fn delete_post{
	a_dir=$barf_root/$"barf_dir/src/$a_id
	if(test -d $a_dir){
		rm -rf $a_dir &&
		{echo ',x/^'$a_id'\/.*\n/d'; echo w; echo q} | sam -d $barf_root/$"barf_dir/tags >[2]/dev/null
	}
	post_redirect $base_url^$barf_base_uri
}

fn display_footer{
	if(test -f $barf_root/$"barf_dir/_werc/barf/footer)
		cat $barf_root/$"barf_dir/_werc/barf/footer
	if not if(test -f $barf_root/_werc/barf/footer)
		cat $barf_root/_werc/barf/footer
	if not
		cat apps/barf/barf/footer
}

fn display_header{
	if(test -f $barf_root/$"barf_dir/_werc/barf/header)
		cat $barf_root/$"barf_dir/_werc/barf/header
	if not if(test -f $barf_root/_werc/barf/header)
		cat $barf_root/_werc/barf/header
	if not
		cat apps/barf/barf/header
}

fn display_login{
	echo '<div id="login">
	<form method="post" action="/">
	<input type="hidden" name="a_func" value="login">
	username: <input type="text" name="user_name"><br> 
	password: <input type="password" name="user_password"><br> 
	<input name="s" type="submit" value="login"> 
	</form>
	</div>'
}

fn display_prevnext{
	if(test $stop -gt `{echo 1+^$posts_per_page | bc}){
		nprev=`{echo $start^-1-^$posts_per_page | bc}
		prev='<span>
		<a href="'$base_url^$barf_base_uri'?tags='$"tags'&start='$"nprev'">prev</a> | 
		</span>'
	}
	if(test $#posts -gt $posts_per_page){
		nnext=`{echo $stop^+1 | bc}
		next='<span>
		<a href="'$base_url^$barf_base_uri'?tags='$"tags'&start='$"nnext'">next</a>
		</span>'
	}
	echo '<div id="page_list">
	'$"prev'
	'$"next'
	</div>'
}

fn display_sidebar{
	if(test -f $barf_root/$"barf_dir/_werc/barf/sidebar)
		cat $barf_root/$"barf_dir/_werc/barf/sidebar
	if not if(test -f $barf_root/_werc/barf/sidebar)
		cat $barf_root/_werc/barf/sidebar
	if not
		cat apps/barf/barf/sidebar
}

fn dsrc{
	low=`{ls -p $barf_root/$"barf_dir/src | sort -n | sed 1q}
	high=$a_id
	if(~ $#low 1 && ~ $#high 1){
		cd $barf_root/$"barf_dir/src && rm -rf `{seq $low $high} &&
		{
			for(i in `{seq $low $high})
				echo ',x/^'$i'\/.*\n/d'
			echo w
			echo w
			echo q
		} | sam -d $barf_root/$"barf_dir/tags >[2]/dev/null
	}
	post_redirect $base_url^$barf_base_uri
}

fn edit_form{
	if(~ $#a_id 0)
		name=add
	if not{
		name=update
		a_dir=$barf_root/$"barf_dir/src/$a_id
		for(x in $barf_items){
			if(~ $x img)
				a_img=`{ls -p $a_dir/img | sed 1q}
			if(~ $x tags)
				a_tags=`{ls -p $a_dir/tags}
			if not
				$x=`{cat $a_dir/$x}
		}
	}
	echo '<div id="list">
	<form action="/" method="post" name="edit" id="button">
	<input type="hidden" name="fake" value="fake">
	<input type="text" name="url" style="display: none;">
	<input type="hidden" name="a_func" value="edit_post">'
	if(~ $name update)
		echo '<input type="hidden" name="a_id" value="'$"a_id'">'
	for(x in $barf_items){
		if(~ $x body){
			echo '<div id="edit_body">' \
			'body:<br>' \
			'<textarea name="a_body">'
			if(~ $name update)
				cat $a_dir/body
			echo '</textarea></div>'
		}
		if not if(~ $x img){
			echo '<div id="edit_img">' \
			'image:<br>' \
			'<input name="a_img"  type="text" value="'$"a_img'" id="edit"> &nbsp;&nbsp;' \
			'download: <input name="a_download" type="checkbox" value="1">' \
			'</div>'
		}
		if not if(~ $x tags){
			echo '<div id="edit_tags">' \
			'tags: &nbsp;&nbsp;(space separated list of tags)<br>' \
			'<input name="a_tags" type="text" value="'$"a_tags'" id="edit">' \
			'</div>'
		}
		if not{
			echo '<div id="edit_'$"x'">' \
			$"x':<br>' \
			'<input name="a_'$"x'" type="text" value="'$"$x'" id="edit">' \
			'</div>'
		}
	}
	echo '<div id="edit_submit">' \
	'<input type="submit" name="'$name'" value="'$name'">' \
	'</div>
	</form>
	</div>'
}

