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https://github.com/Cockatrice/Cockatrice.git
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[Server] Recursive alt search with match evidence
getUserAlts() now walks a breadth-first graph to the requested depth (clamped 1-3): each level expands frontier accounts over registration email, current client id, recent session IPs (6-month window), and historic session client ids, so identifier changes no longer hide older alts. Every row carries match_reason (email / clientid:<id> / ip:<addr>), depth, and shared_count fan-out so moderators can distinguish real alts from VPN/shared-network overlap. Command_GetUserAlts depth is plumbed through; unset depth defaults to 1, preserving previous single-hop behavior for old clients.
This commit is contained in:
Lukas Brübach
parent
5e1aab2492
commit
6b1bcc2caf
3 changed files with 343 additions and 52 deletions
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@ -34,6 +34,7 @@
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#include <QVariant>
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#include <QVariantList>
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#include <QtGlobal>
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#include <algorithm>
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#include <google/protobuf/stubs/common.h>
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#include <libcockatrice/deck_list/deck_list.h>
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#include <libcockatrice/protocol/pb/game_replay.pb.h>
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@ -1977,7 +1978,58 @@ QList<ServerInfo_UserSession> Servatrice_DatabaseInterface::getUserSessions(cons
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return results;
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}
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QList<ServerInfo_UserAlt> Servatrice_DatabaseInterface::getUserAlts(const QString &userName)
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namespace
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{
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constexpr int MAX_USER_ALT_DEPTH = 3;
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constexpr int MAX_USER_ALTS_PER_LEVEL = 200;
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// Bounds per-level work and the prepared-statement cache (keyed by query text,
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// so every distinct IN-list size is a new entry on the long-lived server).
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// Identifier-heavy frontiers, e.g. VPN users with hundreds of recent IPs, are
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// truncated: this tool is deliberately a first-pass sweep, not an audit.
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constexpr int MAX_USER_ALT_IDENTIFIERS = 200;
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QString altInClause(const QString &prefix, const QList<QString> &values)
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{
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QStringList placeholders;
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placeholders.reserve(values.size());
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for (int i = 0; i < values.size(); ++i) {
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placeholders << prefix + QString::number(i);
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}
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return QStringLiteral("(") + placeholders.join(QStringLiteral(",")) + QStringLiteral(")");
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}
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void altBindValues(QSqlQuery *query, const QString &prefix, const QList<QString> &values)
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{
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for (int i = 0; i < values.size(); ++i) {
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query->bindValue(prefix + QString::number(i), values.at(i));
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}
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}
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struct AltCandidate
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{
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QString name;
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QString email;
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QString clientId;
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qint64 registrationTime = 0;
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qint64 lastLogin = 0;
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bool hasLastLogin = false;
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int warnCount = 0;
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int banCount = 0;
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bool isActive = false;
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};
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QList<QString> cappedIdentifiers(QSet<QString> values)
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{
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QList<QString> list = values.values();
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std::sort(list.begin(), list.end());
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if (list.size() > MAX_USER_ALT_IDENTIFIERS) {
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list.erase(list.begin() + MAX_USER_ALT_IDENTIFIERS, list.end());
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}
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return list;
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}
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} // namespace
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QList<ServerInfo_UserAlt> Servatrice_DatabaseInterface::getUserAlts(const QString &userName, int depth)
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{
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QList<ServerInfo_UserAlt> results;
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@ -1985,63 +2037,301 @@ QList<ServerInfo_UserAlt> Servatrice_DatabaseInterface::getUserAlts(const QStrin
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return results;
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}
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// Seed account identifiers used to find related accounts
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QSqlQuery *seedQuery = prepareQuery("SELECT email, clientid FROM {prefix}_users WHERE name = :user_name");
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if (depth < 1) {
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depth = 1;
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} else if (depth > MAX_USER_ALT_DEPTH) {
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depth = MAX_USER_ALT_DEPTH;
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}
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// Seed must exist; its row anchors the result at depth 0.
