#!/bin/sh

# Let's set a sane environment
set -o errexit
set -o nounset
set -o noglob

SCRIPTS_DIR="$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)"
. "$SCRIPTS_DIR/common"

printf 'Downloading PECL feed... ' >&2
XML="$(curl --fail  --silent --show-error --location https://pecl.php.net/feeds/latest.rss)"
printf 'done.\n' >&2

printf 'Formatting XML... ' >&2
XML="$(printf '%s' "$XML" | tr -s ' \t\r\n' ' ' | sed -r 's# *<#\n<#g' | sed -r 's#>\n*#>\n#g' | tr -s '\n' '\n' | sed -r 's#^ +##g')"
printf 'done.\n' >&2

NUM_EXTENSIONS=0
EXTENSIONS=''
printf 'Detecting extension list... ' >&2
IFS='
'
for XML_LINE in $XML; do
	case "$XML_LINE" in
		\<item\ *)
			URL="$(printf '%s' "$XML_LINE" | sed -r 's#^.+ rdf:about\s*=\s*"##' | sed -r 's#".*$##')"
			EXTENSION="$(printf '%s' "$URL" | sed -r 's#^.*[?&]package=##' | sed -r 's#&.*$##' | tr '[:upper:]' '[:lower:]')"
			if test -n "$EXTENSION" && ! stringInList "$EXTENSION" "$EXTENSIONS"; then
				EXTENSIONS="$EXTENSIONS $EXTENSION"
				NUM_EXTENSIONS=$((NUM_EXTENSIONS + 1))
			fi
			;;
	esac
done
if test -z "$EXTENSIONS"; then
	printf 'no extension found.\n' >&2
else
	EXTENSIONS="${EXTENSIONS# }"
	printf '%d extension(s) found (%s)\n' $NUM_EXTENSIONS "$EXTENSIONS" >&2
fi
printf '%s' "$EXTENSIONS"