ts

The ts package makes it easy for users to write functions that can be used in rserve-ts applications.

Installation

You can install the development version of ts from GitHub with:

# install.packages("devtools")
devtools::install_github("tmelliott/ts")

Example

Writing functions is easy, just use the ts_*() functions to define formals and return types.

# demo.R
library(ts)
addFn <- ts_function(
  function(a = ts_numeric(1), b = ts_numeric(1)) a + b,
  result = ts_numeric(1)
)
sampleFn <- ts_function(
  function(x = ts_character(), n = ts_integer(1)) sample(x, n),
  result = ts_character()
)
app <- ts_function(
  function() {
    list(
      add = addFn,
      sample = sampleFn
    )
  },
  result = ts_list(
    add = addFn,
    sample = sampleFn
  )
)

# TODO: specify exactly which functions to export in the entry point
# ts_export(app)

Then use ts_compile() to generate the TypeScript schemas:

import { Robj } from 'rserve-ts';
import { z } from 'zod';

const addFn = Robj.ocap([z.number(), z.number()], Robj.numeric(1));
const app = Robj.ocap([],
  Robj.list({
    add: Robj.ocap(),
    sample: Robj.ocap()
  })
);
const sampleFn = Robj.ocap(
  [z.union([z.string(), z.array(z.string())]), z.number()],
  Robj.character()
);

export default {
  addFn,
  app,
  sampleFn
};

You can then import this into your rserve-ts application. See tests/testthat/sampler for an example.

It is also possible to generate a sourceable file to deploy an Rserve instance with your app code using ts_deploy():

ts_deploy(app)
# run with: Rscript app.rserve.R