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main.ts
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import { code, Code, conditionalOutput, def, imp, joinCode } from "ts-poet";
import { ConditionalOutput } from "ts-poet/build/ConditionalOutput";
import {
DescriptorProto,
FieldDescriptorProto,
FieldDescriptorProto_Label,
FieldDescriptorProto_Type,
FieldOptions_JSType,
FileDescriptorProto,
} from "ts-proto-descriptors";
import { camelToSnake, capitalize, maybeSnakeToCamel } from "./case";
import { Context } from "./context";
import { generateEnum } from "./enums";
import { generateDecodeTransform, generateEncodeTransform } from "./generate-async-iterable";
import { generateGenericServiceDefinition } from "./generate-generic-service-definition";
import { generateGrpcJsService } from "./generate-grpc-js";
import {
addGrpcWebMisc,
generateGrpcClientImpl,
generateGrpcMethodDesc,
generateGrpcServiceDesc,
} from "./generate-grpc-web";
import {
generateNestjsGrpcServiceMethodsDecorator,
generateNestjsServiceClient,
generateNestjsServiceController,
} from "./generate-nestjs";
import { generateNiceGrpcService } from "./generate-nice-grpc";
import {
generateDataLoaderOptionsType,
generateDataLoadersType,
generateRpcType,
generateService,
generateServiceClientImpl,
} from "./generate-services";
import {
generateUnwrapDeep,
generateUnwrapShallow,
generateWrapDeep,
generateWrapShallow,
isWrapperType,
} from "./generate-struct-wrappers";
import {
addTypeToMessages,
DateOption,
DurationOption,
EnvOption,
JsonTimestampOption,
LongOption,
OneofOption,
Options,
ServiceOption,
} from "./options";
import { generateSchema } from "./schema";
import SourceInfo, { Fields } from "./sourceInfo";
import {
basicLongWireType,
basicTypeName,
basicWireType,
defaultValue,
detectMapType,
getEnumMethod,
getFieldOptionsJsType,
isAnyValueType,
isAnyValueTypeName,
isBytes,
isBytesValueType,
isEnum,
isFieldMaskType,
isFieldMaskTypeName,
isJsTypeFieldOption,
isListValueType,
isListValueTypeName,
isLong,
isLongValueType,
isMapType,
isMessage,
isObjectId,
isOptionalProperty,
isPrimitive,
isRepeated,
isScalar,
isStructType,
isStructTypeName,
isTimestamp,
isValueType,
isWholeNumber,
isWithinOneOf,
isWithinOneOfThatShouldBeUnion,
notDefaultCheck,
packedType,
shouldGenerateJSMapType,
toReaderCall,
toTypeName,
valueTypeName,
} from "./types";
import {
assertInstanceOf,
FormattedMethodDescriptor,
getFieldJsonName,
getFieldName,
getPropertyAccessor,
impFile,
impProto,
maybeAddComment,
maybePrefixPackage,
nullOrUndefined,
oneofValueName,
safeAccessor,
withAndMaybeCheckIsNotNull,
withOrMaybeCheckIsNotNull,
withOrMaybeCheckIsNull,
wrapTypeName,
} from "./utils";
import { visit, visitServices } from "./visit";
export function generateFile(ctx: Context, fileDesc: FileDescriptorProto): [string, Code] {
const { options, utils } = ctx;
if (options.useOptionals === false) {
console.warn(
"ts-proto: Passing useOptionals as a boolean option is deprecated and will be removed in a future version. Please pass the string 'none' instead of false.",
);
options.useOptionals = "none";
} else if (options.useOptionals === true) {
console.warn(
"ts-proto: Passing useOptionals as a boolean option is deprecated and will be removed in a future version. Please pass the string 'messages' instead of true.",
);
options.useOptionals = "messages";
}
// Google's protofiles are organized like Java, where package == the folder the file
// is in, and file == a specific service within the package. I.e. you can have multiple
// company/foo.proto and company/bar.proto files, where package would be 'company'.
