/**
*
* @return Advanced_Ads_Select
*/
public static function get_instance()
{
if (!isset(self::$instance)) {
self::$instance = new self();
}
return self::$instance;
}
/**
* Simple wp ajax interface for ad selection.
*
* Provides a single ad given ID and selection method.
*/
public function advads_ajax_ad_select()
{
// set proper header
header('Content-Type: application/json; charset: utf-8');
// allow modules / add ons to test (this is rather late but should happen before anything important is called)
do_action('advanced-ads-ajax-ad-select-init');
// init handlers
$selector = Advanced_Ads_Select::get_instance();
$methods = $selector->get_methods();
$method = isset($_REQUEST['ad_method']) ? (string) $_REQUEST['ad_method'] : null;
$id = isset($_REQUEST['ad_id']) ? (string) $_REQUEST['ad_id'] : null;
$arguments = isset($_REQUEST['ad_args']) ? $_REQUEST['ad_args'] : array();
if (is_string($arguments)) {
$arguments = stripslashes($arguments);
$arguments = json_decode($arguments, true);
}
$adIds = isset($_REQUEST['ad_ids']) ? $_REQUEST['ad_ids'] : null;
if (is_string($adIds)) {
$adIds = json_decode($adIds, true);
}
$response = array();
if (isset($methods[$method]) && isset($id)) {
$advads = Advanced_Ads::get_instance();
if (is_array($adIds)) {
// ads loaded previously and passed by query
$advads->current_ads += $adIds;
}
$l = count($advads->current_ads);
// build content
$content = $selector->get_ad_by_method($id, $method, $arguments);
$adIds = array_slice($advads->current_ads, $l);
// ads loaded by this request
$response = array('status' => 'success', 'item' => $content, 'id' => $id, 'method' => $method, 'ads' => $adIds);
} else {
// report error
$response = array('status' => 'error', 'message' => 'No valid ID or METHOD found.');
}
echo json_encode($response);
die;
}
/**
* inject ads directly into the content
*
* @since 1.2.1
* @param string $placement_id id of the placement
* @param arr $options placement options
* @param string $content
* @return type
* @link inspired by http://www.wpbeginner.com/wp-tutorials/how-to-insert-ads-within-your-post-content-in-wordpress/
*/
public static function &inject_in_content($placement_id, $options, &$content)
{
/*
* hot-fixed to support some tags under idealised conditions.
* this does ignore:
* - autop() messups
* - nesting of any kind
* - non-valid XHTML (i.e. wild HTML)
*
* 'after' is experimental as the concept requires DOM and is not fully deterministic across implementations.
* it falls back to 'before' n+1-th element or 'after' closing tag of the n-th.
*/
$tag = isset($options['tag']) ? $options['tag'] : 'p';
$position = isset($options['position']) ? $options['position'] : 'after';
$paragraph_id = isset($options['index']) ? $options['index'] : 1;
$offset = 0;
$insertAt = null;
// sanitise
$tag = preg_quote(strtolower($tag), '`');
$before = $position !== 'after';
$paragraph_id = max(1, (int) $paragraph_id);
// detect n-th tag
$matches = array();
while (1 === preg_match("`<{$tag}(?=[ >/])(?:[^>]+/>|.+?(?:</{$tag}\\s*>|(?=<{$tag}(?=[ >/])|\$)))`Ssi", $content, $matches, PREG_OFFSET_CAPTURE, $offset)) {
$offset = $matches[0][1];
// skip empty
// -TODO should only ignore whitespaces, not all special chars
if ('' === preg_replace('/&[a-z0-9#]+;|\\s+/i', '', strip_tags(htmlspecialchars($matches[0][0])))) {
continue;
}
$paragraph_id--;
if ($paragraph_id <= 0) {
$insertAt = $before ? $offset : $offset + strlen($matches[0][0]);
break;
}
// start at next offset
$offset += strlen($matches[0][0]);
}
if (isset($insertAt)) {
$ad_content = Advanced_Ads_Select::get_instance()->get_ad_by_method($placement_id, 'placement', $options);