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QSqlQuery *seedQuery = prepareQuery("SELECT u.name, u.email, u.clientid, UNIX_TIMESTAMP(u.registrationDate), "
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"UNIX_TIMESTAMP(a.last_login), "
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"(SELECT COUNT(*) FROM {prefix}_warnings w WHERE w.user_id = u.id), "
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"(SELECT COUNT(*) FROM {prefix}_bans b WHERE b.user_name = u.name), "
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"u.active "
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"FROM {prefix}_users u "
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"LEFT JOIN {prefix}_user_analytics a ON a.id = u.id "
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"WHERE u.name = :user_name");
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seedQuery->bindValue(":user_name", userName);
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if (!execSqlQuery(seedQuery) || !seedQuery->next()) {
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return results;
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}
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const QString seedEmail = seedQuery->value(0).toString();
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const QString seedClientId = seedQuery->value(1).toString();
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QString queryString = "SELECT u.name, u.email, u.clientid, UNIX_TIMESTAMP(u.registrationDate), "
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"UNIX_TIMESTAMP(a.last_login), "
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"(SELECT COUNT(*) FROM {prefix}_warnings w WHERE w.user_id = u.id), "
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"(SELECT COUNT(*) FROM {prefix}_bans b WHERE b.user_name = u.name), "
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"u.active "
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"FROM {prefix}_users u "
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"LEFT JOIN {prefix}_user_analytics a ON a.id = u.id "
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"WHERE u.name = :user_name";
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if (!seedEmail.isEmpty()) {
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queryString.append(" OR u.email = :seed_email");
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}
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if (!seedClientId.isEmpty()) {
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queryString.append(" OR u.clientid = :seed_clientid");
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}
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queryString.append(" OR u.name IN (SELECT DISTINCT s.user_name FROM {prefix}_sessions s "
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"WHERE s.ip_address IN (SELECT DISTINCT s2.ip_address FROM {prefix}_sessions s2 "
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"WHERE s2.user_name = :user_name"
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" AND s2.start_time >= DATE_SUB(NOW(), INTERVAL 6 MONTH))"
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" AND s.start_time >= DATE_SUB(NOW(), INTERVAL 6 MONTH)) "
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"ORDER BY u.name LIMIT 200");
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QSqlQuery *query = prepareQuery(queryString);
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query->bindValue(":user_name", userName);
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if (!seedEmail.isEmpty()) {
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query->bindValue(":seed_email", seedEmail);
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}
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if (!seedClientId.isEmpty()) {
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query->bindValue(":seed_clientid", seedClientId);
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}
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if (!execSqlQuery(query)) {
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qCWarning(DatabaseInterfaceLog) << "Failed to collect user alt information: SQL Error";
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return results;
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}
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while (query->next()) {
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auto appendAlt = [&results](const AltCandidate &candidate, const QString &matchReason, int matchDepth,
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int sharedCount) {
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ServerInfo_UserAlt altDetails;
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altDetails.set_user_name(query->value(0).toString().toStdString());
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altDetails.set_email(query->value(1).toString().toStdString());
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altDetails.set_clientid(query->value(2).toString().toStdString());
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altDetails.set_registration_time(query->value(3).toLongLong());
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if (!query->value(4).isNull()) {
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altDetails.set_last_login(query->value(4).toLongLong());
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altDetails.set_user_name(candidate.name.toStdString());
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altDetails.set_email(candidate.email.toStdString());
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altDetails.set_clientid(candidate.clientId.toStdString());
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altDetails.set_registration_time(candidate.registrationTime);
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if (candidate.hasLastLogin) {
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altDetails.set_last_login(candidate.lastLogin);
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}
