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Devil Killer Is Here MiNi Shell

MiNi SheLL

Current Path : /home/vmanager/www/vendor/bower-asset/fullcalendar/src/

Linux 9dbcd5f6333d 5.15.0-124-generic #134-Ubuntu SMP Fri Sep 27 20:20:17 UTC 2024 x86_64
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Current File : /home/vmanager/www/vendor/bower-asset/fullcalendar/src/Calendar.ts

import * as $ from 'jquery'
import * as moment from 'moment'
import { capitaliseFirstLetter, debounce } from './util'
import { globalDefaults, englishDefaults, rtlDefaults } from './options'
import Iterator from './common/Iterator'
import GlobalEmitter from './common/GlobalEmitter'
import { default as EmitterMixin, EmitterInterface } from './common/EmitterMixin'
import { default as ListenerMixin, ListenerInterface } from './common/ListenerMixin'
import Toolbar from './Toolbar'
import OptionsManager from './OptionsManager'
import ViewSpecManager from './ViewSpecManager'
import View from './View'
import Theme from './theme/Theme'
import Constraints from './Constraints'
import { getMomentLocaleData } from './locale'
import momentExt from './moment-ext'
import UnzonedRange from './models/UnzonedRange'
import ComponentFootprint from './models/ComponentFootprint'
import EventDateProfile from './models/event/EventDateProfile'
import EventManager from './models/EventManager'
import BusinessHourGenerator from './models/BusinessHourGenerator'
import EventSourceParser from './models/event-source/EventSourceParser'
import EventDefParser from './models/event/EventDefParser'
import SingleEventDef from './models/event/SingleEventDef'
import EventDefMutation from './models/event/EventDefMutation'
import EventSource from './models/event-source/EventSource'
import { getThemeSystemClass } from './theme/ThemeRegistry'
import { RangeInput, MomentInput, OptionsInput, EventObjectInput, EventSourceInput } from './types/input-types'


export default class Calendar {

  // not for internal use. use options module directly instead.
  static defaults: any = globalDefaults
  static englishDefaults: any = englishDefaults
  static rtlDefaults: any = rtlDefaults

  on: EmitterInterface['on']
  one: EmitterInterface['one']
  off: EmitterInterface['off']
  trigger: EmitterInterface['trigger']
  triggerWith: EmitterInterface['triggerWith']
  hasHandlers: EmitterInterface['hasHandlers']
  listenTo: ListenerInterface['listenTo']
  stopListeningTo: ListenerInterface['stopListeningTo']

  view: View // current View object
  viewsByType: { [viewName: string]: View } // holds all instantiated view instances, current or not
  currentDate: moment.Moment // unzoned moment. private (public API should use getDate instead)
  theme: Theme
  eventManager: EventManager
  constraints: Constraints
  optionsManager: OptionsManager
  viewSpecManager: ViewSpecManager
  businessHourGenerator: BusinessHourGenerator
  loadingLevel: number = 0 // number of simultaneous loading tasks

  defaultAllDayEventDuration: moment.Duration
  defaultTimedEventDuration: moment.Duration
  localeData: object

  el: JQuery
  contentEl: JQuery
  suggestedViewHeight: number
  ignoreUpdateViewSize: number = 0
  freezeContentHeightDepth: number = 0
  windowResizeProxy: any

  header: Toolbar
  footer: Toolbar
  toolbarsManager: Iterator


  constructor(el: JQuery, overrides: OptionsInput) {

    // declare the current calendar instance relies on GlobalEmitter. needed for garbage collection.
    // unneeded() is called in destroy.
    GlobalEmitter.needed()

    this.el = el
    this.viewsByType = {}

    this.optionsManager = new OptionsManager(this, overrides)
    this.viewSpecManager = new ViewSpecManager(this.optionsManager, this)
    this.initMomentInternals() // needs to happen after options hash initialized
    this.initCurrentDate()
    this.initEventManager()
    this.constraints = new Constraints(this.eventManager, this)

    this.constructed()
  }


  constructed() {
    // useful for monkeypatching. used?
  }


  getView(): View {
    return this.view
  }


  publiclyTrigger(name: string, triggerInfo) {
    let optHandler = this.opt(name)
    let context
    let args

    if ($.isPlainObject(triggerInfo)) {
      context = triggerInfo.context
      args = triggerInfo.args
    } else if ($.isArray(triggerInfo)) {
      args = triggerInfo
    }

    if (context == null) {
      context = this.el[0] // fallback context
    }

    if (!args) {
      args = []
    }

    this.triggerWith(name, context, args) // Emitter's method

    if (optHandler) {
      return optHandler.apply(context, args)
    }
  }


  hasPublicHandlers(name: string): boolean {
    return this.hasHandlers(name) ||
      this.opt(name) // handler specified in options
  }


