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constructor() {
Iif (this.instance) {
return this.instance
}
this.instance = this
this._paths = new Map()
this._basePath = window.location.origin
this._exitFn = null
this.paramRegex = /[:](\w+)/
this.lastRoutePath = window.sessionStorage.getItem('last-route-path') || ''
this.historyChangeBind = this.historyChange.bind(this)
window.addEventListener('url-change', this.historyChangeBind)
window.addEventListener('popstate', this.historyChangeBind)
this.$defaultPath
const path = this.urlFullPath()
window.addEventListener('load', this.goto.bind(this, path))
}
getCurrentPath() {
return window.decodeURIComponent(window.location.pathname)
}
getRoute() {
let currentPath = this.getAdjustedPath(this.getCurrentPath())
return [...this._paths.keys()]
.map(this.fromBase64.bind(this))
.find(routeRE => this._pathToRegex(routeRE).test(currentPath))
}
getAdjustedPath(path = '') {
return path.trim() === '/' ? path : path.trim().split('/')
.filter(pathName => pathName.length)
.join('/')
}
_safeDefaultPath() {
let safePath = ''
Iif (this.$defaultPath === '/') {
safePath = this.$defaultPath
} else if (this.$defaultPath) {
safePath = this.$defaultPath.split('/').shift().replace(/[^\w]/g, '')
}
return safePath
}
_defaultPathOption() {
const safePath = this._safeDefaultPath()
return this.$defaultPath ? this._pathToRegex(this.$defaultPath).test(safePath) : false
}
historyChange() {
if (typeof this._exitFn === 'function') {
this._exitFn()
}
this._exitFn = null
const route = this.getRoute()
if ((!route || !this.hasPath(route)) && this._defaultPathOption()) {
this.goto(this._safeDefaultPath())
}
const fullPath = window.decodeURIComponent(this.urlFullPath())
if (this.lastRoutePath !== fullPath) {
window.sessionStorage.setItem('last-route-path', this.lastRoutePath)
}
this.lastRoutePath = fullPath
let handlers = this.getPath(route)
let req = {
exit: this._exit.bind(this),
params: this._pathParams(route),
search: new URLSearchParams(window.location.search)
}
const pipeNext = callbacks => {
if (Array.isArray(callbacks) && callbacks.length) {
const next = callbacks.shift()
Eif (typeof next === 'function') {
next(req, pipeNext.bind(this, callbacks))
}
}
}
if (Array.isArray(handlers)) {
pipeNext(handlers.slice())
}
}
get basePath() {
return this._basePath
}
goto(path, title = '') {
window.history.pushState(path, title, `${this.basePath}${this.urlFullPath(path)}`)
window.dispatchEvent(new CustomEvent('url-change', { detail: path }))
return this
}
urlFullPath(path = window.location.href) {
return this.urlPathname(path) + this.urlHash(path) + this.urlParams(path)
}
urlPathname(path) {
return new URL(path, this.basePath).pathname
}
urlHash(path) {
return new URL(path, this.basePath).hash
}
urlParams(path) {
const pathURL = Array.from(new URL(path, this.basePath).searchParams.entries())
const searchParams = new URLSearchParams(window.location.search)
pathURL.forEach(([key, value]) => {
if (!searchParams.has(key)) {
searchParams.append(key, value)
}
})
const params = searchParams.toString()
return params.length ? `?${params}` : ''
}
toBase64(str) {
return window.btoa(window.unescape(window.encodeURIComponent(str)))
}
fromBase64(str) {
return window.decodeURIComponent(window.escape(window.atob(str)))
}
setPath(path, ...callbacks) {
path = this.getAdjustedPath(path)
Eif (path.length) {
this._paths.set(this.toBase64(path), callbacks)
}
return this
}
defaultPath(path, ...callbacks) {
path = this.getAdjustedPath(path)
Eif (path.length) {
this.$defaultPath = path
this.setPath(this.$defaultPath, ...callbacks)
}
return this
}
getPath(path) {
return this._paths.get(this.toBase64(path))
}
hasPath(path) {
return this._paths.has(this.toBase64(path))
}
reload() {
this.goto(this.urlFullPath())
}
_exit(fn) {
this._exitFn = fn
}
_pathToRegex(path = '') {
const pattern = this.getAdjustedPath(path).split('/')
.filter(pathName => pathName.length)
.map(pathName => this.paramRegex.test(pathName) ? `([\\w\\s&!$*:\\-+]+)${pathName.includes('?') ? '?' : ''}` : pathName)
.join('/?')
return new RegExp(`^/?${pattern || '/'}/?$`)
}
_pathParams(path = '') {
const paramRegexGlobal = /[:](\w+)/g
const matches = path.match(paramRegexGlobal)
const currentPath = this.getAdjustedPath(this.getCurrentPath())
const routeParams = currentPath.match(this._pathToRegex(path))
let params = new Map()
if (matches && routeParams) {
routeParams.shift()
matches.map(param => param.replace(':', '')).forEach(param => {
params.set(param, routeParams.shift())
})
}
return params
}
removeURLSearchParams() {
window.history.replaceState({}, document.title, window.location.pathname)
}
}
export default new Router()
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