@bung87/grpc-promise-ts/dist/index.es.js

Type safe GRPC with a modern API

(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@grpc/grpc-js')) :
  typeof define === 'function' && define.amd ? define(['exports', '@grpc/grpc-js'], factory) :
  (global = global || self, factory(global['grpc-promise-ts'] = {}, global.grpcJs));
}(this, (function (exports, grpcJs) { 'use strict';

  const promisfyUnaryRpc = (rpc, client) => {
      const originalRpc = rpc;
      return (request, metadata = new grpcJs.Metadata(), options = {}) => {
          let unaryCall;
          const result = new Promise((resolve, reject) => {
              unaryCall = originalRpc.call(client, request, metadata, options, (e, r) => {
                  if (e) {
                      reject(e);
                      return;
                  }
                  resolve(r);
              });
          });
          result.getUnaryCall = () => unaryCall;
          return result;
      };
  };

  var RpcType;
  (function (RpcType) {
      RpcType[RpcType["UNARY"] = 0] = "UNARY";
      RpcType[RpcType["SERVER_STREAMING"] = 1] = "SERVER_STREAMING";
      RpcType[RpcType["CLIENT_STREAMING"] = 2] = "CLIENT_STREAMING";
      RpcType[RpcType["BIDIRECTIONAL"] = 3] = "BIDIRECTIONAL";
  })(RpcType || (RpcType = {}));
  /**
   * Creates a gRPC client which extends the grpc.Client input
   * by changing the RPC implemenations to return a promise instead of using
   * a callback to get the response.
   *
   * This function has no side effects (it doesn't modify the RPC passed in).
   */
  const convertToPromiseClient = function (client) {
      const result = Object.create(client);
      Object.keys(Object.getPrototypeOf(client)).forEach((methodName) => {
          const methodDefinition = client[methodName];
          if (methodDefinition.requestStream === undefined &&
              methodDefinition.responseStream === undefined) {
              // actual grpc methods will have both of these populated
              return;
          }
          let rpcType;
          switch (methodDefinition.requestStream) {
              case true:
                  switch (methodDefinition.responseStream) {
                      case true:
                          rpcType = RpcType.BIDIRECTIONAL;
                          break;
                      case false:
                          rpcType = RpcType.CLIENT_STREAMING;
                          break;
                  }
                  break;
              case false:
                  switch (methodDefinition.responseStream) {
                      case true:
                          rpcType = RpcType.SERVER_STREAMING;
                          break;
                      case false:
                          rpcType = RpcType.UNARY;
                          break;
                  }
                  break;
              default:
                  throw new Error("unreachable");
          }
          switch (rpcType) {
              case RpcType.UNARY:
                  result[methodName] = promisfyUnaryRpc(methodDefinition, client);
                  break;
              case RpcType.BIDIRECTIONAL:
                  result[methodName] = (metadata = new grpcJs.Metadata(), options = {}) => methodDefinition.call(client, metadata, options);
                  break;
              default:
                  throw new Error("Readable/Writeable streams not yet implememnted");
          }
      });
      return result;
  };

  const convertToPromiseClient$1 = convertToPromiseClient;

  exports.convertToPromiseClient = convertToPromiseClient$1;
  exports.promisfyUnaryRpc = promisfyUnaryRpc;

  Object.defineProperty(exports, '__esModule', { value: true });

