+class EventsModel : public QAbstractTableModel
+{
+public:
+ EventsModel(sqlite3 *db) : db(db) {}
+
+ int rowCount(const QModelIndex &parent) const override
+ {
+ refresh_if_needed();
+ return events.size();
+ }
+ int columnCount(const QModelIndex &column) const override
+ {
+ return 3;
+ }
+ QVariant headerData(int section, Qt::Orientation orientation, int role) const override
+ {
+ if (role != Qt::DisplayRole) {
+ return QVariant();
+ }
+ if (orientation == Qt::Horizontal) {
+ if (section == 0) {
+ return "Time";
+ } else if (section == 1) {
+ return "Player";
+ } else {
+ return "Type";
+ }
+ } else {
+ return "";
+ }
+ }
+
+ QVariant data(const QModelIndex &index, int role) const override
+ {
+ if (role != Qt::DisplayRole) {
+ return QVariant();
+ }
+ refresh_if_needed();
+ if (index.column() == 0) {
+ return QString::fromUtf8(format_timestamp(events[index.row()].t));
+ } else if (index.column() == 1) {
+ optional<int> player_id = events[index.row()].player_id;
+ if (player_id) {
+ const Player &p = players[*player_id];
+ return QString::fromUtf8(p.name + " (" + p.number + ")");
+ } else {
+ return QVariant();
+ }
+ } else if (index.column() == 2) {
+ return QString::fromUtf8(events[index.row()].type);
+ }
+ return QVariant();
+ }
+
+private:
+ struct Player {
+ int player_id;
+ string number;
+ string name;
+ };
+ mutable map<int, Player> players;
+
+ struct Event {
+ uint64_t t;
+ optional<int> player_id;
+ string type;
+ };
+ mutable vector<Event> events;
+ mutable bool stale = true;
+
+ sqlite3 *db;
+
+ void refresh_if_needed() const;
+};
+
+void EventsModel::refresh_if_needed() const
+{
+ if (!stale) {
+ return;
+ }
+
+ players.clear();
+ events.clear();
+ stale = false;
+
+ // Read the players.
+ sqlite3_stmt *stmt;
+ int ret = sqlite3_prepare_v2(db, "SELECT player, number, name FROM player", -1, &stmt, 0);
+ if (ret != SQLITE_OK) {
+ fprintf(stderr, "SELECT prepare: %s\n", sqlite3_errmsg(db));
+ abort();
+ }
+ for ( ;; ) {
+ ret = sqlite3_step(stmt);
+ if (ret == SQLITE_ROW) {
+ Player p;
+ p.player_id = sqlite3_column_int(stmt, 0);
+ p.number = (const char *)sqlite3_column_text(stmt, 1);
+ p.name = (const char *) sqlite3_column_text(stmt, 2);
+ players[p.player_id] = move(p);
+ } else if (ret == SQLITE_DONE) {
+ break;
+ } else {
+ fprintf(stderr, "SELECT step: %s\n", sqlite3_errmsg(db));
+ abort();
+ }
+ }
+ ret = sqlite3_finalize(stmt);
+ if (ret != SQLITE_OK) {
+ fprintf(stderr, "SELECT finalize: %s\n", sqlite3_errmsg(db));
+ abort();
+ }
+
+ // Read the events.
+ ret = sqlite3_prepare_v2(db, "SELECT t, player, type FROM event", -1, &stmt, 0);
+ if (ret != SQLITE_OK) {
+ fprintf(stderr, "SELECT prepare: %s\n", sqlite3_errmsg(db));
+ abort();
+ }
+ for ( ;; ) {
+ ret = sqlite3_step(stmt);
+ if (ret == SQLITE_ROW) {
+ Event e;
+ e.t = sqlite3_column_int(stmt, 0);
+ e.player_id = sqlite3_column_int(stmt, 1);
+ e.type = (const char *)sqlite3_column_text(stmt, 2);
+ events.push_back(move(e));
+ } else if (ret == SQLITE_DONE) {
+ break;
+ } else {
+ fprintf(stderr, "SELECT step: %s\n", sqlite3_errmsg(db));
+ abort();
+ }
+ }
+ ret = sqlite3_finalize(stmt);
+ if (ret != SQLITE_OK) {
+ fprintf(stderr, "SELECT finalize: %s\n", sqlite3_errmsg(db));
+ abort();
+ }
+
+ // TODO what if data changes externally?
+ //emit dataChanged(QModelIndex(
+}
+