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index.js
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index.js
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import {getRoutableSignals, flattenConfig} from './utils'
import urlMapper from 'url-mapper'
let addressbar
try {
addressbar = require('addressbar')
} catch (e) {
addressbar = {
pathname: '/',
value: '',
origin: '',
on () {},
removeListener () {}
}
}
export function redirect (url) {
function redirect ({router}) {
router.redirect(url)
}
return redirect
}
export function goTo (url) {
function goTo ({router}) {
router.goTo(url)
}
return goTo
}
export default function Router (options = {}) {
options.mapper = urlMapper({query: options.query})
return (controller) => {
if (!options.mapper || typeof options.mapper.map !== 'function') {
throw new Error('Cerebral router - mapper option must be provided.')
}
const routesConfig = flattenConfig(options.routes)
if (!options.baseUrl && options.onlyHash) {
// autodetect baseUrl
options.baseUrl = addressbar.pathname
}
if (options.baseUrl && options.onlyHash) {
options.baseUrl = (options.baseUrl + '/').replace('//', '/')
}
options.baseUrl = (options.baseUrl || '') + (options.onlyHash ? '#' : '')
const signals = getRoutableSignals(routesConfig, controller)
function onUrlChange (event) {
let url = event ? event.target.value : addressbar.value
url = url.replace(addressbar.origin, '')
if (options.onlyHash && !~url.indexOf('#')) {
// treat hash absense as root route
url = url + '#/'
}
// check if url should be routed
if (url.indexOf(options.baseUrl) === 0) {
const map = options.mapper.map(url.replace(options.baseUrl, ''), routesConfig)
if (map) {
event && event.preventDefault()
addressbar.value = url
signals[map.match].signal(map.values)
} else {
if (options.allowEscape) return
event && event.preventDefault()
console.warn(`Cerebral router - No route matched ${url}, navigation was prevented. Please verify url or catch unmatched routes with a "/*" route.`) // eslint-disable-line no-console
}
}
}
function onSignalStart (execution, payload) {
const signal = signals[execution.name]
if (signal) {
const route = signal.route
const input = payload
addressbar.value = options.baseUrl + options.mapper.stringify(route, input)
}
}
function init () {
addressbar.on('change', onUrlChange)
controller.runTree.on('start', onSignalStart)
if (!options.preventAutostart) {
onUrlChange()
}
}
const contextProvider = {
getUrl () {
return addressbar.value.replace(addressbar.origin + options.baseUrl, '')
},
goTo (url) {
addressbar.value = options.baseUrl + url
onUrlChange()
},
redirect (url) {
addressbar.value = {
value: options.baseUrl + url,
replace: true
}
onUrlChange()
},
redirectToSignal (signalName, payload) {
const signal = signals[signalName]
if (signal) {
signal.signal(payload)
} else {
console.warn(`Cerebral router - signal ${signalName} is not bound to route. Redirect wouldn't happen.`) // eslint-disable-line no-console
}
}
}
return {
init,
provider (context) {
context.router = contextProvider
return context
}
}
}
}