wechaty-grpc/dist/cjs/src/chunk-transformer.js

gRPC for Wechaty

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.chunkDecoder = exports.chunkEncoder = void 0;
/**
 * A stream transformer that encodes chunks into protobufs (and vice versa)
 */
const stronger_typed_streams_1 = require("stronger-typed-streams");
/**
 * Wrap Chunk
 */
const chunkEncoder = (PbConstructor) => new stronger_typed_streams_1.Transform({
    objectMode: true,
    transform: (chunk, _, callback) => {
        const pb = new PbConstructor();
        pb.setChunk(chunk);
        callback(null, pb);
    },
});
exports.chunkEncoder = chunkEncoder;
/**
 * Unwrap Chunk
 */
const chunkDecoder = () => new stronger_typed_streams_1.Transform({
    objectMode: true,
    transform: (pb, _, callback) => {
        const chunk = pb.getChunk();
        if (chunk) {
            callback(null, chunk);
        }
        else {
            callback(new Error('NOCHUNK'));
        }
    },
});
exports.chunkDecoder = chunkDecoder;
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