  // Options Public API
  // -----------------------------------------------------------------------------------------------------------------


  // public getter/setter
  option(name: string | object, value?) {
    let newOptionHash

    if (typeof name === 'string') {
      if (value === undefined) { // getter
        return this.optionsManager.get(name)
      } else { // setter for individual option
        newOptionHash = {}
        newOptionHash[name] = value
        this.optionsManager.add(newOptionHash)
      }
    } else if (typeof name === 'object') { // compound setter with object input
      this.optionsManager.add(name)
    }
  }


  // private getter
  opt(name: string) {
    return this.optionsManager.get(name)
  }


  // View
  // -----------------------------------------------------------------------------------------------------------------


  // Given a view name for a custom view or a standard view, creates a ready-to-go View object
  instantiateView(viewType: string): View {
    let spec = this.viewSpecManager.getViewSpec(viewType)

    if (!spec) {
      throw new Error(`View type "${viewType}" is not valid`)
    }

    return new spec['class'](this, spec)
  }


  // Returns a boolean about whether the view is okay to instantiate at some point
  isValidViewType(viewType: string): boolean {
    return Boolean(this.viewSpecManager.getViewSpec(viewType))
  }


  changeView(viewName: string, dateOrRange: RangeInput | MomentInput) {

    if (dateOrRange) {
      if ((dateOrRange as RangeInput).start && (dateOrRange as RangeInput).end) { // a range
        this.optionsManager.recordOverrides({ // will not rerender
          visibleRange: dateOrRange
        })
      } else { // a date
        this.currentDate = this.moment(dateOrRange).stripZone() // just like gotoDate
      }
    }

    this.renderView(viewName)
  }


  // Forces navigation to a view for the given date.
  // `viewType` can be a specific view name or a generic one like "week" or "day".
  zoomTo(newDate: moment.Moment, viewType?: string) {
    let spec

    viewType = viewType || 'day' // day is default zoom
    spec = this.viewSpecManager.getViewSpec(viewType) ||
      this.viewSpecManager.getUnitViewSpec(viewType)

    this.currentDate = newDate.clone()
    this.renderView(spec ? spec.type : null)
  }


  // Current Date
  // -----------------------------------------------------------------------------------------------------------------


  initCurrentDate() {
    let defaultDateInput = this.opt('defaultDate')

    // compute the initial ambig-timezone date
    if (defaultDateInput != null) {
      this.currentDate = this.moment(defaultDateInput).stripZone()
    } else {
      this.currentDate = this.getNow() // getNow already returns unzoned
    }
  }


  prev() {
    let view = this.view
    let prevInfo = view.dateProfileGenerator.buildPrev(view.get('dateProfile'))

    if (prevInfo.isValid) {
      this.currentDate = prevInfo.date
      this.renderView()
    }
  }


  next() {
    let view = this.view
    let nextInfo = view.dateProfileGenerator.buildNext(view.get('dateProfile'))

    if (nextInfo.isValid) {
      this.currentDate = nextInfo.date
      this.renderView()
    }
  }


  prevYear() {
    this.currentDate.add(-1, 'years')
    this.renderView()
  }


  nextYear() {
    this.currentDate.add(1, 'years')
    this.renderView()
  }


  today() {
    this.currentDate = this.getNow() // should deny like prev/next?
    this.renderView()
  }


  gotoDate(zonedDateInput) {
    this.currentDate = this.moment(zonedDateInput).stripZone()
    this.renderView()
  }


  incrementDate(delta) {
    this.currentDate.add(moment.duration(delta))
    this.renderView()
  }


  // for external API
  getDate(): moment.Moment {
    return this.applyTimezone(this.currentDate) // infuse the calendar's timezone
  }


  // Loading Triggering
  // -----------------------------------------------------------------------------------------------------------------


  // Should be called when any type of async data fetching begins
  pushLoading() {
    if (!(this.loadingLevel++)) {
      this.publiclyTrigger('loading', [ true, this.view ])
    }
  }


  // Should be called when any type of async data fetching completes
  popLoading() {
    if (!(--this.loadingLevel)) {
      this.publiclyTrigger('loading', [ false, this.view ])
    }
  }


