<?php

/**
 * @file
 * Primarily Drupal hooks.
 */

// Include the slider functions
include_once('includes/nivo_slider_slider.inc');

/**
 * Implements hook_requirements().
 */
function nivo_slider_requirements($phase) {
  // Create an array to hold Nivo Slider 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('nivo-slider')) && !empty($library['installed'])) {
      $requirements['nivo_slider_library'] = array(
        'title' => t('Nivo Slider jQuery plugin'),
        'value' => t('Installed'),
        'severity' => REQUIREMENT_OK,
      );
    }
    else {
      $requirements['nivo_slider_library'] = array(
        'title' => t('Nivo Slider 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')) && version_compare($library['version'], 1.7) >= 0) {
      $requirements['nivo_slider_jquery'] = array(
        'title' => t('Nivo Slider jQuery version'),
        'value' => t('jQuery @version', array('@version' => $library['version'])),
        'severity' => REQUIREMENT_OK,
      );
    }
    else {
      $destination = drupal_get_destination();

      $requirements['nivo_slider_jquery'] = array(
        'title' => t('Nivo Slider jQuery version'),
        'value' => t('jQuery @version', array('@version' => $library['version'])),
        'description' => t('Nivo Slider 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_permission().
 */
function nivo_slider_permission() {
  return array(
    'administer nivo slider' => array(
      'title' => t('Administer Nivo Slider'),
      'description' => t('Allows a user to configure Nivo Slider.'),
    ),
  );
}

/**
 * Implements hook_menu().
 */
function nivo_slider_menu() {
  $items['admin/structure/nivo-slider'] = array(
    'title' => 'Nivo Slider',
    'description' => 'Configure slider content and options.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('nivo_slider_slide_configuration_form'),
    'access arguments' => array('administer nivo slider'),
    'file' => 'nivo_slider_slides.admin.inc',
    'type' => MENU_NORMAL_ITEM,
  );
  $items['admin/structure/nivo-slider/slides'] = array(
    'title' => 'Slides',
    'description' => 'Configure slider content.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('nivo_slider_slide_configuration_form'),
    'access arguments' => array('administer nivo slider'),
    'file' => 'nivo_slider_slides.admin.inc',
    'type' => MENU_DEFAULT_LOCAL_TASK,
    'weight' => 1,
  );
  $items['admin/structure/nivo-slider/options'] = array(
    'title' => 'Options',
    'description' => 'Configure slider options.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('nivo_slider_option_configuration_form'),
    'access arguments' => array('administer nivo slider'),
    'file' => 'nivo_slider_options.admin.inc',
    'type' => MENU_LOCAL_TASK,
    'weight' => 2,
  );

  return $items;
}

/**
 * Implements hook_help().
 */
function nivo_slider_help($path, $arg) {
  switch ($path) {
    case 'admin/help#nivo_slider':
      $output = '';
      $output .= '<p>' . t('<a href="@project_page">Nivo Slider</a> provides an easy and eye-catching way to showcase featured content.', array('@project_page' => 'http://drupal.org/project/nivo_slider')) . '</p>';
      $output .= '<h2>' . t('Usage') . '</h2>';
      $output .= '<p>' . t('Nivo Slider provides a block which will determine where the slider is placed. Administrators or users with the Administer Nivo Slider permission will be able to configure slider settings by visiting the <a href="nivo_slider">Nivo Slider</a> administration page.', array('@nivo_slider' => url('admin/structure/nivo-slider'))) . '</p>';
      $output .= '<h2>' . t('Configuration') . '</h2>';
      $output .= '<p>' . t('Nivo Slider provides two configuration pages: slides and options.') . '</p>';
      $output .= '<h3>' . t('Slides') . '</h3>';
      $output .= '<p>' . t('The <a href="@slides">slides</a> page provides an interface for managing the content of the slider. Slider content can be given a title or description, made into a link, reordered or restricted to displaying on a specific path.', array('@slides' => url('admin/structure/nivo-slider'))) . '</p>';
      $output .= '<h3>' . t('Options') . '</h3>';
      $output .= '<p>' . t('The <a href="@options">options</a> page provides an interface for configuring the slider. Slider options include general options, transitions and navigation.', array('@options' => url('admin/structure/nivo-slider/options'))) . '</p>';
      return $output;
    case 'admin/structure/nivo-slider':
      $output = '';
      $output .= '<p>' . t('Configure slider content.') . '</p>';
      return $output;
    case 'admin/structure/nivo-slider/slides':
      $output = '';
      $output .= '<p>' . t('Configure slider content.') . '</p>';
      return $output;
    case 'admin/structure/nivo-slider/options':
      $output = '';
      $output .= '<p>' . t('Configure slider options.') . '</p>';
      return $output;
  }
}

