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- <?php
- interface DrupalMetaTagInterface {
- /**
- * Constructor
- *
- * @param array $info
- * The information about the meta tag from metatag_get_info().
- */
- function __construct(array $info, array $data = array());
- function getForm();
- //function validateForm();
- //function processForm();
- function getValue();
- function getWeight();
- function getElement();
- function tidyValue($value);
- }
- class DrupalDefaultMetaTag implements DrupalMetaTagInterface {
- protected $info;
- protected $data = array('value' => '');
- protected $weight = 0;
- function __construct(array $info, array $data = NULL) {
- $this->info = $info;
- if (isset($data)) {
- $this->data = $data;
- }
- }
- /**
- * Calculate the weight or this meta tag.
- *
- * @return integer
- */
- public function getWeight() {
- static $counter = 0;
- // If no weight value is found, stack this meta tag at the end.
- $weight = 100;
- if (!empty($this->info['weight'])) {
- $weight = $this->info['weight'];
- }
- return $weight + ($counter++ * 0.1);
- }
- public function getForm(array $options = array()) {
- return array();
- }
- public function getValue(array $options = array()) {
- return $this->tidyValue($this->data['value']);
- }
- public function getElement(array $options = array()) {
- $value = $this->getValue($options);
- if (strlen($value) === 0) {
- return array();
- }
- // The stack of elements that will be output.
- $elements = array();
- // Dynamically add each option to this setting.
- $base_element = isset($this->info['element']) ? $this->info['element'] : array();
- // Single item.
- if (empty($this->info['multiple'])) {
- $values = array($value);
- }
- // Multiple items.
- else {
- $values = array_filter(explode(',', $value));
- }
- // Loop over each item.
- if (!empty($values)) {
- foreach ($values as $ctr => $value) {
- $value = trim($value);
- // Some meta tags must be output as secure URLs.
- if (!empty($this->info['secure'])) {
- $value = str_replace('http://', 'https://', $value);
- }
- // Combine the base configuration for this meta tag with the value.
- $element = $base_element + array(
- '#theme' => 'metatag',
- '#tag' => 'meta',
- '#id' => 'metatag_' . $this->info['name'] . '_' . $ctr,
- '#name' => $this->info['name'],
- '#value' => $value,
- '#weight' => $this->getWeight(),
- );
- // Add header information if desired.
- if (!empty($this->info['header'])) {
- $element['#attached']['drupal_add_http_header'][] = array($this->info['header'], $value);
- }
- $elements[] = array($element, $element['#id']);
- }
- }
- if (!empty($elements)) {
- return array(
- '#attached' => array('drupal_add_html_head' => $elements),
- );
- }
- }
- /**
- * Remove unwanted formatting from a meta tag.
- *
- * @param $value string
- * The meta tag value to be tidied up.
- *
- * @return string
- * The meta tag value after it has been tidied up.
- */
- public function tidyValue($value) {
- // Specifically replace encoded spaces, because some WYSIWYG editors are
- // silly. Do this before decoding the other HTML entities so that the output
- // doesn't end up with a bunch of a-circumflex characters.
- $value = str_replace(' ', ' ', $value);
- // Convert any HTML entities into regular characters.
- $value = decode_entities($value);
- // Remove any HTML code that might have been included.
- $value = strip_tags($value);
- // Strip errant whitespace.
- $value = str_replace(array("\r\n", "\n", "\r", "\t"), ' ', $value);
- $value = str_replace(' ', ' ', $value);
- $value = str_replace(' ', ' ', $value);
- $value = trim($value);
- return $value;
- }
- }
- /**
- * Text-based meta tag controller.
- */
- class DrupalTextMetaTag extends DrupalDefaultMetaTag {
- public function getForm(array $options = array()) {
- $options += array(
- 'token types' => array(),
- );
- $form['value'] = isset($this->info['form']) ? $this->info['form'] : array();
- $form['value'] += array(
- '#type' => 'textfield',
- '#title' => $this->info['label'],
- '#description' => !empty($this->info['description']) ? $this->info['description'] : '',
- '#default_value' => isset($this->data['value']) ? $this->data['value'] : '',
- '#element_validate' => array('token_element_validate'),
- '#token_types' => $options['token types'],
- '#maxlength' => 1024,
- );
- if (!empty($this->info['multiple'])) {
- $form['value']['#description'] .= ' ' . t('Multiple values may be used, separated by a comma. Note: Tokens that return multiple values will be handled automatically.');
- }
- // Support for dependencies, using Form API's #states system.
- // @see metatag.api.php.
