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<?php
// $Id$
/**
* @file
* Defines simple link field types.
*/
/**
* Implementation of hook_help().
*/
function link_help($section) {
switch ($section) {
case 'admin/modules#description':
return t('Defines simple link field types. <em>Note: Requires content.module.</em>');
}
}
/**
* Implementation of hook_field_info().
*/
function link_field_info() {
return array(
'link' => array('label' => 'Link'),
);
}
/**
* Implementation of hook_field_settings().
*/
function link_field_settings($op, $field) {
switch ($op) {
case 'form':
$form = array();
$options = array(
'default' => t('Default (no target attribute)'),
'_top' => t('Open link in window root'),
'_blank' => t('Open link in new window'),
'user' => t('Allow the user to choose'),
);
$form['attributes'] = array (
'#tree' => true,
);
$form['attributes']['target'] = array(
'#type' => 'radios',
'#title' => t('Link Target'),
'#default_value' => $field['attributes']['target'] ? $field['attributes']['target'] : 'default',
'#options' => $options,
);
return $form;
case 'save':
return array('attributes');
}
}
/**
* Implementation of hook_field().
*/
function link_field($op, &$node, $field, &$node_field, $teaser, $page) {
switch ($op) {
case 'load':
switch($field['type']) {
case 'link':
$result = db_query("SELECT field_url, field_title, attributes FROM {node_field_link_data} WHERE vid = %d AND field_name = '%s' ORDER BY delta", $node->vid, $field['field_name']);
if ($field['multiple']) {
$values = array();
while ($value = db_fetch_array($result)) {
$values[] = array('value' => array('link' => $value['field_url'], 'title' => $value['field_title'], 'attributes' => unserialize($value['attributes'])));
}
$additions = array($field['field_name'] => $values);
}
else {
$dbvalue = db_fetch_array($result);
$value = array ('link' => $dbvalue['field_url'], 'title' => $dbvalue['field_title'], 'attributes' => unserialize($dbvalue['attributes']));
$additions = array($field['field_name'] => array('value' => $value));
}
break;
}
return $additions;
case 'view':
$output = '';
if ($field['multiple']) {
foreach ($node_field as $delta => $item) {
$node_field[$delta]['view'] = link_field_view($field, $item['value'], $item, $node);
}
}
else {
$node_field['view'] = link_field_view($field, $node_field['value'], $node_field, $node);
}
$node->$field['field_name'] = $node_field;
if ($field['multiple']) {
$output = '';
foreach ($node_field as $delta => $item) {
$output .= '<div class="'. $field['field_name'] .'">'. $item['view'] .'</div>';
}
return $output;
}
else {
return '<div class="'. $field['field_name'] .'">'. $node_field['view'] .'</div>';
}
case 'insert':
switch($field['type']) {
case 'link':
if ($field['multiple']) {
foreach ($node_field as $delta => $item) {
if ($item['value']['link']) {
db_query("INSERT INTO {node_field_link_data} (nid, vid, field_name, delta, field_url, field_title, attributes) VALUES (%d, %d, '%s', %d, '%s', '%s', '%s')", $node->nid, $node->vid, $field['field_name'], $delta, $item['value']['link'], $item['value']['title'], serialize($item['value']['attributes']));
}
}
}
else {
if ($node_field['value']['link']) {
db_query("INSERT INTO {node_field_link_data} (nid, vid, field_name, field_url, field_title, attributes) VALUES (%d, %d, '%s', '%s', '%s', '%s')", $node->nid, $node->vid, $field['field_name'], $node_field['value']['link'], $node_field['value']['title'], serialize($node_field['value']['attributes']));
}
}
break;
}
return;
case 'update':
// Delete and insert, rather than update, in case a field was added.
switch($field['type']) {
case 'link':
link_field('delete', $node, $field, $node_field, $teaser, $page);
link_field('insert', $node, $field, $node_field, $teaser, $page);
break;
}
return;
case 'delete':
// Delete using nid rather than vid to purge all revisions.
switch($field['type']) {
case 'link':
db_query("DELETE FROM {node_field_link_data} WHERE nid = %d AND field_name = '%s'", $node->nid, $field['field_name']);
break;
}
return;
}
}
/**
* Implementation of hook_widget_info().
