const document = require('./document')
const codecs = require('./codecs')
const errors = require('./errors')
const transports = require('./transports')
const utils = require('./utils')
function lookupLink (node, keys) {
for (let key of keys) {
if (node instanceof document.Document) {
node = node.content[key]
} else {
node = node[key]
}
if (node === undefined) {
throw new errors.LinkLookupError(`Invalid link lookup: ${JSON.stringify(keys)}`)
}
}
if (!(node instanceof document.Link)) {
throw new errors.LinkLookupError(`Invalid link lookup: ${JSON.stringify(keys)}`)
}
return node
}
class Client {
constructor (options = {}) {
const transportOptions = {
auth: options.auth || null,
headers: options.headers || {},
requestCallback: options.requestCallback,
responseCallback: options.responseCallback
}
this.decoders = options.decoders || [new codecs.CoreJSONCodec(), new codecs.JSONCodec(), new codecs.TextCodec()]
this.transports = options.transports || [new transports.HTTPTransport(transportOptions)]
}
action (document, keys, params = {}) {
const link = lookupLink(document, keys)
const transport = utils.determineTransport(this.transports, link.url)
return transport.action(link, this.decoders, params)
}
get (url) {
const link = new document.Link(url, 'get')
const transport = utils.determineTransport(this.transports, url)
return transport.action(link, this.decoders)
}
}
module.exports = {
Client: Client
}
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