psu_search.module

<?php

/**
 * @file
 * Shows Penn State Search block for Drupal
 */

global $DEFAULT_ENGINES;
$DEFAULT_ENGINES = array(
  'this_site' => 'This Site',
  'penn_state' => 'Penn State',
  'people' => 'People',
  'departments' => 'Departments'
);

/**
 * Implements hook_page_build.
 * Used to insert required JS and CSS files for Search into the page's head.
 */
function psu_search_page_build() {
  if (variable_get('psu_search_settings_css') == 1) {
    drupal_add_css( drupal_get_path( 'module', 'psu_search') . '/css/search_block.css' );
  }
  if (variable_get('psu_search_settings_js') == 1) {
    drupal_add_js( drupal_get_path( 'module', 'psu_search') . '/js/search_box.js' );
  }
}

/**
 * Implements hook_block_info().
 */
function psu_search_block_info() {
  $blocks['psu_search'] = array(
    'info' => t('Penn State Search block'),
    'cache' => DRUPAL_CACHE_GLOBAL,
  );

  return $blocks;
}

/**
 * Implements hook_block_configure().
 */
function psu_search_block_configure($delta = '') {
  $form = array();
  if ($delta == 'psu_search') {
    $form['psu_search_settings_placeholder'] = array(
      '#type' => 'textfield',
      '#title' => t('Placeholder Text'),
      '#default_value' => variable_get('psu_search_settings_placeholder'),
      '#description' => t('Set the default placeholder text for the search box.')
    );
    $form['psu_search_settings_show'] = array(
      '#type' => 'checkboxes',
      '#title' => t('Search Engines to Display'),
      '#default_value' => variable_get('psu_search_settings_show'),
      '#options' => $GLOBALS['DEFAULT_ENGINES'],
      '#description' => t('Choose which search engines to display in the dropdown.')
    );
    $form['psu_search_settings_thissiteurl'] = array(
      '#type' => 'textfield',
      '#title' => t('This Site Engine URL'),
      '#default_value' => variable_get('psu_search_settings_thissiteurl'),
      '#description' => t('Set a custom URL for the action of the This Site search engine.')
    );
    $form['psu_search_settings_css'] = array(
      '#type' => 'checkbox',
      '#title' => t('Default Styling'),
      '#default_value' => variable_get('psu_search_settings_css'),
      '#description' => t('Enable default styling for Penn State branding.')
    );
    $form['psu_search_settings_js'] = array(
      '#type' => 'checkbox',
      '#title' => t('Default Interaction'),
      '#default_value' => variable_get('psu_search_settings_js'),
      '#description' => t('Enable default javascript for show and hiding events.')
    );
  }
  return $form;
}

/**
 * Implements hook_block_save().
 *
 * Save the variable sets
 */
function psu_search_block_save($delta = '', $edit = array()) {
  if ($delta == 'psu_search') {
    variable_set('psu_search_settings_show', $edit['psu_search_settings_show']);
    variable_set('psu_search_settings_placeholder', $edit['psu_search_settings_placeholder']);
    variable_set('psu_search_settings_thissiteurl', $edit['psu_search_settings_thissiteurl']);
    variable_set('psu_search_settings_css', $edit['psu_search_settings_css']);
    variable_set('psu_search_settings_js', $edit['psu_search_settings_js']);
  }
}

/**
 * Implements hook_block_view().
 */
function psu_search_block_view($delta = '') {
  switch($delta){
    case 'psu_search':
      $block['subject'] = t('Search');
      $block['content'] = drupal_get_form('psu_search_form');
      return $block;
    break;
  }
}

function psu_search_form($form, &$form_state) {
  $form['search']['textfield'] = array(
    '#type' => 'textfield',
    '#title' => t('Search'),
    '#attributes' => array('placeholder' => variable_get('psu_search_settings_placeholder', NULL)),
    '#size' => 30,
  );

  $form['search']['options'] = array(
    '#type' => 'radios',
    '#title' => t('Options'),
    '#options' => _psu_search_filter_options(variable_get('psu_search_settings_show'), $GLOBALS['DEFAULT_ENGINES']),
    '#default_value' => _psu_search_get_first_value(variable_get('psu_search_settings_show')),
  );

  $form['search']['submit'] = array(
    '#type' => 'submit',
    '#value' => t('Submit')
  );
  return $form;
}

function psu_search_form_submit($form, &$form_state) {
  $searchtext = $form_state['values']['textfield'];
  $option = $form_state['values']['options'];

  switch ($option) {
    case 'this_site':
      $url = variable_get('psu_search_settings_thissiteurl');
      drupal_goto($url . '/' . $searchtext);
      break;
    case 'penn_state':
      drupal_goto('http://www.psu.edu/search/gss?query=' . $searchtext);
      break;
    case 'people':
      drupal_goto('http://www.psu.edu/search/people/' . $searchtext);
      break;
    case 'departments':
      drupal_goto('http://www.psu.edu/search/department/' . $searchtext);
      break;
    default:
      drupal_goto('http://www.psu.edu/search/gss?query=' . $searchtext);
      break;
  }
}

/**
 * Helper function to turn a vget options array into a
 * nice options array with proper key, value pairs.
 *
 * @param  [array] $vget_options     Options from the vget function
 * @param  [array] $original_options The original list from the vset function
 * @return [array]                   Filtered list with nice key, value pairs
 */
function _psu_search_filter_options($vget_options, $original_options) {
  $options = array();
  $vget_options = array_filter($vget_options);
  $options = array_intersect_key($original_options, $vget_options);

  return $options;
}

/**
 * Return the first key of an array
 */
function _psu_search_get_first_key($array) {
  reset($array); // make sure array pointer is at first element
  $firstkey = key($array);

  return $firstkey;
}

/**
 * Return the first value of an array
 */
function _psu_search_get_first_value($array) {
  reset($array); // make sure array pointer is at first element
  $firstvalue = current($array);

  return $firstvalue;
}