  // High-level Rendering
  // -----------------------------------------------------------------------------------


  render() {
    if (!this.contentEl) {
      this.initialRender()
    } else if (this.elementVisible()) {
      // mainly for the public API
      this.calcSize()
      this.updateViewSize()
    }
  }


  initialRender() {
    let el = this.el

    el.addClass('fc')

    // event delegation for nav links
    el.on('click.fc', 'a[data-goto]', (ev) => {
      let anchorEl = $(ev.currentTarget)
      let gotoOptions = anchorEl.data('goto') // will automatically parse JSON
      let date = this.moment(gotoOptions.date)
      let viewType = gotoOptions.type

      // property like "navLinkDayClick". might be a string or a function
      let customAction = this.view.opt('navLink' + capitaliseFirstLetter(viewType) + 'Click')

      if (typeof customAction === 'function') {
        customAction(date, ev)
      } else {
        if (typeof customAction === 'string') {
          viewType = customAction
        }
        this.zoomTo(date, viewType)
      }
    })

    // called immediately, and upon option change
    this.optionsManager.watch('settingTheme', [ '?theme', '?themeSystem' ], (opts) => {
      let themeClass = getThemeSystemClass(opts.themeSystem || opts.theme)
      let theme = new themeClass(this.optionsManager)
      let widgetClass = theme.getClass('widget')

      this.theme = theme

      if (widgetClass) {
        el.addClass(widgetClass)
      }
    }, () => {
      let widgetClass = this.theme.getClass('widget')

      this.theme = null

      if (widgetClass) {
        el.removeClass(widgetClass)
      }
    })

    this.optionsManager.watch('settingBusinessHourGenerator', [ '?businessHours' ], (deps) => {
      this.businessHourGenerator = new BusinessHourGenerator(deps.businessHours, this)

      if (this.view) {
        this.view.set('businessHourGenerator', this.businessHourGenerator)
      }
    }, () => {
      this.businessHourGenerator = null
    })

    // called immediately, and upon option change.
    // HACK: locale often affects isRTL, so we explicitly listen to that too.
    this.optionsManager.watch('applyingDirClasses', [ '?isRTL', '?locale' ], (opts) => {
      el.toggleClass('fc-ltr', !opts.isRTL)
      el.toggleClass('fc-rtl', opts.isRTL)
    })

    this.contentEl = $("<div class='fc-view-container'/>").prependTo(el)

    this.initToolbars()
    this.renderHeader()
    this.renderFooter()
    this.renderView(this.opt('defaultView'))

    if (this.opt('handleWindowResize')) {
      $(window).resize(
        this.windowResizeProxy = debounce( // prevents rapid calls
          this.windowResize.bind(this),
          this.opt('windowResizeDelay')
        )
      )
    }
  }


  destroy() {
    if (this.view) {
      this.clearView()
    }

    this.toolbarsManager.proxyCall('removeElement')
    this.contentEl.remove()
    this.el.removeClass('fc fc-ltr fc-rtl')

    // removes theme-related root className
    this.optionsManager.unwatch('settingTheme')
    this.optionsManager.unwatch('settingBusinessHourGenerator')

    this.el.off('.fc') // unbind nav link handlers

    if (this.windowResizeProxy) {
      $(window).unbind('resize', this.windowResizeProxy)
      this.windowResizeProxy = null
    }

    GlobalEmitter.unneeded()
  }


  elementVisible(): boolean {
    return this.el.is(':visible')
  }


  // Render Queue
  // -----------------------------------------------------------------------------------------------------------------


  bindViewHandlers(view) {

    view.watch('titleForCalendar', [ 'title' ], (deps) => { // TODO: better system
      if (view === this.view) { // hack
        this.setToolbarsTitle(deps.title)
      }
    })

    view.watch('dateProfileForCalendar', [ 'dateProfile' ], (deps) => {
      if (view === this.view) { // hack
        this.currentDate = deps.dateProfile.date // might have been constrained by view dates
        this.updateToolbarButtons(deps.dateProfile)
      }
    })
  }


  unbindViewHandlers(view) {
    view.unwatch('titleForCalendar')
    view.unwatch('dateProfileForCalendar')
  }


  // View Rendering
  // -----------------------------------------------------------------------------------


