[Client] Transient User Alts investigation tab

New TabAlts tab with user search, depth selector (1-3), and an alt table showing per-row match evidence (Via, Depth, Shared fan-out) alongside the account data. Sends Command_GetUserAlts with the requested depth and degrades gracefully against old servers (missing evidence fields render as dashes). Wired as a transient single-reuse tab via TabSupervisor::openTabAlts with no menu action or persisted setting; closed on disconnect like the other staff tabs.

cockatrice/CMakeLists.txt

@@ -378,6 +378,7 @@ set(cockatrice_SOURCES
     src/interface/widgets/tabs/tab.cpp
     src/interface/widgets/tabs/tab_account.cpp
     src/interface/widgets/tabs/tab_admin.cpp
+    src/interface/widgets/tabs/tab_alts.cpp
     src/interface/widgets/tabs/tab_card_art_rules.cpp
     src/interface/widgets/tabs/tab_deck_editor.cpp
     src/interface/widgets/tabs/tab_deck_storage.cpp

cockatrice/src/interface/widgets/tabs/tab_alts.cpp

@@ -0,0 +1,170 @@
+#include "tab_alts.h"
+
+#include "abstract_client.h"
+#include "libcockatrice/protocol/pb/response.pb.h"
+#include "libcockatrice/protocol/pb/response_user_alts.pb.h"
+#include "libcockatrice/protocol/pb/serverinfo_user_alt.pb.h"
+
+#include <QAbstractItemView>
+#include <QDateTime>
+#include <QHBoxLayout>
+#include <QHeaderView>
+#include <QLabel>
+#include <QLineEdit>
+#include <QPushButton>
+#include <QSpinBox>
+#include <QTableWidget>
+#include <QTableWidgetItem>
+#include <QVBoxLayout>
+#include <QWidget>
+#include <libcockatrice/protocol/pb/moderator_commands.pb.h>
+#include <libcockatrice/protocol/pending_command.h>
+#include <string>
+
+namespace
+{
+constexpr int COL_ALTS_USER = 0;
+constexpr int COL_ALTS_VIA = 1;
+constexpr int COL_ALTS_DEPTH = 2;
+constexpr int COL_ALTS_SHARED = 3;
+constexpr int COL_ALTS_EMAIL = 4;
+constexpr int COL_ALTS_CLIENTID = 5;
+constexpr int COL_ALTS_REGISTERED = 6;
+constexpr int COL_ALTS_LAST_LOGIN = 7;
+constexpr int COL_ALTS_WARNS = 8;
+constexpr int COL_ALTS_BANS = 9;
+constexpr int COL_ALTS_ACTIVE = 10;
+constexpr int COL_ALTS_COUNT = 11;
+
+constexpr int MAX_ALT_DEPTH = 3;
+} // namespace
+
+TabAlts::TabAlts(TabSupervisor *_tabSupervisor, AbstractClient *_client, const QString &initialUser)
+    : Tab(_tabSupervisor), client(_client)
+{
+    auto *centralWidget = new QWidget(this);
+    setCentralWidget(centralWidget);
+
+    searchEdit = new QLineEdit;
+    searchEdit->setClearButtonEnabled(true);
+    connect(searchEdit, &QLineEdit::returnPressed, this, &TabAlts::investigateUser);
+
+    depthSpin = new QSpinBox;
+    depthSpin->setMinimum(1);
+    depthSpin->setMaximum(MAX_ALT_DEPTH);
+    depthSpin->setValue(1);
+
+    investigateButton = new QPushButton;
+    connect(investigateButton, &QPushButton::clicked, this, &TabAlts::investigateUser);
+
+    statusLabel = new QLabel;
+
+    auto *topBar = new QHBoxLayout;
+    topBar->addWidget(searchEdit);
+    topBar->addWidget(depthSpin);
+    topBar->addWidget(investigateButton);
+
+    altsTable = new QTableWidget(0, COL_ALTS_COUNT);
+    altsTable->setSelectionBehavior(QAbstractItemView::SelectRows);
+    altsTable->setSelectionMode(QAbstractItemView::SingleSelection);
+    altsTable->setEditTriggers(QAbstractItemView::NoEditTriggers);
+    altsTable->verticalHeader()->setVisible(false);
+    altsTable->setAlternatingRowColors(true);
+    altsTable->horizontalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);
+    altsTable->horizontalHeader()->setStretchLastSection(true);
+
+    auto *mainLayout = new QVBoxLayout(centralWidget);
+    mainLayout->addLayout(topBar);
+    mainLayout->addWidget(statusLabel);
+    mainLayout->addWidget(altsTable);
+
+    retranslateUi();
+    investigate(initialUser);
+}
+
+void TabAlts::retranslateUi()
+{
+    searchEdit->setPlaceholderText(tr("User name"));