if ($insertAt === false) {
$content .= $ad_content;
// fallback: end-of-content
} else {
$content = substr($content, 0, $insertAt) . $ad_content . substr($content, $insertAt);
}
return $content;
}
return $content;
}
/**
* injected ad into content (before and after)
* displays ALL ads
*
* @since 1.1.0
* @param str $content post content
*/
public function inject_content($content = '')
{
// run only within the loop on single pages of public post types
$public_post_types = get_post_types(array('public' => true, 'publicly_queryable' => true), 'names', 'or');
// check if admin allows injection in all places
$options = $this->plugin->options();
if (!isset($options['content-injection-everywhere'])) {
// check if this is a singular page within the loop
if (!is_singular($public_post_types) || !in_the_loop()) {
return $content;
}
}
$placements = get_option('advads-ads-placements', array());
if (!apply_filters('advanced-ads-can-inject-into-content', true, $content, $placements)) {
return $content;
}
foreach ($placements as $_placement_id => $_placement) {
if (empty($_placement['item']) || !isset($_placement['type'])) {
continue;
}
$_options = isset($_placement['options']) ? $_placement['options'] : array();
switch ($_placement['type']) {
case 'post_top':
// TODO broken: does not serve placement but serves ad directly
$content = Advanced_Ads_Select::get_instance()->get_ad_by_method($_placement_id, Advanced_Ads_Select::PLACEMENT, $_options) . $content;
break;
case 'post_bottom':
$content .= Advanced_Ads_Select::get_instance()->get_ad_by_method($_placement_id, Advanced_Ads_Select::PLACEMENT, $_options);
break;
case 'post_content':
$content = Advanced_Ads_Placements::inject_in_content($_placement_id, $_options, $content);
break;
}
}
return $content;
}
/**
* inject ads directly into the content
*
* @since 1.2.1
* @param string $placement_id id of the placement
* @param arr $options placement options
* @param string $content
* @return type
* @link inspired by http://www.wpbeginner.com/wp-tutorials/how-to-insert-ads-within-your-post-content-in-wordpress/
*/
public static function &inject_in_content($placement_id, $options, &$content)
{
// test ad is emtpy
$whitespaces = json_decode('"\\t\\n\\r \\u00A0"');
$adContent = Advanced_Ads_Select::get_instance()->get_ad_by_method($placement_id, 'placement', $options);
if (trim($adContent, $whitespaces) === '') {
return $content;
}
// parse document as DOM (fragment - having only a part of an actual post given)
// -TODO may want to verify the wpcharset is supported by server (mb_list_encodings)
// prevent messages from dom parser
$wpCharset = get_bloginfo('charset');
// check if mbstring exists
if (!function_exists('mb_convert_encoding')) {
if ($wpCharset === "UTF-8") {
$content = htmlspecialchars_decode(htmlentities($content, ENT_COMPAT, $wpCharset, false));
} else {
return $content;
}
} else {
$content = mb_convert_encoding($content, 'HTML-ENTITIES', $wpCharset);
}
// check which priority the wpautop filter has; might have been disabled on purpose
$wpautop_priority = has_filter('the_content', 'wpautop');
if ($wpautop_priority && Advanced_Ads_Plugin::get_instance()->get_content_injection_priority() < $wpautop_priority) {
$content = wpautop($content);
}
$dom = new DOMDocument('1.0', $wpCharset);
// may loose some fragments or add autop-like code
libxml_use_internal_errors(true);
// avoid notices and warnings - html is most likely malformed
$success = $dom->loadHtml('<!DOCTYPE html><html><meta http-equiv="Content-Type" content="text/html; charset=' . $wpCharset . '" /><body>' . $content);