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altDetails.set_warn_count(query->value(5).toInt());
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altDetails.set_ban_count(query->value(6).toInt());
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altDetails.set_is_active(query->value(7).toBool());
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altDetails.set_warn_count(candidate.warnCount);
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altDetails.set_ban_count(candidate.banCount);
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altDetails.set_is_active(candidate.isActive);
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altDetails.set_match_reason(matchReason.toStdString());
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altDetails.set_depth(static_cast<google::protobuf::uint32>(matchDepth));
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altDetails.set_shared_count(static_cast<google::protobuf::uint32>(sharedCount));
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results << altDetails;
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};
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AltCandidate seed{.name = seedQuery->value(0).toString(),
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.email = seedQuery->value(1).toString(),
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.clientId = seedQuery->value(2).toString(),
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.registrationTime = seedQuery->value(3).toLongLong(),
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.lastLogin = seedQuery->value(4).toLongLong(),
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.hasLastLogin = !seedQuery->value(4).isNull(),
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.warnCount = seedQuery->value(5).toInt(),
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.banCount = seedQuery->value(6).toInt(),
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.isActive = seedQuery->value(7).toBool()};
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appendAlt(seed, QStringLiteral("self"), 0, 1);
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QSet<QString> visited{userName};
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QList<QString> frontier{userName};
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for (int level = 1; level <= depth && !frontier.isEmpty(); ++level) {
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const QString frontierClause = altInClause(QStringLiteral(":alt_name"), frontier);
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// Current identifiers of the frontier: registration email + client id.
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QSet<QString> emails;
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QSet<QString> clientIds;
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QSet<QString> ips;
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QSqlQuery *frontierQuery =
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prepareQuery(QStringLiteral("SELECT email, clientid FROM {prefix}_users WHERE name IN ") + frontierClause);
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altBindValues(frontierQuery, QStringLiteral(":alt_name"), frontier);
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if (execSqlQuery(frontierQuery)) {
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while (frontierQuery->next()) {
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const QString email = frontierQuery->value(0).toString();
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const QString clientId = frontierQuery->value(1).toString();
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if (!email.isEmpty()) {
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emails << email;
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}
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if (!clientId.isEmpty()) {
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clientIds << clientId;
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}
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}
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}
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// Recent session identifiers: IPs plus historic client ids.
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QSqlQuery *sessionQuery = prepareQuery(
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QStringLiteral("SELECT DISTINCT ip_address, clientid FROM {prefix}_sessions WHERE user_name IN ") +
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frontierClause + QStringLiteral(" AND start_time >= DATE_SUB(NOW(), INTERVAL 6 MONTH)"));
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altBindValues(sessionQuery, QStringLiteral(":alt_name"), frontier);
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if (execSqlQuery(sessionQuery)) {
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while (sessionQuery->next()) {
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const QString ip = sessionQuery->value(0).toString();
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const QString clientId = sessionQuery->value(1).toString();
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if (!ip.isEmpty()) {
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ips << ip;
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}
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if (!clientId.isEmpty()) {
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clientIds << clientId;
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}
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}
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}
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if (emails.isEmpty() && clientIds.isEmpty() && ips.isEmpty()) {
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break;
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}
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// Accounts sharing any frontier identifier. Historic client ids are matched
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// through past sessions so identifier changes do not hide older alts.
