1import { NativeModules } from 'react-native';
2
3import { ProxyNativeModule } from './NativeModulesProxy.types';
4
5const NativeProxy = NativeModules.NativeUnimoduleProxy;
6const modulesConstantsKey = 'modulesConstants';
7const exportedMethodsKey = 'exportedMethods';
8
9const NativeModulesProxy: { [moduleName: string]: ProxyNativeModule } = {};
10
11if (NativeProxy) {
12  Object.keys(NativeProxy[exportedMethodsKey]).forEach((moduleName) => {
13    NativeModulesProxy[moduleName] = NativeProxy[modulesConstantsKey][moduleName] || {};
14    NativeProxy[exportedMethodsKey][moduleName].forEach((methodInfo) => {
15      NativeModulesProxy[moduleName][methodInfo.name] = (...args: unknown[]): Promise<any> => {
16        const { key, argumentsCount } = methodInfo;
17        if (argumentsCount !== args.length) {
18          return Promise.reject(
19            new Error(
20              `Native method ${moduleName}.${methodInfo.name} expects ${argumentsCount} ${
21                argumentsCount === 1 ? 'argument' : 'arguments'
22              } but received ${args.length}`
23            )
24          );
25        }
26        return NativeProxy.callMethod(moduleName, key, args);
27      };
28    });
29
30    // These are called by EventEmitter (which is a wrapper for NativeEventEmitter)
31    // only on iOS and they use iOS-specific native module, EXReactNativeEventEmitter.
32    //
33    // On Android only {start,stop}Observing are called on the native module
34    // and these should be exported as Expo methods.
35    NativeModulesProxy[moduleName].addListener = (...args) =>
36      NativeModules.EXReactNativeEventEmitter.addProxiedListener(moduleName, ...args);
37    NativeModulesProxy[moduleName].removeListeners = (...args) =>
38      NativeModules.EXReactNativeEventEmitter.removeProxiedListeners(moduleName, ...args);
39  });
40} else {
41  console.warn(
42    `The "UMNativeModulesProxy" native module is not exported through NativeModules; verify that @unimodules/react-native-adapter's native code is linked properly`
43  );
44}
45
46export default NativeModulesProxy;
47