A search utility for unzipped epubs

book-search.php

<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<style>
#view { float: right; width: 75vw; height: 98vh; }
nav { float: left; width: 20vw; height: 98vh; }
#nav { height: 100%; max-height: 90vh; overflow-y: scroll; }
.active { font-weight: bold; }
</style>
<title>Book search</title>
<iframe name=bob id=view src=blank.html></iframe>
<nav>
<form method=get>
	<input name=search value="<?=$_GET['search']?>" />
	<button type=submit>Search</button>
	<input label="words" type=checkbox name=only <?=array_key_exists('only',$_GET)?'checked=true':''?> />
</form>
<div id=nav>
<?php

function find_files($path, $type = 'html')
{
	$paths = [];
	if (is_file(__DIR__.'/'.$path))
	{
		$paths[] = [
			'name' => basename($path, '.'.$type),
			'path' => __DIR__.'/'.$path,
			'link' => './'.$path
		];
	}
	else foreach (glob(__DIR__.'/'.$path.'/'.'*') as $file)
	{
		$paths[] = [
			'name' => basename($file, '.'.$type),
			'path' => $file,
			'link' => str_replace(__DIR__, '.', $file)
		];
	}
	return $paths;
}

function search($paths, $term = "", $type = 'html')
{
	$matches = [];
	foreach ($paths as $p)
	{
		$text = file_get_contents($p['path']);
		if (array_key_exists('only', $_GET))
		{
			if(preg_match("/\b{$term}\b/", $text) === 1)
				$matches[] = [ $p['link'], $p['name'] ];
		}
		elseif (stripos($text, $term) !== false)
			$matches[] = [ $p['link'], $p['name'] ];
	}
	return $matches;
}

$file = file_get_contents("./stories.json");
$books = json_decode($file, true);

foreach ($books["books"] as $book)
{
	if(array_key_exists('tag', $_GET))
	{
		if (!in_array($_GET['tag'], $book['tags']))
			continue;
	}
	$name = $book["title"];
	$files = find_files($book["path"]);
	$results = search($files, $_GET['search']);
	if (count($results) == 0)
		continue;
	print "<h5>{$name}</h5>";
	foreach ($results as $link)
		print "<a target=bob href=\"{$link[0]}\">{$link[1]}</a><br>";
}
?>
</div>
</nav>
<script>
$(function () {
 $('a').click( function () {
   $(this).addClass('active').siblings().removeClass('active');
 });
});
</script>

stories.json

{
	"books": [
		{
			"title": "Book title",
			"path": "path/to/OEBPS/Text",
			"tags": [ "some", "keyword", "tags" ]
		},
		{
			"title": "sequel",
			"path": "path/for/OEBPS/Text",
			"tags": [ "other", "keyword", "tags" ]
		}
	],
	"exclude": [
		"bibliography.html",
		"copywrite.html",
		"cover.html",
		"dedication.html",
		"title.html",
		"title.xml",
		"postscript.html"
	]
}