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<?php
/**
* Parse $html_filename and add an entry of the type
* "$html_filename" => ("img1.png", "img2.png") for each
* encountered 'img' tag having the 'src' attribute formatted
* as "/essay/<article_slug>/data/img1.png", to the JSON which
* associates any article with its images
*/
function add_article($html_filename){
$doc = new DOMDocument();
$doc->loadHTMLFile($html_filename);
$xpath = new DOMXPath($doc);
$xpath->registerNamespace('php', 'http://php.net/xpath');
$xpath->registerPhpFunctions('preg_match');
$elements = $xpath->query('//img[php:functionString("preg_match", "@^/essay/[^/]+/data/[^/]+@", @src) > 0]');
/*
1 open final JSON in "append mode"
2 append current file's entries
*/
$db_filename = "articles_images.json";
$json_str;
if (file_exists($db_filename))
$json_str = file_get_contents($db_filename);
else
$json_str = "";
$json_db = json_decode($json_str);
$json_db->$html_filename = array();
foreach($elements as $img){
$value = $img->getAttributeNode("src")->value;
array_push($json_db->$html_filename, basename($value));
}
file_put_contents($db_filename, json_encode($json_db));
}
/* suppress warnings due to parsing HTML5 */
libxml_use_internal_errors(true);
/* main: manually call add_article() for each article */
add_article("scrap1_10.html");
add_article("scrap1_11.html");
?>
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