encode() [2/2]

bool MayaFlux::Nexus::StateEncoder::encode	(	const Tapestry &	tapestry,
		const std::string &	base_dir,
		nlohmann::json	user_state = {}
	)

Encode all Fabrics in tapestry to base_dir.

Writes one EXR+JSON pair per Fabric under base_dir/{fabric_name_or_id}, then writes base_dir/tapestry.json as the envelope.

Parameters

tapestry	Source Tapestry.
base_dir	Directory path. Must exist.

Returns

True on success.

Definition at line 526 of file Encoder.cpp.

{
    m_last_error.clear();
 
    State::TapestrySchema schema;
 
    std::unordered_set<const Expanse*> tapestry_owned;
    for (const auto& [xname, xptr] : tapestry.all_expanses()) {
        tapestry_owned.insert(xptr.get());
    }
 
    for (const auto& fabric : tapestry.all_fabrics()) {
        const std::string fabric_id = fabric->name().empty()
            ? std::to_string(fabric->id())
            : fabric->name();
 
        const std::string base_path = base_dir + "/" + fabric_id;
 
        if (!encode_fabric(*fabric, base_path, tapestry_owned)) {
            return false;
        }
 
        schema.fabrics.push_back(State::FabricRef {
            .name = fabric_id,
            .base_path = base_path,
        });
    }
 
    for (const auto& [xname, xptr] : tapestry.all_expanses()) {
        State::TapestryExpanseRecord xrec { .name = xname };
        fill_expanse(xrec, *xptr);
        for (const auto& fabric : tapestry.all_fabrics()) {
            for (uint32_t xid : fabric->all_expanse_ids()) {
                if (fabric->get_expanse(xid) == xptr) {
                    const std::string fname = fabric->name().empty()
                        ? std::to_string(fabric->id())
                        : fabric->name();
                    xrec.fabric_names.push_back(fname);
                    break;
                }
            }
        }
        schema.expanses.push_back(std::move(xrec));
    }
 
    schema.user_state = std::move(user_state);
 
    IO::JSONSerializer ser;
    const std::string tapestry_path = base_dir + "/tapestry.json";
    if (!ser.write(tapestry_path, schema)) {
        m_last_error = "Failed to write tapestry schema: " + ser.last_error();
        MF_ERROR(Journal::Component::Nexus, Journal::Context::FileIO, m_last_error);
        return false;
    }
 
    MF_INFO(Journal::Component::Nexus, Journal::Context::FileIO,
        "StateEncoder: wrote {} fabrics to {}", schema.fabrics.size(), tapestry_path);
    return true;
}

References MayaFlux::Nexus::Tapestry::all_expanses(), MayaFlux::Nexus::Tapestry::all_fabrics(), MayaFlux::Nexus::State::TapestrySchema::expanses, MayaFlux::Nexus::State::TapestrySchema::fabrics, MayaFlux::Journal::FileIO, MayaFlux::IO::JSONSerializer::last_error(), MF_ERROR, MF_INFO, MayaFlux::Nexus::State::FabricRef::name, MayaFlux::Nexus::State::TapestryExpanseRecord::name, MayaFlux::Journal::Nexus, MayaFlux::Nexus::State::TapestrySchema::user_state, and MayaFlux::IO::JSONSerializer::write().

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