*/
function link_widget_info() {
return array(
'link' => array(
'label' => 'Text Fields for Title and URL',
'field types' => array('link'),
),
);
}
/**
* Implementation of hook_widget().
*/
function link_widget($op, &$node, $field, &$node_field) {
switch ($op) {
case 'form':
$form = array();
$form[$field['field_name']] = array('#tree' => TRUE);
if ($field['multiple']) {
// Generate more fields if necessary on preview
if ($_POST['edit'][$field['field_name']]) {
$node_field = $_POST['edit'][$field['field_name']];
}
// Convert an old 'single' value field into the first value of a new multi-value field
if ($node_field['value']) {
$node_field[0]['value'] = $node_field['value'];
unset($node_field['value']);
}
$delta = 0;
foreach ($node_field as $data) {
if ($data['value']['link']) {
$form[$field['field_name']][$delta]['value'] = array(
'#type' => 'fieldset',
'#title' => t($field['widget']['label']),
'#tree' => true,
);
$form[$field['field_name']][$delta]['value']['link'] = array(
'#type' => 'textfield',
'#title' => t('URL'),
'#default_value' => $data['value']['link'],
'#required' => ($delta == 0) ? $field['required'] : FALSE,
);
$form[$field['field_name']][$delta]['value']['title'] = array(
'#type' => 'textfield',
'#title' => t('Title'),
'#default_value' => $data['value']['title'],
);
if ($field['attributes']['target'] == 'user') {
$form[$field['field_name']][$delta]['value']['attributes']['target'] = array(
'#type' => 'checkbox',
'#title' => t('Open New Window'),
'#default_value' => $data['value']['attributes']['target'],
'#return_value' => "_blank",
);
}
$delta++;
}
}
foreach (range($delta, $delta + 1) as $delta) {
$form[$field['field_name']][$delta]['value'] = array(
'#type' => 'fieldset',
'#title' => t($field['widget']['label']),
'#tree' => true,
);
$form[$field['field_name']][$delta]['value']['link'] = array(
'#type' => 'textfield',
'#title' => t('URL'),
'#default_value' => $node_field[$delta]['value']['link'],
'#required' => ($delta == 0) ? $field['required'] : FALSE,
);
$form[$field['field_name']][$delta]['value']['title'] = array(
'#type' => 'textfield',
'#title' => t('Title'),
'#default_value' => $node_field[$delta]['value']['title'],
);
if ($field['attributes']['target'] == 'user') {
$form[$field['field_name']][$delta]['value']['attributes']['target'] = array(
'#type' => 'checkbox',
'#title' => t('Open New Window'),
'#return_value' => "_blank",
);
}
}
} // end if multiple
else {
$form[$field['field_name']]['value'] = array(
'#type' => 'fieldset',
'#title' => t($field['widget']['label']),
'#tree' => true,
);
$form[$field['field_name']]['value']['link'] = array(
'#type' => 'textfield',
'#title' => t('URL'),
'#default_value' => $node_field['value']['link'],
'#required' => ($delta == 0) ? $field['required'] : FALSE,
);
$form[$field['field_name']]['value']['title'] = array(
'#type' => 'textfield',
'#title' => t('Title'),
'#default_value' => $node_field['value']['title'],
);
if ($field['attributes']['target'] == 'user') {
$form[$field['field_name']]['value']['attributes']['target'] = array(
'#type' => 'checkbox',
'#title' => t('Open New Window'),
'#default_value' => $node_field['value']['attributes']['target'],
'#return_value' => "_blank",
);
}
}
return $form;
case 'validate':
if ($field['multiple']) {
foreach($node_field as $delta => $value) {
if ($node_field[$delta]['value']['link']) {
if (!link_validate_link($value['value']['link'])) {
form_set_error($field['field_name'] .']['. $delta. '][value][link', t('Not a valid URL.'));
}
}
}
}
else {
if ($node_field['value']['link']) {
if (!link_validate_link($node_field['value']['link'])) {
form_set_error($field['field_name'] .'][value][link', t('Not a valid URL.'));
}
}
}
return;
case 'process form values':
if ($field['multiple']) {
foreach($node_field as $delta => $value) {
if (!$node_field[$delta]['value']['attributes']['target'] || $node_field[$delta]['value']['attributes']['target'] == "default") {
unset($node_field[$delta]['value']['attributes']['target']);
}
}
}
else {
if (!$node_field['value']['attributes']['target'] || $node_field[$delta]['value']['attributes']['target'] == "default") {
unset($node_field['value']['attributes']['target']);
}
}
return;
case 'submit':
return;
}
}
/**
* Implementation of hook_field_view() which performs any translation necessary.
