yad-calendar proposed update – Page 2

This topic has 30 replies, 7 voices, and was last updated Jan 21-3:19 pm by Brian Masinick.

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January 16, 2021 at 11:40 pm #50004

Moderator

BobC

Helpful

Sleep is a good thing. Yes, realistically, you just need to wait till the next alarm or end of day

January 17, 2021 at 6:34 am #50024

Anonymous

Helpful

ever heard about the “rtcwake” command? https://linux.die.net/man/8/rtcwake

You can use it to suspend your pc and then wake it up at a certain time- and yes, use a script, in conjunction with that, to play an audio file/video at a certain time

rtcwake [options] [-d device] [-m standby_mode] {-s seconds|-t time_t}

great tip !

January 17, 2021 at 3:06 pm #50030

Member

PPC

Helpful

Tiny change, with big usability implications:
I unified the calendar script with the alarm script. This means, that a single script is needed to have “antiX Calendar” and it’s event alarms. I did not incorporate the previous script that displayed the day’s events because I find that, with alarms correctly working, it’s not really needed. If someone wants that extra function, let me know and I’ll try to add it… After some rest, so, no promisses
To activate calendar alarms, run the name of the calendar script with the “–alarm” argument.
Example. Assumming your calendar script is called “antix-calendar.sh” and is placed in your home folder, to access the calendar just run this:

~/antix-calendar.sh

To activate alarms for calendar events run this:

~/antix-calendar.sh --alarm

Of course you can place, in your desktop’s start file this, to always have calendar alarms running (it takes about 700Kb of RAM, and no measurable CPU use)- If you have over 1 or 2 Gb of RAM, it’s safe to leave the script always running.

~/antix-calendar.sh --alarm &

Warning: terminating the “sleep” process will deactivate the calendar alarms, rerun the script with the appropriate flag to activate them again.

Now the code (otherwise the same as the previous version):

Enjoy and please report any bugs not related with lack of time field validation…
P.

#!/bin/bash
#Simple Calendar for antiX - dependencies: Yad. By PPC, GPL license, 15/01/2021. Please keep this line about Creator and license
export calendar_file="$HOME/yad-calendar.txt"
window_icon=/usr/share/icons/papirus-antix/22x22/apps/calendar.png
##Clean up calendar file (NOTE: because @ is a special character, in order for the sed comand to percieve it as an ordinary character, it has to be preceded by \, like so: "\@"):
#Remove all empty lines
sed -i '/^$/d' $calendar_file
#Remove all empty lines
sed -i '/^$/d' $calendar_file
#Remove lines with only date and nothing more (orphan lines)- it removes all lines with less than 10 characters
sed -i -r '/^.{,10}$/d' $calendar_file
#Replace "@@" with a simple "@"
sed -i -e 's/\@\@/\@/g'  $calendar_file
#Replace "@ @" with "@"
sed -i -e 's/\@ \@/\@/g'  $calendar_file
#Remove any "@" left at the end of any line
sed 's/\@$//' $calendar_file
#Remove any "@ " left at the end of any line
sed 's/\@ $//' $calendar_file

buzzer()
{
	clear
	echo "Sounding buzzer"
speaker-test --frequency 200 --test sine & sleep 2 && pkill speaker-test	
}

alarm ()
{
killall sleep
export -f buzzer
today=$(date '+%d/%m/%Y')
#read alarm and event from file $HOME/yad-calendar.txt (in format "dd/mm/YYY hh:mm event")
todays_events=$(grep $today $HOME/yad-calendar.txt |cut -d' ' -f1 --complement)
x=$(tr -dc '@' <<<"$todays_events" | awk '{ print length; }')
# echo The number of events for today is $x
let "x=x+2"
i=2
until [ $i -ge $x ]
do
 grep $today $HOME/yad-calendar.txt |cut -d@ -f$i |cut -d" " -f1
 target_time=$(grep ^$today $HOME/yad-calendar.txt |cut -d@ -f$i |cut -d" " -f1 |cut -d"-" -f1)
 event_description=$(grep $today $HOME/yad-calendar.txt |cut -d@ -f$i |cut -d" " -f2)
 initial_time=$(date +"%H":"%M":"%S")
 diference=$(echo "$target_time
 $initial_time" | 
  (read later_time; read former_time;
    former_seconds=$(date --date="$former_time" +%s);
    later_seconds=$(date --date="$later_time" +%s);
    echo $((later_seconds-former_seconds)) ))
 echo $diference
      if [ $diference -gt 0 ]	;	then
  		clear
  		echo "There are new alarms for today"
  		echo Next Alarm will sound in $diference seconds
  		nohup sleep $diference 
  	    buzzer & 
  	    notify-send "$target_time $event_description ..." &
  	    yad --center --width=300 --no-buttons --window-icon="/usr/share/icons/papirus-antix/22x22/apps/calendar.png" --title="antiX Calendar" --text="\n $target_time - $event_description ... \n" --text-align=center 
     fi
     ((i=i+1))
done
# The number below is how many seconds the script should wait before checking for future alarm times (default=30)
sleep 30 && $BASH_SOURCE --alarm &
}

Check_time ()
{
#Validate time format
time=$inicio
number_of_digits_in_time=$(echo -n "time" | wc -c)
time_check="good"
#Only procede if there's a initial time entered- to allow adding directly "all day events"
#check is "time" value exists, store result in "time_inputed"
[[ ! -z "$inicio" ]] && time_inputed=1 ||  time_inputed=0
if [ $time_inputed -eq 1 ];then
echo "USer entered start time, it's not an all day event, check if time is valid"
hour=$(echo $time |cut -d':' -f1)
number_of_digits_in_hour=$(echo -n "$hour" | wc -c)
##echo $number_of_digits_in_hour
if [ "$number_of_digits_in_hour" -lt 2 ] ; then
hour=$(echo 0$hour)
fi
if [ "$hour" -lt 24 ] ; then
 echo "Valid time pattern"
 #hour is ok, checking minutes
 minute=$(echo $time |cut -d':' -f2)
 number_of_digits_in_minute=$(echo -n "$minute" | wc -c)
## echo $number_of_digits_in_minute
 if [ "$number_of_digits_in_minute" -lt 2 ] ; then
   hour=$(echo 0$minute)
 fi
 if [ "$minute" -lt 60 ] ; then
	echo "Valid time pattern"
	else
##	 echo "InValid time pattern"
export	time_check="bad"
 fi
 else
##	echo "InValid time pattern"
export	time_check="bad"
fi
fi
}

