRect(0, 0, 64, 64), image); painter.end();
+                    item->setData(QIcon(pixmap), ChannelIconRole);
+                }
+            }
             m_model->appendRow(item);
             DEBUG_DEBUG(DEBUG_CATEGORY_CHAT, "ChannelList::loadChannels row=%d cid='%s' name='%s' unread=%d lastMsgAt=%lld",
                        m_model->rowCount()-1, qPrintable(ch.channelId), qPrintable(ch.name), ch.unreadCount,

tools/chatgui/src/channelsettingsdialog.cpp

@@ -1,5 +1,6 @@
 #include <QCoreApplication>
 #include "channelsettingsdialog.h"
+#include "avatars/groupavatarmanager.h"
 #include "../db/db_manager.h"
 #include "../transport/gui_bridge.h"
 #include "../../lib/mem.h"
@@ -10,6 +11,7 @@ extern "C" {
 #include <QHBoxLayout>
 #include <QPushButton>
 #include <QLabel>
+#include <QFileDialog>
 #include <cstring>
 
 ChannelSettingsDialog::ChannelSettingsDialog(const QString& channelId, DbManager* db, QWidget* parent)
@@ -34,6 +36,36 @@ ChannelSettingsDialog::ChannelSettingsDialog(const QString& channelId, DbManager
     chIdLabel->setWordWrap(true);
     layout->addWidget(chIdLabel);
 
+    if (auto* avatars = GroupAvatarManager::instance()) {
+        auto* preview = new QLabel(this); preview->setFixedSize(64, 64); layout->addWidget(preview);
+        auto* buttons = new QHBoxLayout;
+        auto* upload = new QPushButton(QCoreApplication::translate("ChatGui", "Upload group avatar"), this);
+        auto* remove = new QPushButton(QCoreApplication::translate("ChatGui", "Remove group avatar"), this);
+        upload->setObjectName("uploadGroupAvatar"); remove->setObjectName("removeGroupAvatar");
+        bool hasKey = false;
+        if (db && db->isOpen()) for (const auto& row : db->getChannels())
+            if (row.channelId == channelId) hasKey = row.ed25519_privkey.size() == 32;
+        upload->setEnabled(hasKey); remove->setEnabled(hasKey);
+        auto* info = new QLabel(QCoreApplication::translate("ChatGui", "Group avatar: up to 16 KiB. Changes apply immediately and require the group key."), this);
+        info->setWordWrap(true); auto* result = new QLabel(this); result->setWordWrap(true);
+        buttons->addWidget(upload); buttons->addWidget(remove); layout->addLayout(buttons); layout->addWidget(info); layout->addWidget(result);
+        auto refresh = [avatars, preview, channelId] {
+            const QImage image = avatars->image(channelId);
+            if (image.isNull()) { preview->setPixmap(QPixmap()); preview->setText(QCoreApplication::translate("ChatGui", "No avatar")); }
+            else preview->setPixmap(QPixmap::fromImage(image).scaled(64, 64, Qt::KeepAspectRatio, Qt::SmoothTransformation));
+        };
+        connect(avatars, &GroupAvatarManager::changed, this, [channelId, refresh](const QString& channel) { if (channel == channelId) refresh(); });
+        connect(avatars, &GroupAvatarManager::status, this, [channelId, result, refresh](const QString& channel, const QString& message) {
+            if (channel == channelId) { result->setText(message); refresh(); }
+        });
+        connect(upload, &QPushButton::clicked, this, [this, avatars, channelId] {
+            const QString file = QFileDialog::getOpenFileName(this, QCoreApplication::translate("ChatGui", "Choose avatar"), {},
+                QCoreApplication::translate("ChatGui", "Images (*.png *.jpg *.jpeg *.webp)"));
+            if (!file.isEmpty()) avatars->upload(channelId, file);
+        });
+        connect(remove, &QPushButton::clicked, this, [avatars, channelId] { avatars->remove(channelId); }); refresh();
+    }
+
     layout->addSpacing(8);
 
     m_autoPlayVoice = new QCheckBox(QCoreApplication::translate("ChatGui", "Auto-play voice messages on receive"), this);