fn edit_post{
	if(~ $#a_id 0){
		a_id=`{echo `{ls -p $barf_root/$"barf_dir/src | sort -n | tail -1}^+1 | bc}
		if(~ $#a_id 0)
			a_id=1
		while(test -d $barf_root/$"barf_dir/src/$a_id)
			a_id=`{echo $a_id^+1 | bc}
	}
	a_dir=$barf_root/$"barf_dir^src/$a_id
	mkdir -p $a_dir/img $a_dir/tags
	rm -f $a_dir/tags/*
	for(x in $barf_items){
		if(~ $x date){
			if(! ~ $#a_date 0)
				echo $"a_date >$a_dir/date
			if not
				date >$a_dir/date
		}
		if not if(~ $x tags){
			if(! ~ $#a_tags 0){
				a_tags=`{echo $"a_tags | sed 's/[^A-Za-z0-9_\- ]//g'}
				ifs=' '{a_tags=`{echo -n $a_tags}}
				{
					t=1
					while(test $t -le $#a_tags){
						>$a_dir/tags/$a_tags($t)
						t=`{echo $t^+1 | bc}
					}
				}
				for(i in $a_tags)
					echo $a_id'/tags/'$i >>$barf_root/$"barf_dir/tags
			}
		}
		if not if(! ~ $x img tags){
			item='a_'$"x
			if(! ~ $$item ''){
				>$a_dir/$x
				echo $$item >$a_dir/$x
			}
		}
	}
	if(~ $a_download 1){
		switch($barf_type){
		case image
			rm -f $a_dir/img/*
			img=$a_dir/img/^`{date -n}^.^`{echo $"a_img |
				sed 's/^.*\.(gif|GIF)$/gif/g;
					s/^.*\.(jpg|jpeg|JPG|JPEG)$/jpg/g;
					s/^.*\.(png|PNG)$/png/g;
					s/^.*\.(tif|TIF|tiff|TIFF)$/tif/g'
			}
			thumb=$a_dir/img/small.^`{basename $img | sed 's/\..*$//g'}^.png
			if(test -f /boot/factotum){
				@{
				rfork n
				if(test -f /rc/bin/hget)
					webfs
				hget $"a_img >$img
				#magick/convert $img -resize 500x600 $thumb
				switch($img){
				case *.bmp
					cmd=bmp
				case *.gif
					cmd=gif
				case *.ico
					cmd=ico
				case *.jpg
					cmd=jpg
				case *.png
					cmd=png
				case *.tif
					cmd=tif
				case *.tga
					cmd=tga
				}
				$cmd -9et <$img | resample -x 500 | topng >$thumb
				}
			}
			if not{
				curl -s -o $"a_img >$img
				convert $img -resize 500x600 $thumb
			}
		case url
			if(test -f /boot/factotum){
				@{
				rfork n
				if(test -f /rc/bin/hget)
					webfs
				hget $"a_link | htmlfmt | fmt >$a_dir/body
				}
			}
			if not
				curl -s $"a_link | htmlfmt | fmt >$a_dir/body
		}
	}
	if(! ~ $gp 1)
		post_redirect $base_url^$barf_base_uri
}

fn get_post_list{
	if(~ $id [0-9]*)
		posts=$id
	if not{
		posts=`{
			if(~ $show_ascending 1)
				sort=(sort -n)
			if not
				sort=(sort -nr)
			if(~ $tags all)
				ls -p $barf_root/$"barf_dir/src |
					grep -e '^[0-9]*$' |
					eval $sort |
					sed -n $start^,^$stop^p # awk 'NR=='$start',NR=='$stop' {print;}'
			if not
				grep -e '^.*\/'$tags'$' $barf_root/$"barf_dir/tags |
					awk -F '/' '{print $1;}' |
					eval $sort |
					uniq |
					sed -n $start^,^$stop^p
		}
		if(! ~ $posts [0-9]*)
			posts=()
	}
}

fn get_start{
	if(~ $#start 0)
		start=1
}

fn get_stop{
	if(~ $#stop 0)
		stop=`{echo $start^+^$posts_per_page | bc}
}

fn get_tags{
	if(~ $#tags 0)
		tags=all
}

fn load_get_args{
	if(~ $REQUEST_METHOD GET && ~ $#get_args 0 && ~ $REQUEST_URI *'='*){
		ifs='&' {
			a=`{echo $"REQUEST_URI | sed 's/(^\/|#.*$)//g'}
			for(pair in $a){
				ifs='=' { pair=`{echo -n $pair} }
					n='get_arg_'^`{echo $pair(1) | urldecode | tr -cd 'a-zA-Z0-9_'}
					get_args=( $get_args $n )
					ifs=() { $n=`{echo -n $pair(2) | urldecode | tr -d '
'} }
			}
		}
		pair=()
	}
}

