#!/bin/bash
# Copyright 2012 Christoph Langner
# 
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# 
#   http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

######### About
# zdf-dl let's you download video streams from the no-flash version
# of the zdf mediathek to your harddisk using curl and mplayer
# http://www.zdf.de/ZDFmediathek/hauptnavigation/startseite?flash=off

######### Dependencies
#  - Curl
#  - xmlstarlet

######### Changelog
# Version 1.1
#  - Adapted to current zdf mediatek (Thanks Markus!)
#  - New dependency xmlstarlet
# Version 1.0.2
#  - Check if HTML-Version is used
#  - Disabled lirc-support in mplayer, removing error message
#  - Curl stuff before mplayer call not necessary
# Version 1.0.1
#  - Get filename out of url
#  - Fixed variables
# Version 1.0
#  - Initial Release


## Check for adb and imagemagick
command -v curl >/dev/null 2>&1 || {
        echo >&2 "Please install curl.  Aborting.";
        exit 1;
}

command -v xmlstarlet >/dev/null 2>&1 || {
        echo >&2 "Please install xmlstarlet.  Aborting.";
        exit 1;
}

# Get url to video stream out of the no flash version of the zdf mediathek
url_noflash="$1"
url_stream=$(curl -s ${url_noflash} | grep asx | grep -o 'http://[^"]*')

# Check if No Flash Mediathek is used
if [[ "${url_noflash}" != *flash=off* ]]
then
 	echo "Die übergebene URL zeigt nicht auf die HTML-Version der Mediathek!";
 	echo "Bitte klicke auf der Webseite der Mediathek links unten auf \"HTML-Version\" ";
	echo "oder öffne die folgende URL im Browser:"
	echo "http://www.zdf.de/ZDFmediathek/hauptnavigation/startseite?flash=off"
	exit
fi

mov_id=$(echo "${url_noflash}" | grep -oP "(?<=http://www.zdf.de/ZDFmediathek/beitrag/video/)[^/]+")
echo "Film id: ${mov_id}"
 
url_xmlfile=$(echo "http://www.zdf.de/ZDFmediathek/xmlservice/web/beitragsDetails?id=${mov_id}")
echo "Pfad xml-Datei: ${url_xmlfile}"
 
xmlfile=$(curl -s ${url_xmlfile})
 
# Extract from xml-file the elements "formitaet", then search for "veryhigh", then for filename pattern
url_stream=$(echo ${xmlfile}  | xmlstarlet sel -t -m '//formitaet' -v . -n | grep -n1 'veryhigh' | grep -o 'http://rodl.zdf.de/none/zdf[^"]*.mp4')
 
# Get stream and save it to disk
echo "Lade ${url_stream}  herunter, bitte haben Sie etwas Geduld..."
wget -c ${url_stream}