  // Renders a view because of a date change, view-type change, or for the first time.
  // If not given a viewType, keep the current view but render different dates.
  // Accepts an optional scroll state to restore to.
  renderView(viewType?: string) {
    let oldView = this.view
    let newView

    this.freezeContentHeight()

    if (oldView && viewType && oldView.type !== viewType) {
      this.clearView()
    }

    // if viewType changed, or the view was never created, create a fresh view
    if (!this.view && viewType) {
      newView = this.view =
        this.viewsByType[viewType] ||
        (this.viewsByType[viewType] = this.instantiateView(viewType))

      this.bindViewHandlers(newView)

      newView.startBatchRender() // so that setElement+setDate rendering are joined
      newView.setElement(
        $("<div class='fc-view fc-" + viewType + "-view' />").appendTo(this.contentEl)
      )

      this.toolbarsManager.proxyCall('activateButton', viewType)
    }

    if (this.view) {

      // prevent unnecessary change firing
      if (this.view.get('businessHourGenerator') !== this.businessHourGenerator) {
        this.view.set('businessHourGenerator', this.businessHourGenerator)
      }

      this.view.setDate(this.currentDate)

      if (newView) {
        newView.stopBatchRender()
      }
    }

    this.thawContentHeight()
  }


  // Unrenders the current view and reflects this change in the Header.
  // Unregsiters the `view`, but does not remove from viewByType hash.
  clearView() {
    let currentView = this.view

    this.toolbarsManager.proxyCall('deactivateButton', currentView.type)

    this.unbindViewHandlers(currentView)

    currentView.removeElement()
    currentView.unsetDate() // so bindViewHandlers doesn't fire with old values next time

    this.view = null
  }


  // Destroys the view, including the view object. Then, re-instantiates it and renders it.
  // Maintains the same scroll state.
  // TODO: maintain any other user-manipulated state.
  reinitView() {
    let oldView = this.view
    let scroll = oldView.queryScroll() // wouldn't be so complicated if Calendar owned the scroll
    this.freezeContentHeight()

    this.clearView()
    this.calcSize()
    this.renderView(oldView.type) // needs the type to freshly render

    this.view.applyScroll(scroll)
    this.thawContentHeight()
  }


  // Resizing
  // -----------------------------------------------------------------------------------


  getSuggestedViewHeight(): number {
    if (this.suggestedViewHeight == null) {
      this.calcSize()
    }
    return this.suggestedViewHeight
  }


  isHeightAuto(): boolean {
    return this.opt('contentHeight') === 'auto' || this.opt('height') === 'auto'
  }


  updateViewSize(isResize: boolean = false) {
    let view = this.view
    let scroll

    if (!this.ignoreUpdateViewSize && view) {

      if (isResize) {
        this.calcSize()
        scroll = view.queryScroll()
      }

      this.ignoreUpdateViewSize++

      view.updateSize(
        this.getSuggestedViewHeight(),
        this.isHeightAuto(),
        isResize
      )

      this.ignoreUpdateViewSize--

      if (isResize) {
        view.applyScroll(scroll)
      }

      return true // signal success
    }
  }


  calcSize() {
    if (this.elementVisible()) {
      this._calcSize()
    }
  }


  _calcSize() { // assumes elementVisible
    let contentHeightInput = this.opt('contentHeight')
    let heightInput = this.opt('height')

    if (typeof contentHeightInput === 'number') { // exists and not 'auto'
      this.suggestedViewHeight = contentHeightInput
    } else if (typeof contentHeightInput === 'function') { // exists and is a function
      this.suggestedViewHeight = contentHeightInput()
    } else if (typeof heightInput === 'number') { // exists and not 'auto'
      this.suggestedViewHeight = heightInput - this.queryToolbarsHeight()
    } else if (typeof heightInput === 'function') { // exists and is a function
      this.suggestedViewHeight = heightInput() - this.queryToolbarsHeight()
    } else if (heightInput === 'parent') { // set to height of parent element
      this.suggestedViewHeight = this.el.parent().height() - this.queryToolbarsHeight()
    } else {
      this.suggestedViewHeight = Math.round(
        this.contentEl.width() /
        Math.max(this.opt('aspectRatio'), .5)
      )
    }
  }


  windowResize(ev: JQueryEventObject) {
    if (
      // the purpose: so we don't process jqui "resize" events that have bubbled up
      // cast to any because .target, which is Element, can't be compared to window for some reason.
      (ev as any).target === window &&
      this.view &&
      this.view.isDatesRendered
    ) {
      if (this.updateViewSize(true)) { // isResize=true, returns true on success
        this.publiclyTrigger('windowResize', [ this.view ])
      }
    }
  }


