1 files changed, 210 insertions, 0 deletions

diff --git a/client/src/app/helpers/utils.ts b/client/src/app/helpers/utils.ts
new file mode 100644
index 000000000..879f697f4
--- /dev/null
+++ b/client/src/app/helpers/utils.ts
@@ -0,0 +1,210 @@
+import { DatePipe } from '@angular/common'
+import { environment } from '../../environments/environment'
+import { AuthService } from '../core/auth'
+
+// Thanks: https://stackoverflow.com/questions/901115/how-can-i-get-query-string-values-in-javascript
+function getParameterByName (name: string, url: string) {
+  if (!url) url = window.location.href
+  name = name.replace(/[\[\]]/g, '\\$&')
+
+  const regex = new RegExp('[?&]' + name + '(=([^&#]*)|&|#|$)')
+  const results = regex.exec(url)
+
+  if (!results) return null
+  if (!results[2]) return ''
+
+  return decodeURIComponent(results[2].replace(/\+/g, ' '))
+}
+
+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()
+  ).replace(/^0/, '')
+}
+
+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)
+  })
+}
+
+function isInViewport (el: HTMLElement) {
+  const bounding = el.getBoundingClientRect()
+  return (
+      bounding.top >= 0 &&
+      bounding.left >= 0 &&
+      bounding.bottom <= (window.innerHeight || document.documentElement.clientHeight) &&
+      bounding.right <= (window.innerWidth || document.documentElement.clientWidth)
+  )
+}
+
+function isXPercentInViewport (el: HTMLElement, percentVisible: number) {
+  const rect = el.getBoundingClientRect()
+  const windowHeight = (window.innerHeight || document.documentElement.clientHeight)
+
+  return !(
+    Math.floor(100 - (((rect.top >= 0 ? 0 : rect.top) / +-(rect.height / 1)) * 100)) < percentVisible ||
+    Math.floor(100 - ((rect.bottom - windowHeight) / rect.height) * 100) < percentVisible
+  )
+}
+
+export {
+  sortBy,
+  durationToString,
+  lineFeedToHtml,
+  objectToUrlEncoded,
+  getParameterByName,
+  populateAsyncUserVideoChannels,
+  getAbsoluteAPIUrl,
+  dateToHuman,
+  immutableAssign,
+  objectToFormData,
+  objectLineFeedToHtml,
+  removeElementFromArray,
+  importModule,
+  scrollToTop,
+  isInViewport,
+  isXPercentInViewport
+}