<?php

/**
 * @file
 * Schema definitions install/update/uninstall hooks.
 */

/**
 * Implements hook_requirements().
 */
function feeds_requirements($phase) {
  $t = get_t();

  $requirements = array(
    'simplexml' => array(
      'title' => $t('SimpleXML'),
      'value' => extension_loaded('SimpleXML') ? $t('Enabled') : $t('Disabled'),
      'description' => $t('SimpleXML PHP module is required for Feeds Syndication Parser.'),
      'severity' => REQUIREMENT_INFO,
    ),
    'simplepie' => array(
      'title' => $t('SimplePie'),
      'value' => $t('Unknown at install time.'),
      'description' => $t('SimplePie library is required for Feeds SimplePie Parser.'),
      'severity' => REQUIREMENT_INFO,
    )
  );
  if ($phase == 'runtime') {
    // Check for SimpleXML, required by FeedsSyndicationParser.
    if (extension_loaded('SimpleXML')) {
      $requirements['simplexml']['severity'] = REQUIREMENT_OK;
    }
    else {
      $requirements['simplexml']['severity'] = REQUIREMENT_WARNING;
      $requirements['simplexml']['description'] .= ' ' . t('It has been disabled at compile time, seek instructions from the server mantainers to enable it.');
    }
    // Check for SimplePie, required by FeedsSimplePieParser.
    if (feeds_simplepie_exists()) {
      $requirements['simplepie']['value'] = t('Enabled');
      $requirements['simplepie']['severity'] = REQUIREMENT_OK;
    }
    else {
      $requirements['simplepie']['value'] = t('Not installed');
      $requirements['simplepie']['severity'] = REQUIREMENT_WARNING;
      $requirements['simplepie']['description'] .= ' ' . t(
        'Download the compiled version of the library from <a href="@simplepie-download-url">SimplePie download page</a>.',
        array('@simplepie-download-url' => 'http://simplepie.org/downloads/')
      );
    }
  }
  return $requirements;
}

/**
  * Implement hook_uninstall()
  */
function feeds_uninstall() {
  variable_del('http_request_timeout');
}

/**
 * Implements hook_schema().
 */
function feeds_schema() {
  $schema = array();