  /* Height "Freezing"
  -----------------------------------------------------------------------------*/


  freezeContentHeight() {
    if (!(this.freezeContentHeightDepth++)) {
      this.forceFreezeContentHeight()
    }
  }


  forceFreezeContentHeight() {
    this.contentEl.css({
      width: '100%',
      height: this.contentEl.height(),
      overflow: 'hidden'
    })
  }


  thawContentHeight() {
    this.freezeContentHeightDepth--

    // always bring back to natural height
    this.contentEl.css({
      width: '',
      height: '',
      overflow: ''
    })

    // but if there are future thaws, re-freeze
    if (this.freezeContentHeightDepth) {
      this.forceFreezeContentHeight()
    }
  }


  // Toolbar
  // -----------------------------------------------------------------------------------------------------------------


  initToolbars() {
    this.header = new Toolbar(this, this.computeHeaderOptions())
    this.footer = new Toolbar(this, this.computeFooterOptions())
    this.toolbarsManager = new Iterator([ this.header, this.footer ])
  }


  computeHeaderOptions() {
    return {
      extraClasses: 'fc-header-toolbar',
      layout: this.opt('header')
    }
  }


  computeFooterOptions() {
    return {
      extraClasses: 'fc-footer-toolbar',
      layout: this.opt('footer')
    }
  }


  // can be called repeatedly and Header will rerender
  renderHeader() {
    let header = this.header

    header.setToolbarOptions(this.computeHeaderOptions())
    header.render()

    if (header.el) {
      this.el.prepend(header.el)
    }
  }


  // can be called repeatedly and Footer will rerender
  renderFooter() {
    let footer = this.footer

    footer.setToolbarOptions(this.computeFooterOptions())
    footer.render()

    if (footer.el) {
      this.el.append(footer.el)
    }
  }


  setToolbarsTitle(title: string) {
    this.toolbarsManager.proxyCall('updateTitle', title)
  }


  updateToolbarButtons(dateProfile) {
    let now = this.getNow()
    let view = this.view
    let todayInfo = view.dateProfileGenerator.build(now)
    let prevInfo = view.dateProfileGenerator.buildPrev(view.get('dateProfile'))
    let nextInfo = view.dateProfileGenerator.buildNext(view.get('dateProfile'))

    this.toolbarsManager.proxyCall(
      (todayInfo.isValid && !dateProfile.currentUnzonedRange.containsDate(now)) ?
        'enableButton' :
        'disableButton',
      'today'
    )

    this.toolbarsManager.proxyCall(
      prevInfo.isValid ?
        'enableButton' :
        'disableButton',
      'prev'
    )

    this.toolbarsManager.proxyCall(
      nextInfo.isValid ?
        'enableButton' :
        'disableButton',
      'next'
    )
  }


  queryToolbarsHeight() {
    return this.toolbarsManager.items.reduce(function(accumulator, toolbar) {
      let toolbarHeight = toolbar.el ? toolbar.el.outerHeight(true) : 0 // includes margin
      return accumulator + toolbarHeight
    }, 0)
  }


  // Selection
  // -----------------------------------------------------------------------------------------------------------------


  // this public method receives start/end dates in any format, with any timezone
  select(zonedStartInput: MomentInput, zonedEndInput?: MomentInput) {
    this.view.select(
      this.buildSelectFootprint.apply(this, arguments)
    )
  }


  unselect() { // safe to be called before renderView
    if (this.view) {
      this.view.unselect()
    }
  }


  // Given arguments to the select method in the API, returns a span (unzoned start/end and other info)
  buildSelectFootprint(zonedStartInput: MomentInput, zonedEndInput?: MomentInput): ComponentFootprint {
    let start = this.moment(zonedStartInput).stripZone()
    let end

    if (zonedEndInput) {
      end = this.moment(zonedEndInput).stripZone()
    } else if (start.hasTime()) {
      end = start.clone().add(this.defaultTimedEventDuration)
    } else {
      end = start.clone().add(this.defaultAllDayEventDuration)
    }

    return new ComponentFootprint(
      new UnzonedRange(start, end),
      !start.hasTime()
    )
  }


  // Date Utils
  // -----------------------------------------------------------------------------------------------------------------


  initMomentInternals() {

    this.defaultAllDayEventDuration = moment.duration(this.opt('defaultAllDayEventDuration'))
    this.defaultTimedEventDuration = moment.duration(this.opt('defaultTimedEventDuration'))