Adicionar_evento ()
{
# Empty day, add an event
entrada=$(yad --window-icon=$window_icon --title="$day" --center --form --field="Event:" --field="Start (optional):" --field="End (optional):" "$evento" "$inicio" "")
echo Selected: $evento_a_editar
export inicio=$(echo $entrada |cut -d'|' -f2)
evento=$(echo $entrada |cut -d'|' -f1)
export fim=$(echo $entrada |cut -d'|' -f3)

Check_time inicio

 if [ $time_check == "bad" ]
	then
      echo "time not ok "
      yad --center --window-icon=$window_icon --title="antiX Calendar" --text=" Incorrect time entered \n Enter a time between 00:00 and 23:59 " --button="X":1 --button="OK":2
		foo=$?
		if [[ $foo -eq 1 ]]; then
			exit
		fi
		if [[ $foo -eq 2 ]]; then
			 inicio=$(echo $inicio |cut -d' ' -f2)
			 fim=$(echo $inicio |cut -d' ' -f3)
			 Adicionar_evento
		fi          
 fi
#add "@" before the start time
[[ ! -z "$inicio" ]] && inicio=$(echo \@ $inicio)
#Add indication of end of event only if "end" was inputed
[[ ! -z "$fim" ]] && inicio=$(echo $inicio-$fim)
#Save entered data to file
echo $day $inicio $evento >> $HOME/yad-calendar.txt
exit
}

Editar_evento(){
# Day with existing event(s)
#Create array of the day's event(s)
entrada=$(grep -h $day $calendar_file)
reminder_time=$(echo $entrada|cut -d' ' -f2)
reminder_date=$(echo $entrada|cut -d' ' -f1)
line=($(grep -n $day $calendar_file | head -n 1 | cut -d: -f1))
eventos_existentes=$(grep $day $calendar_file |cut -d' ' -f1 --complement)
#Count existing timed events (indicated by "@", so, count "@" signs
x=$(tr -dc '@' <<<"$eventos_existentes" | awk '{ print length; }')
echo The number of events for the day is $x
let "x=x+2"
numero_de_eventos_no_dia=$(tr -dc '@' <<<"$eventos_existentes" | awk '{ print length; }')
#clean temporary file
echo "" > /tmp/listar_eventos_do_dia
##loop to check for each timed event, add each event to a different line of the temp file
i=1
until [ $i -ge $x ]
do
grep $day $calendar_file |cut -d@ -f$i >> /tmp/listar_eventos_do_dia
  ((i=i+1))
done
#remove empty lines
sed -i '/^$/d' /tmp/listar_eventos_do_dia
#list that day's event(s) in a yad window:
evento_a_editar=$(yad --window-icon=$window_icon --title="$day"  --button="+":2 --width=550 --height=550 --center --separator=" " --list  --column="Double click an event to edit or cancel it, double click date to add an all day event"  < /tmp/listar_eventos_do_dia)
foo=$?
echo Selected: $evento_a_editar

#START GUI to add (timed) event:
if [[ $foo -eq 2 ]]; then

#process result of user entry:
date=$day
input=$(yad --window-icon=$window_icon --title="$day" --center --form --field="Event" --field=Start --field="End (optional)")
export start=$(echo $input |cut -d'|' -f2)
event=$(echo $input |cut -d'|' -f1)
export end=$(echo $input |cut -d'|' -f3)

##### TO DO - time validation not working here!!!!!!!!!!!!!!!1
echo $start
Check_time $start
 if [ $time_check == "bad" ]
	then
      echo "time not ok "
      yad --center --window-icon=$window_icon --title="antiX Calendar" --text=" Incorrect time entered \n Enter a time between 00:00 and 23:59 " --button="X":1 --button="OK":2
		foo=$?
		if [[ $foo -eq 1 ]]; then
			exit
		fi
		if [[ $foo -eq 2 ]]; then
			 Editar_evento
		fi          
 fi

edited_day=$(echo $current_day @$start $event)

#Generate list of current day's events (withouy all day events), in file /tmp/listar_eventos_do_dia
eventos_existentes=$(grep ^$day $calendar_file |cut -d' ' -f1 --complement)
echo $eventos_existentes
x=$(tr -dc '@' <<<"$eventos_existentes" | awk '{ print length; }')
echo O Numero de Eventos no dia em causa é $x
let "x=x+2"
#Count envents (each @ sign)
numero_de_eventos_no_dia=$(tr -dc '@' <<<"$eventos_existentes" | awk '{ print length; }')
echo "" > /tmp/listar_eventos_do_dia
i=2
#loop to add events to temporary file
until [ $i -ge $x ]
do
grep $day $calendar_file |cut -d@ -f$i >> /tmp/listar_eventos_do_dia
  ((i=i+1))
done
#Remove empty lines
sed -i '/^$/d' /tmp/listar_eventos_do_dia

#add new entry to the end of the file
input=$edited_day   ##############################simulate user input
echo $input >> /tmp/listar_eventos_do_dia

cat /tmp/listar_eventos_do_dia

####Put events in correct order
date_and_all_day_events=$(egrep "^$day " $calendar_file |cut -d'@' -f1)
sort /tmp/listar_eventos_do_dia > /tmp/temp0.txt
tac /tmp/temp0.txt > /tmp/temp1.txt
echo $date_and_all_day_events >> /tmp/temp1.txt
tac /tmp/temp1.txt > /tmp/listar_eventos_do_dia_editados
sed -i '/^$/d' /tmp/listar_eventos_do_dia_editados
# New event's list, starting with date (and eventual all day's events) followed by timed events, in /tmp/listar_eventos_do_dia_editados

###Create line from /tmp/listar_eventos_do_dia_editados
#Start by adding " @" at the begining of each line
sed -i -e 's/^/ @/' /tmp/listar_eventos_do_dia_editados
#Remove " @" from first line (date and eventual all day events)- it's the 2 first characters, so, repeat sed command 
sed -i '1s/^.//' /tmp/listar_eventos_do_dia_editados
sed -i '1s/^.//' /tmp/listar_eventos_do_dia_editados
#Generate line from temporary file
export linha_nova=$(tr -d '\n' < /tmp/listar_eventos_do_dia_editados)
echo "Current day's entry will be:"
echo $linha_nova

###Save changes in correct day
export day
export ENTRADA_ATUAL=$(egrep "^$day " $calendar_file)
while read -r line; do
linha_nova=$(tr -d '\n' < /tmp/listar_eventos_do_dia_editados)
printf "%s\n" "${line/"${ENTRADA_ATUAL}"/"${linha_nova}"}"
done < $calendar_file > ~/file.new
#Replace "@@" with a simple "@"
sed -i -e 's/\@\@/\@/g'  ~/file.new
cat ~/file.new
## exit ##### STOP test HERE, dont edit real file ###############
cp ~/file.new $calendar_file
echo Generated entry for $day is
egrep "^$day "  $calendar_file 
exit
fi
##END

