<?php

/**
 * Implementation of hook_init().
 */
function spaces_ui_init() {
  if (arg(0) .'/'. arg(1) .'/'. arg(2) .'/'. arg(3) == 'admin/build/spaces/features') {
    include_once(drupal_get_path("module", "context_ui") ."/context_ui_admin.inc");
  }
}

/**
 * Implementation of hook_menu().
 */
function spaces_ui_menu($may_cache) {
  $items = array();
  if ($may_cache) {
    $items[] = array(
      'path' => 'admin/build/spaces/features',
      'title' => t('Features'),
      'description' => t('Page listing spaces features.'),
      'callback' => 'spaces_ui_features',
      'access' => user_access('administer spaces'),
      'type' => MENU_LOCAL_TASK,
    );
    $items[] = array(
      'path' => 'admin/build/spaces/features/list',
      'title' => t('List'),
      'description' => t('Page listing spaces features.'),
      'callback' => 'spaces_ui_features',
      'access' => user_access('administer spaces'),
      'type' => MENU_DEFAULT_LOCAL_TASK,
      'weight' => 0,
    );
    $items[] = array(
      'path' => 'admin/build/spaces/features/add',
      'title' => t('Add'),
      'description' => t('Add a new feature.'),
      'callback' => 'drupal_get_form',
      'callback arguments' => array('context_ui_form', 'add'),
      'access' => user_access('administer spaces'),
      'type' => MENU_LOCAL_TASK,
      'weight' => 1,
    );
  }
  return $items;
}

/**
 * Implementation of hook_context_define().
 */
function spaces_ui_context_define() {
  $items = array();
  $result = db_query('SELECT feature, value FROM {spaces_features_ui}');
  while ($row = db_fetch_object($result)) {
    $c = new StdClass();
    $c->namespace = 'spaces';
    $c->attribute = 'feature';
    $c->value = $row->feature;

    if ($c = context_ui_context('load', $c)) {
      $c->spaces = unserialize($row->value);
      // A small change in context_ui now allows modules to
      // set system/status explicitly -- not recommended except for
      // cases like this.
      $c->system = 0;
      $c->status = 1;

      $items[] = (array) $c;
    }
  }
  return $items;
}

/**
 * Implementation of hook_form_alter()
 */
function spaces_ui_form_alter($form_id, &$form) {
  switch ($form_id) {
    case 'context_ui_delete_confirm':
      $cid = $form['cid']['#value'];
      $context = context_ui_context('load', $cid);
      if ($context->namespace == 'spaces' && $context->attribute == 'feature') {
        $form['spaces_feature'] = array(
          '#type' => 'value',
          '#value' => $context->value,
        );
        $form['#submit']['spaces_ui_feature_delete'] = array();
        $form['#submit'] = array_reverse($form['#submit']);
      }
      break;
    case 'context_ui_form':
      // Determine whether we should treat this context as a spaces feature
      if ($form['namespace']['#default_value'] == 'spaces' && $form['attribute']['#default_value'] == 'feature') {
        $is_feature = TRUE;
      }
      else {
        $is_feature = FALSE;
      }

      // Load feature information: first attempt from DB, then fallback
      // to code definition.
      if (!empty($form['value']['#default_value'])) {
        $id = $form['value']['#default_value'];
        $row = db_fetch_object(db_query('SELECT * FROM {spaces_features_ui} WHERE feature = "%s"', $id));
        if ($row) {
          $feature = unserialize($row->value);
        }
        else {
          $features = spaces_features();
          if (isset($features[$id])) {
            $feature = $features[$id]->spaces;
          }
        }
      }

      // Add Feature information to context form
      $form['feature'] = array(
        '#type' => 'fieldset',
        '#title' => t('Spaces feature'),
        '#weight' => -5,
        '#tree' => true,
      );
      $form['feature']['label'] = array(
        '#type' => 'textfield',
        '#title' => t('Label'),
        '#description' => t('Name of the feature.'),
        '#required' => true,
        '#maxlength' => 30,
        '#default_value' => isset($feature['label']) ? $feature['label'] : '',
      );
      $form['feature']['description'] = array(
        '#type' => 'textfield',
        '#title' => t('Description'),
        '#description' => t('A brief description of the feature.'),
        '#required' => true,
        '#default_value' => isset($feature['description']) ? $feature['description'] : '',
      );

      // Space type compatibility
      $options = array(0 => t('All spaces'));
      foreach (spaces_types() as $type => $info) {
        $options[$type] = $info['title'];
      }
      $form['feature']['types'] = array(
        '#type' => 'select',
        '#title' => t('Compatibility'),
        '#description' => t('Choose the space type compatible with this feature.'),
        '#required' => true,
        '#options' => $options,
        '#default_value' => isset($feature['types']) ? $feature['types'] : 0,
      );

      // Spaces feature menu
      $menu_items = isset($feature['menu']) ? array_values($feature['menu']) : array();
      $menu_paths = isset($feature['menu']) ? array_keys($feature['menu']) : array();
      $form['feature']['menu'] = array(
        '#tree' => true,
        '#theme' => 'spaces_ui_feature_form_menu',
      );
      $form['feature']['menu']['help'] = array(
        '#title' => t('Feature menu'),
        '#type' => 'item',
        '#description' => t('Define a menu for this feature. Items will be arranged into a tree based on path. <strong>Example:</strong> "gallery/browse" will become a child item of "gallery".'),
      );
      for ($i = 0; $i < 10; $i++) {
        $form['feature']['menu'][$i] = array('#tree' => true);
        $form['feature']['menu'][$i]['path'] =
        $form['feature']['menu'][$i]['title'] = array(
          '#type' => 'textfield',
          '#size' => 30,
        );        
        $form['feature']['menu'][$i]['path']['#default_value'] = isset($menu_paths[$i]) ? $menu_paths[$i] : '';
        $form['feature']['menu'][$i]['title']['#default_value'] = isset($menu_items[$i]['title']) ? $menu_items[$i]['title'] : '';
      }