    // Called immediately, and when any of the options change.
    // Happens before any internal objects rebuild or rerender, because this is very core.
    this.optionsManager.watch('buildingMomentLocale', [
      '?locale', '?monthNames', '?monthNamesShort', '?dayNames', '?dayNamesShort',
      '?firstDay', '?weekNumberCalculation'
    ], (opts) => {
      let weekNumberCalculation = opts.weekNumberCalculation
      let firstDay = opts.firstDay
      let _week

      // normalize
      if (weekNumberCalculation === 'iso') {
        weekNumberCalculation = 'ISO' // normalize
      }

      let localeData = Object.create( // make a cheap copy
        getMomentLocaleData(opts.locale) // will fall back to en
      )

      if (opts.monthNames) {
        localeData._months = opts.monthNames
      }
      if (opts.monthNamesShort) {
        localeData._monthsShort = opts.monthNamesShort
      }
      if (opts.dayNames) {
        localeData._weekdays = opts.dayNames
      }
      if (opts.dayNamesShort) {
        localeData._weekdaysShort = opts.dayNamesShort
      }

      if (firstDay == null && weekNumberCalculation === 'ISO') {
        firstDay = 1
      }
      if (firstDay != null) {
        _week = Object.create(localeData._week) // _week: { dow: # }
        _week.dow = firstDay
        localeData._week = _week
      }

      if ( // whitelist certain kinds of input
        weekNumberCalculation === 'ISO' ||
        weekNumberCalculation === 'local' ||
        typeof weekNumberCalculation === 'function'
      ) {
        localeData._fullCalendar_weekCalc = weekNumberCalculation // moment-ext will know what to do with it
      }

      this.localeData = localeData

      // If the internal current date object already exists, move to new locale.
      // We do NOT need to do this technique for event dates, because this happens when converting to "segments".
      if (this.currentDate) {
        this.localizeMoment(this.currentDate) // sets to localeData
      }
    })
  }


  // Builds a moment using the settings of the current calendar: timezone and locale.
  // Accepts anything the vanilla moment() constructor accepts.
  moment(...args): moment.Moment {
    let mom

    if (this.opt('timezone') === 'local') {
      mom = momentExt.apply(null, args)

      // Force the moment to be local, because momentExt doesn't guarantee it.
      if (mom.hasTime()) { // don't give ambiguously-timed moments a local zone
        mom.local()
      }
    } else if (this.opt('timezone') === 'UTC') {
      mom = momentExt.utc.apply(null, args) // process as UTC
    } else {
      mom = momentExt.parseZone.apply(null, args) // let the input decide the zone
    }

    this.localizeMoment(mom) // TODO

    return mom
  }


  msToMoment(ms: number, forceAllDay: boolean): moment.Moment {
    let mom = momentExt.utc(ms) // TODO: optimize by using Date.UTC

    if (forceAllDay) {
      mom.stripTime()
    } else {
      mom = this.applyTimezone(mom) // may or may not apply locale
    }

    this.localizeMoment(mom)

    return mom
  }


  msToUtcMoment(ms: number, forceAllDay: boolean): moment.Moment {
    let mom = momentExt.utc(ms) // TODO: optimize by using Date.UTC

    if (forceAllDay) {
      mom.stripTime()
    }

    this.localizeMoment(mom)

    return mom
  }


  // Updates the given moment's locale settings to the current calendar locale settings.
  localizeMoment(mom) {
    mom._locale = this.localeData
  }


  // Returns a boolean about whether or not the calendar knows how to calculate
  // the timezone offset of arbitrary dates in the current timezone.
  getIsAmbigTimezone(): boolean {
    return this.opt('timezone') !== 'local' && this.opt('timezone') !== 'UTC'
  }


  // Returns a copy of the given date in the current timezone. Has no effect on dates without times.
  applyTimezone(date: moment.Moment): moment.Moment {
    if (!date.hasTime()) {
      return date.clone()
    }

    let zonedDate = this.moment(date.toArray())
    let timeAdjust = date.time().asMilliseconds() - zonedDate.time().asMilliseconds()
    let adjustedZonedDate