//
// We'll match that structure by setting up the module path as:
//
// company/foo.proto --> company/foo.ts
// company/bar.proto --> company/bar.ts
//
// We'll also assume that the fileDesc.name is already the `company/foo.proto` path, with
// the package already implicitly in it, so we won't re-append/strip/etc. it out/back in.
const suffix = `${options.fileSuffix}.ts`;
const moduleName = fileDesc.name.replace(".proto", suffix);
const chunks: Code[] = [];
// Indicate this file's source protobuf package for reflective use with google.protobuf.Any
if (options.exportCommonSymbols) {
chunks.push(code`export const protobufPackage = '${fileDesc.package}';`);
}
// Syntax, unlike most fields, is not repeated and thus does not use an index
const sourceInfo = SourceInfo.fromDescriptor(fileDesc);
const headerComment = sourceInfo.lookup(Fields.file.syntax, undefined);
maybeAddComment(options, headerComment, chunks, fileDesc.options?.deprecated);
// Apply formatting to methods here, so they propagate globally
for (let svc of fileDesc.service) {
for (let i = 0; i < svc.method.length; i++) {
svc.method[i] = new FormattedMethodDescriptor(svc.method[i], options);
}
}
// first make all the type declarations
visit(
fileDesc,
sourceInfo,
(fullName, message, sInfo, fullProtoTypeName) => {
chunks.push(
generateInterfaceDeclaration(ctx, fullName, message, sInfo, maybePrefixPackage(fileDesc, fullProtoTypeName)),
);
},
options,
(fullName, enumDesc, sInfo) => {
chunks.push(generateEnum(ctx, fullName, enumDesc, sInfo));
},
);
// If nestJs=true export [package]_PACKAGE_NAME and [service]_SERVICE_NAME const
if (options.nestJs) {
if (options.exportCommonSymbols) {
const prefix = camelToSnake(fileDesc.package.replace(/\./g, "_"));
chunks.push(code`export const ${prefix}_PACKAGE_NAME = '${fileDesc.package}';`);
}
if (
options.useDate === DateOption.DATE &&
fileDesc.messageType.find((message) =>
message.field.find((field) => field.typeName === ".google.protobuf.Timestamp"),
)
) {
chunks.push(makeProtobufTimestampWrapper());
}
}
// We add `nestJs` here because enough though it doesn't use our encode/decode methods
// for most/vanilla messages, we do generate static wrap/unwrap methods for the special
// Struct/Value/wrapper types and use the `wrappers[...]` to have NestJS know about them.
if (
options.outputEncodeMethods ||
options.outputJsonMethods ||
options.outputTypeAnnotations ||
options.outputTypeRegistry ||
options.nestJs
) {
// then add the encoder/decoder/base instance
visit(
fileDesc,
sourceInfo,
(fullName, message, _sInfo, fullProtoTypeName) => {
const fullTypeName = maybePrefixPackage(fileDesc, fullProtoTypeName);
const outputWrapAndUnwrap = isWrapperType(fullTypeName);
// Only decode, fromPartial, and wrap use the createBase method
if (
(options.outputEncodeMethods &&
options.outputEncodeMethods !== "encode-no-creation" &&
options.outputEncodeMethods !== "encode-only" &&
(options.outputDecodeIncludeTypes === "" ||
new RegExp(options.outputDecodeIncludeTypes).test(fullTypeName))) ||
options.outputPartialMethods ||
outputWrapAndUnwrap
) {
chunks.push(generateBaseInstanceFactory(ctx, fullName, message, fullTypeName));
}
const staticMembers: Code[] = [];
const hasTypeMember = options.outputTypeAnnotations || options.outputTypeRegistry;
if (hasTypeMember) {
staticMembers.push(code`$type: '${fullTypeName}' as const`);
}
if (options.outputExtensions) {
for (const extension of message.extension) {
const { name, type, extensionInfo } = generateExtension(ctx, message, extension);
staticMembers.push(code`${name}: <${ctx.utils.Extension}<${type}>> ${extensionInfo}`);
}
}
if (options.outputEncodeMethods) {
if (
options.outputEncodeMethods === true ||
options.outputEncodeMethods === "encode-only" ||
