+function populateAsyncUserVideoChannels (authService: AuthService, channel: { id: number, label: string, support?: string }[]) {
+ return new Promise(res => {
+ authService.userInformationLoaded
+ .subscribe(
+ () => {
+ const user = authService.getUser()
+ if (!user) return
+
+ const videoChannels = user.videoChannels
+ if (Array.isArray(videoChannels) === false) return
+
+ videoChannels.forEach(c => channel.push({ id: c.id, label: c.displayName, support: c.support }))
+
+ return res()
+ }
+ )
+ })
+}
+
+function getAbsoluteAPIUrl () {
+ let absoluteAPIUrl = environment.apiUrl
+ if (!absoluteAPIUrl) {
+ // The API is on the same domain
+ absoluteAPIUrl = window.location.origin
+ }
+
+ return absoluteAPIUrl
+}
+
+const datePipe = new DatePipe('en')
+function dateToHuman (date: string) {
+ return datePipe.transform(date, 'medium')
+}
+
+function durationToString (duration: number) {
+ const hours = Math.floor(duration / 3600)
+ const minutes = Math.floor((duration % 3600) / 60)
+ const seconds = duration % 60
+
+ const minutesPadding = minutes >= 10 ? '' : '0'
+ const secondsPadding = seconds >= 10 ? '' : '0'
+ const displayedHours = hours > 0 ? hours.toString() + ':' : ''
+
+ return displayedHours + minutesPadding + minutes.toString() + ':' + secondsPadding + seconds.toString()
+}
+
+function immutableAssign <A, B> (target: A, source: B) {
+ return Object.assign({}, target, source)
+}
+
+function objectToUrlEncoded (obj: any) {
+ const str: string[] = []
+ for (const key of Object.keys(obj)) {
+ str.push(encodeURIComponent(key) + '=' + encodeURIComponent(obj[key]))
+ }
+
+ return str.join('&')
+}
+
+// Thanks: https://gist.github.com/ghinda/8442a57f22099bdb2e34
+function objectToFormData (obj: any, form?: FormData, namespace?: string) {
+ const fd = form || new FormData()
+ let formKey
+
+ for (const key of Object.keys(obj)) {
+ if (namespace) formKey = `${namespace}[${key}]`
+ else formKey = key
+
+ if (obj[key] === undefined) continue
+
+ if (Array.isArray(obj[key]) && obj[key].length === 0) {
+ fd.append(key, null)
+ continue
+ }
+
+ if (obj[key] !== null && typeof obj[ key ] === 'object' && !(obj[ key ] instanceof File)) {
+ objectToFormData(obj[ key ], fd, formKey)
+ } else {
+ fd.append(formKey, obj[ key ])
+ }
+ }
+
+ return fd
+}
+
+function objectLineFeedToHtml (obj: any, keyToNormalize: string) {
+ return immutableAssign(obj, {
+ [keyToNormalize]: lineFeedToHtml(obj[keyToNormalize])
+ })
+}
+
+function lineFeedToHtml (text: string) {
+ if (!text) return text
+
+ return text.replace(/\r?\n|\r/g, '<br />')
+}
+
+function removeElementFromArray <T> (arr: T[], elem: T) {
+ const index = arr.indexOf(elem)
+ if (index !== -1) arr.splice(index, 1)
+}
+
+function sortBy (obj: any[], key1: string, key2?: string) {
+ return obj.sort((a, b) => {
+ const elem1 = key2 ? a[key1][key2] : a[key1]
+ const elem2 = key2 ? b[key1][key2] : b[key1]
+
+ if (elem1 < elem2) return -1
+ if (elem1 === elem2) return 0
+ return 1
+ })
+}
+
+function scrollToTop () {
+ window.scroll(0, 0)
+}
+
+// Thanks: https://github.com/uupaa/dynamic-import-polyfill
+function importModule (path: string) {
+ return new Promise((resolve, reject) => {
+ const vector = '$importModule$' + Math.random().toString(32).slice(2)
+ const script = document.createElement('script')
+
+ const destructor = () => {
+ delete window[ vector ]
+ script.onerror = null
+ script.onload = null
+ script.remove()
+ URL.revokeObjectURL(script.src)
+ script.src = ''
+ }
+
+ script.defer = true
+ script.type = 'module'
+
+ script.onerror = () => {
+ reject(new Error(`Failed to import: ${path}`))
+ destructor()
+ }
+ script.onload = () => {
+ resolve(window[ vector ])
+ destructor()
+ }
+ const absURL = (environment.apiUrl || window.location.origin) + path
+ const loader = `import * as m from "${absURL}"; window.${vector} = m;` // export Module
+ const blob = new Blob([ loader ], { type: 'text/javascript' })
+ script.src = URL.createObjectURL(blob)
+
+ document.head.appendChild(script)
+ })