Method fromJson

src/engine/Engine.cpp:1277–1365

void Engine::fromJson(json_t* rootJ) {
	clear();

	// modules
	// We can't instantiate modules before clearing because some modules add ParamHandles upon construction.
	// We also can't lock while instantiating modules because they call addParamHandle() which locks.
	std::vector<Module*> modules;
	json_t* modulesJ = json_object_get(rootJ, "modules");
	if (!modulesJ)
		return;
	size_t moduleIndex;
	json_t* moduleJ;
	json_array_foreach(modulesJ, moduleIndex, moduleJ) {
		// Get model
		plugin::Model* model;
		try {
			model = plugin::modelFromJson(moduleJ);
		}
		catch (Exception& e) {
			WARN("Cannot load model: %s", e.what());
			continue;
		}

		// Create module
		INFO("Creating module %s", model->getFullName().c_str());
		Module* module = model->createModule();
		assert(module);

		try {
			module->fromJson(moduleJ);

			// Before 1.0, the module ID was the index in the "modules" array
			if (module->id < 0) {
				module->id = moduleIndex;
			}
		}
		catch (Exception& e) {
			WARN("Cannot load module: %s", e.what());
			delete module;
			continue;
		}

		modules.push_back(module);
	}

	std::lock_guard<SharedMutex> lock(internal->mutex);

	// Add modules
	for (Module* module : modules) {
		addModule_NoLock(module);
	}

	// cables
	json_t* cablesJ = json_object_get(rootJ, "cables");
	// Before 1.0, cables were called wires
	if (!cablesJ)
		cablesJ = json_object_get(rootJ, "wires");
	if (!cablesJ)