# Image stream.
# Inspired by https://img.texto-plano.xyz.

MKSHELL=rc
IMGTYPES=png jpg jpeg gif
TARG=`{ls -t | grep -i '\.(png|jpe?g|gif)$' >[2] /dev/null | sed 20q}
ALTS=`{ls $TARG^.alt >[2] /dev/null}
CAPTIONS=`{ls $TARG^.caption >[2] /dev/null}
BASEURL='http://a.9srv.net/img'

update:VQ:	index index.atom feed.json mkfile	# _timestamps
#	echo $IMGTYPES – $TARG $ALTS $CAPTIONS

clean:VQ:
	rm -f index index.html >[2] /dev/null
	{cat _header
	echo '<h1>There are no entries in the current blog.</h1>'
	cat _footer} > index.html

#%:	_header _footer

# If an entry doesn't have a timestamp, make one from mod time or now.
_timestamps:Q:	$TARG
	for (i in $TARG) {
		if (! grep -s '	'$i'$' $target >[2] /dev/null) {
			echo 'adding timestamp for' $i
			t=`{stat $i || date -n}
			echo $t'	'$i >> $target
		}
	}
	touch $target

index:Q:	_header _footer _timestamps $TARG $ALTS $CAPTIONS  mkfile
	{cat _header
	#for (entry in `{ls -t *.^(png jpg jpeg gif) >[2]/dev/null | sed 20q}) {
	for (entry in  $TARG) {
		alt=''
		if (test -r $entry^.alt) {alt=`{cat $entry^.alt}}
		pubts=`{grep '	'$entry'$' _timestamps | awk '{print $1}'}
		modts=`{stat $entry}
		listing=`{ls -l $entry}
		echo -n	'<figure id="'
		echo -n	$entry
		echo		'"><a href="'$entry'">'
		echo -n	'	<img src="'$entry'" class="responsive-image" alt="'
		echo -n	$alt
		echo 	'"/>'
		echo 	'</a>'
		echo 	'<br/>'
		echo -n 	'<figcaption>'
		if (test -r $entry^.caption) {cat $entry^.caption; echo '<br/>'}
		echo -n	'<span class="byline">'
		echo -n 	$listing(4)
		echo -n 	' — '
		datefmt -t $modts '%F %T'
		if (! ~ $modts $pubts) {
			echo -n ' (orig: '
			datefmt -t $pubts '%F %T'
			echo -n ')'
		}
		echo		'</span>'
		echo 	'</figcaption></figure>'
		echo 	'<hr>'
	}
	cat _footer} > $target
	cp $target $target.html

# Atom feed.
index.atom:Q:	_atomhead _timestamps $TARG $ALTS $CAPTIONS mkfile
	now=`{datefmt %FT%T%:}
	{cat _atomhead | sed 's/UPDATED/'^$now^'/'
	echo '	<link href="'$BASEURL'/index.atom" rel="self" />'
	for (entry in $TARG) {
		alt=''
		caption=''
		if (test -r $entry^.alt) {alt=`{cat $entry.alt | htmlfmt -c utf-8 | sed 10q}}
		if (test -r $entry^.caption) {caption=`{cat $entry.caption | htmlfmt -c utf-8 | sed 10q}}
		pubts=`{grep '	'$entry'$' _timestamps | awk '{print $1}'}
		modts=`{stat $entry}
		mtype=`{file -m $entry}
		echo '	<entry>'
		echo '		<title>'$entry'</title>' | sed 's/␣/ /g'
		echo '		<link rel="enclosure" href="'$BASEURL'/#'$entry'"/>'
		echo '		<id>'$BASEURL'/#'$entry'</id>'
		echo -n '		<published>'
		datefmt -t $pubts %FT%T%:
		echo '</published>'
		echo -n '		<updated>'
		datefmt -t $modts %FT%T%:
		echo '</updated>'
		echo 	'		<content type="'$mtype'" src="'$BASEURL^/^$entry'"/>'
#		echo 	'		</content>'
#		echo 	'		<content type="text">'
#		echo -n	'			<img src="'$BASEURL^/^$entry'" alt="'
#		echo -n	$alt
#		echo 	'"/>'
#		echo 	'		</content>'
		echo -n '		<summary>'
		{
			if (! ~ $caption '')
				echo $caption
			if not if (! ~ $alt '')
				echo $alt
		}
		echo '</summary>'
		echo '	</entry>'
	}
	echo '</feed>'} > $target

