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import Calendar from '../Calendar'
import reduceEventSources from './eventSources'
import reduceEventStore from './eventStore'
import { DateProfile, isDateProfilesEqual } from '../DateProfileGenerator'
import { DateSpan } from '../structs/date-span'
import { EventInteractionState } from '../interactions/event-interaction-state'
import { CalendarState, Action } from './types'
import { EventSourceHash } from '../structs/event-source'
import { DateMarker } from '../datelib/marker'
import { rangeContainsMarker } from '../datelib/date-range'
export default function(state: CalendarState, action: Action, calendar: Calendar): CalendarState {
let viewType = reduceViewType(state.viewType, action)
let dateProfile = reduceDateProfile(state.dateProfile, action, state.currentDate, viewType, calendar)
let eventSources = reduceEventSources(state.eventSources, action, dateProfile, calendar)
let nextState = {
...state,
viewType,
dateProfile,
currentDate: reduceCurrentDate(state.currentDate, action, dateProfile),
eventSources,
eventStore: reduceEventStore(state.eventStore, action, eventSources, dateProfile, calendar),
dateSelection: reduceDateSelection(state.dateSelection, action, calendar),
eventSelection: reduceSelectedEvent(state.eventSelection, action),
eventDrag: reduceEventDrag(state.eventDrag, action, eventSources, calendar),
eventResize: reduceEventResize(state.eventResize, action, eventSources, calendar),
eventSourceLoadingLevel: computeLoadingLevel(eventSources),
loadingLevel: computeLoadingLevel(eventSources)
}
for (let reducerFunc of calendar.pluginSystem.hooks.reducers) {
nextState = reducerFunc(nextState, action, calendar)
}
// console.log(action.type, nextState)
return nextState
}
function reduceViewType(currentViewType: string, action: Action): string {
switch (action.type) {
case 'SET_VIEW_TYPE':
return action.viewType
default:
return currentViewType
}
}
function reduceDateProfile(currentDateProfile: DateProfile | null, action: Action, currentDate: DateMarker, viewType: string, calendar: Calendar): DateProfile {
let newDateProfile: DateProfile
switch (action.type) {
case 'PREV':
newDateProfile = calendar.dateProfileGenerators[viewType].buildPrev(currentDateProfile, currentDate)
break
case 'NEXT':
newDateProfile = calendar.dateProfileGenerators[viewType].buildNext(currentDateProfile, currentDate)
break
case 'SET_DATE':
if (
!currentDateProfile.activeRange ||
!rangeContainsMarker(currentDateProfile.currentRange, action.dateMarker)
) {
newDateProfile = calendar.dateProfileGenerators[viewType].build(
action.dateMarker,
undefined,
true // forceToValid
)
}
break
case 'SET_VIEW_TYPE':
let generator = calendar.dateProfileGenerators[viewType]
if (!generator) {
throw new Error(
viewType ?
'The FullCalendar view "' + viewType + '" does not exist. Make sure your plugins are loaded correctly.' :
'No available FullCalendar view plugins.'
)
}
newDateProfile = generator.build(
action.dateMarker || currentDate,
undefined,
true // forceToValid
)
break
}
if (
newDateProfile &&
newDateProfile.isValid &&
!(currentDateProfile && isDateProfilesEqual(currentDateProfile, newDateProfile))
) {
return newDateProfile
} else {
return currentDateProfile
}
}
function reduceCurrentDate(currentDate: DateMarker, action: Action, dateProfile: DateProfile): DateMarker {
switch (action.type) {
case 'PREV':
case 'NEXT':
if (!rangeContainsMarker(dateProfile.currentRange, currentDate)) {
return dateProfile.currentRange.start
} else {
return currentDate
}
case 'SET_DATE':
case 'SET_VIEW_TYPE':
let newDate = action.dateMarker || currentDate
if (dateProfile.activeRange && !rangeContainsMarker(dateProfile.activeRange, newDate)) {
return dateProfile.currentRange.start
} else {
return newDate
}
default:
return currentDate
}
}
function reduceDateSelection(currentSelection: DateSpan | null, action: Action, calendar: Calendar) {
switch (action.type) {
case 'SELECT_DATES':
return action.selection
case 'UNSELECT_DATES':
return null
default:
return currentSelection
}
}
function reduceSelectedEvent(currentInstanceId: string, action: Action): string {
switch (action.type) {
case 'SELECT_EVENT':
return action.eventInstanceId
case 'UNSELECT_EVENT':
return ''
default:
return currentInstanceId
}
}
function reduceEventDrag(currentDrag: EventInteractionState | null, action: Action, sources: EventSourceHash, calendar: Calendar): EventInteractionState | null {
switch (action.type) {
case 'SET_EVENT_DRAG':
let newDrag = action.state
return {
affectedEvents: newDrag.affectedEvents,
mutatedEvents: newDrag.mutatedEvents,
isEvent: newDrag.isEvent,
origSeg: newDrag.origSeg
}
case 'UNSET_EVENT_DRAG':
return null
default:
return currentDrag
}
}
function reduceEventResize(currentResize: EventInteractionState | null, action: Action, sources: EventSourceHash, calendar: Calendar): EventInteractionState | null {
switch (action.type) {
case 'SET_EVENT_RESIZE':
let newResize = action.state
return {
affectedEvents: newResize.affectedEvents,
mutatedEvents: newResize.mutatedEvents,
isEvent: newResize.isEvent,
origSeg: newResize.origSeg
}
case 'UNSET_EVENT_RESIZE':
return null
default:
return currentResize
}
}
function computeLoadingLevel(eventSources: EventSourceHash): number {
let cnt = 0
for (let sourceId in eventSources) {
if (eventSources[sourceId].isFetching) {
cnt++
}
}
return cnt
}