options.outputEncodeMethods === "encode-no-creation"
) {
if (
options.outputEncodeIncludeTypes === "" ||
new RegExp(options.outputEncodeIncludeTypes).test(fullTypeName)
) {
staticMembers.push(generateEncode(ctx, fullName, message));
if (options.outputExtensions && options.unknownFields && message.extensionRange.length) {
staticMembers.push(generateSetExtension(ctx, fullName));
}
} else if (options.outputEncodeMethods === true) {
staticMembers.push(generateEmptyEncode(fullName));
}
}
if (options.outputEncodeMethods === true || options.outputEncodeMethods === "decode-only") {
if (
options.outputDecodeIncludeTypes === "" ||
new RegExp(options.outputDecodeIncludeTypes).test(fullTypeName)
) {
staticMembers.push(generateDecode(ctx, fullName, message));
if (options.outputExtensions && options.unknownFields && message.extensionRange.length) {
staticMembers.push(generateGetExtension(ctx, fullName));
}
} else if (options.outputEncodeMethods === true) {
staticMembers.push(generateEmptyDecode(fullName));
}
}
}
if (options.useAsyncIterable) {
staticMembers.push(generateEncodeTransform(ctx.utils, fullName));
staticMembers.push(generateDecodeTransform(ctx.utils, fullName));
}
if (options.outputJsonMethods) {
if (options.outputJsonMethods === true || options.outputJsonMethods === "from-only") {
staticMembers.push(generateFromJson(ctx, fullName, fullTypeName, message));
}
if (options.outputJsonMethods === true || options.outputJsonMethods === "to-only") {
staticMembers.push(generateToJson(ctx, fullName, fullTypeName, message));
}
}
if (options.outputPartialMethods) {
staticMembers.push(generateFromPartial(ctx, fullName, message));
}
const structFieldNames = {
nullValue: maybeSnakeToCamel("null_value", ctx.options),
numberValue: maybeSnakeToCamel("number_value", ctx.options),
stringValue: maybeSnakeToCamel("string_value", ctx.options),
boolValue: maybeSnakeToCamel("bool_value", ctx.options),
structValue: maybeSnakeToCamel("struct_value", ctx.options),
listValue: maybeSnakeToCamel("list_value", ctx.options),
};
if (options.nestJs) {
staticMembers.push(...generateWrapDeep(ctx, fullTypeName, structFieldNames));
staticMembers.push(...generateUnwrapDeep(ctx, fullTypeName, structFieldNames));
} else {
staticMembers.push(...generateWrapShallow(ctx, fullTypeName, structFieldNames));
staticMembers.push(...generateUnwrapShallow(ctx, fullTypeName, structFieldNames));
}
if (staticMembers.length > 0) {
const messageFnsTypeParameters = [fullName, hasTypeMember && `'${fullTypeName}'`]
.filter((p) => !!p)
.join(", ");
const interfaces: Code[] = [code`${utils.MessageFns}<${messageFnsTypeParameters}>`];
if (
options.outputEncodeMethods &&
options.outputExtensions &&
options.unknownFields &&
message.extensionRange.length
) {
interfaces.push(code`${utils.ExtensionFns}<${fullName}>`);
}
if (isStructTypeName(fullTypeName)) {
interfaces.push(code`${utils.StructWrapperFns}`);
} else if (isAnyValueTypeName(fullTypeName)) {
interfaces.push(code`${utils.AnyValueWrapperFns}`);
} else if (isListValueTypeName(fullTypeName)) {
interfaces.push(code`${utils.ListValueWrapperFns}`);
} else if (isFieldMaskTypeName(fullTypeName)) {
interfaces.push(code`${utils.FieldMaskWrapperFns}`);
}
if (options.outputExtensions) {
for (const extension of message.extension) {
const name = maybeSnakeToCamel(extension.name, ctx.options);
const type = toTypeName(ctx, message, extension);
interfaces.push(code`${utils.ExtensionHolder}<"${name}", ${type}>`);
}
}
chunks.push(code`
export const ${def(fullName)}: ${joinCode(interfaces, { on: " & " })} = {
${joinCode(staticMembers, { on: ",\n\n" })}
};
`);
}
if (options.outputTypeRegistry) {
const messageTypeRegistry = impFile(options, "messageTypeRegistry@./typeRegistry");
chunks.push(code`
${messageTypeRegistry}.set(${fullName}.$type, ${fullName});
