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#!/bin/env zsh
# All arguments are joined with spaces and inserted into the calendar
# file at the appropriate point.
#
# While the function compares the date of the new entry with dates in the
# existing calendar file, it does not do any sorting; it inserts the new
# entry before the first existing entry with a later date and time.
emulate -L zsh
setopt extendedglob
local calendar newfile REPLY lastline opt
local -a calendar_entries lockfiles
integer my_date done rstat nolock nobackup
autoload -U calendar_{read,lockfiles,scandate}
while getopts "BL" opt; do
case $opt in
(B)
nobackup=1
;;
(L)
nolock=1
;;
(*)
return 1
;;
esac
done
shift $(( OPTIND - 1 ))
# Read the calendar file from the calendar-file style
zstyle -s ':datetime:calendar_add:' calendar-file calendar ||
calendar=~/calendar
newfile=$calendar.new.$HOST.$$
if ! calendar_scandate -a "$*"; then
print "$0: failed to parse date/time" >&2
return 1
fi
(( my_date = $REPLY ))
# $calendar doesn't necessarily exist yet.
local -a match mbegin mend
local my_uid their_uid
# Match a UID, a unique identifier for the entry inherited from
# text/calendar format.
local uidpat='(|*[[:space:]])UID[[:space:]]##(#b)([[:xdigit:]]##)(|[[:space:]]*)'
if [[ "$*" = ${~uidpat} ]]; then
my_uid=$match[1]
fi
# start of block for following always to clear up lockfiles.
{
(( nolock )) || calendar_lockfiles $calendar || return 1
if [[ -f $calendar ]]; then
calendar_read $calendar
{
for line in $calendar_entries; do
if (( ! done )) && calendar_scandate -a $line && (( REPLY > my_date )); then
print -r -- "$*"
(( done = 1 ))
fi
# Don't save this entry if it has the same UID as the new one.
if [[ -n $my_uid && $line = ${~uidpat} ]]; then
their_uid=$match[1]
[[ ${(U)my_uid} = ${(U)their_uid} ]] && continue
fi
if [[ $REPLY -eq $my_date && $line = "$*" ]]; then
(( done )) && continue # paranoia: shouldn't happen
(( done = 1 ))
fi
print -r -- $line
done
(( done )) || print -r -- "$*"
} >$newfile
if (( ! nobackup )); then
if ! mv $calendar $calendar.old; then
print "Couldn't back up $calendar to $calendar.old.
New calendar left in $newfile." >&2
(( rstat = 1 ))
fi
fi
else
print -r -- $line >$newfile
fi
if (( !rstat )) && ! mv $newfile $calendar; then
print "Failed to rename $newfile to $calendar.
Old calendar left in $calendar.old." >&2
(( rstat = 1 ))
fi
} always {
(( ${#lockfiles} )) && rm -f $lockfiles
}
return $rstat
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