Function ScanModRows

engine/Poseidon/UI/OptionsUIApp.cpp:1259–1296

Build the catalog rows from the mods actually on disk: local mods (source=Local) from LocalModsRoot() + downloaded mods (source=Workshop) from WorkshopModsRoot(). A mod whose @ is in the current mod path (ModSystem::GetModList) is Active+ticked, else Downloaded+unticked. The remote catalog is merged on top later (MergeWorkshopMods) for not-yet-downloaded workshop mods.

// Build the catalog rows from the mods actually on disk: local mods (source=Local)
// from LocalModsRoot() + downloaded mods (source=Workshop) from WorkshopModsRoot().
// A mod whose @<folder> is in the current mod path (ModSystem::GetModList) is
// Active+ticked, else Downloaded+unticked. The remote catalog is merged on top
// later (MergeWorkshopMods) for not-yet-downloaded workshop mods.
static AutoArray<ModRow> ScanModRows()
{
    AutoArray<ModRow> rows;

    std::set<std::string> active; // lowercased "@folder" basenames currently mounted
    std::istringstream ss(std::string((const char*)Poseidon::ModSystem::GetModList()));
    std::string seg;
    while (std::getline(ss, seg, ';'))
    {
        if (seg.empty())
            continue;
        active.insert(LowerStr(std::filesystem::path(seg).filename().string()));
    }

    std::set<std::string> seen; // lowercased catalog modId/folder id, so both roots list once
    auto scan = [&](const std::string& root, ModRowSource source)
    {
        for (const ScannedMod& sm : ScanLocalMods(root))
        {
            if (!seen.insert(LowerStr(sm.modId)).second)
                continue;
            ModRow r;
            r.modId = sm.modId.c_str();
            r.folderName = sm.folderName.c_str();
            r.name = sm.name.c_str();
            r.version = sm.version.c_str();
            r.sizeBytes = sm.sizeBytes;
            r.source = source;
            const bool isActive = active.count(LowerStr(sm.folderName)) > 0;
            r.state = isActive ? ModRowState::Active : ModRowState::Downloaded;
            r.checked = isActive;
            rows.Add(r);
        }
    };
    scan(LocalModsRoot(), ModRowSource::Local);
    scan(WorkshopModsRoot(), ModRowSource::Workshop);
    return rows;