fn parse_get_args{
	if(! ~ $#get_arg_a_func 0)
		a_func=`{echo $get_arg_a_func | tr -cd 'a-zA-Z0-9_'}
	if(! ~ $#get_arg_a_id 0)
		a_id=`{echo $get_arg_a_id | tr -cd '0-9'}
	if(! ~ $#get_arg_id 0)
		id=`{echo $get_arg_id | tr -cd '0-9'}
	if(! ~ $#get_arg_start 0)
		start=`{echo $get_arg_start | tr -cd '0-9'}
	if(! ~ $#get_arg_stop 0)
		stop=`{echo $get_arg_stop | tr -cd '0-9'}
	if(! ~ $#get_arg_tags 0)
		tags=`{echo $get_arg_tags | tr -cd 'a-zA-Z0-9_-'}
}

fn parse_post_args{
	for(x in $barf_items){
		a='a_'$"x
		p='post_arg_'$"a
		$a=$$p
	}
	if(~ $#post_arg_a_download 0 1)
		a_download=$post_arg_a_download
	if(! ~ $#post_arg_a_func 0)
		a_func=`{echo $post_arg_a_func | tr -cd 'a-zA-Z0-9_'}
	if(! ~ $#post_arg_fake 0)
		fake=`{echo $post_arg_fake | tr -cd 'a-zA-Z0-9_-'}
	if(! ~ $#post_arg_a_id 0)
		a_id=`{echo $post_arg_a_id | tr -cd '0-9'}
	if(! ~ $#post_arg_url 0)
		url=$post_arg_url
}

fn print_edit{
	edit='<a href="'$base_url^$barf_base_uri'?a_func=edit_form&a_id='$"a_id'">edit</a>'
	delete='<a href="'$base_url^$barf_base_uri'?a_func=delete_post&a_id='$"a_id'" onclick="return confirm(''are you sure you want to delete?'');">delete</a>'
	dsrc='<a href="'$base_url^$barf_base_uri'?a_func=dsrc&a_id='$"a_id'" onclick="return confirm(''are you sure you want to dsrc?'');">dsrc</a>'
	echo $"edit' | '$"delete' | '$"dsrc
}

fn print_id{
	echo '<span id="post_id"><a href="/?id='$"a_id'">No.'$"a_id'</a></span>'
}

fn print_img{
	a_img=`{ls -p $a_dir/img/[0-9]*}
	a_thumb=`{ls -p $a_dir/img/small*}
	if(! ~ $#a_img 0)
		if(~ $#a_thumb 0)
			a_thumb=$a_img
	echo '<a href="'$base_url^$barf_base_uri'src/'$a_id'/img/'$a_img'" target="_b"><img src="'$base_url^$barf_base_uri'src/'$a_id'/img/'$a_thumb'" border="0"></a>'
}

fn print_tags{
	a_tags=`{ls -p $a_dir/tags}
	a_tags=`{for(t in $a_tags) echo '<a href="'$base_url^$barf_base_uri'?tags='$t'">'$t'</a>, '}
	a_tags=`{echo $a_tags | awk '{print substr($0, 1, length($0) -1)}'}
	echo '<span id="post_tags">'$"a_tags'</span>'
}

fn print_title{
	a_title=`{cat $a_dir/title}
	if(! ~ $#a_title 0){
		if(~ $barf_type log url)
			echo '<a href="'`{cat $a_dir/link}'">'$"a_title'</a>'
		if not
			echo '<a href="'$base_url^$barf_base_uri'?id='$"a_id'">'$"a_title'</a>'
	}
}

fn redirect_bots{
	if(! ~ $fake fake || ! ~ $url '')
		post_redirect http://google.com
}

fn urldecode {
awk '
BEGIN {
    hextab ["0"] = 0; hextab ["8"] = 8;
    hextab ["1"] = 1; hextab ["9"] = 9;
    hextab ["2"] = 2; hextab ["A"] = hextab ["a"] = 10
    hextab ["3"] = 3; hextab ["B"] = hextab ["b"] = 11;
    hextab ["4"] = 4; hextab ["C"] = hextab ["c"] = 12;
    hextab ["5"] = 5; hextab ["D"] = hextab ["d"] = 13;
    hextab ["6"] = 6; hextab ["E"] = hextab ["e"] = 14;
    hextab ["7"] = 7; hextab ["F"] = hextab ["f"] = 15;
}
{
    decoded = ""
    i = 1
    len = length ($0)
    while ( i <= len ) {
        c = substr ($0, i, 1)
        if ( c == "%" ) {
            if ( i+2 <= len ) {
                c1 = substr ($0, i+1, 1)
                c2 = substr ($0, i+2, 1)
                if ( hextab [c1] == "" || hextab [c2] == "" ) {
                    print "WARNING: invalid hex encoding: %" c1 c2 | "cat >&2"
                } else {
                    code = 0 + hextab [c1] * 16 + hextab [c2] + 0
                    c = sprintf ("%c", code)
                    i = i + 2
                }
            } else {
                print "WARNING: invalid % encoding: " substr ($0, i, len - i)
            }
        } else if ( c == "+" ) {
            c = " "
        }
        decoded = decoded c
        ++i
    }
    printf "%s", decoded
}
'
}