libxml_use_internal_errors(false);
if ($success !== true) {
// -TODO handle cases were dom-parsing failed (at least inform user)
return $content;
}
// parse arguments
$tag = isset($options['tag']) ? $options['tag'] : 'p';
$tag = preg_replace('/[^a-z0-9]/i', '', $tag);
// simplify tag
// only has before and after
$before = isset($options['position']) && $options['position'] === 'before';
$paragraph_id = isset($options['index']) ? $options['index'] : 1;
$paragraph_id = max(1, (int) $paragraph_id);
$paragraph_select_from_bottom = isset($options['start_from_bottom']) && $options['start_from_bottom'];
// select positions
$xpath = new DOMXPath($dom);
$items = $xpath->query('/html/body/' . $tag);
$offset = null;
$options = array('allowEmpty' => false);
// if there are too few items at this level test nesting
$options['itemLimit'] = $tag === 'p' ? 2 : 1;
// allow hooks to change some options
$options = apply_filters('advanced-ads-placement-content-injection-options', $options, $tag);
if ($items->length < $options['itemLimit']) {
$items = $xpath->query('/html/body/*/' . $tag);
}
// try third level as last resort
if ($items->length < $options['itemLimit']) {
$items = $xpath->query('/html/body/*/*/' . $tag);
}
// allow to select other elements
$items = apply_filters('advanced-ads-placement-content-injection-items', $items, $xpath, $tag);
// filter empty tags from items
$paragraphs = array();
foreach ($items as $item) {
if ($options['allowEmpty'] || isset($item->textContent) && trim($item->textContent, $whitespaces) !== '') {
$paragraphs[] = $item;
}
}
$paragraph_count = count($paragraphs);
if ($paragraph_count >= $paragraph_id) {
$offset = $paragraph_select_from_bottom ? $paragraph_count - $paragraph_id : $paragraph_id - 1;
// convert HTML to XML!
$adDom = new DOMDocument('1.0', $wpCharset);
libxml_use_internal_errors(true);
$adDom->loadHtml('<!DOCTYPE html><html><meta http-equiv="Content-Type" content="text/html; charset=' . $wpCharset . '" /><body>' . $adContent);
$adNode = $adDom->lastChild->lastChild;
// >html>body
libxml_use_internal_errors(false);
$adContent = $adDom->saveXML($adNode);
$adContent = substr($adContent, 6, -7);
$adNode = $dom->createDocumentFragment();
$adNode->appendXML($adContent);
// inject
$node = apply_filters('advanced-ads-placement-content-injection-node', $paragraphs[$offset], $tag, $before);
if ($before) {
$refNode = $node;
$items = $xpath->query('/html/body/' . $tag);
$refNode->parentNode->insertBefore($adNode, $refNode);
} else {
// append before next node or as last child to body
$refNode = $node->nextSibling;
if (isset($refNode)) {
$refNode->parentNode->insertBefore($adNode, $refNode);
} else {
// append to body; -TODO using here that we only select direct children of the body tag
$paragraphs[$offset]->parentNode->appendChild($adNode);
}
}
}
// convert to text-representation
$content = $dom->saveHTML();
// remove head and tail (required for dom parser but unwanted for content)
$content = substr($content, stripos($content, '<body>') + 6);
$content = str_replace(array('</body>', '</html>'), '', $content);
// no fall-back desired: if there are too few paragraphs do nothing
// fix shortcode quotes (malformed by backend editor)
$matches = array();
if (0 < preg_match_all('/\\[[^]]+\\]/Siu', $content, $matches, PREG_OFFSET_CAPTURE) && isset($matches[0])) {
foreach ($matches[0] as $match) {
$offset = $match[1];
$content = substr($content, 0, $offset) . str_replace(array('“', '″', '“', '"e;', '″'), '"', $match[0]) . substr($content, $offset + strlen($match[0]));
}
}
return $content;
}
/**