##END of GUI to add (timed) event

### Process click in event from list:
entrada=$(grep -h $day $calendar_file)
echo Entrada completa a ser editada:
echo $entrada
echo Evento a editar:
echo $evento_a_editar

if [ -z "${evento_a_editar}" ]; then
    echo "No event selected for edition, exiting"
    exit
fi

input=$evento_a_editar
echo $input > /tmp/tempor1
evento_a_editar=$(cat /tmp/tempor1 |cut -d'|' -f1)
input2=$(yad --window-icon=$window_icon --center --title="$day" --form --field="" "$evento_a_editar")
echo $input2 > /tmp/tempor2
alteracao=$(cat /tmp/tempor2 |cut -d'|' -f1)
echo Alteração:
echo $alteracao
echo Resultado final, a editar no texto:
export result=$(echo $entrada | awk -v srch="$evento_a_editar" -v repl="$alteracao" '{ sub(srch,repl,$0); print $0 }')
echo $result
echo Fim do processo

###Save changes in correct day
export day
export ENTRADA_ATUAL=$(egrep "^$day " $calendar_file)
while read -r line; do
linha_nova=$(tr -d '\n' < /tmp/listar_eventos_do_dia_editados)
printf "%s\n" "${line/"${ENTRADA_ATUAL}"/"${result}"}"
done < $calendar_file > ~/file.new
egrep "^$day " ~/file.new 
cp ~/file.new  $calendar_file
#Replace "@ @" with "@"
sed -i -e 's/\@ \@/\@/g'  $calendar_file  ###############################be carefull with sed
#Replace "@ " with "@"
sed -i -e 's/\@ /\@/g'  $calendar_file  ###############################be carefull with sed
#Remove any "@" left at the end of any line
sed 's/\@$//' $calendar_file              ###############################be carefull with sed
#Remove any "@ " left at the end of any line
sed 's/\@ $//' $calendar_file              ###############################be carefull with sed
egrep "^$day "  $calendar_file 

#####Ugly way to to reorder day's entries:
#Generate list of current day's events (withouy all day events), in file /tmp/listar_eventos_do_dia
eventos_existentes=$(grep ^$day $calendar_file |cut -d' ' -f1 --complement)
echo $eventos_existentes
x=$(tr -dc '@' <<<"$eventos_existentes" | awk '{ print length; }')
echo O Numero de Eventos no dia em causa é $x
let "x=x+2"
#Count envents (each @ sign)
numero_de_eventos_no_dia=$(tr -dc '@' <<<"$eventos_existentes" | awk '{ print length; }')
echo "" > /tmp/listar_eventos_do_dia
i=2
#loop to add events to temporary file
until [ $i -ge $x ]
do
grep $day $calendar_file |cut -d@ -f$i >> /tmp/listar_eventos_do_dia
  ((i=i+1))
done
#Remove empty lines
sed -i '/^$/d' /tmp/listar_eventos_do_dia

####Put events in correct order
date_and_all_day_events=$(egrep "^$day " $calendar_file |cut -d'@' -f1)
sort /tmp/listar_eventos_do_dia > /tmp/temp0.txt
tac /tmp/temp0.txt > /tmp/temp1.txt
echo $date_and_all_day_events >> /tmp/temp1.txt
tac /tmp/temp1.txt > /tmp/listar_eventos_do_dia_editados
sed -i '/^$/d' /tmp/listar_eventos_do_dia_editados

###Create line from /tmp/listar_eventos_do_dia_editados
#Start by adding " @" at the begining of each line
sed -i -e 's/^/ @/' /tmp/listar_eventos_do_dia_editados
#Remove " @" from first line (date and eventual all day events)- it's the 2 first characters, so, repeat sed command 
sed -i '1s/^.//' /tmp/listar_eventos_do_dia_editados
sed -i '1s/^.//' /tmp/listar_eventos_do_dia_editados
#Generate line from temporary file
export linha_nova=$(tr -d '\n' < /tmp/listar_eventos_do_dia_editados)
echo "Current day's entry will be:"
echo $linha_nova

###Save changes in correct day
export day
export ENTRADA_ATUAL=$(egrep "^$day " $calendar_file)
while read -r line; do
linha_nova=$(tr -d '\n' < /tmp/listar_eventos_do_dia_editados)
printf "%s\n" "${line/"${ENTRADA_ATUAL}"/"${linha_nova}"}"
done < $calendar_file > ~/file.new
#Replace "@@" with a simple "@"
sed -i -e 's/\@\@/\@/g'  ~/file.new
cat ~/file.new
## exit ##### STOP test HERE, dont edit real file ###############
cp ~/file.new $calendar_file
echo Generated entry for $day is
egrep "^$day "  $calendar_file 
exit
##END

}

search_event(){
 ###future entry to search for events:
  event_to_search=$( yad --window-icon=$window_icon --title="antiX Calendar" --center --entry --entry-label="" --button=" !/usr/share/icons/papirus-antix/22x22/actions/search.png")
  rm /tmp/agenda_search_results.txt
   grep -i $event_to_search $HOME/yad-calendar.txt > /tmp/agenda_search_results-desorganized.txt
   grep -i $event_to_search $HOME/yad-calendar.txt > /tmp/agenda_search_results-desorganized.txt
   sort -t- -k3.1,3.4 -k2,2 /tmp/agenda_search_results-desorganized.txt > /tmp/agenda_search_results.txt
#Display results
yad --window-icon=$window_icon --title="antiX Calendar" --no-buttons  --width=550 --height=550 --center --separator=" " --list  --column=""  < /tmp/agenda_search_results.txt
    pkill yad
    exit 1
  
  
}

export -f Adicionar_evento Editar_evento  search_event buzzer alarm
touch $calendar_file && [ -s $calendar_file ] || echo "28/06/2020 This is how yad-calendar entries work! Add ONLY ONE line per day, starting with the date. If nothing shows up in the calendar, try another date format like dd-mm-yyyy" > $calendar_file

#Process cli arguments. If user ran the script with the "--alarm" argument, activate alarm for calendar entries
choise1="--alarm"
 if [ $1 == $choise1 ]; then
	 clear
     alarm
     exit
 fi 

#Main Calendar window
day=$(yad --window-icon=$window_icon --title="antiX Calendar" --calendar --undecorated --mouse  --details=$calendar_file --button=" !/usr/share/icons/papirus-antix/22x22/actions/search.png":"bash -c search_event" --button="X":1)
 if [[ $foo -eq 1 ]]; then
    pkill yad
    exit 1
  fi

if [[ $foo -eq 2 ]]; then
    exit 
  fi  

#Exit if no day was selected
[ -z "$day" ] && exit

#If a day was selected, check if it has any events (a line starting with a date) and take the apropriate action
if grep -q $day $calendar_file; then
   Editar_evento
   else
   Adicionar_evento
fi

January 17, 2021 at 3:39 pm #50031

Moderator

Brian Masinick

Helpful

Thanks again for sharing your work.