  $schema['feeds_importer'] = array(
    'description' => 'Configuration of feeds objects.',
    'export' => array(
      'key' => 'id',
      'identifier' => 'feeds_importer',
      'default hook' => 'feeds_importer_default',  // Function hook name.
      'api' => array(
        'owner' => 'feeds',
        'api' => 'feeds_importer_default',  // Base name for api include files.
        'minimum_version' => 1,
        'current_version' => 1,
      ),
    ),
    'fields' => array(
      'id' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Id of the fields object.',
      ),
      'config' => array(
        'type' => 'blob',
        'size' => 'big',
        'not null' => FALSE,
        'description' => 'Configuration of the feeds object.',
        'serialize' => TRUE,
      ),
    ),
    'primary key' => array('id'),
  );
  $schema['feeds_source'] = array(
    'description' => 'Source definitions for feeds.',
    'fields' => array(
      'id' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Id of the feed configuration.',
      ),
      'feed_nid' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'unsigned' => TRUE,
        'description' => 'Node nid if this particular source is attached to a feed node.',
      ),
      'config' => array(
        'type' => 'blob',
        'size' => 'big',
        'not null' => FALSE,
        'description' => 'Configuration of the source.',
        'serialize' => TRUE,
      ),
      'source' => array(
        'type' => 'text',
        'not null' => TRUE,
        'description' => 'Main source resource identifier. E. g. a path or a URL.',
      ),
      'state' => array(
        'type' => 'blob',
        'size' => 'big',
        'not null' => FALSE,
        'description' => 'State of import or clearing batches.',
        'serialize' => TRUE,
      ),
      'fetcher_result' => array(
        'type' => 'blob',
        'size' => 'big',
        'not null' => FALSE,
        'description' => 'Cache for fetcher result.',
        'serialize' => TRUE,
      ),
      'imported' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'unsigned' => TRUE,
        'description' => 'Timestamp when this source was imported last.',
      ),
    ),
    'primary key' => array('id', 'feed_nid'),
    'indexes' => array(
      'id' => array('id'),
      'feed_nid' => array('feed_nid'),
      'id_source' => array('id', array('source', 128)),
    ),
  );
  $schema['feeds_item'] = array(
    'description' => 'Tracks items such as nodes, terms, users.',
    'fields' => array(
      'entity_type' => array(
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The entity type.',
      ),
      'entity_id' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => 'The imported entity\'s serial id.',
      ),
      'id' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The id of the importer that created this item.',
      ),
      'feed_nid' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => 'Node id of the source, if available.',
      ),
      'imported' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Import date of the feed item, as a Unix timestamp.',
      ),
      'url' => array(
        'type' => 'text',
        'not null' => TRUE,
        'description' => 'Link to the feed item.',
      ),
      'guid' => array(
        'type' => 'text',
        'not null' => TRUE,
        'description' => 'Unique identifier for the feed item.'
      ),
      'hash' => array(
        'type' => 'varchar',
        'length' => 32, // The length of an MD5 hash.
        'not null' => TRUE,
        'default' => '',
        'description' => 'The hash of the source item.',
      ),
    ),
    'primary key' => array('entity_type', 'entity_id'),
    'indexes' => array(
      'id' => array('id'),
      'feed_nid' => array('feed_nid'),
      'lookup_url' => array('entity_type', 'id', 'feed_nid', array('url', 128)),
      'lookup_guid' => array('entity_type', 'id', 'feed_nid', array('guid', 128)),
      'global_lookup_url' => array('entity_type', array('url', 128)),
      'global_lookup_guid' => array('entity_type', array('guid', 128)),
      'imported' => array('imported'),
    ),
  );
  $schema['feeds_push_subscriptions'] = array(
    'description' => 'PubSubHubbub subscriptions.',
    'fields' => array(
      'domain' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Domain of the subscriber. Corresponds to an importer id.',
      ),
      'subscriber_id' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'unsigned' => TRUE,
        'description' => 'ID of the subscriber. Corresponds to a feed nid.',
      ),
      'timestamp' => array(
        'type' => 'int',
        'unsigned' => FALSE,
        'default' => 0,
        'not null' => TRUE,
        'description' => 'Created timestamp.',
      ),
      'hub' => array(
        'type' => 'text',
        'not null' => TRUE,
        'description' => 'The URL of the hub endpoint of this subscription.',
      ),
      'topic' => array(
        'type' => 'text',
        'not null' => TRUE,
        'description' => 'The topic URL (feed URL) of this subscription.',
      ),
      'secret' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Shared secret for message authentication.',
      ),
      'status' => array(
        'type' => 'varchar',
        'length' => 64,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Status of subscription.',
      ),
      'post_fields' => array(
        'type' => 'text',
        'not null' => FALSE,
        'description' => 'Fields posted.',
        'serialize' => TRUE,
      ),
    ),
    'primary key' => array('domain', 'subscriber_id'),
    'indexes' => array(
      'timestamp' => array('timestamp'),
    ),
  );
  $schema['feeds_log'] = array(
    'description' => 'Table that contains logs of feeds events.',
    'fields' => array(
      'flid' => array(
        'type' => 'serial',
        'not null' => TRUE,
        'description' => 'Primary Key: Unique feeds event ID.',
      ),
      'id' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The id of the importer that logged the event.',
      ),
      'feed_nid' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => 'Node id of the source, if available.',
      ),
      'log_time' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Unix timestamp of when event occurred.',
      ),
      'request_time' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Unix timestamp of the request when the event occurred.',
      ),
      'type' => array(
        'type' => 'varchar',
        'length' => 64,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Type of log message, for example "feeds_import"."',
      ),
      'message' => array(
        'type' => 'text',
        'not null' => TRUE,
        'size' => 'big',
        'description' => 'Text of log message to be passed into the t() function.',
      ),
      'variables' => array(
        'type' => 'blob',
        'not null' => TRUE,
        'size' => 'big',
        'description' => 'Serialized array of variables that match the message string and that is passed into the t() function.',
      ),
      'severity' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'size' => 'tiny',
        'description' => 'The severity level of the event; ranges from 0 (Emergency) to 7 (Debug)',
      ),
    ),
    'primary key' => array('flid'),
    'indexes' => array(
      'id' => array('id'),
      'id_feed_nid' => array('id', 'feed_nid'),
      'request_time' => array('request_time'),
      'log_time' => array('log_time'),
      'type' => array('type'),
    ),
  );
  return $schema;
}