/**
 * Implements hook_contextual_links_view_alter().
 */
function nivo_slider_contextual_links_view_alter(&$element, &$items) {
  if (isset($element['#element']['#block']) && $element['#element']['#block']->delta == 'nivo_slider') {
    $element['#links']['slides'] = array(
      'title' => t('Configure slider slides'),
      'href' => 'admin/structure/nivo-slider/slides',
    );
    $element['#links']['options'] = array(
      'title' => t('Configure slider options'),
      'href' => 'admin/structure/nivo-slider/options',
    );
  }
}

/**
 * Implements hook_i18n_string_info()
 */
function nivo_slider_i18n_string_info() {
  $groups['nivo_slider'] = array(
    'title' => t('Nivo Slider'),
    'description' => t('Slide titles and descriptions.'),
    'format' => TRUE,
    'list' => FALSE,
    'refresh callback' => 'nivo_slider_locale_refresh',
  );

  return $groups;
}

/**
 * Implements hook_i18n_string_refresh()
 */
function nivo_slider_i18n_string_refresh() {
  nivo_slider_locale_refresh();
  return true;
}

/**
 * Update / create translation source for user defined slide strings.
 *
 * @param $slides
 *   An array of slider slides.
 */
function nivo_slider_locale_refresh($slides = NULL) {
  if (!isset($slides)) {
    $slides = variable_get('nivo_slider_banner_settings', array());
  }

  foreach ($slides as $slide => $settings) {
    foreach ($settings as $setting => $value) {
      switch ($setting) {
        case 'title':
          i18n_string_update('nivo_slider:slide:' . $slide . ':title', $value);
          break;
        case 'description':
          i18n_string_update('nivo_slider:slide:' . $slide . ':description', $value['value'], array('format' => $value['format']));
          break;
      }
    }
  }
}

/**
 * Translates a user defined slide string.
 *
 * @param $name
 *   Location glued with ':'.
 * @param $string
 *   String in default language. Default language may or may not be English.
 * @param $langcode
 *  The language code if it is different from the page request one.
 * @param $textgroup
 *  Textgroup.
 *
 * @return $string
 *   Translated string, $string if not found.
 */
function nivo_slider_translate($name, $string, $langcode = NULL, $textgroup = 'nivo_slider') {
  return function_exists('i18n_string') ? i18n_string($textgroup . ':' . $name, $string, array('langcode' => $langcode)) : $string;
}

/**
 * Implements hook_theme().
 */
function nivo_slider_theme($existing, $type, $theme, $path) {
  return array(
    'nivo_slider_slide_configuration_form' => array(
      'render element' => 'form',
      'file' => 'nivo_slider.theme.inc',
      'path' => $path . '/themes',
    ),
    'nivo_slider_wrapper' => array(
      'variables' => array(
        'theme' => NULL,
        'banners' => NULL,
      ),
      'file' => 'nivo_slider.theme.inc',
      'path' => $path . '/themes',
      'template' => 'nivo-slider-wrapper',
    ),
  );
}

/**
 * Implements hook_libraries_info().
 */
function nivo_slider_libraries_info() {
  $libraries['nivo-slider'] = array(
    'name' => 'Nivo Slider',
    'vendor url' => 'http://nivo.dev7studios.com',
    'download url' => 'http://nivo.dev7studios.com/pricing',
    'version arguments' => array(
      'file' => 'jquery.nivo.slider.pack.js',
      // 3.x: jQuery Nivo Slider v3.1
      'pattern' => '/jQuery Nivo Slider v(\d+\.+\d+)/',
      'lines' => 2,
    ),
    'files' => array(
      'js' => array(
        'jquery.nivo.slider.pack.js',
      ),
      'css' => array(
        'nivo-slider.css',
      ),
    ),
  );

  return $libraries;
}

/**
 * Implements hook_hook_info().
 */
function nivo_slider_hook_info() {
  $hooks['nivo_slider_theme_info'] = array(
    'group' => 'nivo_slider',
  );
  $hooks['nivo_slider_theme_info_alter'] = array(
    'group' => 'nivo_slider',
  );

  return $hooks;
}

/**
 * Implements hook_block_info().
 */
function nivo_slider_block_info() {
  $blocks['nivo_slider'] = array(
    'info' => t('Nivo Slider'),
    'cache' => DRUPAL_CACHE_PER_PAGE,
    'status' => 1,
    'region' => 'featured',
  );

  return $blocks;
}

/**
 * Implements hook_block_view().
 */
function nivo_slider_block_view($delta = '') {
  switch ($delta) {
    case 'nivo_slider':
      $block['content'] = array(
        '#type' => 'markup',
        '#theme' => 'nivo_slider_wrapper',
        '#attached' => array(
          'libraries_load' => array(
            array('nivo-slider'),
          ),
          'js' => array(
            array(
              'data' => drupal_get_path('module', 'nivo_slider') . '/js/nivo_slider.js',
              'type' => 'file',
            ),
            array(
              'data' => array(
                'nivo_slider' => array(
                  'effect' => check_plain(variable_get('nivo_slider_effect', 'random')),
                  'slices' => (int) check_plain(variable_get('nivo_slider_slices', '15')),
                  'boxCols' => (int) check_plain(variable_get('nivo_slider_box_columns', '8')),
                  'boxRows' => (int) check_plain(variable_get('nivo_slider_box_rows', '4')),
                  'animSpeed' => (int) check_plain(variable_get('nivo_slider_animation_speed', '500')),
                  'pauseTime' => (int) check_plain(variable_get('nivo_slider_pause_time', '3000')),
                  'startSlide' => (int) check_plain(variable_get('nivo_slider_start_slide', '0')),
                  'directionNav' => check_plain(variable_get('nivo_slider_directional_navigation', 1)) == 1 ? TRUE : FALSE,
                  'controlNav' => check_plain(variable_get('nivo_slider_control_navigation', 1)) == 1 ? TRUE : FALSE,
                  'controlNavThumbs' => check_plain(variable_get('nivo_slider_control_nav_thumbs', 0)) == 1 ? TRUE : FALSE,
                  'pauseOnHover' => check_plain(variable_get('nivo_slider_pause_on_hover', 1)) == 1 ? TRUE : FALSE,
                  'manualAdvance' => check_plain(variable_get('nivo_slider_manual_advance', 0)) == 1 ? TRUE : FALSE,
                  'prevText' => check_plain(variable_get('nivo_slider_previous_text', t('Prev'))),
                  'nextText' => check_plain(variable_get('nivo_slider_next_text', t('Next'))),
                  'randomStart' => check_plain(variable_get('nivo_slider_random_start', 0)) == 1 ? TRUE : FALSE,
                ),
              ),
              'type' => 'setting',
            ),
          ),
          'css' => array(),
        ),
      );

      // Collect all themes
      $themes = module_invoke_all('nivo_slider_theme_info');

      // Allow theme information to be altered
      drupal_alter('nivo_slider_theme_info', $themes);

      // Find the currently selected theme
      $current_theme = variable_get('nivo_slider_theme', 'default');

      // Get the current theme's settings
      $theme = $themes[$current_theme];

      // Add the theme's resources
      foreach (array('js', 'css') as $type) {
        if (!empty($theme['resources'][$type])) {
          foreach ($theme['resources'][$type] as $file_path) {
            $block['content']['#attached'][$type][] = $file_path;
          }
        }
      }
      break;
  }

  return $block;
}