<?php
// $Id$


/**
 * @file contexts/node.inc
 *
 * Plugin to provide a node context
 */

function panels_node_panels_contexts() {
  $args['node'] = array(
    'title' => t("Node"),
    'description' => t('A node object.'),
    'context' => 'panels_context_create_node',
    'settings form' => 'panels_context_node_settings_form',
    'settings form validate' => 'panels_context_node_settings_form_validate',
    'settings form submit' => 'panels_context_node_settings_form_submit',
'keyword' => 'node',
    'context name' => 'node',
  );
  return $args;
}

/**
 * It's important to remember that $conf is optional here, because contexts
 * are not always created from the UI.
 */
function panels_context_create_node($empty, $data = NULL, $conf = FALSE) {
  $context = new panels_context('node');
  $context->plugin = 'node';

  if ($empty) {
    return $context;
  }

  if ($conf) {
    $nid = $data['nid'];

    if (module_exists('translation')) {
       if ($translation = module_invoke('translation', 'node_nid', $nid, $GLOBALS['locale'])) {
        $nid = $translation;
      }
    }

    $data = node_load($nid);
  }

  if (!empty($data)) {
    $context->data     = $data;
    $context->title    = $data->title;
    $context->argument = $data->nid;
    return $context;
  }
}

function panels_context_node_settings_form($conf, $external = FALSE) {
  if ($external) {
    $form['external'] = array(
      '#type' => 'checkbox',
      '#default_value' => $conf['external'],
      '#title' => t('Require this context from an external source (such as a containing panel page).'),
      '#description' => t('If selected, node selection (below) will be ignored.'),
    );
  }

  $form['node'] = array(
    '#prefix' => '<div class="no-float">',
    '#suffix' => '</div>',
    '#title' => t('Enter the title or NID of a post'),
    '#type' => 'textfield',
    '#maxlength' => 512,
    '#autocomplete_path' => 'panels/node/autocomplete',
    '#weight' => -10,
  );

  if (!empty($conf['nid'])) {
    $info = db_fetch_object(db_query("SELECT * FROM {node} n WHERE n.nid = %d", $conf['nid']));
    if ($info) {
      $link = l("'$info->title' [node id: $info->nid]", "node/$info->nid", array('target' => '_blank', 'title' => t('Open in new window')));
      $form['node']['#description'] = t('Currently set to !link', array('!link' => $link));
    }
  }

  $form['nid'] = array(
    '#type' => 'value',
    '#value' => $conf['nid'],
  );

  $form['set_identifier'] = array(
    '#type' => 'checkbox',
    '#default_value' => FALSE,
    '#title' => t('Reset identifier to node title'),
    '#description' => t('If checked, the identifier will be reset to the node title of the selected node.'),
  );

  return $form;
}

/**
 * Validate a node.
 */
function panels_context_node_settings_form_validate($form, &$form_values) {
  // Validate the autocomplete
  if (empty($form_values['external']) && empty($form_values['nid']) && empty($form_values['node'])) {
    form_error($form['node'], t('You must select a node.'));
    return;
  }

  if (empty($form_values['node'])) {
    return;
  }

  $nid = $form_values['node'];
  $preg_matches = array();
  $match = preg_match('/\[nid: (\d+)\]/', $nid, $preg_matches);
  if (!$match) {
    $match = preg_match('/^nid: (\d+)/', $nid, $preg_matches);
  }

  if ($match) {
    $nid = $preg_matches[1];
  }
  if (is_numeric($nid)) {
    $node = db_fetch_object(db_query(db_rewrite_sql("SELECT n.nid FROM {node} n WHERE n.nid = %d"), $nid));
  }
  else {
    $node = db_fetch_object(db_query(db_rewrite_sql("SELECT n.nid FROM {node} n WHERE LOWER(n.title) = LOWER('%s')"), $nid));
  }

  if (!$node) {
    form_error($form['node'], t('Invalid node selected.'));
  }
  else {
    $form_values['nid'] = $node->nid;
  }
}

function panels_context_node_settings_form_submit($form, &$form_values, &$form_state) {
  if ($form_values['set_identifier']) {
    $node = node_load($form_values['nid']);
    $form_state['values']['context']['identifier'] = $node->title;
  }

  // Don't let this be stored.
  unset($form_values['set_identifier']);
}