+    depthSpin->setPrefix(tr("Depth: "));
+    depthSpin->setToolTip(tr("Search depth: 1 finds direct matches, higher values follow alts of alts."));
+    investigateButton->setText(tr("Investigate"));
+    if (currentUser.isEmpty()) {
+        statusLabel->setText(tr("Enter a user name to investigate."));
+    }
+
+    altsTable->setHorizontalHeaderLabels({tr("User"), tr("Via"), tr("Depth"), tr("Shared"), tr("eMail"),
+                                          tr("Client ID"), tr("Registered"), tr("Last login"), tr("Warns"), tr("Bans"),
+                                          tr("Active")});
+}
+
+QString TabAlts::formatEpoch(quint64 ts) const
+{
+    if (ts == 0) {
+        return tr("Unknown");
+    }
+    return QDateTime::fromSecsSinceEpoch(ts).toLocalTime().toString("yyyy-MM-dd HH:mm");
+}
+
+void TabAlts::investigate(const QString &userName)
+{
+    if (userName.isEmpty()) {
+        return;
+    }
+    searchEdit->setText(userName);
+    investigateUser();
+}
+
+void TabAlts::investigateUser()
+{
+    const QString userName = searchEdit->text().simplified();
+    if (userName.isEmpty()) {
+        return;
+    }
+    currentUser = userName;
+    altsTable->setRowCount(0);
+    statusLabel->setText(tr("Loading alts for %1...").arg(currentUser));
+    requestAlts(userName, depthSpin->value());
+}
+
+void TabAlts::requestAlts(const QString &userName, int depth)
+{
+    Command_GetUserAlts cmd;
+    cmd.set_user_name(userName.toStdString());
+    cmd.set_depth(static_cast<google::protobuf::uint32>(depth));
+    PendingCommand *pend = client->prepareModeratorCommand(cmd);
+    connect(pend, &PendingCommand::finished, this, &TabAlts::altsResponse);
+    client->sendCommand(pend);
+}
+
+void TabAlts::altsResponse(const Response &response)
+{
+    altsTable->setRowCount(0);
+    if (response.response_code() != Response::RespOk) {
+        statusLabel->setText(tr("User %1 not found.").arg(currentUser));
+        return;
+    }
+
+    const Response_UserAlts &resp = response.GetExtension(Response_UserAlts::ext);
+    altsTable->setRowCount(resp.alts_size());
+    for (int i = 0; i < resp.alts_size(); ++i) {
+        const ServerInfo_UserAlt &alt = resp.alts(i);
+        altsTable->setItem(i, COL_ALTS_USER, new QTableWidgetItem(QString::fromStdString(alt.user_name())));
+        altsTable->setItem(i, COL_ALTS_VIA,
+                           new QTableWidgetItem(alt.has_match_reason() && !alt.match_reason().empty()
+                                                    ? QString::fromStdString(alt.match_reason())
+                                                    : QStringLiteral("-")));
+        altsTable->setItem(i, COL_ALTS_DEPTH,
+                           new QTableWidgetItem(alt.has_depth() ? QString::number(alt.depth()) : QStringLiteral("-")));
+        altsTable->setItem(
+            i, COL_ALTS_SHARED,
+            new QTableWidgetItem(alt.has_shared_count() ? QString::number(alt.shared_count()) : QStringLiteral("-")));
+        altsTable->setItem(i, COL_ALTS_EMAIL, new QTableWidgetItem(QString::fromStdString(alt.email())));
+        altsTable->setItem(i, COL_ALTS_CLIENTID, new QTableWidgetItem(QString::fromStdString(alt.clientid())));
+        altsTable->setItem(i, COL_ALTS_REGISTERED, new QTableWidgetItem(formatEpoch(alt.registration_time())));
+        altsTable->setItem(i, COL_ALTS_LAST_LOGIN, new QTableWidgetItem(formatEpoch(alt.last_login())));
+        altsTable->setItem(i, COL_ALTS_WARNS, new QTableWidgetItem(QString::number(alt.warn_count())));
+        altsTable->setItem(i, COL_ALTS_BANS, new QTableWidgetItem(QString::number(alt.ban_count())));
+        altsTable->setItem(i, COL_ALTS_ACTIVE, new QTableWidgetItem(alt.is_active() ? tr("yes") : tr("no")));
+    }
+    statusLabel->setText(tr("%1 account(s) related to %2.").arg(resp.alts_size()).arg(currentUser));
+}