/**
 * Rename feeds_source.batch to feeds_source.state, add slot for caching fetcher
 * result.
 */
function feeds_update_7100() {
  $spec = array(
    'type' => 'text',
    'size' => 'big',
    'not null' => FALSE,
    'description' => 'State of import or clearing batches.',
    'serialize' => TRUE,
  );
  db_change_field('feeds_source', 'batch', 'state', $spec);

  $spec = array(
    'type' => 'text',
    'size' => 'big',
    'not null' => FALSE,
    'description' => 'Cache for fetcher result.',
    'serialize' => TRUE,
  );
  db_add_field('feeds_source', 'fetcher_result', $spec);
}

/**
 * Add imported timestamp to feeds_source table.
 */
function feeds_update_7201() {
  $spec = array(
    'type' => 'int',
    'not null' => TRUE,
    'default' => 0,
    'unsigned' => TRUE,
    'description' => 'Timestamp when this source was imported last.',
  );
  db_add_field('feeds_source', 'imported', $spec);
}

/**
 * Create a single feeds_item table tracking all imports.
 */
function feeds_update_7202() {
  $spec = array(
    'description' => 'Tracks items such as nodes, terms, users.',
    'fields' => array(
      'entity_type' => array(
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The entity type.',
      ),
      'entity_id' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => 'The imported entity\'s serial id.',
      ),
      'id' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The id of the importer that created this item.',
      ),
      'feed_nid' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => 'Node id of the source, if available.',
      ),
      'imported' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Import date of the feed item, as a Unix timestamp.',
      ),
      'url' => array(
        'type' => 'text',
        'not null' => TRUE,
        'description' => 'Link to the feed item.',
      ),
      'guid' => array(
        'type' => 'text',
        'not null' => TRUE,
        'description' => 'Unique identifier for the feed item.'
      ),
      'hash' => array(
        'type' => 'varchar',
        'length' => 32, // The length of an MD5 hash.
        'not null' => TRUE,
        'default' => '',
        'description' => 'The hash of the source item.',
      ),
    ),
    'primary key' => array('entity_type', 'entity_id'),
    'indexes' => array(
      'id' => array('id'),
      'feed_nid' => array('feed_nid'),
      'lookup_url' => array('entity_type', 'id', 'feed_nid', array('url', 128)),
      'lookup_guid' => array('entity_type', 'id', 'feed_nid', array('guid', 128)),
      'imported' => array('imported'),
    ),
  );
  db_create_table('feeds_item', $spec);
  // Copy all existing values from old tables and drop them.
  $insert = "INSERT INTO {feeds_item} (entity_type, entity_id, id, feed_nid, imported, url, guid, hash)";
  db_query($insert . " SELECT 'node', nid, id, feed_nid, imported, url, guid, hash FROM {feeds_node_item}");
  db_query($insert . " SELECT 'taxonomy_term', tid, id, feed_nid, 0, '', '', '' FROM {feeds_term_item}");
  db_drop_table('feeds_node_item');
  db_drop_table('feeds_term_item');
}

/**
 * Add feeds_log table.
 */
function feeds_update_7203() {
  $schema = array(
    'description' => 'Table that contains logs of feeds events.',
    'fields' => array(
      'flid' => array(
        'type' => 'serial',
        'not null' => TRUE,
        'description' => 'Primary Key: Unique feeds event ID.',
      ),
      'id' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The id of the importer that logged the event.',
      ),
      'feed_nid' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => 'Node id of the source, if available.',
      ),
      'log_time' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Unix timestamp of when event occurred.',
      ),
      'request_time' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Unix timestamp of the request when the event occurred.',
      ),
      'type' => array(
        'type' => 'varchar',
        'length' => 64,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Type of log message, for example "feeds_import"."',
      ),
      'message' => array(
        'type' => 'text',
        'not null' => TRUE,
        'size' => 'big',
        'description' => 'Text of log message to be passed into the t() function.',
      ),
      'variables' => array(
        'type' => 'blob',
        'not null' => TRUE,
        'size' => 'big',
        'description' => 'Serialized array of variables that match the message string and that is passed into the t() function.',
      ),
      'severity' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'size' => 'tiny',
        'description' => 'The severity level of the event; ranges from 0 (Emergency) to 7 (Debug)',
      ),
    ),
    'primary key' => array('flid'),
    'indexes' => array(
      'id' => array('id'),
      'id_feed_nid' => array('id', 'feed_nid'),
      'request_time' => array('request_time'),
      'log_time' => array('log_time'),
      'type' => array('type'),
    ),
  );
  db_create_table('feeds_log', $schema);
}

