<?php

/**
 * @file
 * This file contains all install related hooks.
 */

/**
 * Implements hook_requirements().
 */
function islandora_requirements($phase) {
  $requirements = array();

  // Ensure translations don't break at install time.
  $t = get_t();

  if (!class_exists('XSLTProcessor', FALSE)) {
    $requirements['islandora_xsltprocessor']['title'] = $t('Islandora XSLTProcessor Prerequisite');
    $requirements['islandora_xsltprocessor']['value'] = $t('Not installed');
    $link = l($t('PHP XSL extension'), 'http://us2.php.net/manual/en/book.xsl.php', array('attributes' => array('target' => '_blank')));
    $requirements['islandora_xsltprocessor']['description'] = $t('The !xsllink is required. Check your installed PHP extensions and php.ini file.', array('!xsllink' => $link));
    $requirements['islandora_xsltprocessor']['severity'] = REQUIREMENT_ERROR;
  }

  return $requirements;
}

/**
 * Implements hook_install().
 *
 * @see islandora_islandora_required_objects()
 */
function islandora_install() {
  module_load_include('inc', 'islandora', 'includes/solution_packs');
  islandora_install_solution_pack('islandora');
}

/**
 * Implements hook_uninstall().
 *
 * @see islandora_islandora_required_objects()
 */
function islandora_uninstall() {
  module_load_include('inc', 'islandora', 'includes/solution_packs');
  islandora_install_solution_pack('islandora', 'uninstall');
  // Add new variables to clean up.
  $variables = array(
    'islandora_ds_replace_exclude_enforced',
    'islandora_defer_derivatives_on_ingest',
    'islandora_base_url',
    'islandora_repository_pid',
    'islandora_use_datastream_cache_headers',
    'islandora_show_print_option',
    'islandora_render_drupal_breadcrumbs',
    'islandora_namespace_restriction_enforced',
    'islandora_pids_allowed',
    'islandora_risearch_use_itql_when_necessary',
    'islandora_use_object_semaphores',
    'islandora_semaphore_period',
    'islandora_require_obj_upload',
    'islandora_breadcrumbs_backends',
    'islandora_render_context_ingeststep',
    'islandora_deny_inactive_and_deleted',
    'islandora_imageserver_settings',
  );
  array_walk($variables, 'variable_del');
}

/**
 * Implements hook_schema().
 */
function islandora_schema() {
  $schema['islandora_authtokens'] = array(
    'description' => 'The hub for all islandora authentication tokens',
    'fields' => array(
      'id' => array(
        'description' => 'key',
        'type' => 'serial',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'token' => array(
        'description' => 'a unique identifier for this token',
        'type' => 'varchar',
        'length' => 64,
      ),
      'remaining_uses' => array(
        'description' => 'How many uses until this should be removed',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'uid' => array(
        'description' => 'the user id that requested this token',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'time' => array(
        'description' => 'when this token was created',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'pid' => array(
        'description' => 'the pid of the object this token unlocks',
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
      ),
      'dsid' => array(
        'description' => 'the datasteram id of the object this token unlocks',
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
      ),
    ),
    'unique keys' => array(
      'id' => array('id'),
    ),
    'primary key' => array('id'),
  );
  return $schema;
}

/**
 * Implements hook_update_N().
 *
 * Add the required table for handling authentication tokens.
 * This is the first instance that has this table.
 */
function islandora_update_7001(&$sandbox) {
  drupal_install_schema('islandora');
  $t = get_t();
  return $t("Islandora database updates complete");
}

/**
 * Implements hook_update_N().
 *
 * Removing old variable around changes to ingestDatastream signature.
 * These changes are complete and deprecation warnings are removed.
 */
function islandora_update_7002() {
  // Removing as the deprecation has been removed.
  variable_del('islandora_deprecation_return_false_when_datastream_exists');
}

/**
 * Implements hook_update_N().
 *
 * Try to auto-configure the image server settings in core based on
 * the Internet Archive Bookreader and/or Openseadragon settings.
 */
function islandora_update_7003() {
  module_load_include('inc', 'islandora', 'includes/imageserver');
  if (islandora_imageserver_get_settings()['type'] != 'none') {
    return t('Settings have already been configured manually.');
  }
  if (module_exists('islandora_openseadragon')) {
    $openseadragon_settings = array(
      'type' => variable_get('islandora_openseadragon_tilesource', 'djatoka'),
    );
    if ($openseadragon_settings['type'] == 'djatoka') {
      $openseadragon_settings['url'] = variable_get('islandora_openseadragon_djatoka_url', 'adore-djatoka/resolver');
    }
    else {
      $openseadragon_settings['url'] = variable_get('islandora_openseadragon_iiif_url', 'iiif');
      $openseadragon_settings['iiif_token_header'] = variable_get('islandora_openseadragon_iiif_token_header', FALSE);
      $openseadragon_settings['iiif_identifier'] = explode(":", variable_get('islandora_openseadragon_iiif_identifier', '[islandora_openseadragon:url_token]'))[1];
    }
  }
  if (module_exists('islandora_internet_archive_bookreader')) {
    $iabv_settings = array(
      'type' => variable_get('islandora_internet_archive_bookreader_pagesource', 'djatoka'),
    );
    if ($iabv_settings['type'] == 'djatoka') {
      $iabv_settings['url'] = variable_get('islandora_paged_content_djatoka_url', 'http://localhost:8080/adore-djatoka');
    }
    else {
      $iabv_settings['url'] = variable_get('islandora_internet_archive_bookreader_iiif_url', 'iiif');
      $iabv_settings['iiif_token_header'] = variable_get('islandora_internet_archive_bookreader_iiif_token_header', FALSE);
      $iabv_settings['iiif_identifier'] = explode(":", variable_get('islandora_internet_archive_bookreader_iiif_identifier', '[islandora_iareader:url_token]'))[1];
    }
  }
  if (isset($openseadragon_settings) && isset($iabv_settings)) {
    if (count(array_diff($openseadragon_settings, $iabv_settings)) == 0) {
      // Settings are the same, use for core imageserver variables.
      $new_settings = $openseadragon_settings;
    }
    else {
      // We could not migrate your settings to the new place. This stops the other
      // two modules from deleting your settings.
      throw new DrupalUpdateException('Islandora image server settings could NOT be configured automatically, please set them manually at Admin -> Islandora -> Image Server configuration and then run updates again.');
    }
  }
  elseif (isset($openseadragon_settings)) {
    $new_settings = $openseadragon_settings;
  }
  elseif (isset($iabv_settings)) {
    $new_settings = $iabv_settings;
  }
  if (isset($new_settings)) {
    if (isset($new_settings['iiif_identifer']) && !empty($new_settings['iiif_identifer'])) {
      // This will only have the back half of the token, prepend islandora to it.
      $new_settings['iiif_identifer'] = "[islandora:" + $new_settings['iiif_identifer'];
    }
    if ($new_settings['type'] == 'djatoka' && !preg_match('~resolver$~', $new_settings['url'])) {
      // IABV javascript added resolver to URL, Openseadragon did not.
      $new_settings['url'] = rtrim($new_settings['url'], '/') . '/resolver';
    }
    // We have migrated your settings to the new place.
    variable_set('islandora_imageserver_settings', $new_settings);
    return t("Islandora image server settings configured automatically.");
  }
}