Kiwimix (calendar mixer)

Swiss knife for ical & caldav calendars

Roadmap

Read a calendar

Access to calendar

• ❌ access to public calendar
• ❌ access to private calendar (with credentials)
• ❌ with data from config file with multiple calendars

Download calendar events locally

• ❌ choose source calendar
• ❌ as separate files ?
• ❌ as an in-memory database ?

Merge events

• ❌ merge overlapping events
• ❌ keep reference to source-calendars/parent-events (meta-data? external?)
• ❌ make selected event (source calendar? pattern?) private or anonymous

Upload calendar events remotely

• ❌ associate mixed local with remote target calendar
• ❌ handle event ids & duplicates

Web I

• ❌ split into library + CLI util
• ❌ write an API for the lib
• ❌ add a web frontend
• ❌ add user management & multi-account

Serve calendar locally

• ❌ provide caldav urls for generated calendars

Find free time

kiwimix generate \
    --from-date XXX --to-date YYY \
    --from-time 9:00 --to-time 19:00 \
    | kiwimix substract - agenda.ics \

Find free time for a meeting

kiwimix generate \
    --from-date XXX --to-date YYY \
    --from-time 9:00 --to-time 19:00 \
    > full.ics
kiwimix union alice.ics bob.ics \
    > events.ics
kiwimix substract full.ics events.ics \
    > free.ics

Rewrite events

kiwimix filter --merge alice.ics \
  | kiwimix filter --anonymize - \

V2 (with stack support)

kiwimix 
  generate --....     # generate X calendar & push
  @ read alice          # push alice.ics 
  @ filter --merge      # pop alice, filter & push
  @ filter --anonymize  # pop alice, filter & push
  @ read bob            # push bob.ics 
  @ filter --merge      # pop bob, filter & push
  @ filter --anonymize  # pop bob, filter & push
  @ union               # pop bob, pop alice, compute alice - bob
  @ substract           # pop bob, pop alice, compute alice - bob


kiwimix filter --anonymize --merge alice.ics
kiwimix load bob.ics ! anonymize ! merge

References

• https://github.com/PuloV/ics-golang => features missing but the code is OK
• https://github.com/apognu/gocal => poorly coded
• https://github.com/samedi/caldav-go
• https://github.com/emersion/go-webdav