`);
}
},
options,
);
}
if (options.outputExtensions) {
for (const extension of fileDesc.extension) {
const { name, type, extensionInfo } = generateExtension(ctx, undefined, extension);
chunks.push(code`export const ${name}: ${ctx.utils.Extension}<${type}> = ${extensionInfo};`);
}
}
if (options.nestJs) {
if (fileDesc.messageType.find((message) => message.field.find(isStructType))) {
chunks.push(makeProtobufStructWrapper(options));
}
}
let hasServerStreamingMethods = false;
let hasStreamingMethods = false;
visitServices(fileDesc, sourceInfo, (serviceDesc, sInfo) => {
if (options.nestJs) {
// NestJS is sufficiently different that we special case the client/server interfaces
// generate nestjs grpc client interface
chunks.push(generateNestjsServiceClient(ctx, fileDesc, sInfo, serviceDesc));
// and the service controller interface
chunks.push(generateNestjsServiceController(ctx, fileDesc, sInfo, serviceDesc));
// generate nestjs grpc service controller decorator
chunks.push(generateNestjsGrpcServiceMethodsDecorator(ctx, serviceDesc));
let serviceConstName = `${camelToSnake(serviceDesc.name)}_NAME`;
if (!serviceDesc.name.toLowerCase().endsWith("service")) {
serviceConstName = `${camelToSnake(serviceDesc.name)}_SERVICE_NAME`;
}
chunks.push(code`export const ${serviceConstName} = "${serviceDesc.name}";`);
}
const uniqueServices = [...new Set(options.outputServices)].sort();
uniqueServices.forEach((outputService) => {
if (outputService === ServiceOption.GRPC) {
chunks.push(generateGrpcJsService(ctx, fileDesc, sInfo, serviceDesc));
} else if (outputService === ServiceOption.NICE_GRPC) {
chunks.push(generateNiceGrpcService(ctx, fileDesc, sInfo, serviceDesc));
} else if (outputService === ServiceOption.GENERIC) {
chunks.push(generateGenericServiceDefinition(ctx, fileDesc, sInfo, serviceDesc));
} else if (outputService === ServiceOption.DEFAULT) {
// This service could be Twirp or grpc-web or JSON (maybe). So far all of their
// interfaces are fairly similar so we share the same service interface.
chunks.push(generateService(ctx, fileDesc, sInfo, serviceDesc));
if (options.outputClientImpl === true) {
chunks.push(generateServiceClientImpl(ctx, fileDesc, serviceDesc));
} else if (options.outputClientImpl === "grpc-web") {
chunks.push(generateGrpcClientImpl(ctx, fileDesc, serviceDesc));
chunks.push(generateGrpcServiceDesc(fileDesc, serviceDesc));
serviceDesc.method.forEach((method) => {
if (!method.clientStreaming) {
chunks.push(generateGrpcMethodDesc(ctx, serviceDesc, method));
}
if (method.serverStreaming) {
hasServerStreamingMethods = true;
}
});
}
}
});
serviceDesc.method.forEach((methodDesc, _index) => {
if (methodDesc.serverStreaming || methodDesc.clientStreaming) {
hasStreamingMethods = true;
}
});
});
if (
options.outputServices.includes(ServiceOption.DEFAULT) &&
options.outputClientImpl &&
fileDesc.service.length > 0
) {
if (options.outputClientImpl === true) {
chunks.push(generateRpcType(ctx, hasStreamingMethods));
} else if (options.outputClientImpl === "grpc-web") {
chunks.push(addGrpcWebMisc(ctx, hasServerStreamingMethods));
}
}
if (options.context) {
chunks.push(generateDataLoaderOptionsType());
chunks.push(generateDataLoadersType());
}
if (options.outputSchema) {
chunks.push(...generateSchema(ctx, fileDesc, sourceInfo));
}
// https://www.typescriptlang.org/docs/handbook/2/modules.html:
// > In TypeScript, just as in ECMAScript 2015, any file containing a top-level import or export is considered a module.
// > Conversely, a file without any top-level import or export declarations is treated as a script whose contents are available in the global scope (and therefore to modules as well).
//
// Thus, to mark an empty file a module, we need to add `export {}` to it.