Whether an official application, tool, or simply “free” software that people share, this kind of work is precisely the thing that keeps the overall free software movement alive and well. I am one who appreciates this very much!

--
Brian Masinick

January 17, 2021 at 4:03 pm #50032

Member

PPC

Helpful

Thanks, Mr Masinick
I was surprised by the ammount of work such a simple application implies…
I almost did not write it- but, as I was developing it, I was tempted to create even more GUI’s, to more actions
Well, why create one more calendar application? Even such a low on features one?
Simple- I found no calendar (except for calcurse, the default antiX calendar app, that many people don’t even know it’s there) that ran on extremely low system resources and/or without the need to install dependencies.
The script it self contained- if you have yad in your system you need nothing more- so no dependencies.
There are some very good calendar apps: Thunderbird’s calendar plugin is great, and even works with google calendar, but, it takes a huge amount of RAM to run. Osmo and Day-planner are great but they take too much RAM to run permanently on a low specs machine…
This script is not meant to be a full fledged calendar as those other apps- it’s meant to be an electronic version of a pen and paper pocket agenda- write stuff you need to do there, and check it any time you need to… but with some benefits – you can set alarms and you can search for events instantly.
With some (a lot more) work there can be even more features added to it: time validation across all time input fields (that keeps bugging me) and repeated events (like birthdays/holidays), a snooze function on the alarm, and the possibility to set the alarm before the event – it all can be added, making this a much more complete PIM.
In a time most of the civilized world carries small pocked computers, investing a lot of time creating a script that does work as well as a phone calendar seem a bit pointless- but it’s faster to set an alarm to leave work in the computer I’m already using than doing it on my android device… And it works from a simple text file, stored in my own computer, not accessible to some giant corporation!

This reply was modified 2 years, 3 months ago by PPC.

January 17, 2021 at 6:27 pm #50035

Moderator

Brian Masinick

Helpful

@PPC: What you just explained is precisely why the free software movement has had, and continues to have, considerable value, especially to those of us who either cannot afford, or choose not to spend our resources on the “latest and greatest” electronic creations, regardless of how “enticing” the marketing promotions may be.

Your efforts are a prime example of what can still be done to produce simple, yet functional, fast, and often good looking software.

I hope that you are able to maintain your enthusiasm for the kind of contributions you make. Remember, whether they make it into some distribution or not, people like you and others who are “like minded” will always value and appreciate simple, useful apps, tools, and ideas.

--
Brian Masinick

January 17, 2021 at 10:57 pm #50043

Moderator

BobC

Helpful

Maybe its something odd about my system, but it looks like the alarm isn’t working due to it not getting the right date. My date is in whatever format it would default to (US keyboard,and time zone). I am trying to figure it out…

January 18, 2021 at 12:57 am #50047

Moderator

BobC

Helpful

Yes, I think the program is expecting the date to be DD/MM/YYYY but mine go into the file in MM/DD/YYYY because that is what Yad returns from the main calendar.

I would say it would be best to get the format being displayed and use that, because that’s the way it is saving the date in the file. That way they will match.

January 18, 2021 at 6:59 am #50061

Moderator

BobC

Helpful

PPC, That’s really a nice script and I could not have written it from scratch. Too many things I don’t know. Anyway since its pretty tricky, I’d suggest comparing to see what I changed, since you are the Yad pro.
Ok:
I centered the window (it was under the taskbar with automatic autohide)
I made the enter event window wider
I fixed the problem with date locales by using the local format and tried to fix the line #1 note, basically the date should be the same as their normal format mm/dd/yyyy or dd/mm/yyyy
I fixed the extra space after the @ (i think i fixed it correctly)
I widened the alarm window and included the word alarm in the title
I fixed it so you can add alarms on the same day before the current one by looking for ones within next 30 seconds, else sleeping for 30 seconds before looking again
I fixed the grep stuff to look for the date at the beginning of the line

todo:
in alarm window only the first word of the event description appears. i think this is due to how it cuts it out
better or configurable alarm noise. Idea: add 2nd parameter with sound file to play, and if no sound file given (or not found) and parameter #1 is –alarm, then give silent popup alarm

Getting very late here. I left my debug on.

#!/bin/bash
set -x
#Simple Calendar for antiX - dependencies: Yad. By PPC, GPL license, 15/01/2021. Please keep this line about Creator and license
export calendar_file="$HOME/yad-calendar.txt"
window_icon=/usr/share/icons/papirus-antix/22x22/apps/calendar.png

##Clean up calendar file (NOTE: because @ is a special character, in order for the sed comand to percieve it as an ordinary character, it has to be preceded by \, like so: "\@"):
#Remove all empty lines
sed -i '/^$/d' $calendar_file
#Remove all empty lines
sed -i '/^$/d' $calendar_file
#Remove lines with only date and nothing more (orphan lines)- it removes all lines with less than 10 characters
sed -i -r '/^.{,10}$/d' $calendar_file
#Replace "@ " with "@"
sed -i -e 's/\@ /\@/g'  $calendar_file
#Replace "@@" with a simple "@"
sed -i -e 's/\@\@/\@/g'  $calendar_file
#Replace "@ @" with "@"
sed -i -e 's/\@ \@/\@/g'  $calendar_file
#Remove any "@" left at the end of any line
sed 's/\@$//' $calendar_file
#Remove any "@ " left at the end of any line
sed 's/\@ $//' $calendar_file

buzzer()
{
	echo "$(date) #############################################################################"
	###clear
	echo "$(date) Sounding buzzer"
	echo "$(date) Sounding buzzer" >> $logfile
speaker-test --frequency 200 --test sine & sleep 2 && pkill speaker-test	
}

