153 lines
4.6 KiB
Scheme
153 lines
4.6 KiB
Scheme
;;
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;; member-file.scm
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;;
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;; Member file parsing.
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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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(module
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member-file
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(
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load-member-file
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member-file-tests!
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)
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(import scheme
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(chicken base)
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(chicken string)
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(chicken io)
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dictionary
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month
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period
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testing)
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;; Specification of known keys for various types of parsing
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(define known-keys '(nick mail phone name born joined))
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(define start/stop-keys '(student suspend))
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(define multi-keys '(card desfire credit))
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;; Member File Parser: remove comments from line and return the result
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(define (line-remove-comments l)
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(let ((si (substring-index "#" l)))
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(if si
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(if (= si 0)
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""
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(car (string-chop l si)))
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l)))
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;; Parses given key-value line. Key is up to first space, value is the
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;; rest of the line. If the line doesn't contain anything, returns #f.
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(define (parse-member-line l)
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(let ((sp (string-split (line-remove-comments l) " ")))
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(and sp
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(not (null? sp))
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(list (string->symbol (car sp))
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(string-intersperse (cdr sp))))))
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;; If given symbol represents start/stop symbol of either kind,
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;; returns a list of the symbol representing the type and start/stop
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;; symbol. It returns false otherwise.
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(define (split-start/stop-symbol s)
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(cond ((eq? s 'studentstart) '(student start))
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((eq? s 'studentstop) '(student stop))
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((eq? s 'suspendstart) '(suspend start))
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((eq? s 'suspendstop) '(suspend stop))
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(else #f)))
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;; Processes member line adding given value v to the dictionary d
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;; under key k. Special handling for start/stop symbols means given
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;; value is prepended to given start/stop key (student/suspend) as
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;; parsed month for later processing of student/suspend periods.
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(define (process-member-line d k v)
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(let ((ss (split-start/stop-symbol k)))
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(if ss
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(let ((pk (car ss))
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(pd (cadr ss))
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(vl (string-split v " ")))
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(if (null? vl)
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(error 'process-member-line "Missing date for start/stop symbol" k)
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(let ((ds (car vl)))
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(dict-set d pk
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(cons (cons pd (string->month ds))
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(dict-ref d pk '()))))))
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(case k
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((card desfire credit) (dict-set d k (cons v (dict-ref d k '()))))
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(else
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(dict-set d k v))))))
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;; Converts given key in member info dictionary from period markers
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;; list to periods.
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(define (convert-member-key:markers->periods m k)
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(dict-set m k
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(period-markers->periods
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(sort-period-markers
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(dict-ref m k '())))))
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;; Converts all given keys using period-markers->periods.
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(define (convert-member-keys:markers->periods m . ks)
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(let loop ((m m)
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(ks ks))
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(if (null? ks)
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m
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(loop (convert-member-key:markers->periods m (car ks))
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(cdr ks)))))
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;; Fills-in the defaults
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(define (make-default-member-info)
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(dict-set
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(make-dict)
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'joined
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"2015-01"))
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;; Processes all lines and returns a dictionary representing given
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;; member.
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(define (parse-member-lines ls)
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(let loop ((ls ls)
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(r (make-default-member-info))
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(line-number 1))
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(if (null? ls)
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(convert-member-keys:markers->periods r 'suspend 'student)
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(let ((p (parse-member-line (car ls))))
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(loop (cdr ls)
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(if p
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(apply process-member-line r p)
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r)
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(+ line-number 1))))))
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;; Loads lines from given file and parses them.
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(define (load-member-file ffn)
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(let* ((f (open-input-file ffn))
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(ls (read-lines f))
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(md (parse-member-lines ls)))
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(display ".")
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md))
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;; Performs self-tests of the member-file module.
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(define (member-file-tests!)
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(run-tests
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member-file
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(test-equal? line-remove-comments (line-remove-comments "# all comment") "")
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(test-equal? line-remove-comments (line-remove-comments "") "")
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(test-equal? line-remove-comments (line-remove-comments "test # comment") "test ")
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(test-equal? line-remove-comments (line-remove-comments "test") "test")
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))
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)
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