41 lines
2 KiB
EmacsLisp
41 lines
2 KiB
EmacsLisp
(defun fix-time-string (calendar-string)
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"If CALENDAR-STRING has no space between time and a.m./p.m., add a space."
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(replace-regexp-in-string "\\([[:digit:]]\\)\\([ap]\\)" "\\1 \\2" calendar-string))
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(defun is-pm (calendar-string)
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"Test if CALENDAR-STRING has PM/pm in it."
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(string-match-p "[Pp][Mm]" time-as-string))
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(defun is-hour-1-to-11 (a-calendar-list)
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"Test if hour in A-CALENDAR-LIST is between 1 and 11."
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(let ((hour-value))
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(setq hour-value (nth 2 a-calendar-list))
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(and (>= hour-value 1) (<= hour-value 11))))
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(defun adjust-if-pm (time-as-string)
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"If TIME-AS-STRING includes pm/PM, and hour is 1 to 11, add 12 hours.
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Return time as integer of seconds past the epoch."
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(let ((calendar-list)
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(temp-time-stamp)
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(time-stamp-as-integer))
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(setq calendar-list (parse-time-string time-as-string))
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(setq temp-time-stamp (encode-time calendar-list))
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(setq time-stamp-as-integer (time-convert temp-time-stamp 'integer))
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(if (and (is-pm time-as-string) (is-hour-1-to-11 calendar-list))
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(+ time-stamp-as-integer (* 12 60 60)) ; return time + 12 hours, so that hour is 13-23
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time-stamp-as-integer))) ; return time unchanged, leaving hour 0-12
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(defun add-seconds (start-time-stamp-integer number-of-seconds)
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"Add NUMBER-OF-HOURS to START-TIME-STAMP-INTEGER."
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(+ start-time-stamp-integer number-of-seconds))
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(defun calc-future-time (string-calendar-date number-of-seconds-in-future)
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"Calculate future time by adding NUMBER-OF-SECONDS-IN-FUTURE to STRING-CALENDAR-DATE ."
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(let ((fixed-calendar-string)
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(time-stamp-as-integer)
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(coded-current-time)
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(future-time-as-integer))
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(setq fixed-calendar-string (fix-time-string string-calendar-date))
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(setq time-stamp-as-integer (adjust-if-pm fixed-calendar-string))
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(setq future-time-as-integer (add-seconds time-stamp-as-integer number-of-seconds-in-future))
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(format-time-string "%B %e %Y %R %p %Z" future-time-as-integer)))
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