From e561deb5e5d6e138f8a11d8dba21a712652415ac Mon Sep 17 00:00:00 2001
From: Winzlieb <winzlieb@c3d2.de>
Date: Sun, 31 Jul 2022 03:48:24 +0200
Subject: [PATCH] add script to generate recurring events (Plenum,...)

---
 scripts/make-recurring-events.sh | 156 +++++++++++++++++++++++++++++++
 1 file changed, 156 insertions(+)
 create mode 100755 scripts/make-recurring-events.sh

diff --git a/scripts/make-recurring-events.sh b/scripts/make-recurring-events.sh
new file mode 100755
index 000000000..03c7da82e
--- /dev/null
+++ b/scripts/make-recurring-events.sh
@@ -0,0 +1,156 @@
+#!/usr/bin/env bash
+# ARG_OPTIONAL_SINGLE([start],[s],[start time HH:mm])
+# ARG_OPTIONAL_SINGLE([end],[e],[end time HH:mm])\
+# ARG_OPTIONAL_SINGLE([rrule],[r],[rrule can be done via https://jakubroztocil.github.io/rrule/])
+# ARG_OPTIONAL_SINGLE([loop],[l],[how many dates should be generated])
+# ARG_HELP([Generate events based on rrule strings])
+# ARGBASH_GO()
+# needed because of Argbash --> m4_ignore([
+### START OF CODE GENERATED BY Argbash v2.9.0 one line above ###
+# Argbash is a bash code generator used to get arguments parsing right.
+# Argbash is FREE SOFTWARE, see https://argbash.io for more info
+# Generated online by https://argbash.io/generate
+
+
+die()
+{
+	local _ret="${2:-1}"
+	test "${_PRINT_HELP:-no}" = yes && print_help >&2
+	echo "$1" >&2
+	exit "${_ret}"
+}
+
+
+begins_with_short_option()
+{
+	local first_option all_short_options='serlh'
+	first_option="${1:0:1}"
+	test "$all_short_options" = "${all_short_options/$first_option/}" && return 1 || return 0
+}
+
+# THE DEFAULTS INITIALIZATION - OPTIONALS
+_arg_start=
+_arg_end=
+_arg_rrule=
+_arg_loop=
+
+
+print_help()
+{
+	printf '%s\n' "Generate events based on rrule strings"
+	printf 'Usage: %s [-s|--start <arg>] [-e|--end <arg>] [-r|--rrule <arg>] [-l|--loop <arg>] [-h|--help]\n' "$0"
+	printf '\t%s\n' "-s, --start: start time HH:mm (no default)"
+	printf '\t%s\n' "-e, --end: end time HH:mm (no default)"
+	printf '\t%s\n' "-r, --rrule: rrule can be done via https://jakubroztocil.github.io/rrule/ (no default)"
+	printf '\t%s\n' "-l, --loop: how many dates should be generated (no default)"
+	printf '\t%s\n' "-h, --help: Prints help"
+}
+
+
+parse_commandline()
+{
+	while test $# -gt 0
+	do
+		_key="$1"
+		case "$_key" in
+			-s|--start)
+				test $# -lt 2 && die "Missing value for the optional argument '$_key'." 1
+				_arg_start="$2"
+				shift
+				;;
+			--start=*)
+				_arg_start="${_key##--start=}"
+				;;
+			-s*)
+				_arg_start="${_key##-s}"
+				;;
+			-e|--end)
+				test $# -lt 2 && die "Missing value for the optional argument '$_key'." 1
+				_arg_end="$2"
+				shift
+				;;
+			--end=*)
+				_arg_end="${_key##--end=}"
+				;;
+			-e*)
+				_arg_end="${_key##-e}"
+				;;
+			-r|--rrule)
+				test $# -lt 2 && die "Missing value for the optional argument '$_key'." 1
+				_arg_rrule="$2"
+				shift
+				;;
+			--rrule=*)
+				_arg_rrule="${_key##--rrule=}"
+				;;
+			-r*)
+				_arg_rrule="${_key##-r}"
+				;;
+			-l|--loop)
+				test $# -lt 2 && die "Missing value for the optional argument '$_key'." 1
+				_arg_loop="$2"
+				shift
+				;;
+			--loop=*)
+				_arg_loop="${_key##--loop=}"
+				;;
+			-l*)
+				_arg_loop="${_key##-l}"
+				;;
+			-h|--help)
+				print_help
+				exit 0
+				;;
+			-h*)
+				print_help
+				exit 0
+				;;
+			*)
+				_PRINT_HELP=yes die "FATAL ERROR: Got an unexpected argument '$1'" 1
+				;;
+		esac
+		shift
+	done
+}
+
+parse_commandline "$@"
+
+# OTHER STUFF GENERATED BY Argbash
+
+### END OF CODE GENERATED BY Argbash (sortof) ### ])
+# [ <-- needed because of Argbash
+
+IFS="
+"
+REPEAT=${_arg_loop:-10}
+START=${_arg_start:-00:00}
+END=${_arg_end:-12:00}
+STARTDATE="$(date -I)T${START}"
+DTSTART=$(date -u --date="${STARTDATE}" +"%Y%m%dT%H%M%SZ")
+RRULE=${_arg_rrule:-FREQ=MONTHLY;BYSETPOS=1;BYDAY=TH;INTERVAL=1}
+RRULE_CMD=rrule
+
+if ! command -v ${RRULE_CMD}  &> /dev/null
+then
+	cat <<EOF
+${RRULE_CMD} could not be found
+You can install it via:
+nix-shell -p cargo -p gcc
+cargo install rrule --features="cli-tool"
+export PATH="\$PATH:${HOME}/.cargo/bin/"
+EOF
+    exit
+fi
+
+
+for d in $(rrule "DTSTART:${DTSTART}\n${RRULE}" -l ${REPEAT});do 
+	DATE=$(date -u --date="${d}" +"%Y-%m-%dT%H:%M:%SZ")
+	DATEONLY=$(date -u --date="${d}" +"%Y-%m")
+	cat <<EOF
+  <event title="Plenum">
+    <start>${DATE}</start>
+    <location><link href="http://www.c3d2.de/space.html">HQ</link>, /proc, Zentralwerk, Riesaer Straße 32, 01127 Dresden</location>
+    <link>https://codimd.c3d2.de/plenum-${DATEONLY}</link>
+  </event>
+EOF
+done