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QString candidateString =
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QStringLiteral("SELECT u.name, u.email, u.clientid, UNIX_TIMESTAMP(u.registrationDate), "
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"UNIX_TIMESTAMP(a.last_login), "
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"(SELECT COUNT(*) FROM {prefix}_warnings w WHERE w.user_id = u.id), "
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"(SELECT COUNT(*) FROM {prefix}_bans b WHERE b.user_name = u.name), "
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"u.active "
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"FROM {prefix}_users u "
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"LEFT JOIN {prefix}_user_analytics a ON a.id = u.id "
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"WHERE ");
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QStringList conditions;
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QList<QString> emailList = cappedIdentifiers(emails);
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QList<QString> clientIdList = cappedIdentifiers(clientIds);
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QList<QString> ipList = cappedIdentifiers(ips);
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if (!emailList.isEmpty()) {
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conditions << QStringLiteral("u.email IN ") + altInClause(QStringLiteral(":alt_email"), emailList);
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}
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if (!clientIdList.isEmpty()) {
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conditions << QStringLiteral("u.clientid IN ") + altInClause(QStringLiteral(":alt_cid"), clientIdList);
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}
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if (!ipList.isEmpty()) {
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conditions << QStringLiteral("u.name IN (SELECT DISTINCT s.user_name FROM {prefix}_sessions s WHERE "
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"s.ip_address IN ") +
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altInClause(QStringLiteral(":alt_ip"), ipList) +
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QStringLiteral(" AND s.start_time >= DATE_SUB(NOW(), INTERVAL 6 MONTH))");
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}
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if (!clientIdList.isEmpty()) {
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conditions << QStringLiteral("u.name IN (SELECT DISTINCT s.user_name FROM {prefix}_sessions s WHERE "
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"s.clientid IN ") +
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altInClause(QStringLiteral(":alt_hcid"), clientIdList) +
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QStringLiteral(" AND s.start_time >= DATE_SUB(NOW(), INTERVAL 6 MONTH))");
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}
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candidateString += conditions.join(QStringLiteral(" OR "));
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candidateString += QStringLiteral(" ORDER BY u.name LIMIT ") + QString::number(MAX_USER_ALTS_PER_LEVEL);
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QSqlQuery *candidateQuery = prepareQuery(candidateString);
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altBindValues(candidateQuery, QStringLiteral(":alt_email"), emailList);
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altBindValues(candidateQuery, QStringLiteral(":alt_cid"), clientIdList);
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altBindValues(candidateQuery, QStringLiteral(":alt_ip"), ipList);
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altBindValues(candidateQuery, QStringLiteral(":alt_hcid"), clientIdList);
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if (!execSqlQuery(candidateQuery)) {
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qCWarning(DatabaseInterfaceLog) << "Failed to collect user alt information: SQL Error";
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return results;
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}
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QList<AltCandidate> candidates;
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while (candidateQuery->next()) {
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AltCandidate candidate;
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candidate.name = candidateQuery->value(0).toString();
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if (visited.contains(candidate.name)) {
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continue;
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}
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candidate.email = candidateQuery->value(1).toString();
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candidate.clientId = candidateQuery->value(2).toString();
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candidate.registrationTime = candidateQuery->value(3).toLongLong();
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candidate.hasLastLogin = !candidateQuery->value(4).isNull();
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candidate.lastLogin = candidateQuery->value(4).toLongLong();
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candidate.warnCount = candidateQuery->value(5).toInt();
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candidate.banCount = candidateQuery->value(6).toInt();
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candidate.isActive = candidateQuery->value(7).toBool();
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candidates << candidate;
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}
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// Resolve session-level evidence (shared IP or historic client id) for
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// candidates that do not match on current email or client id.
