<?php
// $Id: views_bulk_operations.views.inc,v 1.1 2008-07-24 20:56:19 kratib Exp $

function views_bulk_operations_views_plugins() {
  return array(
    'style' => array(
      'bulk' => array(
        'title' => t('Bulk Operations'),
        'help' => t('Displays nodes with checkmarks for bulk actions.'),
        'handler' => 'views_bulk_operations_plugin_style',
        'uses row plugin' => TRUE,
        'uses fields' => TRUE,
        'uses options' => TRUE,
        'type' => 'normal',
      ),
    ),
  );
}

class views_bulk_operations_plugin_style extends views_plugin_style {
  function options(&$options) {
    $options['selected_operations'] = array();
    $this->populate_operations($options);
  }

  function options_form(&$form, &$form_values) {
    $form['selected_operations'] = array(
      '#type' => 'checkboxes',
      '#title' => t('Selected operations'),
      '#options' => $this->get_operations_options(), 
      '#default_value' => $this->options['selected_operations'],
    );
  }

  function options_validate(&$form, &$form_values) {
  }

  function render() {
    return drupal_get_form('views_bulk_operations_form', $this);
  }

  function get_selected_operations() {
    $selected = array();
    foreach (array_filter($this->options['selected_operations']) as $key => $operation) {
      $selected[$key] = $this->options['all_operations'][$key]['label'];
    }
    return $selected;
  }

  function get_operation_info($key) {
    return $this->options['all_operations'][$key];
  }

  private function get_operations_options() {
    $options = array();
    foreach ($this->options['all_operations'] as $key => $operation) {
      $options[$key] = $operation['label'] .' ('. $operation['callback'] .')'; 
    }
    return $options;
  }

  private function populate_operations(&$options) {
    $operations = array();

    $node_operations = module_invoke_all('node_operations');
    foreach ($node_operations as $operation) {
      if (empty($operation['callback'])) continue;
      $key = md5($operation['callback']);
      $operations[$key] = array(
        'label'              => $operation['label'],
        'callback'           => $operation['callback'],
        'callback arguments' => $operation['callback arguments'],
        'configurable'       => false,
        'type'               => 'node',                                                     
      );
    }
    
    $action_operations = actions_list() + $this->get_custom_actions();
    foreach ($action_operations as $callback => $values) {
      foreach (array('node', 'workflow', 'email') as $type) {
        if (0 != strcasecmp($type, $values['type'])) continue;
        $key = md5($callback);
        $operations[$key] = array(
          'label'              => $values['description'],
          'callback'           => $callback,
          'callback arguments' => $values['parameters'],
          'configurable'       => $values['configurable'],
          'type'               => 'action',
        );
        break; // out of inner, type-searching loop
      }                                                                                                         
    }

    $options['all_operations'] = $operations;
  }

  private function get_custom_actions() {
    $actions = array();
    $result = db_query("SELECT * FROM {actions} WHERE parameters > ''");
    while ($action = db_fetch_object($result)) {
      $actions[$action->aid] = array(
        'description' => $action->description,
        'type' => $action->type,
        'configurable' => FALSE,
        'parameters' => $actions->parameters,
      );
    }
    return $actions;
  }
}