byte-sdk

Simple model for writing Byte computers.

Computers appear in the Byte client and can provide an extended feature set for the user. Writing a new computer can be quite easy:
``
var app = require(‘koa’)();
var router = require(‘koa-router’);
var ByteSDK = require(‘byte-sdk’);
var btcaverage = require(‘btcaverage’);

var routes = new router();
app.use(routes.routes());
app.use(routes.allowedMethods());

routes.get(‘/bitcoin’, function* () {
var response = new ByteSDK.ComputerResponse();

var priceDetails = yield btcaverage();
response.addObject(new ByteSDK.TextObject({
‘text’: ‘$’ + parseFloat(priceDetails.average).toFixed(2)
}));

this.body = response;
});

app.listen(3000);
`

Look in examples/computers for some more complete examples.

Contents

* What is a Computer?
* Types of Computers
* ComputerResponse Object Specs
* Error Handling
* Testing
* Shipping a Computer
* Registering a Computer

What is a Computer?

Simply put, a Byte Computer is a minimal web–app that returns a ComputerResponse() object containing at least one Object (currently: Paragraph, Text, Link, Image, Graphic, Gif, Video, or Music).

Types of Computers

There are two types of computers: those that require config and those that do not.

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If the computer returns a response without any config (e.g., Bitcoin), you only need to define a GET route (to return the results):
`
routes.get(‘/bitcoin’, function* () {
var response = new ByteSDK.ComputerResponse();
…
this.body = response;
});
`

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If the computer requires input/config to return a result (e.g., Image Search), you must define both a GET route (to return the config params) and a POST route (to return the results):
`
routes.get(‘/images’, function* () {
this.body = new ByteSDK.ComputerConfig(‘query’, ‘kittens’);
});

routes.post(‘/images’, bodyParser, function* () {
var query = this.request.body.data.query;
var response = new ByteSDK.ComputerResponse();
…
this.body = response;
});
`

#### ComputerConfig Object Specs
To create a computer config object, return new ByteSDK.ComputerConfig(name, placeholder) where:
* name is the label for the object (you’ll use this to access the config response in your POST handler)
* placeholder is a string that is displayed to the user as an example input (e.g., ‘Dora the Explorer’)

ComputerResponse Object Specs


To create a computer config object, call new ByteSDK.ComputerResponse(). To add an object to the computer response, call response.addObject(object) where object is a response object.

There are currently eight types of response objects: ParagraphObject, TextObject, LinkObject, ImageObject, GraphicObject, GifObject, VideoObject, and MusicObject. These are simple to create: new ByteSDK.ParagraphObject({}).

The parameters for these response objects are documented in the BFF documentation.

Error Handling


If you encounter an error at any point, simply return a 400 or a 500 to the client. The client will then inform the user that an error occurred and will prompt them to try again.

Testing

At the very least, you should use curl to test your computer locally before shipping. For example:
* curl -X GET -H “Accept:application/json” http://localhost:3000/kanye
* curl -X POST -H “Accept:application/json” -H “Content-Type:application/json” http://localhost:3000/gifs -d ‘{“data”: {“query”: “cat”}}’`

Broken computers will be removed from the app automatically on a regular basis.

Shipping a Computer

We currently only support self–hosting for custom computers. Since computers are simple web–apps (and since you’re using this library, it’s probably a node.js app), there are countless options for hosting your computer. These include:
* Azure
* Heroku
* Digital Ocean
* node.js cloud
* GigaPros

However, we do have a mechanism for hosting basic computers (those that return a simple set of images without any logic). Head over to developers.byte.co to get started.

Registering a Computer

Once you have finished developing your computer, you need to register it for it to show up in the Byte app. To get started, head to developers.byte.co and sign in with your Byte account.

Once registered, your computer will immediately be searchable within the app. You should check and see if it works as intended.

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There is no formal approval process. However, we automatically run a check to make sure your endpoint is live and functional when you register the computer.

Byte reserves the right to disable any computers that do not work properly, as well as any computers that serve illegal/infringing content.