@protobuf-ts/plugin
Version:
The protocol buffer compiler plugin "protobuf-ts" generates TypeScript, gRPC-web, Twirp, and more.
67 lines (66 loc) • 3 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.MethodInfoGenerator = void 0;
const rt = require("@protobuf-ts/runtime");
const ts = require("typescript");
const typescript_literal_from_value_1 = require("../framework/typescript-literal-from-value");
/**
* Generates TypeScript code for runtime method information,
* from method field information.
*/
class MethodInfoGenerator {
constructor(imports) {
this.imports = imports;
}
createMethodInfoLiterals(source, methodInfos) {
const mi = methodInfos
.map(mi => MethodInfoGenerator.denormalizeMethodInfo(mi))
.map(mi => this.createMethodInfoLiteral(source, mi));
return ts.createArrayLiteral(mi, true);
}
createMethodInfoLiteral(source, methodInfo) {
methodInfo = MethodInfoGenerator.denormalizeMethodInfo(methodInfo);
const properties = [];
// name: The name of the method as declared in .proto
// localName: The name of the method in the runtime.
// idempotency: The idempotency level as specified in .proto.
// serverStreaming: Was the rpc declared with server streaming?
// clientStreaming: Was the rpc declared with client streaming?
// options: Contains custom method options from the .proto source in JSON format.
for (let key of ["name", "localName", "idempotency", "serverStreaming", "clientStreaming", "options"]) {
if (methodInfo[key] !== undefined) {
properties.push(ts.createPropertyAssignment(key, typescript_literal_from_value_1.typescriptLiteralFromValue(methodInfo[key])));
}
}
// I: The generated type handler for the input message.
properties.push(ts.createPropertyAssignment(ts.createIdentifier('I'), ts.createIdentifier(this.imports.typeByName(source, methodInfo.I.typeName))));
// O: The generated type handler for the output message.
properties.push(ts.createPropertyAssignment(ts.createIdentifier('O'), ts.createIdentifier(this.imports.typeByName(source, methodInfo.O.typeName))));
return ts.createObjectLiteral(properties, false);
}
/**
* Turn normalized method info returned by normalizeMethodInfo() back into
* the minimized form.
*/
static denormalizeMethodInfo(info) {
let partial = Object.assign({}, info);
delete partial.service;
if (info.localName === rt.lowerCamelCase(info.name)) {
delete partial.localName;
}
if (!info.serverStreaming) {
delete partial.serverStreaming;
}
if (!info.clientStreaming) {
delete partial.clientStreaming;
}
if (info.options && Object.keys(info.options).length) {
delete partial.info;
}
if (info.idempotency === undefined) {
delete partial.idempotency;
}
return partial;
}
}
exports.MethodInfoGenerator = MethodInfoGenerator;