mirror of https://codeberg.org/cage/tinmop/
69 lines
2.0 KiB
Common Lisp
69 lines
2.0 KiB
Common Lisp
;; tinmop: a multiprotocol client
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;; Copyright © cage
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;; This program is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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(in-package :date-formatter)
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;; FORMAT := (FIELD | TEXT)*
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;; FIELD := [%hour %minute %second %month %year %day %weekday %%]
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;; TEXT := (not percent)+
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(defrule field
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(or "%hour"
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"%min"
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"%second"
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"%month"
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"%year"
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"%day"
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"%weekday"
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"%short-weekday"
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"%long-weekday"
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"%long-month"
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"%short-month"
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"%%")
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(:text t))
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(defrule text (+ (not percent))
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(:text t))
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(defrule format (* (or field text)))
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(defun expand-date-formatter-spec (spec)
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"Expand a date spec like '%year %short-month %day %hour:%min'
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to a list like '(:year :dhort-month :day :hour \":\" (:min 2))
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note that:
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- %% expands to \"%\"
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- %min expands to (:min 2)
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- %hour expands to (:hour 2)
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- %day expands to (:day 2)
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This list can be passed to misc:format-time to get a time string"
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(let ((parsed (parse 'format spec)))
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(loop for element in parsed collect
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(cond
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((string= element "%%")
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"%")
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((string= element "%min")
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'(:min 2))
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((string= element "%hour")
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'(:hour 2))
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((string= element "%day")
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'(:day 2))
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((scan "^%+" element)
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(make-keyword (string-upcase (subseq element 1))))
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(t
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element)))))
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