262 lines
9.2 KiB
JavaScript
Vendored
262 lines
9.2 KiB
JavaScript
Vendored
// Copyright 2021-2024 Buf Technologies, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import { assert } from "./private/assert.js";
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import { proto3 } from "./proto3.js";
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import { proto2 } from "./proto2.js";
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import { ScalarType } from "./scalar.js";
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import { localName } from "./private/names.js";
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import { Timestamp } from "./google/protobuf/timestamp_pb.js";
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import { Duration } from "./google/protobuf/duration_pb.js";
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import { Any } from "./google/protobuf/any_pb.js";
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import { Empty } from "./google/protobuf/empty_pb.js";
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import { FieldMask } from "./google/protobuf/field_mask_pb.js";
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import { ListValue, NullValue, Struct, Value, } from "./google/protobuf/struct_pb.js";
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import { getEnumType } from "./private/enum.js";
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import { BoolValue, BytesValue, DoubleValue, FloatValue, Int32Value, Int64Value, StringValue, UInt32Value, UInt64Value, } from "./google/protobuf/wrappers_pb.js";
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import { FieldDescriptorProto_Label, FieldDescriptorProto_Type, FileDescriptorSet, } from "./google/protobuf/descriptor_pb.js";
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import { createDescriptorSet } from "./create-descriptor-set.js";
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import { isMessage } from "./is-message.js";
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// well-known message types with specialized JSON representation
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const wkMessages = [
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Any,
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Duration,
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Empty,
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FieldMask,
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Struct,
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Value,
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ListValue,
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Timestamp,
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Duration,
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DoubleValue,
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FloatValue,
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Int64Value,
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Int32Value,
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UInt32Value,
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UInt64Value,
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BoolValue,
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StringValue,
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BytesValue,
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];
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// well-known enum types with specialized JSON representation
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const wkEnums = [getEnumType(NullValue)];
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/**
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* Create a registry from a set of descriptors. The types returned by this
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* registry behave exactly like types from generated code.
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*
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* This function accepts google.protobuf.FileDescriptorSet in serialized or
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* deserialized form. Alternatively, it also accepts a DescriptorSet (see
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* createDescriptorSet()).
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*
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* By default, all well-known types with a specialized JSON representation
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* are replaced with their generated counterpart in this package.
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*/
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export function createRegistryFromDescriptors(input, replaceWkt = true) {
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const set = input instanceof Uint8Array || isMessage(input, FileDescriptorSet)
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? createDescriptorSet(input)
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: input;
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const enums = new Map();
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const messages = new Map();
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const extensions = new Map();
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const extensionsByExtendee = new Map();
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const services = {};
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if (replaceWkt) {
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for (const mt of wkMessages) {
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messages.set(mt.typeName, mt);
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}
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for (const et of wkEnums) {
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enums.set(et.typeName, et);
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}
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}
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return {
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/**
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* May raise an error on invalid descriptors.
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*/
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findEnum(typeName) {
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const existing = enums.get(typeName);
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if (existing) {
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return existing;
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}
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const desc = set.enums.get(typeName);
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if (!desc) {
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return undefined;
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}
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const runtime = desc.file.syntax == "proto3" ? proto3 : proto2;
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const type = runtime.makeEnumType(typeName, desc.values.map((u) => ({
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no: u.number,
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name: u.name,
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localName: localName(u),
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})), {});
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enums.set(typeName, type);
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return type;
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},
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/**
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* May raise an error on invalid descriptors.
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*/
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findMessage(typeName) {
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const existing = messages.get(typeName);
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if (existing) {
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return existing;
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}
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const desc = set.messages.get(typeName);
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if (!desc) {
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return undefined;
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}
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const runtime = desc.file.syntax == "proto3" ? proto3 : proto2;
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const fields = [];
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const type = runtime.makeMessageType(typeName, () => fields, {
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localName: localName(desc),
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});
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messages.set(typeName, type);
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for (const field of desc.fields) {
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fields.push(makeFieldInfo(field, this));
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}
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return type;
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},
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/**
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* May raise an error on invalid descriptors.