alarm ()
{
killall sleep
export -f buzzer
localfmt="+$(locale -k LC_TIME | grep ^d_fmt | cut -d= -f2)"
today=$(date $localfmt)
today2=^
today7=$today2${today:1:10}
echo "$(date) localfmt: $localfmt  today: $today  today7: $today7"
today=$today7
#read alarm and event from file $HOME/yad-calendar.txt (in format "dd/mm/YYY hh:mm event")
todays_events=$(grep -G "$today" $HOME/yad-calendar.txt |cut -d' ' -f1 --complement)
x=$(tr -dc '@' <<<"$todays_events" | awk '{ print length; }')
echo "$(date) $x Events: $todays_events"
echo "$(date) $x Events: $todays_events" >> $logfile
# echo The number of events for today is $x
let "x=x+2"
i=2
until [ $i -ge $x ]
do
 grep -G $today $HOME/yad-calendar.txt |cut -d@ -f$i |cut -d" " -f1
 target_time=$(grep $today $HOME/yad-calendar.txt |cut -d@ -f$i |cut -d" " -f1 |cut -d"-" -f1)
 event_description=$(grep $today $HOME/yad-calendar.txt |cut -d@ -f$i |cut -d" " -f2)
 initial_time=$(date +"%H":"%M":"%S")
 diference=$(echo "$target_time
 $initial_time" | 
  (read later_time; read former_time;
    former_seconds=$(date --date="$former_time" +%s);
    later_seconds=$(date --date="$later_time" +%s);
    echo $((later_seconds-former_seconds)) ))
 echo $diference
	echo "$(date) target_time: $target_time   initial_time: $initial_time  diference: $diference  event_description: $event_description"
      if [ $diference -gt 0 ] && [ $diference -lt 31 ]	;	then
  		echo "$(date) #############################################################################"
  		###clear
  		echo "$(date) There are new alarms for today"
  		echo Next Alarm will sound in $diference seconds
  		nohup sleep $diference 
  	    buzzer & 
  	    notify-send "$target_time $event_description ..." &
  	    yad --center --width=400 --no-buttons --window-icon="/usr/share/icons/papirus-antix/22x22/apps/calendar.png" --title="antiX Calendar Alarm" --text="\n$target_time\n  $event_description\n" --text-align=center 
     fi
     ((i=i+1))
done
# The number below is how many seconds the script should wait before checking for future alarm times (default=30)
echo "$(date) Time to sleep for 30 seconds then $BASH_SOURCE --alarm"
sleep 30 && $BASH_SOURCE --alarm &
}

Check_time ()
{
#Validate time format
time=$inicio
number_of_digits_in_time=$(echo -n "time" | wc -c)
time_check="good"
#Only procede if there's a initial time entered- to allow adding directly "all day events"
#check is "time" value exists, store result in "time_inputed"
[[ ! -z "$inicio" ]] && time_inputed=1 ||  time_inputed=0
if [ $time_inputed -eq 1 ];then
echo "USer entered start time, it's not an all day event, check if time is valid"
hour=$(echo $time |cut -d':' -f1)
number_of_digits_in_hour=$(echo -n "$hour" | wc -c)
##echo $number_of_digits_in_hour
if [ "$number_of_digits_in_hour" -lt 2 ] ; then
hour=$(echo 0$hour)
fi
if [ "$hour" -lt 24 ] ; then
 echo "Valid time pattern"
 #hour is ok, checking minutes
 minute=$(echo $time |cut -d':' -f2)
 number_of_digits_in_minute=$(echo -n "$minute" | wc -c)
## echo $number_of_digits_in_minute
 if [ "$number_of_digits_in_minute" -lt 2 ] ; then
   hour=$(echo 0$minute)
 fi
 if [ "$minute" -lt 60 ] ; then
	echo "Valid time pattern"
	else
##	 echo "InValid time pattern"
export	time_check="bad"
 fi
 else
##	echo "InValid time pattern"
export	time_check="bad"
fi
fi
}

Adicionar_evento ()
{
# Empty day, add an event
entrada=$(yad --window-icon=$window_icon --title="$day" --center --width=400 --form --field="Event:" --field="Start (optional):" --field="End (optional):" "$evento" "$inicio" "")
echo Selected: $evento_a_editar
export inicio=$(echo $entrada |cut -d'|' -f2)
evento=$(echo $entrada |cut -d'|' -f1)
export fim=$(echo $entrada |cut -d'|' -f3)

Check_time inicio

 if [ $time_check == "bad" ]
	then
      echo "time not ok "
      yad --center --window-icon=$window_icon --title="antiX Calendar" --text=" Incorrect time entered \n Enter a time between 00:00 and 23:59 " --button="X":1 --button="OK":2
		foo=$?
		if [[ $foo -eq 1 ]]; then
			exit
		fi
		if [[ $foo -eq 2 ]]; then
			 inicio=$(echo $inicio |cut -d' ' -f2)
			 fim=$(echo $inicio |cut -d' ' -f3)
			 Adicionar_evento
		fi          
 fi
#add "@" before the start time
[[ ! -z "$inicio" ]] && inicio=$(echo \@ $inicio)
#Add indication of end of event only if "end" was inputed
[[ ! -z "$fim" ]] && inicio=$(echo $inicio-$fim)
#Save entered data to file
echo $day $inicio $evento >> $HOME/yad-calendar.txt
exit
}

Editar_evento(){
# Day with existing event(s)
#Create array of the day's event(s)
entrada=$(grep -h $day $calendar_file)
reminder_time=$(echo $entrada|cut -d' ' -f2)
reminder_date=$(echo $entrada|cut -d' ' -f1)
line=($(grep -n $day $calendar_file | head -n 1 | cut -d: -f1))
eventos_existentes=$(grep $day $calendar_file |cut -d' ' -f1 --complement)
#Count existing timed events (indicated by "@", so, count "@" signs
x=$(tr -dc '@' <<<"$eventos_existentes" | awk '{ print length; }')
echo The number of events for the day is $x
let "x=x+2"
numero_de_eventos_no_dia=$(tr -dc '@' <<<"$eventos_existentes" | awk '{ print length; }')
#clean temporary file
echo "" > /tmp/listar_eventos_do_dia
##loop to check for each timed event, add each event to a different line of the temp file
i=1
until [ $i -ge $x ]
do
grep $day $calendar_file |cut -d@ -f$i >> /tmp/listar_eventos_do_dia
  ((i=i+1))
done
#remove empty lines
sed -i '/^$/d' /tmp/listar_eventos_do_dia
#list that day's event(s) in a yad window:
evento_a_editar=$(yad --window-icon=$window_icon --title="$day"  --button="+":2 --width=550 --height=550 --center --separator=" " --list  --column="Double click an event to edit or cancel it, double click date to add an all day event"  < /tmp/listar_eventos_do_dia)
foo=$?
echo Selected: $evento_a_editar