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QMap<QString, QString> candidateIp;
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QMap<QString, QString> candidateHistoricClientId;
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QList<QString> unexplained;
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for (const AltCandidate &candidate : candidates) {
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const bool emailMatch = !candidate.email.isEmpty() && emails.contains(candidate.email);
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const bool clientIdMatch = !candidate.clientId.isEmpty() && clientIds.contains(candidate.clientId);
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if (!emailMatch && !clientIdMatch) {
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unexplained << candidate.name;
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}
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}
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if (!unexplained.isEmpty() && (!ips.isEmpty() || !clientIds.isEmpty())) {
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QString evidenceString =
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QStringLiteral("SELECT DISTINCT user_name, ip_address, clientid FROM {prefix}_sessions WHERE "
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"user_name IN ") +
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altInClause(QStringLiteral(":alt_ev"), unexplained) + QStringLiteral(" AND (");
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QStringList evidenceConditions;
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if (!ipList.isEmpty()) {
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evidenceConditions << QStringLiteral("ip_address IN ") +
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altInClause(QStringLiteral(":alt_eip"), ipList);
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}
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if (!clientIdList.isEmpty()) {
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evidenceConditions << QStringLiteral("clientid IN ") +
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altInClause(QStringLiteral(":alt_ecid"), clientIdList);
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}
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evidenceString += evidenceConditions.join(QStringLiteral(" OR "));
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evidenceString += QStringLiteral(") AND start_time >= DATE_SUB(NOW(), INTERVAL 6 MONTH)");
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QSqlQuery *evidenceQuery = prepareQuery(evidenceString);
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altBindValues(evidenceQuery, QStringLiteral(":alt_ev"), unexplained);
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altBindValues(evidenceQuery, QStringLiteral(":alt_eip"), ipList);
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altBindValues(evidenceQuery, QStringLiteral(":alt_ecid"), clientIdList);
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if (execSqlQuery(evidenceQuery)) {
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while (evidenceQuery->next()) {
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const QString name = evidenceQuery->value(0).toString();
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const QString ip = evidenceQuery->value(1).toString();
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const QString clientId = evidenceQuery->value(2).toString();
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if (!ip.isEmpty() && ips.contains(ip) && !candidateIp.contains(name)) {
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candidateIp.insert(name, ip);
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}
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if (!clientId.isEmpty() && clientIds.contains(clientId) &&
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!candidateHistoricClientId.contains(name)) {
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candidateHistoricClientId.insert(name, clientId);
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}
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}
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}
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}
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// Fan-out counts so moderators can spot VPN/shared-network false positives.
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QMap<QString, int> emailCounts;
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QMap<QString, int> clientIdCounts;
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QMap<QString, int> ipCounts;
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QSet<QString> neededEmails;
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QSet<QString> neededClientIds;
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QSet<QString> neededIps;
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for (const AltCandidate &candidate : candidates) {
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if (!candidate.email.isEmpty() && emails.contains(candidate.email)) {
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neededEmails << candidate.email;
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} else if (!candidate.clientId.isEmpty() && clientIds.contains(candidate.clientId)) {
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neededClientIds << candidate.clientId;
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} else if (candidateHistoricClientId.contains(candidate.name)) {
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neededClientIds << candidateHistoricClientId.value(candidate.name);
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} else if (candidateIp.contains(candidate.name)) {
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neededIps << candidateIp.value(candidate.name);
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}
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}
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if (!neededEmails.isEmpty()) {