})));
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"file":"index.es.js","sources":["../src/lib/unary.ts","../src/lib/convertToPromiseClient.ts","../src/index.ts"],"sourcesContent":["import {\n  CallOptions,\n  Client,\n  ClientUnaryCall,\n  Metadata,\n  MethodDefinition,\n} from \"@grpc/grpc-js\";\n\nexport interface TUnaryResult<TResponse> extends Promise<TResponse> {\n  // this promise will reject with a grpc.ServiceError\n  getUnaryCall: () => ClientUnaryCall;\n}\n\nexport type TUnaryRpc<TRequest, TResponse> = (\n  request: TRequest,\n  metadata?: Metadata,\n  options?: Partial<CallOptions>\n) => TUnaryResult<TResponse>;\n\nexport const promisfyUnaryRpc = <TRequest, TResponse>(\n  rpc: MethodDefinition<TRequest, TResponse> & Function,\n  client: Client\n): TUnaryRpc<TRequest, TResponse> => {\n  const originalRpc = rpc;\n  return <TRequest, TResponse>(\n    request: TRequest,\n    metadata: Metadata = new Metadata(),\n    options: Partial<CallOptions> = {}\n  ) => {\n    let unaryCall: ClientUnaryCall;\n    const result: Partial<TUnaryResult<TResponse>> = new Promise<TResponse>(\n      (resolve, reject) => {\n        unaryCall = originalRpc.call(\n          client,\n          request,\n          metadata,\n          options,\n          (e, r) => {\n            if (e) {\n              reject(e);\n              return;\n            }\n            resolve(r);\n          }\n        );\n      }\n    );\n\n    result.getUnaryCall = () => unaryCall;\n    return result as TUnaryResult<TResponse>;\n  };\n};\n","import {\n  CallOptions,\n  Client,\n  ClientDuplexStream,\n  Metadata,\n  MethodDefinition,\n} from \"@grpc/grpc-js\";\n\nimport { promisfyUnaryRpc } from \"./unary\";\n\nenum RpcType {\n  UNARY,\n  SERVER_STREAMING,\n  CLIENT_STREAMING,\n  BIDIRECTIONAL,\n}\n\n/**\n * Creates a gRPC client which extends the grpc.Client input\n * by changing the RPC implemenations to return a promise instead of using\n * a callback to get the response.\n *\n * This function has no side effects (it doesn't modify the RPC passed in).\n */\nconst convertToPromiseClient = function <TPromiseClient extends Client>(\n  client: Client\n): TPromiseClient {\n  const result = Object.create(client) as TPromiseClient;\n  Object.keys(Object.getPrototypeOf(client)).forEach(\n    <TRequest, TResponse>(methodName) => {\n      const methodDefinition: MethodDefinition<TRequest, TResponse> & Function =\n        client[methodName];\n      if (\n        methodDefinition.requestStream === undefined &&\n        methodDefinition.responseStream === undefined\n      ) {\n        // actual grpc methods will have both of these populated\n        return;\n      }\n\n      let rpcType: RpcType;\n      switch (methodDefinition.requestStream) {\n        case true:\n          switch (methodDefinition.responseStream) {\n            case true:\n              rpcType = RpcType.BIDIRECTIONAL;\n              break;\n            case false:\n              rpcType = RpcType.CLIENT_STREAMING;\n              break;\n          }\n          break;\n        case false:\n          switch (methodDefinition.responseStream) {\n            case true:\n              rpcType = RpcType.SERVER_STREAMING;\n              break;\n            case false:\n              rpcType = RpcType.UNARY;\n              break;\n          }\n          break;\n        default:\n          throw new Error(\"unreachable\");\n      }\n\n      switch (rpcType) {\n        case RpcType.UNARY:\n          result[methodName] = promisfyUnaryRpc(methodDefinition, client);\n          break;\n        case RpcType.BIDIRECTIONAL:\n          result[methodName] = <TRequest, TResponse>(\n            metadata: Metadata = new Metadata(),\n            options: Partial<CallOptions> = {}\n          ): ClientDuplexStream<TRequest, TResponse> =>\n            methodDefinition.call(client, metadata, options);\n          break;\n        default:\n          throw new Error(\"Readable/Writeable streams not yet implememnted\");\n      }\n    }\n  );\n  return result;\n};\n\nexport default convertToPromiseClient;\n","export * from \"./lib/unary\";\n\nimport _convertToPromiseClient from \"./lib/convertToPromiseClient\";\n\nexport const convertToPromiseClient = 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