#START GUI to add (timed) event:
if [[ $foo -eq 2 ]]; then

#process result of user entry:
date=$day
input=$(yad --window-icon=$window_icon --title="$day" --center --form --field="Event" --field=Start --field="End (optional)")
export start=$(echo $input |cut -d'|' -f2)
event=$(echo $input |cut -d'|' -f1)
export end=$(echo $input |cut -d'|' -f3)

##### TO DO - time validation not working here!!!!!!!!!!!!!!!1
echo $start
Check_time $start
 if [ $time_check == "bad" ]
	then
      echo "time not ok "
      yad --center --window-icon=$window_icon --title="antiX Calendar" --text=" Incorrect time entered \n Enter a time between 00:00 and 23:59 " --button="X":1 --button="OK":2
		foo=$?
		if [[ $foo -eq 1 ]]; then
			exit
		fi
		if [[ $foo -eq 2 ]]; then
			 Editar_evento
		fi          
 fi

edited_day=$(echo $current_day @$start $event)

#Generate list of current day's events (withouy all day events), in file /tmp/listar_eventos_do_dia
eventos_existentes=$(grep ^$day $calendar_file |cut -d' ' -f1 --complement)
echo $eventos_existentes
x=$(tr -dc '@' <<<"$eventos_existentes" | awk '{ print length; }')
echo O Numero de Eventos no dia em causa é $x
let "x=x+2"
#Count envents (each @ sign)
numero_de_eventos_no_dia=$(tr -dc '@' <<<"$eventos_existentes" | awk '{ print length; }')
echo "" > /tmp/listar_eventos_do_dia
i=2
#loop to add events to temporary file
until [ $i -ge $x ]
do
grep $day $calendar_file |cut -d@ -f$i >> /tmp/listar_eventos_do_dia
  ((i=i+1))
done
#Remove empty lines
sed -i '/^$/d' /tmp/listar_eventos_do_dia

#add new entry to the end of the file
input=$edited_day   ##############################simulate user input
echo $input >> /tmp/listar_eventos_do_dia

cat /tmp/listar_eventos_do_dia

####Put events in correct order
date_and_all_day_events=$(egrep "^$day " $calendar_file |cut -d'@' -f1)
sort /tmp/listar_eventos_do_dia > /tmp/temp0.txt
tac /tmp/temp0.txt > /tmp/temp1.txt
echo $date_and_all_day_events >> /tmp/temp1.txt
tac /tmp/temp1.txt > /tmp/listar_eventos_do_dia_editados
sed -i '/^$/d' /tmp/listar_eventos_do_dia_editados
# New event's list, starting with date (and eventual all day's events) followed by timed events, in /tmp/listar_eventos_do_dia_editados

###Create line from /tmp/listar_eventos_do_dia_editados
#Start by adding " @" at the begining of each line
sed -i -e 's/^/ @/' /tmp/listar_eventos_do_dia_editados
#Remove " @" from first line (date and eventual all day events)- it's the 2 first characters, so, repeat sed command 
sed -i '1s/^.//' /tmp/listar_eventos_do_dia_editados
sed -i '1s/^.//' /tmp/listar_eventos_do_dia_editados
#Generate line from temporary file
export linha_nova=$(tr -d '\n' < /tmp/listar_eventos_do_dia_editados)
echo "Current day's entry will be:"
echo $linha_nova

###Save changes in correct day
export day
export ENTRADA_ATUAL=$(egrep "^$day " $calendar_file)
while read -r line; do
linha_nova=$(tr -d '\n' < /tmp/listar_eventos_do_dia_editados)
printf "%s\n" "${line/"${ENTRADA_ATUAL}"/"${linha_nova}"}"
done < $calendar_file > ~/file.new
#Replace "@@" with a simple "@"
sed -i -e 's/\@\@/\@/g'  ~/file.new
cat ~/file.new
## exit ##### STOP test HERE, dont edit real file ###############
cp ~/file.new $calendar_file
echo Generated entry for $day is
egrep "^$day "  $calendar_file 
exit
fi
##END

##END of GUI to add (timed) event

### Process click in event from list:
entrada=$(grep -h $day $calendar_file)
echo Entrada completa a ser editada:
echo $entrada
echo Evento a editar:
echo $evento_a_editar

if [ -z "${evento_a_editar}" ]; then
    echo "No event selected for edition, exiting"
    exit
fi

input=$evento_a_editar
echo $input > /tmp/tempor1
evento_a_editar=$(cat /tmp/tempor1 |cut -d'|' -f1)
input2=$(yad --window-icon=$window_icon --center --title="$day" --form --field="" "$evento_a_editar")
echo $input2 > /tmp/tempor2
alteracao=$(cat /tmp/tempor2 |cut -d'|' -f1)
echo Alteração:
echo $alteracao
echo Resultado final, a editar no texto:
export result=$(echo $entrada | awk -v srch="$evento_a_editar" -v repl="$alteracao" '{ sub(srch,repl,$0); print $0 }')
echo $result
echo Fim do processo

###Save changes in correct day
export day
export ENTRADA_ATUAL=$(egrep "^$day " $calendar_file)
while read -r line; do
linha_nova=$(tr -d '\n' < /tmp/listar_eventos_do_dia_editados)
printf "%s\n" "${line/"${ENTRADA_ATUAL}"/"${result}"}"
done < $calendar_file > ~/file.new
egrep "^$day " ~/file.new 
cp ~/file.new  $calendar_file
#Replace "@ " with "@"
sed -i -e 's/\@ /\@/g'  $calendar_file
#Replace "@@" with a simple "@"
sed -i -e 's/\@\@/\@/g'  $calendar_file
#Replace "@ @" with "@"
sed -i -e 's/\@ \@/\@/g'  $calendar_file  ###############################be carefull with sed
#Replace "@ " with "@"
sed -i -e 's/\@ /\@/g'  $calendar_file  ###############################be carefull with sed
#Remove any "@" left at the end of any line
sed 's/\@$//' $calendar_file              ###############################be carefull with sed
#Remove any "@ " left at the end of any line
sed 's/\@ $//' $calendar_file              ###############################be carefull with sed
egrep "^$day "  $calendar_file 

#####Ugly way to to reorder day's entries:
#Generate list of current day's events (withouy all day events), in file /tmp/listar_eventos_do_dia
eventos_existentes=$(grep ^$day $calendar_file |cut -d' ' -f1 --complement)
echo $eventos_existentes
x=$(tr -dc '@' <<<"$eventos_existentes" | awk '{ print length; }')
echo O Numero de Eventos no dia em causa é $x
let "x=x+2"
#Count envents (each @ sign)
numero_de_eventos_no_dia=$(tr -dc '@' <<<"$eventos_existentes" | awk '{ print length; }')
echo "" > /tmp/listar_eventos_do_dia
i=2
#loop to add events to temporary file
until [ $i -ge $x ]
do
grep $day $calendar_file |cut -d@ -f$i >> /tmp/listar_eventos_do_dia
  ((i=i+1))
done
#Remove empty lines
sed -i '/^$/d' /tmp/listar_eventos_do_dia

