@crossroad/client

• register a crossroad extension
• query a crossroad server

createExtension()

import { createExtension } from '@crossroad/client'

createExtension({
    // Target a @crossroad API server:
    endpoint: 'http://crossroad-server.com',
    token: 'extension-secret-token',

    // Describe your extension:
    name: 'Foo',
    secret: 'xxx',

    // Variables can be used in the definition as first class placeholders
    variables: [
        { name: 'var1', value: 'xxx' },
        { name: 'var2', value: 'yyy' },
    ],
    
    // Headers are prepended to each endpoint definition, value can use variables
    variables: [
        { name: 'x-foo', value: 'var1' },
        { name: 'x-aaa', value: '{{ var1 }}/{{ var2 }}' },
    ],

    // Extension definition as in @marcopeg/graphql-extension
    definition: { ... },
})

secret

Used by @crossroad to generate a meta.signature token that can be verified by the client.
You can then protect your routes with extension.createMiddleware()

variables

Every item that you define into variables will be available for templating in the rest of the definition, along with the values that are provided by the @crossroad server at evaluation time.

• meta.origin
• meta.signature
• root.xxx
• args.xxx

runQuery()

import { runQuery } from '@crossroad/client'
runQuery({
    query: 'query foo (@name: String!) { Ext1 { name(name:$name) }}', 
    variables: { name: 'foo' },
    endpoint: 'http://crossroad-server.com',
    headers: {
        'x-grapi-origin': 'client token'
    },
})

HttpError

Custom error utility that play nicely with an Express error handler.
(to be completed)