Calendar integration

The ability to integrate a calendar into Centurion ERP and future features.

Requested features:

• Adding due dates to tickets

• Ability to set devices status on the calendar e.g down for maintenance, offline etc

• export calendar and add to other calendar services (google, outlook, home assistant).

• Set users status e.g busy, away

• Use the calendar to trigger automations e.g deploy software on a date

• relate: https://github.com/nofusscomputing/centurion_erp/issues/254

EoF OP

For the user to be able to forecast and plan, a calendar is a desired feature.

Details

Add the required features where each user can have their own calendar that they can use for planning. The calendar feature will be based off of RFC 5545 - iCalendar Specification. Add support for Components:

• VCALENDAR (The overall calendar container, required)
• VEVENT (Defines an event, e.g., a meeting or appointment)
• #254 VTODO (Defines a to-do task)
• VFREEBUSY (Defines free/busy time)
• VALARM (Defines an alarm or reminder)
• VAVAILABILITY (Defines an availability schedule)

Links

• RFC 5545 - iCalendar Specification

Features

• Support for VJOURNAL (Defines a journal entry) Component
  User Should have ability to add journal entries if they desire

• Ticket Due dates show on user calendar
  if user is assigned a ticket, add the ticket due date to the ticket.

• Event-Based Webhooks[^github-379]
  Based off of events, trigger outbound webhooks

Requirements

• Calendar permissions by user
• User can share calendar
• User can import via .ics file
• User Can import via CardDav Server
• CardDav Server Endpoint available
• Two-way sync
• Optional Read-Only endpoint available

[^github-379]: Blocked By: #379

Start by reading the linked RFC 5545 iCalendar Specification and the related issue #254. Define the scope across the listed calendar components, ticket due dates, webhooks, permissions, imports, CardDAV, and synchronization before implementation. Done means the agreed calendar capabilities and requirements are implemented and verified.