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<?php
define('OEMBED_AUTOEMBED', 1);
define('OEMBED_AUTOEMBED_UNWRAP', 2);
define('OEMBED_AUTOEMBED_DISABLED', 0);
define('OEMBED_PATTERN_AUTOEMBED', '|^\\s*(https?://[^\\s"]+)\\s*$|im');
define('OEMBED_PATTERN_AUTOEMBED_UNWRAP', serialize(array(
OEMBED_PATTERN_AUTOEMBED,
'|<[a-z0-9]*[^>]*?>(https?://[^\\s"]+?)</[a-z0-9]*>|i',
'|<span[^>]*?>(https?://[^\\s"]+?)</span>|i',
'|<a[^>]*?>(https?://[^\\s"]+?)</a>|i',
'|^(https?:\\/\\/[^\\s"]+?)\\s|i',
'|\\s(https?:\\/\\/[^\\s"]+?)$|i',
'|\\s(https?:\\/\\/[^\\s"]+?)\\s|i',
'|^(https?:\\/\\/[^\\s"]+?)$|i',
)));
define('OEMBED_PATTERN_EMBED_SHORTCODE', '/(.?)\\[embed\\b(.*?)\\](.+?)\\[\\/embed\\](.?)/s');
define('OEMBED_PATTERN_EMBED_UNWRAP', '/<p>\\s*+(\\[embed\\b.*?\\].+?\\[\\/embed\\])\\s*+<\\/p>/s');
function oembed_filter_info() {
$filters = array();
$filters['oembed'] = array(
'title' => t('oEmbed filter'),
'description' => t('Embeds content for oEmbed-enabled web addresses and turns the rest, and e-mail addresses, into clickable links.'),
'prepare callback' => 'oembed_filter_oembed_prepare',
'process callback' => 'oembed_filter_oembed_process',
'settings callback' => 'oembed_filter_oembed_settings',
'tips callback' => 'oembed_filter_oembed_tips',
'default settings' => array(
'options' => '',
'autoembed' => OEMBED_AUTOEMBED,
),
);
$filters['oembed_legacy'] = array(
'title' => t('oEmbed legacy filter'),
'description' => t('Embeds content for oEmbed-enabled web addresses and turns the rest, and e-mail addresses, into clickable links.'),
'process callback' => 'oembed_filter_oembed_legacy_process',
'settings callback' => 'oembed_filter_oembed_legacy_settings',
'default settings' => array(
'maxwidth' => '',
'maxheight' => '',
),
);
return $filters;
}
function oembed_filter_oembed_legacy_settings($form, &$form_state, $filter, $format, $defaults, $filters) {
module_load_include('inc', 'oembed', 'oembed_legacy');
return _oembed_filter_settings($form, $form_state, $filter, $format, $defaults);
}
function oembed_filter_oembed_legacy_process($text, $filter, $format, $langcode, $cache, $cache_id) {
module_load_include('inc', 'oembed', 'oembed_legacy');
return _oembed_filter_apply($text, $filter, $format, $langcode, $cache, $cache_id);
}
function oembed_filter_oembed_settings($form, &$form_state, $filter, $format, $defaults, $filters) {
$filter->settings += $defaults;
$settings = array();
$settings['options'] = array(
'#type' => 'textfield',
'#title' => t('Default oEmbed request options'),
'#default_value' => $filter->settings['options'],
'#description' => t('A series of attribute value pairs for the default request options. For example, <em>maxwidth="500"</em>.'),
);
$settings['autoembed'] = array(
'#type' => 'radios',
'#title' => t('Automatically embed URLs'),
'#default_value' => $filter->settings['autoembed'],
'#options' => array(
OEMBED_AUTOEMBED => t('Embed URL that are on its own line.'),
OEMBED_AUTOEMBED_UNWRAP => t('Embed URL on its own line ignoring any <p> tags that may have been inserted by a WYSIWYG editor.'),
OEMBED_AUTOEMBED_DISABLED => t('Disabled'),
),
'#description' => t('When possible, embed the media content from a URL directly in the input.'),
);
return $settings;
}
function oembed_filter_oembed_prepare($text, $filter, $format, $langcode, $cache, $cache_id) {
if (OEMBED_AUTOEMBED == $filter->settings['autoembed']) {
$text = preg_replace_callback(OEMBED_PATTERN_AUTOEMBED, 'oembed_preg_auto_replace', $text);
}
elseif (OEMBED_AUTOEMBED_UNWRAP == $filter->settings['autoembed']) {
$text = preg_replace_callback(unserialize(OEMBED_PATTERN_AUTOEMBED_UNWRAP), 'oembed_preg_auto_replace', $text);
}
return $text;
}
function oembed_filter_oembed_process($text, $filter, $format, $langcode, $cache, $cache_id) {
global $_oembed_filter_settings;
$_oembed_filter_settings = !empty($filter->settings['options']) ? oembed_parse_attr($filter->settings['options']) : array();
$text = preg_replace(OEMBED_PATTERN_EMBED_UNWRAP, '$1 ', $text);
$text = preg_replace_callback(OEMBED_PATTERN_EMBED_SHORTCODE, 'oembed_preg_tag_replace', $text);
unset($_oembed_filter_settings);
return $text;
}
function oembed_filter_oembed_tips($filter, $format, $long) {
if ($long) {
return t('Embed content by wrapping a supported URL in [embed] … [/embed]. Set options such as width and height with attributes [embed width="123" height="456"] … [/embed]. Unsupported options will be ignored.');
