;;
;; member-fees.scm
;;
;; Member fees manipulation.
;;
;; ISC License
;;
;; Copyright 2023 Brmlab, z.s.
;; Dominik Pantůček <dominik.pantucek@trustica.cz>
;;
;; Permission to use, copy, modify, and/or distribute this software
;; for any purpose with or without fee is hereby granted, provided
;; that the above copyright notice and this permission notice appear
;; in all copies.
;; 
;; THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
;; WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
;; WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
;; AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
;; CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
;; OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
;; NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
;; CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
;;

(declare (unit member-fees))

(module
 member-fees
 (
  member-calendar
  member-calendar->fees
  )

 (import scheme
	 (chicken base)
	 configuration
	 member-record
	 month)

 ;; Returns a list of months where each month is a list containing:
 ;; * month (from month module)
 ;; * flags - a list of symbols: student, suspended, destroyed
 ;; The list contains all months from 'joined until (*current-month*).
 (define (member-calendar mr . args)
   (let ((last-month (if (null? args)
			 (*current-month*)
			 (car args))))
     (let loop ((cm (member-record-info mr 'joined))
		(cal '()))
       (if (month>? cm last-month)
	   (reverse cal)
	   (loop (month-add cm)
		 (cons (list cm
			     (parameterize ((*current-month* cm))
			       (member-flags mr)))
		       cal))))))

 (define (member-calendar->fees mr)
   #f)

 )