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/**
* @copyright 2021 Christoph Wurst <christoph@winzerhof-wurst.at>
*
* @author 2021 Christoph Wurst <christoph@winzerhof-wurst.at>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import { getClient } from '../dav/client'
import ICAL from 'ical.js'
import logger from './logger'
import { parseXML } from 'webdav/dist/node/tools/dav'
import { getZoneString } from 'icalzone'
import { v4 as uuidv4 } from 'uuid'
/**
*
*/
export function getEmptySlots() {
return {
MO: [],
TU: [],
WE: [],
TH: [],
FR: [],
SA: [],
SU: [],
}
}
/**
*
*/
export async function findScheduleInboxAvailability() {
const client = getClient('calendars')
const response = await client.customRequest('inbox', {
method: 'PROPFIND',
data: `<?xml version="1.0"?>
<x0:propfind xmlns:x0="DAV:">
<x0:prop>
<x1:calendar-availability xmlns:x1="urn:ietf:params:xml:ns:caldav"/>
</x0:prop>
</x0:propfind>`,
})
const xml = await parseXML(response.data)
if (!xml) {
return undefined
}
const availability = xml?.multistatus?.response[0]?.propstat?.prop['calendar-availability']
if (!availability) {
return undefined
}
const parsedIcal = ICAL.parse(availability)
const vcalendarComp = new ICAL.Component(parsedIcal)
const vavailabilityComp = vcalendarComp.getFirstSubcomponent('vavailability')
let timezoneId
const timezoneComp = vcalendarComp.getFirstSubcomponent('vtimezone')
if (timezoneComp) {
timezoneId = timezoneComp.getFirstProperty('tzid').getFirstValue()
}
const availableComps = vavailabilityComp.getAllSubcomponents('available')
// Combine all AVAILABLE blocks into a week of slots
const slots = getEmptySlots()
availableComps.forEach((availableComp) => {
const start = availableComp.getFirstProperty('dtstart').getFirstValue().toJSDate()
const end = availableComp.getFirstProperty('dtend').getFirstValue().toJSDate()
const rrule = availableComp.getFirstProperty('rrule')
if (rrule.getFirstValue().freq !== 'WEEKLY') {
logger.warn('rrule not supported', {
rrule: rrule.toICALString(),
})
return
}
rrule.getFirstValue().getComponent('BYDAY').forEach(day => {
slots[day].push({
start,
end,
})
})
})
return {
slots,
timezoneId,
}
}
/**
* @param slots
* @param timezoneId
*/
export async function saveScheduleInboxAvailability(slots, timezoneId) {
const all = [...Object.keys(slots).flatMap(dayId => slots[dayId].map(slot => ({
...slot,
day: dayId,
})))]
const vcalendarComp = new ICAL.Component('vcalendar')
vcalendarComp.addPropertyWithValue('prodid', 'Nextcloud DAV app')
// Store time zone info
// If possible we use the info from a time zone database
const predefinedTimezoneIcal = getZoneString(timezoneId)
if (predefinedTimezoneIcal) {
const timezoneComp = new ICAL.Component(ICAL.parse(predefinedTimezoneIcal))
vcalendarComp.addSubcomponent(timezoneComp)
} else {
// Fall back to a simple markup
const timezoneComp = new ICAL.Component('vtimezone')
timezoneComp.addPropertyWithValue('tzid', timezoneId)
vcalendarComp.addSubcomponent(timezoneComp)
}
// Store availability info
const vavailabilityComp = new ICAL.Component('vavailability')
// Deduplicate by start and end time
const deduplicated = all.reduce((acc, slot) => {
const key = [
slot.start.getHours(),
slot.start.getMinutes(),
slot.end.getHours(),
slot.end.getMinutes(),
].join('-')
return {
...acc,
[key]: [...(acc[key] ?? []), slot],
}
}, {})
// Create an AVAILABILITY component for every recurring slot
Object.keys(deduplicated).map(key => {
const slots = deduplicated[key]
const start = slots[0].start
const end = slots[0].end
// Combine days but make them also unique
const days = slots.map(slot => slot.day).filter((day, index, self) => self.indexOf(day) === index)
const availableComp = new ICAL.Component('available')
// Define DTSTART and DTEND
const startTimeProp = availableComp.addPropertyWithValue('dtstart', ICAL.Time.fromJSDate(start, false))
startTimeProp.setParameter('tzid', timezoneId)
const endTimeProp = availableComp.addPropertyWithValue('dtend', ICAL.Time.fromJSDate(end, false))
endTimeProp.setParameter('tzid', timezoneId)
// Add mandatory UID
availableComp.addPropertyWithValue('uid', uuidv4())
// TODO: add optional summary
// Define RRULE
availableComp.addPropertyWithValue('rrule', {
freq: 'WEEKLY',
byday: days,
})
return availableComp
}).map(vavailabilityComp.addSubcomponent.bind(vavailabilityComp))
vcalendarComp.addSubcomponent(vavailabilityComp)
logger.debug('New availability ical created', {
asObject: vcalendarComp,
asString: vcalendarComp.toString(),
})
const client = getClient('calendars')
await client.customRequest('inbox', {
method: 'PROPPATCH',
data: `<?xml version="1.0"?>
<x0:propertyupdate xmlns:x0="DAV:">
<x0:set>
<x0:prop>
<x1:calendar-availability xmlns:x1="urn:ietf:params:xml:ns:caldav">${vcalendarComp.toString()}</x1:calendar-availability>
</x0:prop>
</x0:set>
</x0:propertyupdate>`,
})
}
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