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#!/bin/sh

# elvis: sbo             -- Search SlackBuilds.org packages

# Author: B. Watson (yalhcru at gmail)
# Licensed under the WTFPL. See http://www.wtfpl.net/txt/copying/ for details.

. surfraw || exit 1

if [ "$( type -p wget )" = "" ]; then
	err "wget is required for this. please install it."
fi

get_slack_ver() {
	local ver sitevers topver i

	# initially set to the currently running version, if we can
	if [ -e /etc/slackware-version ]; then
		ver="$( cut -d' ' -f2 < /etc/slackware-version )"
	fi

	# now check the site, make sure it's a supported version (e.g. not -current)
	sitevers="$(
		wget -qO- "https://slackbuilds.org" | \
		grep -A1 '<select *name="sv"'      | \
		tail -1                            | \
		sed \
			-e 's,^[[:space:]]*,,' \
			-e 's,<option value="[^"]*"[^>]*>\([0-9][^"]*\)</option>,\1 ,g' \
			-e 's,[[:space:]]*</select>.*,,'
		)"

		# if we can't get the local version *or* the list of versions
		# from the site, just take a wild guess.
		if [ -z "$sitevers" ]; then
			echo "${ver:-14.2}"
			return
		fi

		for i in $sitevers; do
			topver="$i"
			if [ "$i" = "$ver" ]; then
				echo "$ver"
				return
			fi
		done

	# fall back to the highest-numbered version on the site
	echo "$topver"
	return
}

w3_config_hook() {
	def SURFRAW_slack_version "$( get_slack_ver )"
}

w3_usage_hook() {
	cat <<EOF
Usage: $w3_argv0 [options] [search words]...
Description:
  Surfraw search builds/maintainers/dependencies on SlackBuilds.org
Local options:
  -ver=VERSION                  Slackware version (Currently $SURFRAW_slack_version)
  -m                            Maintainer search (name or email)
  -r                            Reverse dependency search
  -u                            URL search (download/homepage)
Notes:
-ver is ignored with -m, -r, -u (only latest stable is supported)
If -m is not given, but the search term has an @ in it, it's assumed to be
an email address and -m is enabled.
If -u is not given, but the search term looks like a URL, -u is enabled.
EOF
# forward dependency search not yet implemented on site:
# -d                            Dependency search
	w3_global_usage
}

w3_parse_option_hook() {
	opt="$1"
	optarg="$2"

	case "$opt" in
		-v*=*) setopt SURFRAW_slack_version "$optarg" ;;
		-m)    stype=maint  ;;
		-r)    stype=revdep ;;
		*)   return 1 ;;
	esac

	return 0
}

w3_config
w3_parse_args "$@"
case "$w3_args" in
	*@*) stype=maint ;;
	*://*) stype=url ;;
esac

escaped_args="$( w3_url_of_arg $w3_args )"
if [ "$stype" = "" ]; then
	url="https://slackbuilds.org/result/?search=${escaped_args}&sv=${SURFRAW_slack_version}"
else
	url="https://slackbuilds.org/advsearch.php?stype=$stype&q=${escaped_args}"
fi
w3_browse_url "$url"