if (options.esModuleInterop && chunks.length === 0) {
chunks.push(code`export {};`);
}
chunks.push(
...Object.values(utils).map((v) => {
if (v instanceof ConditionalOutput) {
return code`${v.ifUsed}`;
} else {
return code``;
}
}),
);
// Finally, reset method definitions to their original state (unformatted)
// This is mainly so that the `meta-typings` tests pass
for (let svc of fileDesc.service) {
for (let i = 0; i < svc.method.length; i++) {
const methodInfo = svc.method[i];
assertInstanceOf(methodInfo, FormattedMethodDescriptor);
svc.method[i] = methodInfo.getSource();
}
}
return [moduleName, joinCode(chunks, { on: "\n\n" })];
}
export type Utils = ReturnType<typeof makeDeepPartial> &
ReturnType<typeof makeObjectIdMethods> &
ReturnType<typeof makeTimestampMethods> &
ReturnType<typeof makeByteUtils> &
ReturnType<typeof makeLongUtils> &
ReturnType<typeof makeComparisonUtils> &
ReturnType<typeof makeNiceGrpcServerStreamingMethodResult> &
ReturnType<typeof makeGrpcWebErrorClass> &
ReturnType<typeof makeExtensionClass> &
ReturnType<typeof makeAssertionUtils> &
ReturnType<typeof makeMessageFns>;
/** These are runtime utility methods used by the generated code. */
export function makeUtils(options: Options): Utils {
const bytes = makeByteUtils(options);
const longs = makeLongUtils(options, bytes);
const deepPartial = makeDeepPartial(options, longs);
const extension = makeExtensionClass(options);
return {
...bytes,
...deepPartial,
...makeObjectIdMethods(),
...makeTimestampMethods(options, longs, bytes),
...longs,
...makeComparisonUtils(),
...makeNiceGrpcServerStreamingMethodResult(options),
...makeGrpcWebErrorClass(bytes),
...extension,
...makeAssertionUtils(bytes),
...makeMessageFns(options, deepPartial, extension),
};
}
function makeProtobufTimestampWrapper() {
const wrappers = imp("wrappers@protobufjs");
return code`
${wrappers}['.google.protobuf.Timestamp'] = {
fromObject(value: Date) {
return {
seconds: value.getTime() / 1000,
nanos: (value.getTime() % 1000) * 1e6,
};
},
toObject(message: { seconds: number; nanos: number }) {
return new Date(message.seconds * 1000 + message.nanos / 1e6);
},
} as any;`;
}
function makeProtobufStructWrapper(options: Options) {
const wrappers = imp("wrappers@protobufjs");
const Struct = impProto(options, "google/protobuf/struct", wrapTypeName(options, "Struct"));
return code`
${wrappers}['.google.protobuf.Struct'] = {
fromObject: ${Struct}.wrap,
toObject: ${Struct}.unwrap,
} as any;`;
}
function makeLongUtils(options: Options, bytes: ReturnType<typeof makeByteUtils>) {
const Long = imp("Long=long");
const numberToLong = conditionalOutput(
"numberToLong",
code`
function numberToLong(number: number) {
return ${Long}.fromNumber(number);
}
`,
);
const longToNumber = conditionalOutput(
"longToNumber",
code`
function longToNumber(int64: { toString(): string }): number {
const num = ${bytes.globalThis}.Number(int64.toString());
if (num > ${bytes.globalThis}.Number.MAX_SAFE_INTEGER) {
throw new ${bytes.globalThis}.Error("Value is larger than Number.MAX_SAFE_INTEGER")
}
if (num < ${bytes.globalThis}.Number.MIN_SAFE_INTEGER) {
throw new ${bytes.globalThis}.Error("Value is smaller than Number.MIN_SAFE_INTEGER")
}
return num;
}
`,
);
return { numberToLong, longToNumber, Long };
}
function makeByteUtils(options: Options) {
const globalThisPolyfill = conditionalOutput(
"gt",
code`
declare const self: any | undefined;
declare const window: any | undefined;
declare const global: any | undefined;
const gt: any = (() => {
if (typeof globalThis !== "undefined") return globalThis;
if (typeof self !== "undefined") return self;
if (typeof window !== "undefined") return window;
if (typeof global !== "undefined") return global;
throw "Unable to locate global object";
})();
`,
);
