#!/bin/bash

header () {
echo """<?xml version='1.0' encoding='UTF-8' ?>
<rss version='2.0' xmlns:atom='http://www.w3.org/2005/Atom'>
<!-- Made using rss-roller https://github.com/maxhebditch/rss-roller -->
""" > ~/feedtop
echo """
<channel>
<title>$title</title>
<link>$link</link>
<description>$description</description>
<atom:link href='$rsslink' rel='self' type='application/rss+xml' />
""" >> ~/feedtop
echo "adding the header"
}

footer () {
echo """
</channel>

</rss>
""" >> ~/feedbottom
echo "adding the footer"
}

item () {
if [[ $mode == "a" ]]; then
        echo """<item>
        <title>$fullTitle</title>
        <link>$linkadd</link>
        <guid>$guid</guid>
        <description>$extract</description>
        </item>
        """ >> ~/feed
elif [[ $mode == "m" ]]; then
        echo """<item>
        <title>$fullTitle</title>
        <link>$linkadd</link>
        <guid isPermaLink='false'>$guidadd</guid>
        <description>$extract</description>
        </item>
        """ >> ~/feed
fi
}

combine () {
        header
        footer
        cat ~/feedtop ~/feed > ~/feedtb
        cat ~/feedtb ~/feedbottom > $feedname
        rm ~/feedtop ~/feed ~/feedtb ~/feedbottom
}

makeRSS () {
        echo "feed does not exit already, going to make from scratch"
        echo """
        CONFIGURATION
        =============
        """
        read -p "What is your website called?: (e.g Google) " title
        read -p "What is the link to the website?: (e.g http://google.com) " link
        read -p "Give a brief description of your website: (e.g A search engine) " description
        read -p "Give the URL to where the rss feed will live: (e.g http://google.com/rssfeed.xml) " rsslink
        read -p "What will be the feed file live on the disk?: (e.g /home/dog/www/rssfeed.xml has to match above) " feedname
        read -p "Where is the file path for the posts? (leave blank if you are not using auto mode): " postDir
        echo -e "title=$title\nlink=$link\ndescription='$description'\nrsslink=$rsslink\nfeedname=$feedname\npostDir=$postDir" > ~/.rss-roller.rc
        echo "please run rss-roller again with the --auto or --manual flags"
        exit
}
        
if [[ ! -f ~/.rss-roller.rc ]]; then
        makeRSS
fi

source ~/.rss-roller.rc

if [[ ! -f $feedname ]]; then
        touch $feedname
fi


if [[ $1 == "--auto" ]]; then
        mode=a
        #Do the bad thing
        if [[ -f $feedname ]]; then
                rm $feedname
        fi
        touch $feedname
        postArray=( $(ls -r "$postDir"/*.html) )
        numPosts=$(ls "$postDir"/*.html | wc -l)
        echo "numposts is $numPosts"
        postNum=0
        guidadd=$linkadd
        for posts in "${postArray[@]}"; do
                let postNum+=1
                post=$posts
                echo "adding post $postNum/$numPosts"
                fullTitle=$(grep -o '>.*</h1>' $post | sed 's/\(>\|<\/h1>\)//g')
                postname=${post##*/}
                linkadd="$link"/"$postname"
                extract=$(sed -n '/<p>.*/,/*.<\/p>/{p;q;}' $post | sed -e 's/<[^>]\+>/ /g' -e 's|<p>||g' -e 's|</p>||g' -e 's|"||g')
                item $post
        done
        combine
        exit
fi

if [[ $1 == "--manual" ]]; then
        mode=m
        echo """
        NEW POST
        =======
        """
        read -p "What is the title of the new update?: " fullTitle
        read -p "What is the link of the new update? (http://blog.nowherejezfoltodf4jiyl6r56jnzintap5vyjlia7fkirfsnfizflqd.onion/): " linkadd
        read -p "Provide a description of the new update: " extract
        read -p "Provide a unique identifier for the update: " guidadd
        if [[ -f $feedname ]]; then
                sed -e '1,10d' $feedname > ~/rssrollertopless
                head -n -4 ~/rssrollertopless > ~/rssrollertopandbottomless
                mv ~/rssrollertopandbottomless $feedname-old
                rm ~/rssrollertopless
                rm $feedname
        else
                touch $feedname
        fi
        item
        if [[ -f $feedname-old ]]; then
                mv ~/feed ~/feedtop
                cat ~/feedtop $feedname-old > ~/feed
                rm $feedname-old ~/feedtop
        fi
        combine
        exit
fi

if [[ $# == 0 ]]; then
        echo "please use the --auto or --manual flag"
fi