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‎packages/react-native-node-api-modules/cpp/AddonLoaders.hpp‎

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#pragma once
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#include <assert.h>
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#if defined(__APPLE__) || defined(__ANDROID__)
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#include <dlfcn.h>
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#include <stdio.h>
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struct PosixLoader {
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using Module = void *;
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using Symbol = void *;
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static Module loadLibrary(const char *filePath) {
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assert(NULL != filePath);
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Module result = dlopen(filePath, RTLD_NOW | RTLD_LOCAL);
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if (NULL == result) {
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fprintf(stderr, "NapiHost: Failed to load library '%s': %s", filePath,
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dlerror());
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}
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return result;
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}
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static Symbol getSymbol(Module library, const char *name) {
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assert(NULL != library);
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assert(NULL != name);
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Symbol result = dlsym(library, name);
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// if (NULL == result) {
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// NSLog(@"NapiHost: Cannot find '%s' symbol!", name);
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// }
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return result;
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}
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static void unloadLibrary(Module library) {
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if (NULL != library) {
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dlclose(library);
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}
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}
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};
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#endif
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#if defined(_WIN32)
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struct Win32Loader {
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using Module = HMODULE;
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using Symbol = void *;
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static Module loadLibrary(const char *filePath) {
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assert(NULL != filePath);
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Module result = LoadLibrary(filePath);
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if (NULL == result) {
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// TODO: Handle the error case... call GetLastError() that gives us error
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// code as DWORD
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}
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return result;
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}
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static Symbol getSymbol(Module library, const char *name) {
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assert(NULL != library);
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assert(NULL != name);
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Symbol result = GetProcAddress(library, name);
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if (NULL == result) {
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// TODO: Handle the error case... call GetLastError() that gives us error
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// code as DWORD
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}
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return result;
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}
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static void unloadLibrary(Module library) {
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if (NULL != library) {
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FreeLibrary(library);
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}
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}
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};
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struct WinRTLoader {
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using Module = HMODULE;
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using Symbol = void *;
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static Module loadLibrary(const char *filePath) {
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assert(NULL != filePath);
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Module result = LoadPackagedLibrary(filePath);
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if (NULL == result) {
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// TODO: Handle the error case... call GetLastError() that gives us error
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// code as DWORD
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}
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return result;
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}
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static Symbol getSymbol(Module library, const char *name) {
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assert(NULL != library);
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assert(NULL != name);
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Symbol result = GetProcAddress(library, name);
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if (NULL == result) {
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// TODO: Handle the error case... call GetLastError() that gives us error
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// code as DWORD
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}
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return result;
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}
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static void unloadLibrary(Module library) {
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if (NULL != library) {
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FreeLibrary(library);
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}
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}
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};
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#endif

‎packages/react-native-node-api-modules/cpp/CxxNodeApiHostModule.cpp‎

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#include "CxxNodeApiHostModule.hpp"
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using namespace facebook;
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extern napi_status
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hermes_create_napi_env(::hermes::vm::Runtime &runtime, bool isInspectable,
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std::shared_ptr<jsi::PreparedScriptStore> scriptCache,
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const ::hermes::vm::RuntimeConfig &runtimeConfig,
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napi_env *env);
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namespace callstack::nodeapihost {
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CxxNodeApiHostModule::CxxNodeApiHostModule(
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std::shared_ptr<react::CallInvoker> jsInvoker)
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: TurboModule(CxxNodeApiHostModule::kModuleName, jsInvoker) {
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methodMap_["requireNodeAddon"] =
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MethodMetadata{1, &CxxNodeApiHostModule::requireNodeAddon};
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}
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jsi::Value
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CxxNodeApiHostModule::requireNodeAddon(jsi::Runtime &rt,
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react::TurboModule &turboModule,
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const jsi::Value args[], size_t count) {
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auto &thisModule = static_cast<CxxNodeApiHostModule &>(turboModule);
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if (1 == count && args[0].isString()) {
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return thisModule.requireNodeAddon(rt, args[0].asString(rt));
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}
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return jsi::Value::undefined();
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}
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jsi::Value CxxNodeApiHostModule::requireNodeAddon(jsi::Runtime &rt,
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const jsi::String path) {
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const std::string pathStr = path.utf8(rt);
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// Check if this module has been loaded already, if not then load it...
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if (nodeAddons_.end() == nodeAddons_.find(pathStr)) {
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NodeAddon &addon = nodeAddons_[pathStr];
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if (!loadNodeAddon(addon, pathStr)) {
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return jsi::Value::undefined();
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}
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}
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// Library has been loaded, make sure that the "exports" was populated.
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// If not, then just call the "napi_register_module_v1" function...
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NodeAddon &addon = nodeAddons_[pathStr];
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if (NULL == addon.cachedExports) {
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if (!initializeNodeModule(napiEnv_, addon)) {
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return jsi::Value::undefined();
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}
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}
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// Look the exports up (using JSI) and return it...
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return rt.global().getProperty(rt, addon.generatedName.data());
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}
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bool CxxNodeApiHostModule::loadNodeAddon(NodeAddon &addon,
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const std::string &path) const {
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typename LoaderPolicy::Symbol registratorFn = NULL;
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typename LoaderPolicy::Module library =
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LoaderPolicy::loadLibrary(path.c_str());
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if (NULL != library) {
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addon.moduleHandle = library;
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registratorFn = LoaderPolicy::getSymbol(library, "napi_register_module_v1");
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if (NULL != registratorFn) {
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addon.registerFn = (napi_addon_register_func)registratorFn;
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}
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}
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return NULL != registratorFn;
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}
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bool CxxNodeApiHostModule::initializeNodeModule(jsi::Runtime &rt,
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NodeAddon &addon) {
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// We should check if the module has already been registered
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assert(NULL != addon.moduleHandle);
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assert(NULL != addon.registerFn);
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napi_status status = napi_ok;
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napi_value &exports = addon.cachedExports;
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// Create the "exports" object
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status = napi_create_object(napiEnv_, &exports);
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if (napi_ok != status) {
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return false;
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}
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// Call the addon registration function to populate the "exports" object
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addon.registerFn(napiEnv_, exports);
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// Instead of using random numbers to avoid name clashes, we just use the
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// pointer address of the loaded module
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addon.generatedName.resize(32, '\0');
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snprintf(addon.generatedName.data(), addon.generatedName.size(),
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"RN$NodeAddon_%lX", (uintptr_t)addon.moduleHandle);
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napi_value global;
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napi_get_global(napiEnv_, &global);
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napi_set_named_property(napiEnv_, global, addon.generatedName.data(),
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addon.cachedExports);
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return true;
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}
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} // namespace callstack::nodeapihost