const globalThis = options.globalThisPolyfill ? globalThisPolyfill : conditionalOutput("globalThis", code``);
function getBytesFromBase64Snippet() {
const bytesFromBase64NodeSnippet = code`
return Uint8Array.from(${globalThis}.Buffer.from(b64, 'base64'));
`;
const bytesFromBase64BrowserSnippet = code`
const bin = ${globalThis}.atob(b64);
const arr = new Uint8Array(bin.length);
for (let i = 0; i < bin.length; ++i) {
arr[i] = bin.charCodeAt(i);
}
return arr;
`;
switch (options.env) {
case EnvOption.NODE:
return bytesFromBase64NodeSnippet;
case EnvOption.BROWSER:
return bytesFromBase64BrowserSnippet;
default:
return code`
if ((${globalThis} as any).Buffer) {
${bytesFromBase64NodeSnippet}
} else {
${bytesFromBase64BrowserSnippet}
}
`;
}
}
const bytesFromBase64 = conditionalOutput(
"bytesFromBase64",
code`
function bytesFromBase64(b64: string): Uint8Array {
${getBytesFromBase64Snippet()}
}
`,
);
function getBase64FromBytesSnippet() {
const base64FromBytesNodeSnippet = code`
return ${globalThis}.Buffer.from(arr).toString('base64');
`;
const base64FromBytesBrowserSnippet = code`
const bin: string[] = [];
arr.forEach((byte) => {
bin.push(${globalThis}.String.fromCharCode(byte));
});
return ${globalThis}.btoa(bin.join(''));
`;
switch (options.env) {
case EnvOption.NODE:
return base64FromBytesNodeSnippet;
case EnvOption.BROWSER:
return base64FromBytesBrowserSnippet;
default:
return code`
if ((${globalThis} as any).Buffer) {
${base64FromBytesNodeSnippet}
} else {
${base64FromBytesBrowserSnippet}
}
`;
}
}
const base64FromBytes = conditionalOutput(
"base64FromBytes",
code`
function base64FromBytes(arr: Uint8Array): string {
${getBase64FromBytesSnippet()}
}
`,
);
return { globalThis, bytesFromBase64, base64FromBytes };
}
function makeDeepPartial(options: Options, longs: ReturnType<typeof makeLongUtils>) {
let oneofCase = "";
if (options.oneof === OneofOption.UNIONS) {
oneofCase = `
: T extends { ${maybeReadonly(options)}$case: string }
? { [K in keyof Omit<T, '$case'>]?: DeepPartial<T[K]> } & { ${maybeReadonly(options)}$case: T['$case'] }
`;
} else if (options.oneof === OneofOption.UNIONS_VALUE) {
oneofCase = `
: T extends { ${maybeReadonly(options)}$case: string; value: unknown; }
? { ${maybeReadonly(options)}$case: T['$case']; value?: DeepPartial<T['value']>; }
`;
}
const maybeExport = options.exportCommonSymbols ? "export" : "";
// Allow passing longs as numbers or strings, nad we'll convert them
const maybeLong =
options.forceLong === LongOption.LONG ? code` : T extends ${longs.Long} ? string | number | Long ` : "";
const Builtin = conditionalOutput(
"Builtin",
code`type Builtin = Date | Function | Uint8Array | string | number | boolean |${
options.forceLong === LongOption.BIGINT ? " bigint |" : ""
} undefined;`,
);
// Based on https://github.com/sindresorhus/type-fest/pull/259
const maybeExcludeType = addTypeToMessages(options) ? `| '$type'` : "";
const Exact = conditionalOutput(
"Exact",
code`
type KeysOfUnion<T> = T extends T ? keyof T : never;
${maybeExport} type Exact<P, I extends P> = P extends ${Builtin}
? P
: P &
{ [K in keyof P]: Exact<P[K], I[K]> } & { [K in Exclude<keyof I, KeysOfUnion<P> ${maybeExcludeType}>]: never };
`,
);
// Based on the type from ts-essentials
const keys = addTypeToMessages(options) ? code`Exclude<keyof T, '$type'>` : code`keyof T`;
const DeepPartial = conditionalOutput(
"DeepPartial",
code`
${maybeExport} type DeepPartial<T> = T extends ${Builtin}
? T
${maybeLong}
: T extends globalThis.Array<infer U>
? globalThis.Array<DeepPartial<U>>
: T extends ReadonlyArray<infer U>
? ReadonlyArray<DeepPartial<U>>${oneofCase}
: T extends {}
? { [K in ${keys}]?: DeepPartial<T[K]> }
: Partial<T>;
`,
);
return { Builtin, DeepPartial, Exact };
}
function makeMessageFns(
options: Options,
deepPartial: ReturnType<typeof makeDeepPartial>,
extension: ReturnType<typeof makeExtensionClass>,
