#!/bin/bash
#
#
####################################################################################
# script che recupera l'ultimo podcast del  gr1   
#
#v:1.0  Novembre 2020                                                          
#
# dipendenze: curl,jq,cat,wget,ffmpeg
#
#
####################################################################################

# set global variable

gr1api="https://www.raiplayradio.it/programmi/gr1/?json"
grbase="https://www.raiplayradio.it"
ag="Mozilla/5.0 (Windows NT 10.0; WOW64; rv:40.0) Gecko/20100101 Firefox/56.0"


# remove old jason data
rm ./data/gr1.json
rm ./data/Lgr1.json


# get  jason data
curl -A "$ag"  "$gr1api" -o data/gr1.json
echo " "
echo "get data api... done!"
echo " "


# extract jason data of the last podcast

dataL=`cat ./data/gr1.json | jq -r ."pathFirstItem"`

echo " "
echo log: $dataL
echo " "

curl -A "$ag" "$grbase$dataL" -o data/Lgr1.json

Lpodcast=`cat ./data/Lgr1.json | jq -r '.["audio"] | .contentUrl'`

echo " "
echo log: $Lpodcast
echo " "


# extract time and date  onair podcast 

ora=`cat ./data/Lgr1.json | jq -r ."timePublished"`
Ora=`echo $ora | sed -e 's/\ /\n/g' | grep ":"| sed -e 's/\:/\_/g'`

data=`cat ./data/Lgr1.json | jq -r ."datePublished"`
Data=`echo $data | sed -e 's/\//\-/g'`

echo " "
echo log: $Data $Ora
echo " "
echo " "


# download podcast

wget -d -c -U "$ag" "$Lpodcast" -O gr1_"$Data"_"$Ora".mp3

# encode audio data... small file

#ffmpeg -i gr1_"$Data"_"$Ora".mp3 -vn -acodec aac -ab 80k gr1_"$Data"_"$Ora".m4a
ffmpeg -i gr1_"$Data"_"$Ora".mp3 -acodec libopus -b:a 64k gr1_"$Data"_"$Ora".opus
rm gr1_"$Data"_"$Ora".mp3