dl-ubuntu-podcasts

#!/bin/bash

#----------------------------------------------------------------------------------
# Project Name      - dl-ubuntu-podcasts
# Started On        - Sat  7 Oct 19:08:59 BST 2017
# Last Change       - Wed  4 Apr 08:21:09 BST 2018
# Author E-Mail     - terminalforlife@yahoo.com
# Author GitHub     - https://github.com/terminalforlife
#----------------------------------------------------------------------------------
# This really needs a rewrite; it's pretty sloppy. If this is something you'd be
# interested in, please let me know.
#----------------------------------------------------------------------------------

_VERSION_="2018-04-04"

XERR(){ printf "[L%0.4d] ERROR: %s\n" "$1" "$2" 1>&2; exit 1; }
ERR(){ printf "[L%0.4d] ERROR: %s\n" "$1" "$2" 1>&2; }

#TODO - Currently won't download S01E01.
#TODO - IMPORTANT: Fix filenames; they're a mess. :(

USAGE(){
	while read -r; do
		printf "%s\n" "$REPLY"
	done <<-EOF
		            DL-UBUNTU-PODCASTS ($_VERSION_)
		            Written by terminalforlife (terminalforlife@yahoo.com)

		            Simple program to download all of the old Ubuntu Podcast episodes.

		SYNTAX:     dl-ubuntu-podcasts [OPTS] PAGE PAGE PAGE . . .

		OPTS:       --help|-h|-?            - Displays this help information.
		            --version|-v            - Output only the version datestamp.
		            --quiet|-q              - Runs in quiet mode. Errors still output.
		            --debug|-D              - Enables the built-in bash debugging.
		            --dest|-d PATH          - Where PATH is an alternative destination.
		            --get-season-eight      - Grab the newer episodes from season eight.
		            --get-season-nine       - Grab the newer episodes from season nine.
		            --get-season-ten        - Grab the newer episodes from season ten.

		NOTE:       Files will by default be saved in OGG to the current directory.

		            Using one of the extra season flags will download all of the available
		            podcasts in that given season.

		SITES:      Seasons 1-7:     http://podcast.ubuntu-uk.org
		            Seasons 8-10:    http://static.ubuntupodcast.org
	EOF
}

while [ "$1" ]; do
	case "$1" in
		--help|-h|-\?)
			USAGE; exit 0 ;;
		--version|-v)
			printf "%s\n" "$_VERSION_"
			exit 0 ;;
		--quiet|-q)
			BEQUIET="true" ;;
		--debug)
			DEBUGME="true" ;;
		--dest|-s)
			shift

			ALTDEST="$1"
			if ! [ -d "$ALTDEST" ]; then
				XERR "Destination directory not found."
			fi ;;
		--get-season-eight)
			EXTRA="08 01 42" ;;
		--get-season-nine)
			EXTRA="09 01 44" ;;
		--get-season-ten)
			EXTRA="10 01 38" ;;
		*)
			break ;;
	esac
	shift
done

if ! [ -x /usr/bin/wget ]; then
	XERR "$LINENO" "Dependency '/usr/bin/wget' not met."
fi

read -a WGET_VER_LINE <<< "$(/usr/bin/wget --version)"
WGET_VERSION=0${WGET_VER_LINE[2]//[!0-9]}
if [ $WGET_VERSION -ge 01192 -a $WGET_VERSION -lt 01194 ]; then
	NOWARC="--no-warc-compression"
fi

EXTRA_SEASON(){
	for E in `eval printf "%d\\\\\n" {$2..$3}`; {
		printf "%s\n" "$E"
	}

	URL="http://static.ubuntupodcast.org/ubuntupodcast"
	/usr/bin/wget $NOWARC -qc --show-progress\
		"$URL/s${1}/e${E}/ubuntupodcast_s${1}e${E}.mp3"
}

if [ "$EXTRA" ]; then
	case "$EXTRA" in
		8)
			EXTRA_SEASON $EXTRA ;;
		9)
			EXTRA_SEASON $EXTRA ;;
		10)
			EXTRA_SEASON $EXTRA ;;
	esac
fi

if [ "$*" ]; then
	USERPAGE="true"

	while [ -n "$1" ]; do
		if ! [[ "$1" =~ [0-9]+ ]]; then
			XERR "$LINENO" "Incorrect page number specified."
		else
			[ $1 -eq 2 ] || NUM+=" $1"
		fi

		shift
	done
else
	NUM=193
fi

[ "$BEQUIET" == "true" ] && exec 1> /dev/null
[ "$DEBUGME" == "true" ] && set -x

while :; do
	if ! [ "$USERPAGE" == "true" ]; then
		[ $NUM -le 2 ] && break || let NUM--
	else
		NUM="${NUM%% *}"
	fi

	#TODO - Fix custom pages not working.

	PAGE=`/usr/bin/wget $NOWARC -q "http://podcast.ubuntu-uk.org/page/$NUM" -O -`
	DL_LINK_MATCH="http://podcast\.ubuntu-uk\.org/download/.*\.ogg"
	OUTNAME_MATCH="[Ss][0-9]+[Ee][0-9]+\s+–\s+[[:space:][:alnum:]]+"

	while read; do
		if [[ "$REPLY" =~ $DL_LINK_MATCH ]]; then
			[ "$DL_LINK" ] || DL_LINK="$REPLY"
		elif [[ "$REPLY" =~ $OUTNAME_MATCH ]]; then
			[ "$OUTNAME" ] || OUTNAME="$REPLY"
		elif [ "$DL_LINK" -a "$OUTNAME" ]; then
			break
		fi
	done <<< "$PAGE"

	if [ -z "$ALTDEST" ]; then
		printf "NUM:         %s\n" "$NUM"
		printf "OUTNAME:     %s\n" "$OUTNAME"
		[ -z "$OUTNAME" ] && break
		/usr/bin/wget $NOWARC -cq --show-progress\
			"$DL_LINK" -O "./${OUTNAME}.ogg"
	else
		[ -z "$OUTNAME" ] && break
		/usr/bin/wget $NOWARC -cq --show-progress\
			"$DL_LINK" -O "${ALTDEST%\/}/${OUTNAME}.ogg"
	fi

	[ "$USERPAGE" == "true" ] || NUM="${NUM/* }"

	if ! [ "$NUM" ]; then
		break
	fi
done

# vim: ft=sh noexpandtab colorcolumn=84 tabstop=8 noswapfile nobackup