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Add ICS/webcal HTTP subscription calendars

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Users can now subscribe to a remote ICS/webcal feed from the dashboard
(name + color), the same way they set up a real calendar or the virtual
Birthdays calendar. Subscriptions are read-only, per-user, and share the
"/cal/home/<name>/" namespace with real calendars and "birthdays" (name
collisions are rejected in both directions).

- internal/db: new ics_subscriptions table + CRUD (internal/db/ics.go);
  CreateCalendarWithColor checks for a colliding subscription name.
- internal/icssub: shared HTTP-fetch + TTL cache (15 min) for remote ICS
  calendars, with webcal:// -> https:// rewriting and stale-on-error
  fallback, used by both the web UI and the CalDAV backend.
- internal/web: dashboard "Subscribe to an ICS/webcal calendar" form,
  color picker, delete button (internal/web/ics.go,
  templates/dashboard.templ); month view renders subscription events in
  their chosen color, read-only (internal/web/calendar.go).
- internal/caldav: subscriptions are exposed as read-only calendars
  (internal/caldav/ics.go) - listed in PROPFIND, events served via
  GET/REPORT, PUT/DELETE on individual events rejected with 403, but
  DELETE on the calendar itself unsubscribes; calendar-color is injected
  the same way as for real calendars and Birthdays.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
This commit is contained in:
arnef
2026-08-20 22:10:49 +02:00
co-authored by Copilot
parent 2cb6e98db6
commit 1707ab4060
12 changed files with 818 additions and 104 deletions
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internal/web/server.go
+9 -5
View File
@@ -12,20 +12,22 @@ import (
"github.com/yourusername/caldav-server/internal/config"
"github.com/yourusername/caldav-server/internal/db"
"github.com/yourusername/caldav-server/internal/icssub"
"github.com/yourusername/caldav-server/internal/store"
)
// Server holds the dependencies needed by the web UI handlers.
type Server struct {
cfg *config.Config
store *store.Store
dbase *db.DB
logger *slog.Logger
cfg *config.Config
store *store.Store
dbase *db.DB
logger *slog.Logger
icsCache *icssub.Cache
}
// NewServer constructs a web UI Server.
func NewServer(cfg *config.Config, st *store.Store, dbase *db.DB, logger *slog.Logger) *Server {
return &Server{cfg: cfg, store: st, dbase: dbase, logger: logger}
return &Server{cfg: cfg, store: st, dbase: dbase, logger: logger, icsCache: icssub.NewCache(icssub.DefaultTTL)}
}
// Handler returns the http.Handler serving the web UI, mounted at "/web/"
@@ -46,6 +48,8 @@ func (s *Server) Handler(staticFS http.FileSystem) http.Handler {
mux.HandleFunc("/resources/calendar/color", s.requireLogin(s.handleCalendarColor))
mux.HandleFunc("/resources/birthdays/color", s.requireLogin(s.handleBirthdayColor))
mux.HandleFunc("/resources/addressbook", s.requireLogin(s.handleAddressBookResource))
mux.HandleFunc("/resources/ics", s.requireLogin(s.handleICSResource))
mux.HandleFunc("/resources/ics/color", s.requireLogin(s.handleICSColor))
mux.HandleFunc("/files/{path...}", s.requireLogin(s.handleFiles))
mux.HandleFunc("/contacts", s.requireLogin(s.handleContactsHome))
mux.HandleFunc("/contacts/{book}", s.requireLogin(s.handleContactsList))