picorpc/dist/objects/request.js

A tiny RPC library and spec, inspired by JSON-RPC 2.0 and tRPC.

/* IMPORT */
import { ERROR_CODE_FAILED_PROCEDURE_EXEC, ERROR_MESS_FAILED_PROCEDURE_EXEC } from '../constants.js';
import Error from './error.js';
import { identity, rethrow } from '../utils.js';
/* MAIN */
class Request {
    /* CONSTRUCTOR */
    constructor(handler, request) {
        this.handler = handler;
        this.request = request;
    }
    /* API */
    exec() {
        return this.then();
    }
    then(onSuccess = identity, onError = rethrow) {
        return this.handler(this.request).then(_response => {
            const response = _response.valueOf();
            if ('error' in response) { // Error response
                const code = response.error.code || ERROR_CODE_FAILED_PROCEDURE_EXEC;
                const message = response.error.message || ERROR_MESS_FAILED_PROCEDURE_EXEC;
                const data = response.error.data;
                const error = new Error(code, message, data);
                throw error;
            }
            else { // Success response
                return response.result; //TSC
            }
        }).then(onSuccess, onError);
    }
    valueOf() {
        return this.request;
    }
}
/* EXPORT */
export default Request;