}
else {
return t('Embed content by wrapping a supported URL in [embed] … [/embed].');
}
}
function oembed_preg_tag_replace($match) {
global $_oembed_filter_settings;
if ($match[1] === '[' && $match[4] === ']') {
return substr($match[0], 1, -1);
}
$url = $match[3];
$shortcode_options = !empty($match[2]) ? oembed_parse_attr($match[2]) : array();
$options = array_merge($_oembed_filter_settings, $shortcode_options);
$callback = variable_get('oembed_resolve_link_callback', 'oembed_resolve_link');
if (!function_exists($callback)) {
$callback = 'oembed_resolve_link';
}
return $match[1] . $callback($url, $options) . $match[4];
}
function oembed_preg_auto_replace($match) {
return '[embed]' . $match[1] . "[/embed] ";
}
function oembed_resolve_link($url, $options = array()) {
$url = decode_entities($url);
$element = array();
$matches = array();
if ($provider = oembed_get_provider($url, $matches)) {
$embed = oembed_get_data($url);
if ($embed) {
$element = oembed_render_element('oembed', $url, $options);
}
}
$return = drupal_render($element);
if (empty($return)) {
$return = $url;
}
return $return;
}
function oembed_parse_attr($text) {
$attributes = array();
$pattern = '/(\\w+)\\s*=\\s*"([^"]*)"(?:\\s|$)|(\\w+)\\s*=\\s*\'([^\']*)\'(?:\\s|$)|(\\w+)\\s*=\\s*([^\\s\'"]+)(?:\\s|$)|"([^"]*)"(?:\\s|$)|(\\S+)(?:\\s|$)/';
$text = preg_replace("/[\\x{00a0}\\x{200b}]+/u", " ", $text);
if (preg_match_all($pattern, $text, $matches, PREG_SET_ORDER)) {
foreach ($matches as $match) {
if (!empty($match[1])) {
$attributes[strtolower($match[1])] = stripcslashes($match[2]);
}
elseif (!empty($match[3])) {
$attributes[strtolower($match[3])] = stripcslashes($match[4]);
}
elseif (!empty($match[5])) {
$attributes[strtolower($match[5])] = stripcslashes($match[6]);
}
elseif (isset($match[7]) and strlen($match[7])) {
$attributes[] = stripcslashes($match[7]);
}
elseif (isset($match[8])) {
$attributes[] = stripcslashes($match[8]);
}
}
}
else {
$attributes = ltrim($text);
}
return $attributes;
}
function _oembed_field_extract_urls($entity_type, $entity) {
$urls = array();
$filter_settings = array();
foreach (filter_formats() as $format) {
$filters = filter_list_format($format->format);
if (isset($filters['oembed']) && $filters['oembed']->status) {
$filter_settings[$format->format] = $filters['oembed']->settings;
}
}
if (!empty($filter_settings)) {
list(, , $bundle) = entity_extract_ids($entity_type, $entity);
$instances = field_info_instances($entity_type, $bundle);
foreach ($instances as $info) {
if (isset($info['settings']['text_processing']) && $info['settings']['text_processing']) {
$items = field_get_items($entity_type, $entity, $info['field_name']);
if (!$items) {
continue;
}
foreach ($items as $delta => $item) {
if (isset($filter_settings[$item['format']])) {
foreach (array(
'value',
'summary',
) as $column) {
if (!empty($item[$column])) {
$text = $item[$column];
if (OEMBED_AUTOEMBED == $filter_settings[$item['format']]['autoembed']) {
$text = preg_replace_callback(OEMBED_PATTERN_AUTOEMBED, 'oembed_preg_auto_replace', $text);
}
elseif (OEMBED_AUTOEMBED_UNWRAP == $filter_settings[$item['format']]['autoembed']) {
$text = preg_replace_callback(unserialize(OEMBED_PATTERN_AUTOEMBED_UNWRAP), 'oembed_preg_auto_replace', $text);
}
$matches = array();
preg_match_all(OEMBED_PATTERN_EMBED_SHORTCODE, $text, $matches);
$urls[$info['field_name']][$delta][$column] = array_filter($matches[3], '_oembed_field_filter_urls');
}
}
}
}
}
}
}
return $urls;
}
function _oembed_field_filter_urls($match) {
$matches = array();
if (oembed_get_provider($match, $matches)) {
return TRUE;
}
return FALSE;
}
function oembed_field_attach_validate($entity_type, $entity, array &$errors) {
foreach (_oembed_field_extract_urls($entity_type, $entity) as $field_name => $items) {
foreach ($items as $delta => $item) {
foreach ($item as $column => $urls) {
$messages = array();
foreach ($urls as $url) {
$embed = oembed_get_data($url);
$validation_errors = oembed_validate_response($embed);
if (!empty($validation_errors)) {
$message = t('!url could not be embedded.', array(
'!url' => l(_filter_url_trim($url, 50), $url),
));
$message .= theme('item_list', array(
'items' => $validation_errors,
));
$messages[] = $message;
}
}
if (!empty($messages)) {
$errors[$field_name][$entity->language][$delta][] = array(
'error' => 'oembed_' . $column,
'message' => theme('item_list', array(
'items' => $messages,
)),
'repeat' => TRUE,
);
}
}
}
}
}