) {
const BinaryWriter = imp("BinaryWriter@@bufbuild/protobuf/wire");
const BinaryReader = imp("BinaryReader@@bufbuild/protobuf/wire");
const { Exact, DeepPartial } = deepPartial;
const { Extension } = extension;
const commonStaticMembers: Code[] = [];
const extensionStaticMembers = [];
const hasTypeMember = options.outputTypeAnnotations || options.outputTypeRegistry;
if (hasTypeMember) {
commonStaticMembers.push(code`readonly $type: V;`);
}
if (options.outputEncodeMethods) {
if (
options.outputEncodeMethods === true ||
options.outputEncodeMethods === "encode-only" ||
options.outputEncodeMethods === "encode-no-creation"
) {
commonStaticMembers.push(code`
encode(message: T, writer?: ${BinaryWriter}): ${BinaryWriter};
`);
if (options.outputExtensions && options.unknownFields) {
extensionStaticMembers.push(code`
setExtension<E>(message: T, extension: ${Extension}<E>, value: E): void;
`);
}
}
if (options.outputEncodeMethods === true || options.outputEncodeMethods === "decode-only") {
commonStaticMembers.push(code`
decode(input: ${BinaryReader} | Uint8Array, length?: number): T;
`);
if (options.outputExtensions && options.unknownFields) {
extensionStaticMembers.push(code`
getExtension<E>(message: T, extension: ${Extension}<E>): E | undefined;
`);
}
}
}
if (options.useAsyncIterable) {
commonStaticMembers.push(code`
encodeTransform(
source: AsyncIterable<T | T[]> | Iterable<T | T[]>
): AsyncIterable<Uint8Array>;
`);
commonStaticMembers.push(code`
decodeTransform(
source: AsyncIterable<Uint8Array | Uint8Array[]> | Iterable<Uint8Array | Uint8Array[]>
): AsyncIterable<T>;
`);
}
if (options.outputJsonMethods) {
if (options.outputJsonMethods === true || options.outputJsonMethods === "from-only") {
commonStaticMembers.push(code`fromJSON(object: any): T;`);
}
if (options.outputJsonMethods === true || options.outputJsonMethods === "to-only") {
commonStaticMembers.push(code`toJSON(message: T): unknown;`);
}
}
if (options.outputPartialMethods) {
if (options.useExactTypes) {
commonStaticMembers.push(code`create<I extends ${Exact}<${DeepPartial}<T>, I>>(base?: I): T;`);
commonStaticMembers.push(code`fromPartial<I extends ${Exact}<${DeepPartial}<T>, I>>(object: I): T;`);
} else {
commonStaticMembers.push(code`create(base?: DeepPartial<T>): T;`);
commonStaticMembers.push(code`fromPartial(object: DeepPartial<T>): T;`);
}
}
const maybeExport = options.exportCommonSymbols ? "export" : "";
const MessageFns = conditionalOutput(
"MessageFns",
code`
${maybeExport} interface MessageFns<T${hasTypeMember ? ", V extends string" : ""}> {
${joinCode(commonStaticMembers, { on: "\n" })}
}
`,
);
const ExtensionFns = conditionalOutput(
"ExtensionFns",
code`
${maybeExport} interface ExtensionFns<T> {
${joinCode(extensionStaticMembers, { on: "\n" })}
}
`,
);
const ExtensionHolder = conditionalOutput(
"ExtensionHolder",
code`
${maybeExport} type ExtensionHolder<T extends string, V> = {
[key in T]: Extension<V>;
}
`,
);
const StructWrapperFns = conditionalOutput(
"StructWrapperFns",
code`
${maybeExport} interface StructWrapperFns {
wrap(object: {[key: string]: any} | undefined): ${wrapTypeName(options, "Struct")};
unwrap(message: ${wrapTypeName(options, "Struct")}): {[key: string]: any};
}
`,
);
const AnyValueWrapperFns = conditionalOutput(
"AnyValueWrapperFns",
code`
${maybeExport} interface AnyValueWrapperFns {
wrap(value: any): ${wrapTypeName(options, "Value")};
unwrap(message: any): string | number | boolean | Object | null | Array<any> | undefined;
}
`,
);
const ListValueWrapperFns = conditionalOutput(
"ListValueWrapperFns",
code`
${maybeExport} interface ListValueWrapperFns {
wrap(array: ${options.useReadonlyTypes ? "Readonly" : ""}Array<any> | undefined): ${wrapTypeName(
options,
"ListValue",
)};