/**
 * Add index for looking up by entity_type + url/ guid to feeds_item table.
 */
function feeds_update_7204() {
  db_add_index('feeds_item', 'global_lookup_url', array('entity_type', array('url', 128)));
  db_add_index('feeds_item', 'global_lookup_guid', array('entity_type', array('guid', 128)));
}

/**
 * Shorten {feeds_item}.entity_type to 32 chars and shorten relevant indexes.
 */
function feeds_update_7205() {
  db_drop_primary_key('feeds_item');
  db_drop_index('feeds_item', 'lookup_url');
  db_drop_index('feeds_item', 'lookup_guid');
  db_drop_index('feeds_item', 'global_lookup_url');
  db_drop_index('feeds_item', 'global_lookup_guid');

  db_change_field('feeds_item', 'entity_type', 'entity_type', array(
    'type' => 'varchar',
    'length' => 32,
    'not null' => TRUE,
    'default' => '',
    'description' => 'The entity type.',
  ));

  db_add_primary_key('feeds_item', array('entity_type', 'entity_id'));
  db_add_index('feeds_item', 'lookup_url', array('entity_type', 'id', 'feed_nid', array('url', 128)));
  db_add_index('feeds_item', 'lookup_guid', array('entity_type', 'id', 'feed_nid', array('guid', 128)));
  db_add_index('feeds_item', 'global_lookup_url', array('entity_type', array('url', 128)));
  db_add_index('feeds_item', 'global_lookup_guid', array('entity_type', array('guid', 128)));
}

/**
 * Change state and fetcher_result fields from text to blob.
 */
function feeds_update_7206() {
  db_change_field('feeds_source', 'state', 'state', array(
    'type' => 'blob',
    'size' => 'big',
    'not null' => FALSE,
    'description' => 'State of import or clearing batches.',
    'serialize' => TRUE,
  ));

  db_change_field('feeds_source', 'fetcher_result', 'fetcher_result', array(
    'type' => 'blob',
    'size' => 'big',
    'not null' => FALSE,
    'description' => 'Cache for fetcher result.',
    'serialize' => TRUE,
  ));
}

/**
 * Change config fields from text to big blobs.
 */
function feeds_update_7207() {
  db_change_field('feeds_importer', 'config', 'config', array(
    'type' => 'blob',
    'size' => 'big',
    'not null' => FALSE,
    'description' => 'Configuration of the feeds object.',
    'serialize' => TRUE,
  ));

  db_change_field('feeds_source', 'config', 'config', array(
    'type' => 'blob',
    'size' => 'big',
    'not null' => FALSE,
    'description' => 'Configuration of the feeds object.',
    'serialize' => TRUE,
  ));
}

/**
 * Update to use generic bundle handling.
 */
function feeds_update_7208(&$sandbox) {

  if (!isset($sandbox['importers'])) {
    // Get all importers.
    $sandbox['importers'] = db_query("SELECT id FROM {feeds_importer}")->fetchCol();
    $sandbox['total'] = count($sandbox['importers']);
  }

  $importer = array_pop($sandbox['importers']);
  $config = db_query("SELECT config FROM {feeds_importer} WHERE id = :id", array(':id' => $importer))->fetchField();

  if ($config) {
    $config = unserialize($config);

    switch ($config['processor']['plugin_key']) {
      case 'FeedsNodeProcessor':
        $config_key = 'content_type';
        break;

      case 'FeedsTermProcessor':
        $config_key = 'vocabulary';
        break;

      default:
        $config_key = FALSE;
        break;
    }

    if ($config_key && isset($config['processor']['config'][$config_key])) {
      $config['processor']['config']['bundle'] = $config['processor']['config'][$config_key];
      unset($config['processor']['config'][$config_key]);

      // Update databse.
      db_update('feeds_importer')
        ->fields(array(
          'config' => serialize($config),
        ))
        ->condition('id', $importer)
        ->execute();
    }

    $sandbox['#finished'] = 1 - count($sandbox['importers']) / $sandbox['total'];
  }
  else {
    $sandbox['#finished'] = 1;
  }
}