client/src/app/shared/misc/utils.ts

   1 // Thanks: https://stackoverflow.com/questions/901115/how-can-i-get-query-string-values-in-javascript
   2
   3 import { DatePipe } from '@angular/common'
   4 import { environment } from '../../../environments/environment'
   5 import { AuthService } from '../../core/auth'
   6
   7 function getParameterByName (name: string, url: string) {
   8   if (!url) url = window.location.href
   9   name = name.replace(/[\[\]]/g, '\\$&')
  10
  11   const regex = new RegExp('[?&]' + name + '(=([^&#]*)|&|#|$)')
  12   const results = regex.exec(url)
  13
  14   if (!results) return null
  15   if (!results[2]) return ''
  16
  17   return decodeURIComponent(results[2].replace(/\+/g, ' '))
  18 }
  19
  20 function populateAsyncUserVideoChannels (authService: AuthService, channel: { id: number, label: string, support?: string }[]) {
  21   return new Promise(res => {
  22     authService.userInformationLoaded
  23       .subscribe(
  24         () => {
  25           const user = authService.getUser()
  26           if (!user) return
  27
  28           const videoChannels = user.videoChannels
  29           if (Array.isArray(videoChannels) === false) return
  30
  31           videoChannels.forEach(c => channel.push({ id: c.id, label: c.displayName, support: c.support }))
  32
  33           return res()
  34         }
  35       )
  36   })
  37 }
  38
  39 function getAbsoluteAPIUrl () {
  40   let absoluteAPIUrl = environment.apiUrl
  41   if (!absoluteAPIUrl) {
  42     // The API is on the same domain
  43     absoluteAPIUrl = window.location.origin
  44   }
  45
  46   return absoluteAPIUrl
  47 }
  48
  49 const datePipe = new DatePipe('en')
  50 function dateToHuman (date: string) {
  51   return datePipe.transform(date, 'medium')
  52 }
  53
  54 function durationToString (duration: number) {
  55   const hours = Math.floor(duration / 3600)
  56   const minutes = Math.floor((duration % 3600) / 60)
  57   const seconds = duration % 60
  58
  59   const minutesPadding = minutes >= 10 ? '' : '0'
  60   const secondsPadding = seconds >= 10 ? '' : '0'
  61   const displayedHours = hours > 0 ? hours.toString() + ':' : ''
  62
  63   return displayedHours + minutesPadding + minutes.toString() + ':' + secondsPadding + seconds.toString()
  64 }
  65
  66 function immutableAssign <A, B> (target: A, source: B) {
  67   return Object.assign({}, target, source)
  68 }
  69
  70 function objectToUrlEncoded (obj: any) {
  71   const str: string[] = []
  72   for (const key of Object.keys(obj)) {
  73     str.push(encodeURIComponent(key) + '=' + encodeURIComponent(obj[key]))
  74   }
  75
  76   return str.join('&')
  77 }
  78
  79 // Thanks: https://gist.github.com/ghinda/8442a57f22099bdb2e34
  80 function objectToFormData (obj: any, form?: FormData, namespace?: string) {
  81   let fd = form || new FormData()
  82   let formKey
  83
  84   for (let key of Object.keys(obj)) {
  85     if (namespace) formKey = `${namespace}[${key}]`
  86     else formKey = key
  87
  88     if (obj[key] === undefined) continue
  89
  90     if (Array.isArray(obj[key]) && obj[key].length === 0) {
  91       fd.append(key, null)
  92       continue
  93     }
  94
  95     if (obj[key] !== null && typeof obj[ key ] === 'object' && !(obj[ key ] instanceof File)) {
  96       objectToFormData(obj[ key ], fd, formKey)
  97     } else {
  98       fd.append(formKey, obj[ key ])
  99     }
 100   }
 101
 102   return fd
 103 }
 104
 105 function objectLineFeedToHtml (obj: any, keyToNormalize: string) {
 106   return immutableAssign(obj, {
 107     [keyToNormalize]: lineFeedToHtml(obj[keyToNormalize])
 108   })
 109 }
 110
 111 function lineFeedToHtml (text: string) {
 112   if (!text) return text
 113
 114   return text.replace(/\r?\n|\r/g, '<br />')
 115 }
 116
 117 function removeElementFromArray <T> (arr: T[], elem: T) {
 118   const index = arr.indexOf(elem)
 119   if (index !== -1) arr.splice(index, 1)
 120 }
 121
 122 function sortBy (obj: any[], key1: string, key2?: string) {
 123   return obj.sort((a, b) => {
 124     const elem1 = key2 ? a[key1][key2] : a[key1]
 125     const elem2 = key2 ? b[key1][key2] : b[key1]
 126
 127     if (elem1 < elem2) return -1
 128     if (elem1 === elem2) return 0
 129     return 1
 130   })
 131 }
 132
 133 function scrollToTop () {
 134   window.scroll(0, 0)
 135 }
 136
 137 export {
 138   sortBy,
 139   durationToString,
 140   lineFeedToHtml,
 141   objectToUrlEncoded,
 142   getParameterByName,
 143   populateAsyncUserVideoChannels,
 144   getAbsoluteAPIUrl,
 145   dateToHuman,
 146   immutableAssign,
 147   objectToFormData,
 148   objectLineFeedToHtml,
 149   removeElementFromArray,
 150   scrollToTop
 151 }