132 lines
3.8 KiB
Scheme
132 lines
3.8 KiB
Scheme
;;
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;; member-fees.scm
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;;
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;; Member fees manipulation.
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;;
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;; ISC License
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;;
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;; Copyright 2023 Brmlab, z.s.
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;; Dominik Pantůček <dominik.pantucek@trustica.cz>
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;;
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;; Permission to use, copy, modify, and/or distribute this software
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;; for any purpose with or without fee is hereby granted, provided
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;; that the above copyright notice and this permission notice appear
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;; in all copies.
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;;
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;; THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
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;; WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
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;; WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
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;; AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
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;; CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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;; OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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;; NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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;; CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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;;
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(declare (unit member-fees))
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(module
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member-fees
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(
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member-calendar
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member-calendar-first-month
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member-calendar-last-month
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member-calendar-query
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member-calendar->years-table
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member-calendar->fees
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)
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(import scheme
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(chicken base)
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configuration
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member-record
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month
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ansi)
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;; Returns a list of months where each month is a list containing:
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;; * month (from month module)
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;; * flags - a list of symbols: student, suspended, destroyed
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;; The list contains all months from 'joined until (*current-month*).
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(define (member-calendar mr . args)
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(let ((last-month (if (null? args)
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(*current-month*)
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(car args))))
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(let loop ((cm (member-record-info mr 'joined))
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(cal '()))
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(if (month>? cm last-month)
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(reverse cal)
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(loop (month-add cm)
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(cons (list cm
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(parameterize ((*current-month* cm))
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(member-flags mr)))
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cal))))))
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;; Returns the first month of the calendar
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(define (member-calendar-first-month mc)
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(caar mc))
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;; Returns the last month of the calendar
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(define (member-calendar-last-month mc)
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(caar (reverse mc)))
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;; Returns the calendar entry which matches given month or #f if none
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;; found.
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(define (member-calendar-query mc m)
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(assoc m mc))
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;; Formats the calendar entry for visualization
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(define (member-calendar-entry->string e)
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(if e
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(if (member 'existing (cadr e))
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(if (member 'suspended (cadr e))
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(ansi-string #:bgdarkgrey " ") ; Suspended
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(if (member 'destroyed (cadr e))
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(ansi-string #:bgblack "~~~") ; Destroyed
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(if (member 'student (cadr e))
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(ansi-string #:bgyellow " ") ; Student
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(ansi-string #:bggreen " ")))) ; Normal
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" ") ; Nonexistent - should not happen
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" ")) ; Nonexistent
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;; Converts the entry into the fee
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(define (member-calendar-entry->fee e)
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(if e
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(if (member 'existing (cadr e))
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(if (member 'suspended (cadr e))
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0 ; Suspended
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(if (member 'destroyed (cadr e))
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0 ; Destroyed
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(if (member 'student (cadr e))
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250 ; Student
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500))) ; Normal
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0) ; Nonexistent - should not happen
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0)) ; Nonexistent
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;; Converts the calendar into a table where rows represent years and
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;; contain the year in the first cell and 12 cells for months after
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;; it.
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(define (member-calendar->years-table mc)
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(let* ((fm (member-calendar-first-month mc))
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(lm (member-calendar-last-month mc))
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(fy (month-year fm))
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(ly (month-year lm)))
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(let loop ((y fy)
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(rows '()))
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(if (> y ly)
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(reverse rows)
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(loop (add1 y)
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(cons (let mloop ((m 1)
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(row (list y)))
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(if (> m 12)
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(reverse row)
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(mloop (add1 m)
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(cons (member-calendar-entry->string
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(member-calendar-query mc (make-month y m)))
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row))))
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rows))))))
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;; Converts the whole calendar into a list of amounts (fees)
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(define (member-calendar->fees mc)
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(map member-calendar-entry->fee mc))
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)
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