####Put events in correct order
date_and_all_day_events=$(egrep "^$day " $calendar_file |cut -d'@' -f1)
sort /tmp/listar_eventos_do_dia > /tmp/temp0.txt
tac /tmp/temp0.txt > /tmp/temp1.txt
echo $date_and_all_day_events >> /tmp/temp1.txt
tac /tmp/temp1.txt > /tmp/listar_eventos_do_dia_editados
sed -i '/^$/d' /tmp/listar_eventos_do_dia_editados

###Create line from /tmp/listar_eventos_do_dia_editados
#Start by adding " @" at the begining of each line
sed -i -e 's/^/ @/' /tmp/listar_eventos_do_dia_editados
#Remove " @" from first line (date and eventual all day events)- it's the 2 first characters, so, repeat sed command 
sed -i '1s/^.//' /tmp/listar_eventos_do_dia_editados
sed -i '1s/^.//' /tmp/listar_eventos_do_dia_editados
#Generate line from temporary file
export linha_nova=$(tr -d '\n' < /tmp/listar_eventos_do_dia_editados)
echo "Current day's entry will be:"
echo $linha_nova

###Save changes in correct day
export day
export ENTRADA_ATUAL=$(egrep "^$day " $calendar_file)
while read -r line; do
linha_nova=$(tr -d '\n' < /tmp/listar_eventos_do_dia_editados)
printf "%s\n" "${line/"${ENTRADA_ATUAL}"/"${linha_nova}"}"
done < $calendar_file > ~/file.new
#Replace "@@" with a simple "@"
sed -i -e 's/\@\@/\@/g'  ~/file.new
cat ~/file.new
## exit ##### STOP test HERE, dont edit real file ###############
cp ~/file.new $calendar_file
echo Generated entry for $day is
egrep "^$day "  $calendar_file 
exit
##END

}

search_event(){
 ###future entry to search for events:
  event_to_search=$( yad --window-icon=$window_icon --title="antiX Calendar" --center --entry --entry-label="" --button=" !/usr/share/icons/papirus-antix/22x22/actions/search.png")
  rm /tmp/agenda_search_results.txt
   grep -i $event_to_search $HOME/yad-calendar.txt > /tmp/agenda_search_results-desorganized.txt
   grep -i $event_to_search $HOME/yad-calendar.txt > /tmp/agenda_search_results-desorganized.txt
   sort -t- -k3.1,3.4 -k2,2 /tmp/agenda_search_results-desorganized.txt > /tmp/agenda_search_results.txt
#Display results
yad --window-icon=$window_icon --title="antiX Calendar" --no-buttons  --width=550 --height=550 --center --separator=" " --list  --column=""  < /tmp/agenda_search_results.txt
    pkill yad
    exit 1
  
  
}

export -f Adicionar_evento Editar_evento  search_event buzzer alarm
touch $calendar_file && [ -s $calendar_file ] || echo "28/06/2020 This is how yad-calendar entries work! Add ONLY ONE line per day, starting with the date. If nothing shows up in the calendar, try another date format like mm/dd/yyyy" > $calendar_file

#Process cli arguments. If user ran the script with the "--alarm" argument, activate alarm for calendar entries
choise1="--alarm"
 if [ $1 == $choise1 ]; then
	 ###clear
     alarm
     exit
 fi 

#Main Calendar window
day=$(yad --window-icon=$window_icon --title="antiX Calendar" --center --calendar --undecorated --mouse  --details=$calendar_file --button=" !/usr/share/icons/papirus-antix/22x22/actions/search.png":"bash -c search_event" --button="X":1)
 if [[ $foo -eq 1 ]]; then
    pkill yad
    exit 1
  fi

if [[ $foo -eq 2 ]]; then
    exit 
  fi  

#Exit if no day was selected
[ -z "$day" ] && exit

#If a day was selected, check if it has any events (a line starting with a date) and take the apropriate action
if grep -q $day $calendar_file; then
   Editar_evento
   else
   Adicionar_evento
fi

This reply was modified 2 years, 3 months ago by BobC. Reason: bad paste originally
This reply was modified 2 years, 3 months ago by BobC.

January 18, 2021 at 9:11 am #50071

Member

PPC

Helpful

@BobC – Thanks for making the Alarm work in all date formats! I had forgotten about that problem, since I made it work for my (very sane) format dd/mm/yyy 🙂
I wonder if there’s a less complex way to do that?
You are right about the event’s description only showing the first word in the alarm pop up window- it was by design- it show’s the time and the first word, then “…” – for privacy reasons.
If you want to display the full event, replace, in the Alarm function, the “event_description” line with this:

event_description=$(grep $today $HOME/yad-calendar.txt |cut -d@ -f$i)

That should fix it…

I worked hard in finding a way to have an audio alarm without needing to play an audio file- because, on my work computer I do not have any audio files- this ensured that everyone would get to have audible calendar alarms. I had thought about adding the option for silent alarms (simply disabling the “buzzer” function if the arguments “–alarm –silent” where used), but I can see the value in having also “–alarm –file:~/Highway_to_hell.mp3” has an alarm sound 🙂
I’ll probably be busy today, but I’ll try to take a look at that tomorrow.

EDIT:

If you had notifications working in you system, you’ll notice that you get 2 visual: the yad window and a notification.
I went for both, for testing purposes only – visually I prefer the system notification, but the yad window has the advantage of not automatically turning off. So, if you were away from your computer when the alarm sounded, you’ll notice it as soon as you get back.
With a bit of work the yad window can be configured to look like a system notification: poping up on the upper right corner of the screen, without decorations, and with a button saying “Dismiss” (and, eventually, one saying “Snooze for 5 minutes”)

It was handy, however, adding a notification to my startup file, saying “Calendar Alarms are on”, after adding the alarm script to it, so I get reminded that, in fact that feature is on, because I have a very bad memory.

This reply was modified 2 years, 3 months ago by PPC.
This reply was modified 2 years, 3 months ago by PPC.

January 18, 2021 at 1:46 pm #50077

Moderator

BobC

Helpful

If I had been deciding the format it would have been YYYYMMDD@HH:MM Meet Tom at Cafe@HH:MM Watch TV show so the lines would easily sort, but once files exist the format isn’t easy to change, and you already figured out how to sort them, so it’s not an issue.

