<?php

function _viewselector_add_title_if_empty(&$view) {
  // if the form doesn't have any fields, we add the node title (with link)
  // option. This is fragile as it depends on the field code not changing.
  // if somethig breaks, look here.
  if (empty($view->field)) {
    $title = array (
      'vid' => $view->vid,
      'tablename' => 'node',
      'field' => 'title',
      'label' => NULL,
      'handler' => 'views_handler_field_nodelink',
      'sortable' => 0,
      'defaultsort' => 0,
      'options' => 'link',
      'position' => 0,
      'fullname' => 'node.title',
      'id' => 'node.title',
      'queryname' => 'node_title',
    );
    $view->field[] = $title;
  }

}

function _viewselector_filters_form($view) {
  $filters = _views_get_filters();
  foreach ($view->exposed_filter as $count => $expose) {
    //dprint_r($count);
    //dprint_r($expose);
    $id = $expose['id'];
    $filterinfo = $filters[$id];
    foreach ($view->filter as $filter) {
      if ($filter['id'] == $id) {
        break;
      }
    }

    // set up the operator widget.
    if (!$expose['operator']) {
      // 'operator' is either an array or a handler
      $operator = $filterinfo['operator'];
      if (!is_array($operator) && function_exists($filterinfo['operator']))  {
        $operator = $filterinfo['operator']('operator', $filterinfo);
      }

      $form["op$count"] = array(
        '#type' => 'select',
        '#default_value' => $filter['operator'],
        '#options' => $operator,
        '#title' => $expose['label'], 
      );
    }

    // set up the filter widget.
    $item = $filterinfo['value'];

    if (!is_array($item['#options']) && function_exists($item['#options'])) {
      $item['#options'] = $item['#options']('value', $filterinfo);
    }
    if (!$expose['optional'] || $expose['is_default']) {
      $item['#default_value'] = $filter['value'];
    }

    if ($expose['single']) {
      unset($item['#multiple']);
    }
    if ($expose['optional'] && is_array($item['#options'])) {
      $item['#options'] = array('**ALL**' => t('<All>')) + $item['#options'];
    }

    if ($item['#multiple'] && is_array($item['#options'])) {
      $item['#size'] = min(count($item['#options']), 8);
    }
    
    $form["filter$count"] = $item;
  }
  
  return $form;
}

function _viewselector_edit_filters(&$view, $form_values) {
  //dprint_r("In edit filters");
  //dprint_r($view);
  //dprint_r($form_values);

  foreach($form_values as $key => $value) {
    if (strpos($key, 'op') === 0) {
      // key starts with op
      $op_num = substr($key, 2);
      $view->filter[$op_num]['operator'] = $value;
      
    } else if (strpos($key, 'filter') === 0) {
      // key starts with filter
      $filter_num = substr($key, 6);
	    if ($value == '**ALL**' || (is_array($value) && in_array('**ALL**', $value))) {
		    unset($view->filter[$filter_num]); // this filter is not used if "all" is selected
	    }
      $view->filter[$filter_num]['value'] = $value;
    }
  }
}

function _viewselector_add_selection_column(&$view, $extras = NULL) {
  
  $select_field = array (
    'vid' => $view->vid,
    'tablename' => 'selector',
    'field' => 'select',
    'label' => t('Select'),
    'handler' => '',
    'sortable' => 0,
    'defaultsort' => 0,
    'options' => '',
    'position' => 0, 
    'fullname' => 'selector.select',
    'id' => 'selector.select',
    'queryname' => 'selector_select',
  );
  
  if (!is_array($extras)) {
    $extras = array();
  }
  foreach($extras as $property => $value) {
    $select_field[$property] = $value;
  }
  
  array_unshift($view->field, $select_field);
  
}

function _viewselector_build_view_from_element($element, $mode = 'embed', $view = NULL) {
  if (is_null($view)) {
    $view = $element['#view'];
  }
  
  return views_build_view(
    $mode,
    $view,
    $element['#arguments'],
    FALSE, // we do not want the built in pager
    $view->nodes_per_page, // use the default paging setting
    $element['#page']); 
}

function _viewselector_get_page_data($view, $args = NULL) {

  $queries = views_build_view('queries', $view, $args);
  if (empty($queries)) {
    return array ('count' => 0, 'pages' => 0);
  }
  // rewrite the query appropriately
  $cquery = db_rewrite_sql($queries['countquery'], 'node', 'nid');
  $count = db_result(db_query($cquery, $queries['args']));
  if ($view->nodes_per_page) {
    $pages = ceil($count / $view->nodes_per_page);
  } else {
    $pages = 1;
  }
  
  return array (
    'count' => $count,
    'pages' => $pages,
  );
}