‎packages/react-native-node-api-modules/cpp/CxxNodeApiHostModule.hpp‎

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#pragma once
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#include <ReactCommon/TurboModule.h>
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#include <jsi/jsi.h>
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#include <node_api.h>
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#include "AddonLoaders.hpp"
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namespace callstack::nodeapihost {
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class JSI_EXPORT CxxNodeApiHostModule : public facebook::react::TurboModule {
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public:
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static constexpr std::string kModuleName = "NodeApiHost";
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CxxNodeApiHostModule(std::shared_ptr<facebook::react::CallInvoker> jsInvoker);
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static facebook::jsi::Value
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requireNodeAddon(facebook::jsi::Runtime &rt,
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facebook::react::TurboModule &turboModule,
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const facebook::jsi::Value args[], size_t count);
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facebook::jsi::Value requireNodeAddon(facebook::jsi::Runtime &rt,
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const facebook::jsi::String path);
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protected:
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struct NodeAddon {
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void *moduleHandle;
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napi_addon_register_func registerFn;
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napi_value cachedExports;
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std::string generatedName;
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};
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std::unordered_map<std::string, NodeAddon> nodeAddons_;
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napi_env napiEnv_{};
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using LoaderPolicy = PosixLoader; // FIXME: HACK: This is temporary workaround
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// for my lazyness (work on iOS and Android)
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bool loadNodeAddon(NodeAddon &addon, const std::string &path) const;
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bool initializeNodeModule(facebook::jsi::Runtime &rt, NodeAddon &addon);
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};
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} // namespace callstack::nodeapihost

‎packages/react-native-node-api-modules/ios/NodeApiHostModuleProvider.mm‎

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#import "CxxNodeApiHostModule.hpp"
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#define USE_CXX_TURBO_MODULE_UTILS 0
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#if defined(__has_include)
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#if __has_include(<ReactCommon/CxxTurboModuleUtils.h>)
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#undef USE_CXX_TURBO_MODULE_UTILS
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#define USE_CXX_TURBO_MODULE_UTILS 1
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#endif
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#endif
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#if USE_CXX_TURBO_MODULE_UTILS
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#import <ReactCommon/CxxTurboModuleUtils.h>
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@interface NodeApiHost : NSObject
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#else
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#import <ReactCommon/RCTTurboModule.h>
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@interface NodeApiHost : NSObject <RCTBridgeModule, RCTTurboModule>
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#endif // USE_CXX_TURBO_MODULE_UTILS
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@end
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@implementation NodeApiHost
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#if USE_CXX_TURBO_MODULE_UTILS
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+ (void)load {
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facebook::react::registerCxxModuleToGlobalModuleMap(
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callstack::nodeapihost::CxxNodeApiHostModule::kModuleName,
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[](std::shared_ptr<facebook::react::CallInvoker> jsInvoker) {
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return std::make_shared<callstack::nodeapihost::CxxNodeApiHostModule>(
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jsInvoker);
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});
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}
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#else
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RCT_EXPORT_MODULE()
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- (std::shared_ptr<facebook::react::TurboModule>)getTurboModule:
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(const facebook::react::ObjCTurboModule::InitParams &)params {
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return std::make_shared<callstack::nodeapihost::CxxNodeApiHostModule>(
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params.jsInvoker);
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}
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#endif // USE_CXX_TURBO_MODULE_UTILS
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@end

‎packages/react-native-node-api-modules/package.json‎

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},
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"peerDependencies": {
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"react-native": "0.79.1"
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},
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"codegenConfig": {
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"name": "NodeApiHostSpec",
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"type": "modules",
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"jsSrcsDir": "src/host",
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"outputDir": {
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"ios": "ios/generated",
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"android": "android/generated"
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}
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}
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}

‎packages/react-native-node-api-modules/src/host/NativeNodeApiHost.ts‎

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import type { TurboModule } from "react-native";
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import { TurboModuleRegistry } from "react-native";
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export interface Spec extends TurboModule {
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requireNodeAddon(path: string): void;
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}
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export default TurboModuleRegistry.getEnforcing<Spec>("NodeApiHost");

‎packages/react-native-node-api-modules/tsconfig.react-native.json‎

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"noEmit": false,
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"outDir": "dist",
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"rootDir": "src",
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"types": ["react-native"],
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"types": ["react-native"]
1010
},
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"include": ["src/index.ts"]
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}
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"include": ["src/index.ts", "src/host"]
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}

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