#!/usr/bin/bash

#Dependencies:
# yq
# curl

mkdir -p ./{cache,state,Podcasts}
# rm -rf ./cache/*

YQ=~/bin/yq

yqf() {
		$YQ "$1" config.yaml
}

export ALL_PROXY="socks5h://127.0.0.1:9050"

download() {
		local e name url limit mp3url
		e=$1
		name=$(yqf "${e}.name")
		url=$(yqf "${e}.url")
		# limit=$(yqf "${e}.limit")
		limit=2
		filter=$(yqf "${e}.filter // true")

		local rss_path="cache/${name}.rss" 
		local downloads_path="state/${name}.downloads"

		false && curl -L -o "$rss_path" "$url"
		#limit=$limit $YQ -p xml '.rss.channel.item[] | keys | .[] | select(. < env(limit)) | .[]' "$rss_path"
		items=".rss.channel.item"

		ids=$($YQ -p xml "$items | .[] | select($filter) | path | .[-1]" "$rss_path" | 
				head -n "$limit")

		for id in $ids
		do
				echo "id is $id"
				#$YQ -p xml "$items.$id | (.title |= .[0]) | .title" "$rss_path"
				mp3url=$($YQ -p xml "$items.$id | .enclosure.+url" "$rss_path")
				grep -q --fixed-strings "$mp3url" "$downloads_path" && continue
				echo "Downloading: $mp3url"
				echo "$mp3url" >> "$downloads_path"
		done
}

entries=".entries"
for id in $(yqf "$entries | .[] | path | .[-1]")
do
		echo "============================ start ============================"
		download "${entries}.$id" 
		# exit
		echo "============================ done ============================"
done