* control the output of the group by type and amount of ads
*
* @since 1.4.8
* @return str $output output of ad(s) by ad
*/
public function output()
{
if (!$this->id) {
return;
}
// load ads
$ads = $this->load_all_ads();
if ($ads === array()) {
return;
}
// get ad weights serving as an order here
$weights = $this->get_ad_weights();
asort($weights);
// if ads and weights don’t have the same keys, update weights array
if (count($weights) == 0 && count($ads) > 0 || count($weights) != count($ads) || array_diff_key($weights, $ads) != array() || array_diff_key($ads, $weights) != array()) {
$this->update_ad_weights();
$weights = $this->ad_weights;
}
// remove ads with 0 ad weight
foreach ($weights as $_ad_id => $_ad_weight) {
if ($_ad_weight === 0) {
unset($weights[$_ad_id]);
}
}
// order ads based on group type
switch ($this->type) {
case 'ordered':
// order to highest weight first
arsort($weights);
$ordered_ad_ids = array_keys($weights);
break;
default:
// default
$ordered_ad_ids = $this->shuffle_ads($ads, $weights);
}
$ordered_ad_ids = apply_filters('advanced-ads-group-output-ad-ids', $ordered_ad_ids, $this->type, $ads, $weights);
// load the ad output
$output = array();
$ads_displayed = 0;
$ad_count = apply_filters('advanced-ads-group-ad-count', $this->ad_count, $this);
$ad_select = Advanced_Ads_Select::get_instance();
foreach ($ordered_ad_ids as $_ad_id) {
// load the ad object
$ad = $ad_select->get_ad_by_method($_ad_id, Advanced_Ads_Select::AD, $this->ad_args);
if ($ad !== null) {
$output[] = $ad;
$ads_displayed++;
// break the loop when maximum ads are reached
if ($ads_displayed === $ad_count) {
break;
}
}
}
// add the group to the global output array
$advads = Advanced_Ads::get_instance();
$advads->current_ads[] = array('type' => 'group', 'id' => $this->id, 'title' => $this->name);
// filter grouped ads output
$output_string = implode('', apply_filters('advanced-ads-group-output-array', $output, $this));
// filter final group output
return apply_filters('advanced-ads-group-output', $output_string, $this);
}
/**
* return content of an ad placement
*
* @since 1.1.0
* @param string $id slug of the ad placement
*
*/
function get_ad_placement($id = '')
{
return Advanced_Ads_Select::get_instance()->get_ad_by_method($id, 'placement');
}
/**
* control the output of the group by type and amount of ads
*
* @since 1.4.8
* @param array/null ordered_ad_ids ordered ids of the ads that belong to the group
* @return str $output output of ad(s) by ad
*/
public function output($ordered_ad_ids = false)
{
// if $ordered_ad_ids was not passed to the function, load it
$ordered_ad_ids = $ordered_ad_ids === false ? $this->get_ordered_ad_ids() : $ordered_ad_ids;
if ($ordered_ad_ids === null) {
return;
}
// load the ad output
$output = array();
$ads_displayed = 0;
$ad_count = apply_filters('advanced-ads-group-ad-count', $this->ad_count, $this);
$ad_select = Advanced_Ads_Select::get_instance();
foreach ($ordered_ad_ids as $_ad_id) {
// load the ad object
$ad = $ad_select->get_ad_by_method($_ad_id, Advanced_Ads_Select::AD, $this->ad_args);
if ($ad !== null) {
$output[] = $ad;
$ads_displayed++;
// break the loop when maximum ads are reached
if ($ads_displayed === $ad_count) {
break;
}
}
}
// add the group to the global output array
$advads = Advanced_Ads::get_instance();
$advads->current_ads[] = array('type' => 'group', 'id' => $this->id, 'title' => $this->name);
// filter grouped ads output
$output_string = implode('', apply_filters('advanced-ads-group-output-array', $output, $this));
// filter final group output
return apply_filters('advanced-ads-group-output', $output_string, $this);
}