# JSON Feed.
feed.json:Q:	_jsonhead _timestamps $TARG $ALTS $CAPTIONS mkfile
	#entries=`{sort -rn _timestamps | awk '{print $2}'}
	#nentries=$#entries
	nentries=$#TARG
	{cat _jsonhead
	echo '	"items":			['
	#for (entry in $entries) {
	for (entry in $TARG) {
		alt=''
		caption=''
		# XXX These need better escaping for json.
		if (test -r $entry^.alt) {alt=`{cat $entry.alt | htmlfmt -c utf-8 | sed 10q}}
		if (test -r $entry^.caption) {caption=`{cat $entry.caption | htmlfmt -c utf-8 | sed 10q}}
		pubts=`{grep '	'$entry'$' _timestamps | awk '{print $1}'}
		modts=`{stat $entry}
		echo '		{'
		echo '			"id":		"'$BASEURL'/index.html#'$entry'",'
		echo '			"url":		"'$BASEURL'/index.html#'$entry'"',
		echo '			"image":	"'$BASEURL'/'$entry'"',
		# Need to get escaping right before including $entry.caption or $entry.alt here.
		echo -n '			"content_text":	"'
		{
			if (! ~ $caption '')
				echo -n $caption
			if not if (! ~ $alt '')
				echo -n $alt
		}
		echo '",'
		echo -n '			"date_published":	'
		datefmt -t $pubts '"%FT%T%:",%n'
		echo -n '			"date_modified":	'
		datefmt -t $modts '"%FT%T%:"%n'
		echo -n '		}'
		if (! ~ $entry $TARG($nentries))
			echo ','
		if not
			echo ''
	}
	echo '	]'
	echo '}' } > $target

# Some defaults for the first run.
_header:Q:
	echo -n	'Making a default header... '
	{echo	'<!DOCTYPE html>'
	echo		'<html lang="en">'
	echo		'<head>'
	echo		'	<title>mkImg — image stream</title>'
	echo		'	<link rel="stylesheet" type="text/css" href="img.css">'
	echo		'	<link rel="alternate" type="application/application/feed+json" href="feed.json" />'
	echo		'	<link rel="alternate" type="application/atom+xml" href="index.atom" />'
	echo		'</head>'
	echo		'<body>'
	echo		'<div class="wrapper">'
	echo		'<!--End header-->'} > $target
	echo 'done. Edit _header to customize it.'
_footer:Q:
	echo -n	'Making a default footer... '
	{echo		'<!--Begin footer-->'
	echo		'<div class="push"></div>'
	echo		'</div>'
	echo		'<div class="footer">'
	echo		'This is <a href="http://a.9srv.net/img/_readme.html">mkImg</a>.<br/>'
	echo		'Inspired by the version at'
	echo		'<a href="https://img.texto-plano.xyz">Texto-Plano</a>.<br/>'
	echo		'Comments? <a href="PUT_SOME_CONTACT_ADDRESS_HERE">Tell me about it</a>.'
	echo		'— Back to the <a href="index.html">index</a>.'
	echo		'</div>'
	echo		'</body>'
	echo		'</html>'} >_footer
	echo 'done. Edit _footer to customize it.'
_jsonhead:Q:
	echo -n	'Making a default header for the JSON feed... '
	{echo		'{'
	echo		'	"version":			"https://jsonfeed.org/version/1.1",'
	echo		'	"title":			"mkImg — Image stream",'
	echo		'	"home_page_url":	"'$BASEURL'",'
	echo		'	"feed_url":		"'$BASEURL'/feed.json",'
	echo		'	"authors":	['
	echo		'		{'
	echo		'			"name":	"PUT_YOUR_NAME_HERE",'
	echo		'			"url":		"PUT_YOUR_HOME_PAGE_URL_HERE"'
	echo		'		}'
	echo		'	],'} >_jsonhead
	echo 'done. Edit _jsonhead to customize it.'
_atomhead:Q:
	echo -n	'Making a default header for the Atom feed... '
	{echo		'<?xml version="1.0" encoding="utf-8"?>'
	echo		'<feed xmlns="http://www.w3.org/2005/Atom">'
	echo		'	<title>mkImg — Image stream</title>'
	echo		'	<link href="'$BASEURL'"/>'
	echo		'	<updated>UPDATED</updated>'
	echo		'	<author>'
	echo		'		<name>PUT_YOUR_NAME_HERE</name>'
	echo		'	</author>'
	echo		'	<id>PUT_YOUR_URL_HERE</id>'} >_atomhead
	echo 'done. Edit _atomhead to customize it.'