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<?php
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// $Id: excerpt.module,v 1.14 2009/10/08 17:44:44 hanoii Exp $
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/**
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* Implementation of hook_nodeapi().
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*/
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function excerpt_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
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if (variable_get('excerpt_'. $node->type, 1)) {
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switch ($op) {
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case 'submit':
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// Due to the presence of the teaser field in the node form,
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// node.module doesn't generate a teaser from the body upon submit.
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// In case the field has been left empty, it's up to us to generate one.
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if (trim($node->teaser) == '') {
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$node->teaser = isset($node->body) ? node_teaser($node->body, isset($node->format) ? $node->format : NULL) : '';
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}
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break;
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case 'load':
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// Support for nodes saved with earlier versions of excerpt. The teaser
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// will now be created when submitting the node form to take some load
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// from the server.
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if (trim($node->teaser) == '' && $node->body != '') {
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$node->teaser = node_teaser($node->body, isset($node->format) ? $node->format : NULL);
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}
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// node.module just checks whether the length of the teaser is less
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// than the body length to decide whether a "read more" link is to be
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// shown. With excerpts however, teasers can be even longer than the
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// body field, which is why we need to overwrite that property with our
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// own condition.
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$excerpt = db_fetch_object(db_query("SELECT * FROM {excerpt} WHERE nid = %d AND vid = %d", $node->nid, $node->vid));
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return array(
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'excerpt' => (bool)strcmp($node->teaser, $node->body),
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'teaser_format' => $excerpt->format,
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);
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case 'delete revision':
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db_query("DELETE FROM {excerpt} WHERE nid = %d and vid = %d", $node->nid, $node->vid);
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break;
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case 'delete':
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db_query("DELETE FROM {excerpt} WHERE nid = %d", $node->nid);
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break;
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case 'update':
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// Existing nodes may not have an excerpt information stored,
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// Check to see if we need to update one or create a new one.
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$excerpt = db_fetch_object(db_query("SELECT * FROM {excerpt} WHERE nid = %d AND vid = %d", $node->nid, $node->vid));
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if (empty($node->revision) && $excerpt) {
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$primary_keys = array('vid');
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}
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case 'insert':
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$excerpt = array();
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$excerpt['vid'] = $node->vid;
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$excerpt['nid'] = $node->nid;
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$excerpt['format'] = $node->teaser_format;
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drupal_write_record('excerpt', $excerpt, $primary_keys);
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break;
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case 'view':
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$node->readmore = $node->excerpt;
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// Because now we control the format of the teaser, we should check
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// its markup against it
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// See @node_prepare, @node_build_content
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// As we are 'setting' the teaser, and not adding content,
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// we want this module's hook to be called first of all,
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// that's why the module's weight is set to -10 in the install file
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$node->teaser = check_markup($node->teaser, $node->teaser_format, FALSE);
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break;
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}
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}
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}
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/**
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* Implementation of hook_form_alter().
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*/
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function excerpt_form_alter(&$form, $form_state, $form_id) {
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if ($form_id == 'node_type_form') {
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$form['workflow']['excerpt']['excerpt'] = array(
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'#type' => 'radios',
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'#title' => t('Teaser'),
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'#default_value' => variable_get('excerpt_'. $form['#node_type']->type, 1),
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'#options' => array(t('Auto-generated'), t('Manual excerpt')),
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'#description' => t('Choose whether the node teaser must be generated automatically or manually entered by the author.'),
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);
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if (!module_exists('content')) {
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$form['workflow']['excerpt']['excerpt_wt'] = array(
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'#type' => 'weight',
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'#title' => t('Weight of Teaser field'),
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'#default_value' => variable_get('excerpt_wt_'. $form['#node_type']->type, 0),
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);
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}
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}
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else if (isset($form['type']) && $form['type']['#value'] .'_node_form' == $form_id && variable_get('excerpt_'. $form['type']['#value'], 1) == 1) {
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$form['teaser_field'] = array(
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'#weight' => module_exists('content') ? content_extra_field_weight($form['type']['#value'], 'teaser') : variable_get('excerpt_wt_'. $form['type']['#value'], 0),
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);
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$form['teaser_field']['teaser'] = array(
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'#type' => 'textarea',
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'#title' => t('Teaser'),
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'#default_value' => $form['#node']->teaser,
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'#cols' => 60,
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'#rows' => $form['body_field']['body']['#rows'],
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'#description' => t('Enter an excerpt for this item. It will be shown on listing pages along with a <em>read more</em> link which leads to the full view. Leave empty to auto-generate one from the body.'),
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);
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$form['teaser_field']['format'] = filter_form($form['#node']->teaser_format, 1, array('teaser_format'));
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$form['body_field']['body']['#default_value'] = $form['#node']->body;
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if(isset($form['body_field']['teaser_js'])) {
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unset($form['body_field']['teaser_js']);
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unset($form['body_field']['teaser_include']);
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if(!empty($form['body_field']['#after_build'])) {
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if ($id = array_search('node_teaser_js', $form['body_field']['#after_build'])) {
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unset($form['body_field']['#after_build'][$id]);
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}
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if($id = array_search('node_teaser_include_verify', $form['body_field']['#after_build'])) {
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unset($form['body_field']['#after_build'][$id]);
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}
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}
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}
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}
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}
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/**
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* Implementation of hook_content_extra_fields.
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*/
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function excerpt_content_extra_fields($type_name) {
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$type = node_get_types('type', $type_name);
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$extra = array();
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if (variable_get('excerpt_'. $type_name, 1)) {
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$extra['teaser'] = array(
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'label' => t('Excerpt'),
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'description' => t('Manual excerpt'),
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'weight' => variable_get('excerpt_wt_'. $type_name, 0),
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);
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}
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return $extra;
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}
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