I have a little generic alarm.wav file I created to warn me when there are severe problems, like almost out of disk space or battery almost dead. I could create another, less severe one called reminder.wav to use for reminder alarms.

No, I don’t have notifications. I saw that code and was wondering what that was. Is is a program I don’t have that I should have? I would think that I would want those used if it was on, and if not, then use the Yad pop up, but not both.

I would say if using alarms, I would only type in things I wanted to see popping up.

Anyway, congrats on a great innovation… it’s totally useful and very light.

PS: Thinking better now awake, the best format would be one that could easily interface calendar/appointment entries with my Android phone app and MS outlook from work.

This reply was modified 2 years, 3 months ago by BobC.

January 18, 2021 at 2:47 pm #50080

Member

PPC

Helpful

BobC wrote:

the best format would be one that could easily interface calendar/appointment entries with my Android phone app and MS outlook from work.

You are so very right… I thought about that that, but found no [easy] way to implement exporting “yad –calendar” files to any other format. So, for now, unfortunately “antiX Calendar” uses non exportable (and non importable) files 🙁
I thought about exporting files to calcurse’s format – a format that I understand and could use [with some effort], and use calcurse to export/import ical files… But, at least in my tests, for some reason, calcurse created .ical files are always empty – I’m not sure if I’m doing something wrong or if calcurse’s antiX version is broken in that function, for some reason.
Making calcurse’s export function work would probably allow to sync the calendar with google calendar, etc (since calcurse’s documentation says webcal are supported, if I recall correctly).
In practice, if a user wants to use Google Calendar (since most of the world has android devices), I guess that it’s best for them to use Google calendar directly (on the phone – since those devices are always next to them). That said, I do use my phone’s calendar all the time 🙂
If you, or any other user know how to implement importing/expoting calendar files to other formats, please, do share!

EDIT: thanks to this site- http://icalgen.yc.sg/ I generated a calendar file, opened it’s text file and now know how to right a script to import/export ical’s .ics files to/from yad-calendar files… But I’m too tired to write the script myself.
Any way, here’s an example of an ical file I generated:

BEGIN:VCALENDAR
VERSION:2.0
BEGIN:VEVENT
CLASS:PUBLIC
DESCRIPTION:teste1\nDate and Time - Jan 18\, 2021 4:00 PM to 6:00 PM\nVenue - \ntesting generating ical files\n
DTSTART:20210118T120000Z
DTEND:20210118T121000Z
LOCATION: 
SUMMARY;LANGUAGE=en-us:teste
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
DESCRIPTION:teste2\nDate and Time - Jan 18\, 2021 4:00 PM to 6:00 PM\nVenue - \ntesting generating ical files\n
DTSTART:20210119T120000Z
DTEND:20210119T121000Z
LOCATION: 
SUMMARY;LANGUAGE=en-us:teste
END:VEVENT
END:VCALENDAR

The relevant parts are the lines “DESCRIPTION”, “DTSTART” and “DTEND”
for events withtout end (I don’t use end time for events myself, but it can be handy when using calendar for meeting), simply reapeat clone line “DTSTART” to “DTEND”

That information can be obtained from yad-calendar files, using a loop to process from the first line to the last, and, inside that loop, use a variation of the same loop we already use in the alarm, to process each day’s events separately, generating the lines “DESCRIPTION”, “DTSTART” and “DTEND” from all events to export yad-calendar files to ics.
The opposite process can be used to import ics files to yad-calendar…
Any takers on writing such script?… Bob 🙂

This reply was modified 2 years, 3 months ago by PPC.

January 21, 2021 at 6:13 am #50271

Moderator

BobC

Helpful

I looked at the .ics format, too. It reminds me of a 6 ton government designed mouse, LOL. .vcs was similar it looked.

I suppose there could be an “Import/Export Options” button and a script it would run…

Too tired from working at the moment.

I have these dreams of adding “Disk space monitors” and “Updates available” features to IceWM but don’t know C++ and it’s tough code, and the Devs don’t want to do it even after I offered to donate for beer (or whatever) for them. They don’t seem to realize that IceWM is becoming more popular because it is actually capable of running WELL on these low memory, low horsepower machines that many folks are stuck with, and we could buy them back more memory and CPU (to make it available for the greedy browsers) if we could get IceWM handling more of those totally common functions at a lower level than the alternative addon programs. One of these days I will figure it out, I hope.

January 21, 2021 at 7:20 am #50273

Anonymous

Helpful

tried to submit a “food for thought” post, spamfilter ate it.
SIX is too many embedded links???

so I sent a copy to pastebin: https://pastebin.com/raw/rtdgVeUT

January 21, 2021 at 3:19 pm #50357

Moderator

Brian Masinick

Helpful

From skidoo:
>>> way to implement exporting “yad –calendar” files to any other format

food for thought:
bash script, 800 lines
https://github.com/pmarin/ical2pcal
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ical2pcal v0.0.7 – Convert iCalendar (.ics) data files to pcal data files

Usage: ical2pcal [-E] [-o <file>] [-h] file

-E Use European date format (dd/mm/yyyy)

-o <file> Write the output to file instead of to stdout

-h Display this help

The iCalendar format (.ics file extension) is a standard (RFC 2445)
for calendar data exchange. Programs that support the iCalendar format
are: Google Calendar, Apple iCal, Evolution, Orange, etc.

The iCalendar format have many objects like events, to-do lists,
alarms, journal entries etc. ical2pcal only use the events
in the file showing in the pcal file the summary and the time of
the event, the rest information of the event like
description or location are commented in the pcal file (because
usually this information does not fit in the day box).

Currently automatic detection and conversion to local time of time values
in UTC is implemented. All other time values are assumed as local times.

ical2pcal does not support complex repeating events, like every first sunday in month.
Only simple recurrence are allowed like:
every n-th [day|week|month|year] from <DATE> [until <DATE> | count] except <DATE>,…
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also

https://uriesk.wordpress.com/2014/03/13/edit-ics-calendarfiles-with-bash-scripts-and-sed/

https://help.nextcloud.com/t/calcardbackup-bash-script-to-backup-nextcloud-calendars-and-addressbooks-as-ics-vcf-files/11978
^—v
https://stackoverflow.com/questions/44225743/owncloud-calendar-ics-backup

https://wiki.davical.org/index.php/How_can_I_migrate_to_DAViCal_using_already_generated_.ics_files%3F

https://askubuntu.com/questions/827919/bash-script-to-edit-ics-files

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Brian Masinick

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