franck@0: <?php
franck@0: // $Id: views_calc_field_handler.inc,v 1.3 2009/04/21 12:15:28 karens Exp $
franck@0: /**
franck@0:  * @file
franck@0:  * Copied from the basic 'node' field handler.
franck@0:  */
franck@0: 
franck@0: /**
franck@0:  * Field handler to provide simple renderer that allows linking to a node.
franck@0:  */
franck@0: class views_calc_field_handler extends views_handler_field {
franck@0:   /**
franck@0:    * Constructor to provide additional field to add.
franck@0:    */
franck@0:   function construct() {
franck@0:     parent::construct();
franck@0:     $this->additional_fields['nid'] = 'nid';
franck@0:   }
franck@0: 
franck@0:   function option_definition() {
franck@0:     $options = parent::option_definition();
franck@0:     $options['link_to_node'] = array('default' => FALSE);
franck@0:     return $options;
franck@0:   }
franck@0: 
franck@0:   /**
franck@0:    * Provide link to node option
franck@0:    */
franck@0:   function options_form(&$form, &$form_state) {
franck@0:     parent::options_form($form, $form_state);
franck@0:     $form['link_to_node'] = array(
franck@0:       '#title' => t('Link this field to its node'),
franck@0:       '#type' => 'checkbox',
franck@0:       '#default_value' => !empty($this->options['link_to_node']),
franck@0:     );
franck@0:   }
franck@0: 
franck@0:   /**
franck@0:    * Render whatever the data is as a link to the node.
franck@0:    *
franck@0:    * Data should be made XSS safe prior to calling this function.
franck@0:    */
franck@0:   function render_link($data, $values) {
franck@0:     if (!empty($this->options['link_to_node'])) {
franck@0:       return l($data, "node/" . $values->{$this->aliases['nid']}, array('html' => TRUE));
franck@0:     }
franck@0:     else {
franck@0:       return $data;
franck@0:     }
franck@0:   }
franck@0: 
franck@0:   /**
franck@0:    * Find the right calculation and add it to the query as
franck@0:    * an aliased field.
franck@0:    */
franck@0:   function query() {
franck@0:     $results = _views_calc_fields();
franck@0:     while ($calc_field = db_fetch_array($results)) {
franck@0:       if ($this->definition['cid'] == $calc_field['cid']) {
franck@0:         foreach (explode(',', $calc_field['tablelist']) as $table) {
franck@0:           $this->view->query->add_table($table);
franck@0:         }
franck@0:         $this->view->query->add_field(NULL, "({$calc_field['calc']})", "cid". $calc_field['cid']);
franck@0:         return;
franck@0:       }
franck@0:     }    
franck@0:   }
franck@0:   
franck@0:   function pre_query() {
franck@0:     $this->field_alias = "cid{$this->definition['cid']}";
franck@0:     parent::pre_query();
franck@0:   }
franck@0:   
franck@0:   /**
franck@0:    * Use the requested format function to render the raw alias value.
franck@0:    */
franck@0:   function render($values) {
franck@0:     $field_alias = "cid{$this->definition['cid']}";
franck@0:     
franck@0:     $value = $values->$field_alias;
franck@0:     $formats = _views_calc_format_options();
franck@0:     $format = $formats[$this->definition['format']];
franck@0:     $tmp = explode(':', $format);
franck@0:     $function = trim($tmp[0]);
franck@0:     $vars     = count($tmp) == 2 ? $tmp[1] : '';
franck@0:     if ($function == 'custom') {
franck@0:       $tmp = explode(':', $this->definition['custom']);
franck@0:       $function = trim($tmp[0]);
franck@0:       $vars     = count($tmp) == 2 ? $tmp[1] : '';
franck@0:     }
franck@0:     if (empty($function) || $function == 'none') {
franck@0:       $function = 'check_plain';
franck@0:     }
franck@0:     $raw = $function($value, $vars);
franck@0: 
franck@0:     // This needs to be set for the $this->render_link() to work. It would
franck@0:     // have been set in the query, if we hadn't bypassed the normal query.
franck@0:     // TODO there may be a better way to do this.
franck@0:     $this->aliases['nid'] = 'nid';
franck@0: 
franck@0:     return $this->render_link($raw, $values);
franck@0:   }
franck@0: }