unwrap(message: ${options.useReadonlyTypes ? "any" : wrapTypeName(options, "ListValue")}): Array<any>;
}
`,
);
const FieldMaskWrapperFns = conditionalOutput(
"FieldMaskWrapperFns",
code`
${maybeExport} interface FieldMaskWrapperFns {
wrap(paths: ${options.useReadonlyTypes ? "readonly" : ""} string[]): ${wrapTypeName(options, "FieldMask")};
unwrap(message: ${options.useReadonlyTypes ? "any" : wrapTypeName(options, "FieldMask")}): string[] ${
options.useOptionals === "all" ? "| undefined" : ""
};
}
`,
);
return {
MessageFns,
ExtensionFns,
ExtensionHolder,
StructWrapperFns,
AnyValueWrapperFns,
ListValueWrapperFns,
FieldMaskWrapperFns,
};
}
function makeObjectIdMethods() {
const mongodb = imp("mongodb*mongodb");
const fromProtoObjectId = conditionalOutput(
"fromProtoObjectId",
code`
function fromProtoObjectId(oid: ObjectId): ${mongodb}.ObjectId {
return new ${mongodb}.ObjectId(oid.value);
}
`,
);
const fromJsonObjectId = conditionalOutput(
"fromJsonObjectId",
code`
function fromJsonObjectId(o: any): ${mongodb}.ObjectId {
if (o instanceof ${mongodb}.ObjectId) {
return o;
} else if (typeof o === "string") {
return new ${mongodb}.ObjectId(o);
} else {
return ${fromProtoObjectId}(ObjectId.fromJSON(o));
}
}
`,
);
const toProtoObjectId = conditionalOutput(
"toProtoObjectId",
code`
function toProtoObjectId(oid: ${mongodb}.ObjectId): ObjectId {
const value = oid.toString();
return { value };
}
`,
);
return { fromJsonObjectId, fromProtoObjectId, toProtoObjectId };
}
function makeTimestampMethods(
options: Options,
longs: ReturnType<typeof makeLongUtils>,
bytes: ReturnType<typeof makeByteUtils>,
) {
const Timestamp = impProto(options, "google/protobuf/timestamp", wrapTypeName(options, "Timestamp"));
const NanoDate = imp("NanoDate=nano-date");
let seconds: string | Code = "Math.trunc(date.getTime() / 1_000)";
let toNumberCode: string | Code = "t.seconds";
const makeToNumberCode = (methodCall: string) =>
`t.seconds${options.useOptionals === "all" || options.noDefaultsForOptionals ? "?" : ""}.${methodCall}`;
if (options.forceLong === LongOption.LONG) {
toNumberCode = makeToNumberCode("toNumber()");
seconds = code`${longs.numberToLong}(${seconds})`;
} else if (options.forceLong === LongOption.BIGINT) {
toNumberCode = code`${bytes.globalThis}.Number(${makeToNumberCode("toString()")})`;
seconds = code`BigInt(${seconds})`;
} else if (options.forceLong === LongOption.STRING) {
toNumberCode = code`${bytes.globalThis}.Number(t.seconds)`;
seconds = code`${seconds}.toString()`;
}
const maybeTypeField = addTypeToMessages(options) ? `$type: 'google.protobuf.Timestamp',` : "";
const toTimestamp = conditionalOutput(
"toTimestamp",
options.useDate === DateOption.STRING
? code`
function toTimestamp(dateStr: string): ${Timestamp} {
const date = new ${bytes.globalThis}.Date(dateStr);
const seconds = ${seconds};
const nanos = (date.getTime() % 1_000) * 1_000_000;
return { ${maybeTypeField} seconds, nanos };
}
`
: options.useDate === DateOption.STRING_NANO
? code`
function toTimestamp(dateStr: string): ${Timestamp} {
const nanoDate = new ${NanoDate}(dateStr);
const date = {
getTime: (): number => nanoDate.valueOf(),
} as const;
const seconds = ${seconds};
let nanos = nanoDate.getMilliseconds() * 1_000_000;
nanos += nanoDate.getMicroseconds() * 1_000;
nanos += nanoDate.getNanoseconds();
return { ${maybeTypeField} seconds, nanos };
}
`
: code`
function toTimestamp(date: Date): ${Timestamp} {
const seconds = ${seconds};
const nanos = (date.getTime() % 1_000) * 1_000_000;
return { ${maybeTypeField} seconds, nanos };
}
`,
);
const fromTimestamp = conditionalOutput(
"fromTimestamp",
options.useDate === DateOption.STRING
? code`
function fromTimestamp(t: ${Timestamp}): string {
let millis = (${toNumberCode} || 0) * 1_000;
millis += (t.nanos || 0) / 1_000_000;
return new ${bytes.globalThis}.Date(millis).toISOString();
}