trpc-webrtc/dist/internals/transformResult.js

A set of TRPC adapters for communication via RTCDataChannel in the browser

import { TRPCClientError } from "@trpc/client";
// FIXME:
// - the generics here are probably unnecessary
// - the RPC-spec could probably be simplified to combine HTTP + WS
/** @internal */
function transformResultInner(response, runtime) {
    if ("error" in response) {
        const error = runtime.transformer.deserialize(response.error);
        return {
            ok: false,
            error: {
                ...response,
                error,
            },
        };
    }
    const result = {
        ...response.result,
        ...((!response.result.type || response.result.type === "data") && {
            type: "data",
            data: runtime.transformer.deserialize(response.result.data),
        }),
    };
    return { ok: true, result };
}
function isObject(value) {
    // check that value is object
    return !!value && !Array.isArray(value) && typeof value === "object";
}
/**
 * Transforms and validates that the result is a valid TRPCResponse
 * @internal
 */
export function transformResult(response, runtime) {
    let result;
    try {
        // Use the data transformers on the JSON-response
        result = transformResultInner(response, runtime);
    }
    catch (err) {
        throw new TRPCClientError("Unable to transform response from server");
    }
    // check that output of the transformers is a valid TRPCResponse
    if (!result.ok &&
        (!isObject(result.error.error) ||
            typeof result.error.error.code !== "number")) {
        throw new TRPCClientError("Badly formatted response from server");
    }
    if (result.ok && !isObject(result.result)) {
        throw new TRPCClientError("Badly formatted response from server");
    }
    return result;
}