wgodw

#!/usr/bin/env bash
#cito M:755 O:0 G:0 T:/usr/local/bin/wgodw
#------------------------------------------------------------------------------
# Project Name      - ShellProjects/source/wgodw
# Started On        - Sat 17 Jun 19:12:01 BST 2023
# Last Change       - Mon 19 Jun 23:34:57 BST 2023
# Author E-Mail     - terminalforlife@yahoo.com
# Author GitHub     - https://github.com/terminalforlife
#------------------------------------------------------------------------------
# What's Going On, DistroWatch?
#
# Simple tool for getting a pretty list of the titles of the DistroWatch RSS
# feed, without faffing about with RSS viewers. This is simply to get an
# overview as to what's going on, without going all out. If you find something
# interesting, visit DuckDuckGo!
#
# NOTE: Long lines are not wrapped, so use a sensible size.
#
# Features:
#
# N/A
#
# Bugs:
#
# N/A
#
# Dependencies:
#
#   bash (>= 4.4.12)
#   wget (>= 1.17.1-1)
#------------------------------------------------------------------------------

CurVer='2023-06-17'
Progrm=${0##*/}

Usage() {
	read -d '' <<-EOF
		Usage: $Progrm [OPTS]

		  -h, --help               - Display this help information.
		  -v, --version            - Output the version datestamp.
	EOF

	printf '%s' "$REPLY"
}

while [[ -n $1 ]]; do
	case $1 in
		--help|-h)
			Usage; exit 0 ;;
		--version|-v)
			printf '%s\n' "$CurVer"; exit 0 ;;
		*)
			printf 'Err: Incorrect argument(s) specified.\n' 1>&2
			exit 1 ;;
	esac
	shift
done

if ! type -P wget &> /dev/null; then
	printf "Err: Dependency 'wget' not met.\n" 1>&2
	exit 1
fi

printf 'Checking DistroWatch ... '

URL='https://distrowatch.com/news/news-headlines.xml'
if Data=$(wget -qO - -U 'Mozilla/5.0' "$URL" 2>&1); then
	printf '[\e[92mOK\e[0m]\n'
else
	exit 1
fi

Buffer=
TagFound=
Titles=()
TitleFound=
while read -N 1 Char; do
	[[ $Char == $'\n' ]] && continue
	if [[ $TitleFound == True ]]; then
		if [[ $Char == '<' ]]; then
			Titles+=("$Buffer")

			Buffer=
			TagFound=
			TitleFound=
		fi

		Buffer+=$Char
	elif [[ $TagFound == True ]]; then
		Buffer+=$Char

		if (( ${#Buffer} == 7 )); then
			if [[ $Buffer == '<title>' ]]; then
				TitleFound='True'
			fi

			Buffer=
		fi
	elif [[ $Char == '<' ]]; then
		TagFound='True'
	fi
done <<< "$Data"

printf 'Parsing RSS feed ... '

Len=${#Titles[@]}
if (( Len > 0 )); then
	printf '[\e[92mOK\e[0m]\n'
else
	printf '[\e[91m!\e[0m]\n'
	exit 1
fi

shopt -s checkwinsize; (:)

printf '\n'

for Title in "${Titles[@]}"; {
	printf '  \e[92m-\e[0m %s\n' "${Title:0:$COLUMNS - 1}"
}

printf "\nFound \e[92m%'d\e[0m post(s).\n" $Len