    // Safari sometimes has problems with this coersion when near DST. Adjust if necessary. (bug #2396)
    if (timeAdjust) { // is the time result different than expected?
      adjustedZonedDate = zonedDate.clone().add(timeAdjust) // add milliseconds
      if (date.time().asMilliseconds() - adjustedZonedDate.time().asMilliseconds() === 0) { // does it match perfectly now?
        zonedDate = adjustedZonedDate
      }
    }

    return zonedDate
  }


  /*
  Assumes the footprint is non-open-ended.
  */
  footprintToDateProfile(componentFootprint, ignoreEnd = false) {
    let start = momentExt.utc(componentFootprint.unzonedRange.startMs)
    let end

    if (!ignoreEnd) {
      end = momentExt.utc(componentFootprint.unzonedRange.endMs)
    }

    if (componentFootprint.isAllDay) {
      start.stripTime()

      if (end) {
        end.stripTime()
      }
    } else {
      start = this.applyTimezone(start)

      if (end) {
        end = this.applyTimezone(end)
      }
    }

    return new EventDateProfile(start, end, this)
  }


  // Returns a moment for the current date, as defined by the client's computer or from the `now` option.
  // Will return an moment with an ambiguous timezone.
  getNow(): moment.Moment {
    let now = this.opt('now')
    if (typeof now === 'function') {
      now = now()
    }
    return this.moment(now).stripZone()
  }


  // Produces a human-readable string for the given duration.
  // Side-effect: changes the locale of the given duration.
  humanizeDuration(duration: moment.Duration): string {
    return duration.locale(this.opt('locale')).humanize()
  }


  // will return `null` if invalid range
  parseUnzonedRange(rangeInput: RangeInput): UnzonedRange {
    let start = null
    let end = null

    if (rangeInput.start) {
      start = this.moment(rangeInput.start).stripZone()
    }

    if (rangeInput.end) {
      end = this.moment(rangeInput.end).stripZone()
    }

    if (!start && !end) {
      return null
    }

    if (start && end && end.isBefore(start)) {
      return null
    }

    return new UnzonedRange(start, end)
  }


  // Event-Date Utilities
  // -----------------------------------------------------------------------------------------------------------------


  initEventManager() {
    let eventManager = new EventManager(this)
    let rawSources = this.opt('eventSources') || []
    let singleRawSource = this.opt('events')

    this.eventManager = eventManager

    if (singleRawSource) {
      rawSources.unshift(singleRawSource)
    }

    eventManager.on('release', (eventsPayload) => {
      this.trigger('eventsReset', eventsPayload)
    })

    eventManager.freeze()

    rawSources.forEach((rawSource) => {
      let source = EventSourceParser.parse(rawSource, this)

      if (source) {
        eventManager.addSource(source)
      }
    })

    eventManager.thaw()
  }


  requestEvents(start: moment.Moment, end: moment.Moment) {
    return this.eventManager.requestEvents(
      start,
      end,
      this.opt('timezone'),
      !this.opt('lazyFetching')
    )
  }


  // Get an event's normalized end date. If not present, calculate it from the defaults.
  getEventEnd(event): moment.Moment {
    if (event.end) {
      return event.end.clone()
    } else {
      return this.getDefaultEventEnd(event.allDay, event.start)
    }
  }


  // Given an event's allDay status and start date, return what its fallback end date should be.
  // TODO: rename to computeDefaultEventEnd
  getDefaultEventEnd(allDay: boolean, zonedStart: moment.Moment) {
    let end = zonedStart.clone()

    if (allDay) {
      end.stripTime().add(this.defaultAllDayEventDuration)
    } else {
      end.add(this.defaultTimedEventDuration)
    }

    if (this.getIsAmbigTimezone()) {
      end.stripZone() // we don't know what the tzo should be
    }

    return end
  }


  // Public Events API
  // -----------------------------------------------------------------------------------------------------------------


  rerenderEvents() { // API method. destroys old events if previously rendered.
    this.view.flash('displayingEvents')
  }


  refetchEvents() {
    this.eventManager.refetchAllSources()
  }


  renderEvents(eventInputs: EventObjectInput[], isSticky?: boolean) {
    this.eventManager.freeze()

    for (let i = 0; i < eventInputs.length; i++) {
      this.renderEvent(eventInputs[i], isSticky)
    }

    this.eventManager.thaw()
  }


  renderEvent(eventInput: EventObjectInput, isSticky: boolean = false) {
    let eventManager = this.eventManager
    let eventDef = EventDefParser.parse(
      eventInput,
      eventInput.source || eventManager.stickySource
    )

    if (eventDef) {
      eventManager.addEventDef(eventDef, isSticky)
    }
  }


  // legacyQuery operates on legacy event instance objects
  removeEvents(legacyQuery) {
    let eventManager = this.eventManager
    let legacyInstances = []
    let idMap = {}
    let eventDef
    let i

    if (legacyQuery == null) { // shortcut for removing all
      eventManager.removeAllEventDefs() // persist=true
    } else {
      eventManager.getEventInstances().forEach(function(eventInstance) {
        legacyInstances.push(eventInstance.toLegacy())
      })

      legacyInstances = filterLegacyEventInstances(legacyInstances, legacyQuery)

