https://github.com/bsima/haskell-urbit-api

talk to your urbit from haskell
https://github.com/bsima/haskell-urbit-api

haskell urbit

Last synced: about 1 month ago
JSON representation

talk to your urbit from haskell

• Host: GitHub
• URL: https://github.com/bsima/haskell-urbit-api
• Owner: bsima
• License: mit
• Created: 2020-08-27T12:35:02.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2021-03-20T08:41:08.000Z (almost 4 years ago)
• Last Synced: 2024-03-14T23:47:12.077Z (9 months ago)
• Topics: haskell, urbit
• Language: Haskell
• Homepage:
• Size: 55.7 KB
• Stars: 9
• Watchers: 3
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-urbit - Haskell

README

        
# Haskell Urbit API

[![License MIT](https://img.shields.io/badge/license-MIT-brightgreen.svg)](https://opensource.org/licenses/MIT)

[![Hackage](https://img.shields.io/hackage/v/urbit-api.svg?style=flat)](https://hackage.haskell.org/package/urbit-api)

[![builds.sr.ht status](https://builds.sr.ht/~ben/urbit-api.svg)](https://builds.sr.ht/~ben/urbit-api?)

[![awesome urbit badge](https://img.shields.io/badge/~-awesome%20urbit-lightgrey)](https://github.com/urbit/awesome-urbit)

This library helps you talk to your Urbit from Haskell, via HTTP.

The Urbit API is a command-query API that lets you hook into apps running on

your Urbit. You can submit commands (called "pokes") and subscribe to

responses.

See the `test.hs` file for some example usages.

## Design

The Urbit vane `eyre` is responsible for defining the API interface. The path to

the API is `/~/channel/...`, where we send messages to the global log (called

`poke`s) which are then dispatched to the appropriate apps. To receive

responses, we stream messages from a path associated with the app, such as

`/mailbox/~/~zod/mc`. Internally, I believe Urbit calls these `wire`s.

`urbit-api` handles most of the path, session, and HTTP request stuff

automatically. See the

[haddocks](https://hackage.haskell.org/package/urbit-api/docs/Urbit-API.html)

for more details.

This library is built on req, conduit, and aeson, all of which are very stable

and usable libraries for working with HTTP requests and web data.

## Example usage

```haskell

import qualified Data.Aeson as Aeson

import Data.Aeson ((.=))

import qualified Data.Text as Text

import qualified Data.UUID.V4 as UUID

import Urbit.API

main :: IO ()

main = do

  let fakezod = Ship

    { uid = "0123456789abcdef",

      name = "zod",

      lastEventId = 1,

      url = "http://localhost:8081",

      code = "lidlut-tabwed-pillex-ridrup"

    }

  -- Establish connection

  sess <- connect ship

  -- Send a message by poking the chat-hook

  uuid <- UUID.nextRandom

  poke sess ship "zod" "chat-hook" "json" $

    Aeson.object

      [ "message"

          .= Aeson.object

            [ "path" .= Text.pack "/~/~zod/mc",

              "envelope"

                .= Aeson.object

                  [ "uid" .= UUID.toText uuid,

                    "number" .= (1 :: Int),

                    "author" .= Text.pack "~zod",

                    "when" .= (1602118786225 :: Int),

                    "letter" .= Aeson.object ["text" .= Text.pack "hello world from haskell!"]

                  ]

            ]

      ]

```

## TODO

- fix test suite on travis (OOM when trying to compile urbit)

- more sophisticated test cases, also use cabal test instead of homegrown thing

- add an exe that wraps the library with a cli

- port to ghcjs

- put some examples in the docs

- graph store interface

- additional agent interfaces