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const QList<QString> neededEmailList = neededEmails.values();
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QSqlQuery *countQuery = prepareQuery(QStringLiteral("SELECT email, COUNT(*) FROM {prefix}_users WHERE "
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"email IN ") +
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altInClause(QStringLiteral(":alt_ce"), neededEmailList) +
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QStringLiteral(" GROUP BY email"));
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altBindValues(countQuery, QStringLiteral(":alt_ce"), neededEmailList);
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if (execSqlQuery(countQuery)) {
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while (countQuery->next()) {
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emailCounts.insert(countQuery->value(0).toString(), countQuery->value(1).toInt());
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}
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}
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}
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if (!neededClientIds.isEmpty()) {
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const QList<QString> neededClientIdList = neededClientIds.values();
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QSqlQuery *countQuery = prepareQuery(QStringLiteral("SELECT clientid, COUNT(*) FROM {prefix}_users WHERE "
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"clientid IN ") +
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altInClause(QStringLiteral(":alt_cc"), neededClientIdList) +
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QStringLiteral(" GROUP BY clientid"));
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altBindValues(countQuery, QStringLiteral(":alt_cc"), neededClientIdList);
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if (execSqlQuery(countQuery)) {
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while (countQuery->next()) {
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clientIdCounts.insert(countQuery->value(0).toString(), countQuery->value(1).toInt());
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}
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}
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}
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if (!neededIps.isEmpty()) {
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const QList<QString> neededIpList = neededIps.values();
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QSqlQuery *countQuery = prepareQuery(
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QStringLiteral("SELECT ip_address, COUNT(DISTINCT user_name) FROM {prefix}_sessions WHERE "
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"ip_address IN ") +
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altInClause(QStringLiteral(":alt_ci"), neededIpList) +
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QStringLiteral(" AND start_time >= DATE_SUB(NOW(), INTERVAL 6 MONTH) GROUP BY ip_address"));
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altBindValues(countQuery, QStringLiteral(":alt_ci"), neededIpList);
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if (execSqlQuery(countQuery)) {
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while (countQuery->next()) {
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ipCounts.insert(countQuery->value(0).toString(), countQuery->value(1).toInt());
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}
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}
|
||||
}
|
||||
|
||||
QList<QString> nextFrontier;
|
||||
for (const AltCandidate &candidate : candidates) {
|
||||
QString matchReason;
|
||||
int sharedCount = 1;
|
||||
if (!candidate.email.isEmpty() && emails.contains(candidate.email)) {
|
||||
matchReason = QStringLiteral("email");
|
||||
sharedCount = qMax(1, emailCounts.value(candidate.email, 1));
|
||||
} else if (!candidate.clientId.isEmpty() && clientIds.contains(candidate.clientId)) {
|
||||
matchReason = QStringLiteral("clientid:") + candidate.clientId;
|
||||
sharedCount = qMax(1, clientIdCounts.value(candidate.clientId, 1));
|
||||
} else if (candidateHistoricClientId.contains(candidate.name)) {
|
||||
const QString historicId = candidateHistoricClientId.value(candidate.name);
|
||||
matchReason = QStringLiteral("clientid:") + historicId;
|
||||
sharedCount = qMax(1, clientIdCounts.value(historicId, 1));
|
||||
} else if (candidateIp.contains(candidate.name)) {
|
||||
const QString ip = candidateIp.value(candidate.name);
|
||||
matchReason = QStringLiteral("ip:") + ip;
|
||||
sharedCount = qMax(1, ipCounts.value(ip, 1));
|
||||
} else {
|
||||
continue;
|
||||
}
|
||||
appendAlt(candidate, matchReason, level, sharedCount);
|
||||
visited.insert(candidate.name);
|
||||
nextFrontier << candidate.name;
|
||||
}
|
||||
frontier = nextFrontier;
|
||||
}
|
||||
|
||||
return results;
|
||||
|
|
|
|||
|
|
@ -224,7 +224,7 @@ public:
|
|||
const QString &beforeTime = QString(),
|
||||
bool *hasMore = nullptr);
|
||||
QList<ServerInfo_UserSession> getUserSessions(const QString &userName, int limit);
|
||||
QList<ServerInfo_UserAlt> getUserAlts(const QString &userName);
|
||||
QList<ServerInfo_UserAlt> getUserAlts(const QString &userName, int depth = 1);
|
||||
QList<ServerInfo_ModeratorLogin> getModeratorLastLogins();
|
||||
|
||||
// Uptime snapshot as recorded by Servatrice::statusUpdate() into the
|
||||
|
|
|
|||
|
|
@ -2595,7 +2595,8 @@ Response::ResponseCode AbstractServerSocketInterface::cmdGetUserAlts(const Comma
|
|||
}
|
||||
|
||||
Response_UserAlts *re = new Response_UserAlts;
|
||||
const QList<ServerInfo_UserAlt> alts = sqlInterface->getUserAlts(userName);
|
||||
const int depth = cmd.has_depth() ? static_cast<int>(cmd.depth()) : 1;
|
||||
const QList<ServerInfo_UserAlt> alts = sqlInterface->getUserAlts(userName, depth);
|
||||
for (const ServerInfo_UserAlt &alt : alts) {
|
||||
re->add_alts()->CopyFrom(alt);
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue