<?php
/**
 * @file
 * Primarily Drupal hooks.
 */

/**
 * Implements hook_help()
 */
function bxslider_help($path, $arg) {
  switch ($path) {
    case 'admin/help#bxslider':
      $output = '';
      $output .= '<p>' . t('The bxSlider module allows you to add contents slider to your web site using bxSlider jQuery plugin.') . '</p>';
      $output .= '<p>' . t('To use bxSlider, you need to upload images to be used for a slider to the site first.') . '</p>';
      $output .= '<p>' . t('Assuming you have the following images uploadedas examples.'). '<ul><li>/sites/default/files/slider/photo1.jpg</li><li>/sites/default/files/slider/photo2.jpg</li><li>/sites/default/files/slider/photo3.jpg</li></ul>' . '</p>';
      $output .= '<p>' . t('Next, just add the following code anywhere (in block, node, etc) you like to show a slider') . '</p>';
      $output .= '<p style="font-family: monospace; font-size: 13px;">' . 
'&lt;ul class="bxslider"&gt;<br/>
  &nbsp;&nbsp;&lt;li>&lt;img src="/sites/default/files/slider/photo1.jpg" /&gt;&lt;/li&gt;<br/>
  &nbsp;&nbsp;&lt;li>&lt;img src="/sites/default/files/slider/photo2.jpg" /&gt;&lt;/li&gt;<br/>
  &nbsp;&nbsp;&lt;li>&lt;img src="/sites/default/files/slider/photo3.jpg" /&gt;&lt;/li&gt;<br/>
&lt;/ul&gt;' . '</p>';
      $output .= '<p>' . t('That\'s all. Be sure to use the class name "bxslider" for the UL tag. You can put as many sliders as possible even within a page.') . '</p>';

      return $output;
  }
}


/**
 * Implements hook_requirements().
 */
function bxslider_requirements($phase) {
  // Create an array to hold bxSlider requirements
  $requirements = array();

  // Check requirements during the runtime phase
  if ($phase == 'runtime') {
    // Check if the Nivo Slider jQuery plugin library is installed
    if (($library = libraries_detect('bxslider')) && !empty($library['installed'])) {
      $requirements['bxslider'] = array(
        'title' => t('bxSlider jQuery plugin'),
        'value' => t('Installed'),
        'severity' => REQUIREMENT_OK,
      );
    }
    else {
      $requirements['bxslider'] = array(
        'title' => t('bxSlider jQuery plugin'),
        'value' => t('Not installed'),
        'description' => $library['error message'],
        'severity' => REQUIREMENT_ERROR,
      );
    }
    // Check if the site is running >= jQuery 1.7
    if (($library = drupal_get_library('system', 'jquery')) && $library['version'] >= 1.7) {
      $requirements['bxslider_jquery'] = array(
        'title' => t('bxSlider jQuery version'),
        'value' => t('jQuery @version', array('@version' => $library['version'])),
        'severity' => REQUIREMENT_OK,
      );
    }
    else {
      $destination = drupal_get_destination();

      $requirements['bxslider_jquery'] = array(
        'title' => t('bxSlider jQuery version'),
        'value' => t('jQuery @version', array('@version' => $library['version'])),
        'description' => t('bxSlider requires jQuery 1.7 or greater. Configure <a href="@jquery_update">jQuery Update</a>.', array('@jquery_update' => url('admin/config/development/jquery_update', array('query' => $destination)))),
        'severity' => REQUIREMENT_ERROR,
      );
    }
  }

  return $requirements;
}

/**
 * Implements hook_init().
 */
function bxslider_init() {
  $settings['mode']     = variable_get('bxslider_mode', 'fade');
  $settings['speed']    = intval(variable_get('bxslider_speed', '1000'));
  $settings['pager']    = variable_get('bxslider_pager', 1)? true : false;
  $settings['controls'] = variable_get('bxslider_controls', 1)? true : false;
  $settings['auto']     = variable_get('bxslider_auto', 1)? true : false;
  $settings['pause']    = intval(variable_get('bxslider_pause', '4000'));
  bxslider_activate($settings);
}

/**
 * Implements hook_permission().
 */
function bxslider_permission() {
  return array(
    'administer bxslider' => array(
      'title' => t('Administer bxSlider'),
    ),
  );
}

/**
 * Implements hook_menu().
 */
function bxslider_menu() {
  $items['admin/config/media/bxslider'] = array(
    'title' => 'bxSlider',
    'description' => 'Configure bxSlider settings.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('bxslider_admin_settings_form'),
    'access arguments' => array('administer bxslider'),
    'type' => MENU_NORMAL_ITEM,
  );
  return $items;
}

/**
 * Display the bxSlider settings form.
 */
function bxslider_admin_settings_form($form, &$form_state) {

  $form['bxslider_mode'] = array(
    '#type' => 'select',
    '#title' => t('Slider effect'),
    '#default_value' => variable_get('bxslider_mode', 'fade'),
    '#description' => t('Select a slider effect'),
    '#options' => array(
      'horizontal' => t('Horizontal'), 
      'vertical'   => t('Vertical'), 
      'fade'       => t('Fade'),
    ),
  );
  $form['bxslider_speed'] = array(
    '#type' => 'textfield',
    '#title' => t('Transition duration'),
    '#default_value' => variable_get('bxslider_speed', '1000'),
    '#field_suffix' => t('ms'),
    '#maxlength' => 8,
    '#size' => 8,
  );
  $form['bxslider_pager'] = array(
    '#type' => 'radios',
    '#title' => t('Display pager'),
    '#default_value' => variable_get('bxslider_pager', 1),
    '#options' => array(t('No'), t('Yes')),
  ); 
  $form['bxslider_controls'] = array(
    '#type' => 'radios',
    '#title' => t('Display prev/next controls'),
    '#default_value' => variable_get('bxslider_controls', 1),
    '#options' => array(t('No'), t('Yes')),
  ); 
  $form['bxslider_auto'] = array(
    '#type' => 'radios',
    '#title' => t('Slides automatically'),
    '#default_value' => variable_get('bxslider_auto', 1),
    '#options' => array(t('No'), t('Yes')),
  ); 
  $form['bxslider_pause'] = array(
    '#type' => 'textfield',
    '#title' => t('Amount of time between each auto transition'),
    '#default_value' => variable_get('bxslider_pause', '4000'),
    '#field_suffix' => t('ms'),
    '#maxlength' => 8,
    '#size' => 8,
  );

  return system_settings_form($form);
}

/**
 * Implements hook_libraries_info().
 */
function bxslider_libraries_info() {
  $libraries['bxslider'] = array(
    'name' => 'bxSlider',
    'vendor url' => 'http://bxslider.com',
    'download url' => 'http://bxslider.com/lib/jquery.bxslider.zip',
    'version arguments' => array(
      'file' => 'jquery.bxslider.min.js',
      // BxSlider vx.x
      'pattern' => '/BxSlider v(\d+\.+\d+)/',
      'lines' => 2,
    ),
    'files' => array(
      'js' => array(
        'jquery.bxslider.min.js',
      ),
      'css' => array(
        'jquery.bxslider.css',
      ),
    ),
  );
  return $libraries;
}

/**
 * 
 */
function bxslider_activate($settings) {
  static $active = FALSE;

  if (!$active) {
    // load jQuery library and CSS
    $path = libraries_get_path('bxslider');
	drupal_add_css($path . '/jquery.bxslider.css');
    drupal_add_js($path . '/jquery.bxslider.min.js');

    // load bxSlider activator
    drupal_add_js(array('bxslider' => $settings), 'setting');
    drupal_add_js(drupal_get_path('module', 'bxslider') . '/js/bxslider.js');

    $active = TRUE;
  }
}