*/
function link_field_view($field, $value, $addlfields = array(), $node = NULL) {
// Add attributes defined at the widget level
if (is_array($value['attributes'])) {
foreach($value['attributes'] as $attribute => $attbvalue) {
if (isset($field['attributes'][$attribute]) && $field['attributes'][$attribute] == 'user') {
$attributes .= ' '.$attribute.'="'.$attbvalue.'"';
}
}
}
// Add attributes defined at the field level
if (is_array($field['attributes'])) {
foreach($field['attributes'] as $attribute => $attbvalue) {
if (!empty($attbvalue) && $attbvalue != 'default' && $attbvalue != 'user') {
$attributes .= ' '.$attribute.'="'.$attbvalue.'"';
}
}
}
// Build the link with a title
if (strlen(trim($value['title']))) {
$output = '<a href="'.$value['link'].'"'.$attributes.'>'.check_plain($value['title']).'</a>';
}
// Build the link with the URL as the title
else {
$output = '<a href="'.$value['link'].'"'.$attributes.'>'.$value['link'].'</a>';
}
return $output;
}
/**
* Implementation of hook_views_tables().
*/
function link_views_tables() {
$tables = array();
$fields = content_fields();
foreach ($fields as $field) {
if ($field['type'] == 'link') {
$tables['node_field_link_data_'. $field['field_name']] = array(
'name' => 'node_field_link_data',
'join' => array(
'left' => array(
'table' => 'node',
'field' => 'vid',
),
'right' => array(
'field' => 'vid',
),
'extra' => array('field_name' => $field['field_name']),
),
'fields' => array(
'field_url' => array(
'name' => 'Link URL: '. $field['field_name'],
'sortable' => TRUE,
),
'field_title' => array(
'name' => 'Link Title: '. $field['field_name'],
'sortable' => TRUE,
),
),
'sorts' => array(
'field_url' => array('name' => 'Link URL: '. $field['field_name']),
'field_title' => array('name' => 'Link Title: '. $field['field_name']),
),
'filters' => array(
'field_url' => array(
'name' => 'Link URL: '. $field['field_name'],
'operator' => array(
'=' => 'is',
'contains' => 'contains',
'begins' => 'begins with',
'ends' => 'ends wth',
'LIKE' => 'matches pattern',
),
'operator-handler' => '_text_filter_operator',
),
'field_title' => array(
'name' => 'Link Title: '. $field['field_name'],
'operator' => array(
'=' => 'is',
'contains' => 'contains',
'begins' => 'begins with',
'ends' => 'ends wth',
'LIKE' => 'matches pattern',
),
'operator-handler' => '_text_filter_operator',
),
),
);
}
}
return $tables;
}
function link_validate_link($text) {
if (!preg_match(
// The protocols: http://
'/^((https|http|ftp|news):\/\/)?'.
'('.
// domains
'(([a-z0-9]([a-z0-9\-_]*\.)+)(aero|arpa|biz|com|coop|edu|gov|info|int|jobs|mil|museum|name|nato|net|org|pro|travel|[a-z]{2}))'.
// OR ip addresses
'|(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})'.
')'.
// port number
'(:([0-9]{1,4}))?'.
// the rest of the path
'(\/[a-z0-9_\-\.~]+)*(\/([a-z0-9_\-\.]*)(\?[a-z0-9+_\-\.\/%=&]*)?)?'.
// forward slash 0 or 1 times
'(\/)?'.
// end of the expression, case insensitive
'$/i', $text, $m)) {
return false;
}
else {
$url = new stdClass();
$url->protocol = $m[2];
$url->hostname = strtolower($m[5]).strtolower($m[7]);
$url->ip = $m[8];
$url->port = $m[10];
return $url;
}