      // Force key and space to be 'feature', 'spaces' so that the spaces module knows what to do.
      $form['attribute']['#disabled'] = true;
      $form['attribute']['#default_value'] = 'feature';
      $form['namespace']['#disabled'] = true;
      $form['namespace']['#default_value'] = 'spaces';

      $form['#submit']['spaces_ui_feature_form_submit'] = array();
      $form['#submit'] = array_reverse($form['#submit']);

      $form['#redirect'] = 'admin/build/spaces/features';
      break;
  }
}

/**
 * Submit handler for spaces context_ui form alterations.
 */
function spaces_ui_feature_form_submit($form_id, $form_values) {
  $feature = $form_values['value'];
  $settings = array();
  $settings['label'] = $form_values['feature']['label'];
  $settings['description'] = $form_values['feature']['description'];

  // Types
  if ($form_values['feature']['types'] == 0) {
    $settings['types'] = array();
  }
  else {
    $settings['types'] = array($form_values['feature']['types']);
  }

  // Menu
  $settings['menu'] = array();
  foreach ($form_values['feature']['menu'] as $item) {
    if (!empty($item['title']) && !empty($item['path'])) {
      $settings['menu'][$item['path']] = array(
        'title' => $item['title']
      );
    }
  }
  ksort($settings['menu']);

  db_query('DELETE FROM {spaces_features_ui} WHERE feature = "%s"', $feature);
  db_query('INSERT INTO {spaces_features_ui} (feature, value) VALUES ("%s", "%s")', $feature, serialize($settings));
}

/**
 * Delete confirmation submit handler that deletes the spaces feature
 * values.
 */
function spaces_ui_feature_delete($form_id, $form_values) {
  $feature = $form_values['spaces_feature'];
  db_query('DELETE FROM {spaces_features_ui} WHERE feature = "%s"', $feature);
}

/**
 * Menu page callback that shows a listing of spaces features.
 */
function spaces_ui_features() {
  drupal_set_title(t('Spaces features'));
  $spaces_types = spaces_types();
  $spaces_features = spaces_features();

  $output = '';
  $rows = array();

  foreach ($spaces_features as $id => $feature) {
    // Load the context object for this feature
    //   @TODO: change context_ui load operation so that it wouldn't
    //   wipe out the spaces extension if loaded.
    $context = context_ui_context('load', $feature);

    // Basic information about this feature
    $label = "<strong>". $feature->spaces['label'] ."</strong>";
    $label .= "<div class='description'>". $feature->spaces['description'] ."</div>";

    // Generate action links for this item
    // @TODO: currently, override contexts also have a "Delete" link --
    // it should probably say "Revert". However, there is no easy way
    // to tell that the context is an override of a code context. This
    // is probably something that needs to change upstream
    // (in context_ui).
    $links = array();
    if ($context->system == 0) {
      $links[] = l(t('Edit'), 'admin/build/context/edit/'. $context->cid);
      $links[] = l(t('Delete'), 'admin/build/context/delete/'. $context->cid, array(), 'destination=admin/build/spaces/features');
    }
    else {
      $links[] = l(t('Override'), 'admin/build/context/clone/'. $context->cid);
    }
    $links = implode(' | ', $links);

    // Generate human readable version of spaces types
    if (isset($feature->spaces['types']) && count($feature->spaces['types'])) {
      $types = array();
      foreach ($feature->spaces['types'] as $type) {
        $types[] = $spaces_types[$type]['title'];
      }
      $types = implode(', ', $types);
    }
    else {
      $types = t('All spaces');
    }

    $rows[] = array($label, $types, $links);
  }

  $header = array(t('Feature'), t('Usable for'), t('Actions'));
  $output .= theme('table', $header, $rows);
  
  return $output;
}

/**
 * Custom form theming for spaces feature menu.
 */
function theme_spaces_ui_feature_form_menu($form) {
  drupal_add_js(drupal_get_path('module', 'spaces_ui') .'/spaces_ui.js');
  drupal_add_css(drupal_get_path('module', 'spaces_ui') .'/spaces.css');

  // Render help markup first
  $output = drupal_render($form['help']);

  // Render menu items in a table
  $rows = array();
  foreach (element_children($form) as $element) {
    if (is_numeric($element)) {
      $class = !$form[$element]['title']['#default_value'] ? 'hidden' : '';
      $rows[] = array(
        'data' => array(
          drupal_render($form[$element]['title']),
          drupal_render($form[$element]['path']),
          l(t('Remove'), $_GET['q'], array('class' => 'spaces-remove-menu')),
        ),
        'class' => $class,
      );
    }
  }

  // Add an ajax button
  $rows[] = array(
    array(
      'data' => l(t('Add menu item'), $_GET['q'], array('class' => 'button spaces-add-menu')),
      'colspan' => 3,
      'class' => 'actions',
    ),
  );

  $output .= theme('table', array(t('Title'), t('Path'), ''), $rows, array('class' => 'spaces-admin'));
  return $output;
}

?>