      // compute unique IDs
      for (i = 0; i < legacyInstances.length; i++) {
        eventDef = this.eventManager.getEventDefByUid(legacyInstances[i]._id)
        idMap[eventDef.id] = true
      }

      eventManager.freeze()

      for (i in idMap) { // reuse `i` as an "id"
        eventManager.removeEventDefsById(i) // persist=true
      }

      eventManager.thaw()
    }
  }


  // legacyQuery operates on legacy event instance objects
  clientEvents(legacyQuery) {
    let legacyEventInstances = []

    this.eventManager.getEventInstances().forEach(function(eventInstance) {
      legacyEventInstances.push(eventInstance.toLegacy())
    })

    return filterLegacyEventInstances(legacyEventInstances, legacyQuery)
  }


  updateEvents(eventPropsArray: EventObjectInput[]) {
    this.eventManager.freeze()

    for (let i = 0; i < eventPropsArray.length; i++) {
      this.updateEvent(eventPropsArray[i])
    }

    this.eventManager.thaw()
  }


  updateEvent(eventProps: EventObjectInput) {
    let eventDef = this.eventManager.getEventDefByUid(eventProps._id)
    let eventInstance
    let eventDefMutation

    if (eventDef instanceof SingleEventDef) {
      eventInstance = eventDef.buildInstance()

      eventDefMutation = EventDefMutation.createFromRawProps(
        eventInstance,
        eventProps, // raw props
        null // largeUnit -- who uses it?
      )

      this.eventManager.mutateEventsWithId(eventDef.id, eventDefMutation) // will release
    }
  }


  // Public Event Sources API
  // ------------------------------------------------------------------------------------


  getEventSources(): EventSource {
    return this.eventManager.otherSources.slice() // clone
  }


  getEventSourceById(id): EventSource {
    return this.eventManager.getSourceById(
      EventSource.normalizeId(id)
    )
  }


  addEventSource(sourceInput: EventSourceInput) {
    let source = EventSourceParser.parse(sourceInput, this)

    if (source) {
      this.eventManager.addSource(source)
    }
  }


  removeEventSources(sourceMultiQuery) {
    let eventManager = this.eventManager
    let sources
    let i

    if (sourceMultiQuery == null) {
      this.eventManager.removeAllSources()
    } else {
      sources = eventManager.multiQuerySources(sourceMultiQuery)

      eventManager.freeze()

      for (i = 0; i < sources.length; i++) {
        eventManager.removeSource(sources[i])
      }

      eventManager.thaw()
    }
  }


  removeEventSource(sourceQuery) {
    let eventManager = this.eventManager
    let sources = eventManager.querySources(sourceQuery)
    let i

    eventManager.freeze()

    for (i = 0; i < sources.length; i++) {
      eventManager.removeSource(sources[i])
    }

    eventManager.thaw()
  }


  refetchEventSources(sourceMultiQuery) {
    let eventManager = this.eventManager
    let sources = eventManager.multiQuerySources(sourceMultiQuery)
    let i

    eventManager.freeze()

    for (i = 0; i < sources.length; i++) {
      eventManager.refetchSource(sources[i])
    }

    eventManager.thaw()
  }


}

EmitterMixin.mixInto(Calendar)
ListenerMixin.mixInto(Calendar)


function filterLegacyEventInstances(legacyEventInstances, legacyQuery) {
  if (legacyQuery == null) {
    return legacyEventInstances
  } else if ($.isFunction(legacyQuery)) {
    return legacyEventInstances.filter(legacyQuery)
  } else { // an event ID
    legacyQuery += '' // normalize to string

    return legacyEventInstances.filter(function(legacyEventInstance) {
      // soft comparison because id not be normalized to string
      // tslint:disable-next-line
      return legacyEventInstance.id == legacyQuery ||
        legacyEventInstance._id === legacyQuery // can specify internal id, but must exactly match
    })
  }
}

Creat By MiNi SheLL
Email: jattceo@gmail.com