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*/
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findService(typeName) {
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const existing = services[typeName];
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if (existing) {
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return existing;
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}
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const desc = set.services.get(typeName);
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if (!desc) {
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return undefined;
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}
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const methods = {};
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for (const method of desc.methods) {
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const I = resolve(method.input, this, method);
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const O = resolve(method.output, this, method);
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methods[localName(method)] = {
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name: method.name,
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I,
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O,
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kind: method.methodKind,
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idempotency: method.idempotency,
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// We do not surface options at this time
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// options: {},
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};
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}
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return (services[typeName] = {
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typeName: desc.typeName,
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methods,
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});
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},
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/**
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* May raise an error on invalid descriptors.
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*/
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findExtensionFor(typeName, no) {
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var _a;
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if (!set.messages.has(typeName)) {
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return undefined;
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}
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let extensionsByNo = extensionsByExtendee.get(typeName);
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if (!extensionsByNo) {
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// maintain a lookup for extension desc by number
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extensionsByNo = new Map();
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extensionsByExtendee.set(typeName, extensionsByNo);
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for (const desc of set.extensions.values()) {
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if (desc.extendee.typeName == typeName) {
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extensionsByNo.set(desc.number, desc);
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}
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}
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}
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const desc = (_a = extensionsByExtendee.get(typeName)) === null || _a === void 0 ? void 0 : _a.get(no);
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return desc ? this.findExtension(desc.typeName) : undefined;
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},
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/**
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* May raise an error on invalid descriptors.
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*/
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findExtension(typeName) {
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const existing = extensions.get(typeName);
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if (existing) {
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return existing;
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}
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const desc = set.extensions.get(typeName);
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if (!desc) {
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return undefined;
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}
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const extendee = resolve(desc.extendee, this, desc);
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const runtime = desc.file.syntax == "proto3" ? proto3 : proto2;
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const ext = runtime.makeExtension(typeName, extendee, makeFieldInfo(desc, this));
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extensions.set(typeName, ext);
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return ext;
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},
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};
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}
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function makeFieldInfo(desc, registry) {
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var _a;
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const f = {
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kind: desc.fieldKind,
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no: desc.number,
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name: desc.name,
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jsonName: desc.jsonName,
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delimited: desc.proto.type == FieldDescriptorProto_Type.GROUP,
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repeated: desc.repeated,
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packed: desc.packed,
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oneof: (_a = desc.oneof) === null || _a === void 0 ? void 0 : _a.name,
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opt: desc.optional,
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req: desc.proto.label === FieldDescriptorProto_Label.REQUIRED,
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};
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switch (desc.fieldKind) {
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case "map": {
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assert(desc.kind == "field"); // maps are not allowed for extensions
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let T;
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switch (desc.mapValue.kind) {
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case "scalar":
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T = desc.mapValue.scalar;
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break;
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case "enum": {
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T = resolve(desc.mapValue.enum, registry, desc);
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break;
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}
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case "message": {
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T = resolve(desc.mapValue.message, registry, desc);
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break;
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}
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}
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f.K = desc.mapKey;
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f.V = {
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kind: desc.mapValue.kind,
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T,
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};
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break;
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}
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case "message": {
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f.T = resolve(desc.message, registry, desc);
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break;
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}
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case "enum": {
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f.T = resolve(desc.enum, registry, desc);
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f.default = desc.getDefaultValue();
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break;
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}
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case "scalar": {
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f.L = desc.longType;
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f.T = desc.scalar;
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f.default = desc.getDefaultValue();
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break;
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}
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}
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return f;
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}
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function resolve(desc, registry, context) {
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const type = desc.kind == "message"
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? registry.findMessage(desc.typeName)
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: registry.findEnum(desc.typeName);
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assert(type, `${desc.toString()}" for ${context.toString()} not found`);
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return type;
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}
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