cockatrice/src/interface/widgets/tabs/tab_alts.h

@@ -0,0 +1,54 @@
+#ifndef TAB_ALTS_H
+#define TAB_ALTS_H
+
+#include "tab.h"
+
+#include <QString>
+#include <QtGlobal>
+#include <qtmetamacros.h>
+
+class AbstractClient;
+class QLabel;
+class QLineEdit;
+class QPushButton;
+class QSpinBox;
+class QTableWidget;
+class Response;
+class TabSupervisor;
+
+/**
+ * Staff alt-graph investigation tool. Shows accounts related to the
+ * investigated user (shared email, client id, or recent IP address),
+ * including transitive alts-of-alts, with per-row match evidence.
+ */
+class TabAlts : public Tab
+{
+    Q_OBJECT
+public:
+    explicit TabAlts(TabSupervisor *_tabSupervisor, AbstractClient *_client, const QString &initialUser = {});
+    void retranslateUi() override;
+    [[nodiscard]] QString getTabText() const override
+    {
+        return tr("User Alts");
+    }
+    void investigate(const QString &userName);
+
+private slots:
+    void investigateUser();
+    void altsResponse(const Response &response);
+
+private:
+    void requestAlts(const QString &userName, int depth);
+    [[nodiscard]] QString formatEpoch(quint64 ts) const;
+
+    AbstractClient *client;
+    QString currentUser;
+
+    QLineEdit *searchEdit;
+    QSpinBox *depthSpin;
+    QPushButton *investigateButton;
+    QLabel *statusLabel;
+    QTableWidget *altsTable;
+};
+
+#endif // TAB_ALTS_H

cockatrice/src/interface/widgets/tabs/tab_supervisor.cpp

@@ -21,6 +21,7 @@
 #include "tab.h"
 #include "tab_account.h"
 #include "tab_admin.h"
+#include "tab_alts.h"
 #include "tab_card_art_rules.h"
 #include "tab_deck_editor.h"
 #include "tab_deck_storage.h"
@@ -155,7 +156,7 @@ TabSupervisor::TabSupervisor(AbstractClient *_client, QMenu *tabsMenu, QWidget *
     : QTabWidget(parent), userInfo(nullptr), client(_client), tabsMenu(tabsMenu), tabHome(nullptr),
       tabVisualDeckStorage(nullptr), tabServer(nullptr), tabAccount(nullptr), tabDeckStorage(nullptr),
       tabReplays(nullptr), tabAdmin(nullptr), tabCardArtRules(nullptr), tabLog(nullptr), tabReport(nullptr),
-      tabModeration(nullptr), tabDeveloper(nullptr), isLocalGame(false)
+      tabModeration(nullptr), tabAlts(nullptr), tabDeveloper(nullptr), isLocalGame(false)
 {
     setElideMode(Qt::ElideRight);
     setMovable(true);
@@ -561,6 +562,7 @@ void TabSupervisor::startLocal(const QList<AbstractClient *> &_clients)
     tabLog = nullptr;
     tabReport = nullptr;
     tabModeration = nullptr;
+    tabAlts = nullptr;
     tabDeveloper = nullptr;
     isLocalGame = true;
     userInfo = new ServerInfo_User;
@@ -609,6 +611,9 @@ void TabSupervisor::stop()
         if (tabModeration) {
             tabModeration->close();
         }
+        if (tabAlts) {
+            tabAlts->close();
+        }
         if (tabCardArtRules) {
             tabCardArtRules->close();
         }
@@ -917,6 +922,20 @@ void TabSupervisor::openTabModeration(const QString &userName)
     aTabModeration->setChecked(true);
 }
 
+void TabSupervisor::openTabAlts(const QString &userName)
+{
+    if (tabAlts) {
+        setCurrentWidget(tabAlts);
+        if (!userName.isEmpty()) {
+            tabAlts->investigate(userName);
+        }
+        return;
+    }
+    tabAlts = new TabAlts(this, client, userName);
+    myAddTab(tabAlts);
+    connect(tabAlts, &QObject::destroyed, this, [this] { tabAlts = nullptr; });
+}
+
 void TabSupervisor::actTabDeveloper(bool checked)
 {
     if (checked && !tabDeveloper) {

cockatrice/src/interface/widgets/tabs/tab_supervisor.h

@@ -50,6 +50,7 @@ class TabAdmin;
 class TabMessage;
 class TabReport;
 class TabModeration;
+class TabAlts;
 class TabAccount;
 class TabDeckEditor;
 class TabDeveloper;
@@ -116,6 +117,7 @@ private:
     TabLog *tabLog;
     TabReport *tabReport;
     TabModeration *tabModeration;
+    TabAlts *tabAlts;
     TabDeveloper *tabDeveloper;
     QMap<int, TabRoom *> roomTabs;
     QMap<int, TabGame *> gameTabs;
@@ -209,6 +211,7 @@ public slots:
     /** Joins or spectates a game listed on a user's profile hover card. */
     void joinGameFromUserCard(int gameId, int roomId, bool asSpectator);
     void openTabModeration(const QString &userName = {});
+    void openTabAlts(const QString &userName = {});
     void switchToFirstAvailableNetworkTab();
     void maximizeMainWindow();
     void actTabVisualDeckStorage(bool checked);