- // @see https://api.drupal.org/drupal_process_states
- if (!empty($this->info['dependencies'])) {
- foreach ($this->info['dependencies'] as $specs) {
- $form['value']['#states']['visible'][':input[name*="[' . $specs['dependency'] . '][' . $specs['attribute'] . ']"]'] = array(
- $specs['condition'] => $specs['value'],
- );
- }
- }
- return $form;
- }
- public function getValue(array $options = array()) {
- $options += array(
- 'instance' => '',
- 'token data' => array(),
- 'clear' => TRUE,
- 'sanitize' => TRUE,
- 'raw' => FALSE,
- );
- $name = "metatag:" . $options["instance"] . ":" . $this->info["name"];
- $value = metatag_translate($name, $this->data['value']);
- if (empty($options['raw'])) {
- // Give other modules the opportunity to use hook_metatag_pattern_alter()
- // to modify defined token patterns and values before replacement.
- drupal_alter('metatag_pattern', $value, $options['token data'], $this->info['name']);
- $value = token_replace($value, $options['token data'], $options);
- }
- return $this->tidyValue($value);
- }
- }
- /**
- * Link type meta tag controller.
- */
- class DrupalLinkMetaTag extends DrupalTextMetaTag {
- public function getElement(array $options = array()) {
- $element = isset($this->info['element']) ? $this->info['element'] : array();
- $value = $this->getValue($options);
- if (strlen($value) === 0) {
- return array();
- }
- $element += array(
- '#theme' => 'metatag_link_rel',
- '#tag' => 'link',
- '#id' => 'metatag_' . $this->info['name'],
- '#name' => $this->info['name'],
- '#value' => $value,
- '#weight' => $this->getWeight(),
- );
- if (!isset($this->info['header']) || !empty($this->info['header'])) {
- // Also send the generator in the HTTP header.
- // @todo This does not support 'rev' or alternate link headers.
- $element['#attached']['drupal_add_http_header'][] = array('Link', '<' . $value . '>;' . drupal_http_header_attributes(array('rel' => $element['#name'])), TRUE);
- }
- return array(
- '#attached' => array('drupal_add_html_head' => array(array($element, $element['#id']))),
- );
- }
- }
- /**
- * Title meta tag controller.
- *
- * This extends DrupalTextMetaTag as we need to alter variables in
- * template_preprocess_html() rather output a normal meta tag.
- */
- class DrupalTitleMetaTag extends DrupalTextMetaTag {
- public function getElement(array $options = array()) {
- $element = array();
- $value = $this->getValue($options);
- $element['#attached']['metatag_set_preprocess_variable'][] = array('html', 'head_title', $value);
- $element['#attached']['metatag_set_preprocess_variable'][] = array('html', 'head_array', array('title' => $value));
- return $element;
- }
- }
- /**
- * Multiple value meta tag controller.
- */
- class DrupalListMetaTag extends DrupalDefaultMetaTag {
- function __construct(array $info, array $data = NULL) {
- // Ensure that the $data['value] argument is an array.
- if (empty($data['value'])) {
- $data['value'] = array();
- }
- $data['value'] = (array) $data['value'];
- parent::__construct($info, $data);
- }
- public function getForm(array $options = array()) {
- $form['value'] = isset($this->info['form']) ? $this->info['form'] : array();
- $form['value'] += array(
- '#type' => 'checkboxes',
- '#title' => $this->info['label'],
- '#description' => !empty($this->info['description']) ? $this->info['description'] : '',
- '#default_value' => isset($this->data['value']) ? $this->data['value'] : array(),
- );
- return $form;
- }
- public function getValue(array $options = array()) {
- $values = array_keys(array_filter($this->data['value']));
- sort($values);
- $value = implode(', ', $values);
- return $this->tidyValue($value);
- }
- }
- /**
- * Date interval meta tag controller.
- */
- class DrupalDateIntervalMetaTag extends DrupalDefaultMetaTag {
- public function getForm(array $options = array()) {
- $form['value'] = array(
- '#type' => 'textfield',
- '#title' => t('@title interval', array('@title' => $this->info['label'])),
- '#default_value' => isset($this->data['value']) ? $this->data['value'] : '',
- '#element_validate' => array('element_validate_integer_positive'),
- '#maxlength' => 4,
- '#description' => isset($this->info['description']) ? $this->info['description'] : '',
- );
- $form['period'] = array(
- '#type' => 'select',
- '#title' => t('@title interval type', array('@title' => $this->info['label'])),
- '#default_value' => isset($this->data['period']) ? $this->data['period'] : '',
- '#options' => array(
- '' => t('- none -'),
- 'day' => t('Day(s)'),
- 'week' => t('Week(s)'),
- 'month' => t('Month(s)'),
- 'year' => t('Year(s)'),
- ),
- );
- return $form;
- }
- public function getValue(array $options = array()) {
- $value = '';
- if (!empty($this->data['value'])) {
- $interval = intval($this->data['value']);
- if (!empty($interval) && !empty($this->data['period'])) {
- $period = $this->data['period'];
- $value = format_plural($interval, '@count ' . $period, '@count ' . $period . 's');
- }
- }
- return $value;
- }
- }
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