/**
* Calculate the page analysis results for post.
*
* @todo [JRF => whomever] check whether the results of this method are always checked with is_wp_error()
* @todo [JRF => whomever] check the usage of this method as it's quite intense/heavy, see if it's only
* used when really necessary
* @todo [JRF => whomever] see if we can get rid of the passing by reference of $results as it makes
* the code obfuscated
*
* @param object $post Post to calculate the results for.
*
* @return array|WP_Error
*/
function calculate_results($post)
{
$options = WPSEO_Options::get_all();
if (!class_exists('DOMDocument')) {
$result = new WP_Error('no-domdocument', sprintf(__("Your hosting environment does not support PHP's %sDocument Object Model%s.", 'wordpress-seo'), '<a href="http://php.net/manual/en/book.dom.php">', '</a>') . ' ' . __("To enjoy all the benefits of the page analysis feature, you'll need to (get your host to) install it.", 'wordpress-seo'));
return $result;
}
if (!is_array($post) && !is_object($post)) {
$result = new WP_Error('no-post', __('No post content to analyse.', 'wordpress-seo'));
return $result;
} elseif (self::get_value('focuskw', $post->ID) === '') {
$result = new WP_Error('no-focuskw', sprintf(__('No focus keyword was set for this %s. If you do not set a focus keyword, no score can be calculated.', 'wordpress-seo'), $post->post_type));
self::set_value('linkdex', 0, $post->ID);
return $result;
} elseif (apply_filters('wpseo_use_page_analysis', true) !== true) {
$result = new WP_Error('page-analysis-disabled', sprintf(__('Page Analysis has been disabled.', 'wordpress-seo'), $post->post_type));
return $result;
}
$results = array();
$job = array();
$sampleurl = $this->get_sample_permalink($post);
$job['pageUrl'] = preg_replace('`%(?:post|page)name%`', $sampleurl[1], $sampleurl[0]);
$job['pageSlug'] = urldecode($post->post_name);
$job['keyword'] = self::get_value('focuskw');
$job['keyword_folded'] = $this->strip_separators_and_fold($job['keyword']);
$job['post_id'] = $post->ID;
$job['post_type'] = $post->post_type;
$dom = new domDocument();
$dom->strictErrorChecking = false;
$dom->preserveWhiteSpace = false;
/**
* Filter: 'wpseo_pre_analysis_post_content' - Make the post content filterable before calculating the page analysis
*
* @api string $post_content The post content
*
* @param object $post The post
*/
$post_content = apply_filters('wpseo_pre_analysis_post_content', $post->post_content, $post);
// Check if the post content is not empty
if (!empty($post_content)) {
@$dom->loadHTML($post_content);
}
unset($post_content);
$xpath = new DOMXPath($dom);
// Check if this focus keyword has been used already.
$this->check_double_focus_keyword($job, $results);
// Keyword
$this->score_keyword($job['keyword'], $results);
// Title
$title = self::get_value('title');
if ($title !== '') {
$job['title'] = $title;
} else {
if (isset($options['title-' . $post->post_type]) && $options['title-' . $post->post_type] !== '') {
$title_template = $options['title-' . $post->post_type];
} else {
$title_template = '%%title%% - %%sitename%%';
}
$job['title'] = wpseo_replace_vars($title_template, $post);
}
unset($title);
$this->score_title($job, $results);
// Meta description
$description = '';
$desc_meta = self::get_value('metadesc');
if ($desc_meta !== '') {
$description = $desc_meta;
} elseif (isset($options['metadesc-' . $post->post_type]) && $options['metadesc-' . $post->post_type] !== '') {
$description = wpseo_replace_vars($options['metadesc-' . $post->post_type], $post);
}
unset($desc_meta);
self::$meta_length = apply_filters('wpseo_metadesc_length', self::$meta_length, $post);
$this->score_description($job, $results, $description, self::$meta_length);
unset($description);
// Body
$body = $this->get_body($post);
$firstp = $this->get_first_paragraph($body);
$this->score_body($job, $results, $body, $firstp);
unset($firstp);
// URL
$this->score_url($job, $results);
// Headings
$headings = $this->get_headings($body);
$this->score_headings($job, $results, $headings);
unset($headings);
// Images
$imgs = array();
$imgs['count'] = substr_count($body, '<img');
$imgs = $this->get_images_alt_text($post->ID, $body, $imgs);
// Check featured image
if (function_exists('has_post_thumbnail') && has_post_thumbnail()) {
$imgs['count'] += 1;
if (empty($imgs['alts'])) {
$imgs['alts'] = array();
}
$imgs['alts'][] = $this->strtolower_utf8(get_post_meta(get_post_thumbnail_id($post->ID), '_wp_attachment_image_alt', true));
}
$this->score_images_alt_text($job, $results, $imgs);
unset($imgs);
unset($body);
// Anchors
$anchors = $this->get_anchor_texts($xpath);
$count = $this->get_anchor_count($xpath);
$this->score_anchor_texts($job, $results, $anchors, $count);
unset($anchors, $count, $dom);
$results = apply_filters('wpseo_linkdex_results', $results, $job, $post);
$this->aasort($results, 'val');
$overall = 0;
$overall_max = 0;
foreach ($results as $result) {
$overall += $result['val'];
$overall_max += 9;
}
if ($overall < 1) {
$overall = 1;
}
$score = wpseo_calc(wpseo_calc($overall, '/', $overall_max), '*', 100, true);
if (!is_wp_error($score)) {
self::set_value('linkdex', absint($score), $post->ID);
$results['total'] = $score;
}
return $results;
}
