Remove old recurrence generator.

1 files changed, 0 insertions, 171 deletions

diff --git a/module/vcomponent/recurrence/generate.scm b/module/vcomponent/recurrence/generate.scm
deleted file mode 100644
index 70d21be1..00000000
--- a/module/vcomponent/recurrence/generate.scm
+++ /dev/null
@@ -1,171 +0,0 @@
-(define-module (vcomponent recurrence generate)
-  #:use-module ((srfi srfi-1) :select (find))
-  #:use-module (datetime)
-  #:use-module (datetime util)
-  #:use-module (srfi srfi-26)           ; Cut
-  #:use-module (srfi srfi-41)           ; Streams
-  #:use-module (ice-9 match)
-
-  #:use-module (util)
-  #:use-module (util exceptions)
-  #:use-module (vcomponent base)
-  #:use-module (vcomponent recurrence internal)
-  #:use-module (vcomponent recurrence parse)
-
-  #:export (generate-recurrence-set)
-  )
-
-;;; TODO implement
-;;; EXDATE and RDATE
-
-;;; EXDATE (3.8.5.1)
-;;; comma sepparated list of dates or datetimes.
-;;; Can have TZID parameter
-;;; Specifies list of dates that the event should not happen on, even
-;;; if the RRULE say so.
-;;; Can have VALUE field specifiying "DATE-TIME" or "DATE".
-
-;;; RDATE (3.8.5.2)
-;;; Comma sepparated list of dates the event should happen on.
-;;; Can have TZID parameter.
-;;; Can have VALUE parameter, specyfying "DATE-TIME", "DATE" or "PREIOD".
-;;; PERIOD (see 3.3.9)
-
-(define (seconds-in freq)
-  (case freq
-    ((SECONDLY) 1)
-    ((MINUTELY) 60)
-    ((HOURLY) (* 60 60))
-    ((DAILY) (* 60 60 24))
-    ((WEEKLY) (* 60 60 24 7))))
-
-;; Event x Rule → Event
-;; TODO My current naïve aproach to simple adding a constant time to an event
-;; breaks with time-zones. betwen 12:00 two adjacent days might NOT be 24h.
-;; Specifically, 23h or 25h when going between summer and "normal" time.
-
-(define (next-event ev r)
-  (let ((e (copy-vcomponent ev)))
-    (let-env ((TZ (and=> (prop (attr* e 'DTSTART) 'TZID) car)))
-
-             (let ((d (attr e 'DTSTART))
-                   (i (interval r)))
-
-               (let ((date-change (case (freq r)
-                                    ((DAILY)    (date day:    i))
-                                    ((WEEKLY)   (date day: (* i 7)))
-                                    ((MONTHLY)  (date month:  i))
-                                    ((YEARLY)   (date year:   i))
-                                    (else (date))))
-                     (time-change (case (freq r)
-                                    ((SECONDLY) (time second: i))
-                                    ((MINUTELY) (time minute: i))
-                                    ((HOURLY)   (time hour:   i))
-                                    (else (time)))))
-                (set! (attr e 'DTSTART)
-                  (if (date? d)
-                      (date+ d date-change)
-                      (datetime+ d (datetime date: date-change time: time-change)))))
-
-               #;
-               (set! (zone-offset d)    ;
-               (zone-offset (time-utc->date (date->time-utc d))))
-
-
-               (let ((start (attr e 'DTSTART))
-                     (end (attr e 'DTEND))
-                     (change (attr e 'X-HNH-DURATION)))
-                 (when end
-                   (set! (attr e 'DTEND)
-                     (if (date? start)
-                         (date+ start change)
-                         (datetime+ start change)))))))
-
-    e))
-
-;; BYDAY and the like depend on the freq?
-;; Line 7100
-;; Table @@ 2430
-;; 
-;; Event x Rule → Bool (continue?)
-;; Alternative, monadic solution using <optional>.
-;; @example
-;; (optional->bool
-;;  (do (<$> (cut time<=? (attr last 'DTSTART)) (until r))
-;;      (<$> (negate zero?) (count r))
-;;    (just #t)))
-;; @end example
-(define-stream (recur-event-stream event rule-obj)
-  (stream-unfold
-
-   ;; Event x Rule → Event
-   (match-lambda
-     ((e _)
-      (let ((expected-start (attr e 'DTSTART)))
-        ;; If we have alternatives, check them
-        (or (and=> (attr e 'X-HNH-ALTERNATIVES)
-                   (lambda (alternatives)
-                     ;; A recurrence id matching the expected time means that
-                     ;; we have an actuall alternative/exception, use that
-                     ;; instead of the regular event.
-                     ;; RFC 5545 3.8.4.4
-                     (find (lambda (alt) ((if (datetime? expected-start)
-                                         datetime= date=)
-                                     expected-start (attr alt 'RECURRENCE-ID)))
-                           alternatives)))
-            ;; If we did't have an exception just return the regular event.
-            e))))
-
-   ;; Event x Rule → Bool (continue?)
-   (match-lambda
-     ((e r)
-      (or (and (not (until r)) (not (count r)))                   ; Never ending
-          (and=> (count r) (negate zero?))                        ; COUNT
-          (and=> (until r) (lambda (dt) ((if (date? dt) date<= datetime<=) ; UNTIL
-                                    (attr e 'DTSTART) dt))))))
-
-   ;; Event x Rule → next (Event, Rule)
-   (match-lambda
-     ((e r)
-      (list (next-event e r)
-            (if (count r)
-                (set (count r) = (- 1))
-                r ))))
-
-   ;; Seed
-   (list event rule-obj)))
-
-
-(define (generate-recurrence-set event)
-  ;; TODO DURATION might be used for something else, check applicable types
-  ;; TODO Far from all events have DTEND
-  ;;      VTIMEZONE's always lack it.
-  (catch #t
-    (lambda ()
-     (if (not (attr event 'RRULE))
-         (stream event)
-         (begin
-           (set! (attr event 'X-HNH-DURATION)
-             (cond [(attr event 'DURATION) => identity]
-                   [(attr event 'DTEND)
-                    => (lambda (end)
-                         ;; The value type of dtstart and dtend must be the same
-                         ;; according to RFC 5545 3.8.2.2 (Date-Time End).
-                         (if (date? end)
-                             (date-difference end (attr event 'DTSTART))
-                             (datetime-difference end (attr event 'DTSTART))))]))
-           (if (attr event "RRULE")
-               (recur-event-stream
-                event (parse-recurrence-rule
-                       (attr event "RRULE")
-                       (if (date? (attr event 'DTSTART))
-                           parse-ics-date parse-ics-datetime)))
-               ;; TODO some events STANDARD and DAYLIGT doesn't have RRULE's, but rather
-               ;; just mention the current part. Handle this
-               stream-null))))
-    (lambda (err . args)
-      (warning "while parsing recurrence rule ~%~a ~s~%~a"
-               err args (attr event 'X-HNH-FILENAME))
-      (stream ; event
-       )
-      )))