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58 lines
2 KiB
JavaScript
58 lines
2 KiB
JavaScript
"use strict";
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// Copyright 2021-2026 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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Object.defineProperty(exports, "__esModule", { value: true });
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exports.enumDesc = enumDesc;
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exports.tsEnum = tsEnum;
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exports.objEnum = objEnum;
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/**
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* Hydrate an enum descriptor.
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*
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* @private
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*/
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function enumDesc(file, path, ...paths) {
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if (paths.length == 0) {
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return file.enums[path];
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}
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const e = paths.pop(); // we checked length above
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return paths.reduce((acc, cur) => acc.nestedMessages[cur], file.messages[path]).nestedEnums[e];
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}
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/**
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* Construct a TypeScript enum object at runtime from a descriptor.
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*
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* The returned object is identical to a transpiled TS enum and includes the
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* reverse mapping, see https://www.typescriptlang.org/docs/handbook/enums.html#reverse-mappings
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*/
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function tsEnum(desc) {
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const enumObject = {};
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for (const value of desc.values) {
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enumObject[value.localName] = value.number;
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enumObject[value.number] = value.localName;
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}
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return enumObject;
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}
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/**
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* Construct an object enum at runtime from a descriptor.
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*
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* The returned object is a record of enum value name to integer value. It's
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* a subset of transpiled TS enums - it does not include the reverse mapping,
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* and only supports lookup by value name.
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*/
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function objEnum(desc) {
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const enumObject = {};
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for (const value of desc.values) {
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enumObject[value.localName] = value.number;
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}
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return enumObject;
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}
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