<?php
// $Id$

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

/**
 * Implementation of 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' => 'text',
        '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' => 'text',
        'not null' => FALSE,
        'description' => 'Configuration of the source.',
        'serialize' => TRUE,
      ),
      'source' => array(
        'type' => 'text',
        'not null' => TRUE,
        'description' => t('Main source resource identifier. E. g. a path or a URL.'),
      ),
      'batch' => array(
        'type' => 'text',
        'size' => 'big',
        'not null' => FALSE,
        'description' => t('Cache for batching.'),
        'serialize' => TRUE,
      ),
    ),
    '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_schedule'] = array(
    'description' => t('Contains feeds scheduled for refresh.'),
    'fields' => array(
      '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.',
      ),
      'id' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Id of the feed configuration.',
      ),
      'callback' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Callback to be invoked.',
      ),
      'last_executed_time' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'default' => 0,
        'not null' => TRUE,
        'description' => 'Timestamp when a job was last executed.',
      ),
      'scheduled' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'default' => 0,
        'not null' => TRUE,
        'description' => 'Timestamp when a job was scheduled. 0 if a job is currently not scheduled.',
      ),
    ),
    'indexes' => array(
      'feed_nid' => array('feed_nid'),
      'id' => array('id'),
      'id_callback' => array('id', 'callback'),
      'last_executed_time' => array('last_executed_time'),
      'scheduled' => array('scheduled'),
    ),
  );
  $schema['feeds_node_item'] = array(
    'description' => t('Stores additional information about feed item nodes. Used by FeedsNodeProcessor.'),
    'fields' => array(
      'nid' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => t("Primary Key: The feed item node's nid."),
      ),
      'id' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The id of the fields object that is the producer of this item.',
      ),
      'feed_nid' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => t("Node id of the owner feed, if available."),
      ),
      'imported' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => t('Import date of the feed item, as a Unix timestamp.'),
      ),
      'url' => array(
        'type' => 'text',
        'not null' => TRUE,
        'description' => t('Link to the feed item.'),
      ),
      'guid' => array(
        'type' => 'text',
        'not null' => TRUE,
        'description' => t('Unique identifier for the feed item.'),
      ),
      'hash' => array(
        'type' => 'varchar',
        'length' => 32, // The length of an MD5 hash.
        'not null' => TRUE,
        'default' => '',
        'description' => t('The hash of the item.'),
      ),
    ),
    'primary key' => array('nid'),
    'indexes' => array(
      'id' => array('id'),
      'feed_nid' => array('feed_nid'),
      'imported' => array('imported'),
      'url' => array(array('url', 255)),
      'guid' => array(array('guid', 255)),
    ),
  );
  $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' => t('The URL of the hub endpoint of this subscription.'),
      ),
      'topic' => array(
        'type' => 'text',
        'not null' => TRUE,
        'description' => t('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'),
    ),
  );
  return $schema;
}

/**
 * Implementation of hook_install().
 */
function feeds_install() {
  // Create tables.
  drupal_install_schema('feeds');
}

/**
 * Implementation of hook_uninstall().
 */
function feeds_uninstall() {
  // Remove tables.
  drupal_uninstall_schema('feeds');
}

/**
 * Remove class field on feeds_config.
 */
function feeds_update_6001() {
  $ret = array();
  db_drop_field($ret, 'feeds_config', 'class');
  return $ret;
}

/**
 * Rename table.
 */
function feeds_update_6002() {
  $ret = array();
  db_rename_table($ret, 'feeds_config', 'feeds_importer');
  return $ret;
}

/**
 * Add primary keys to feeds_importer and feeds_source.
 */
function feeds_update_6003() {
  $ret = array();
  db_drop_index($ret, 'feeds_importer', 'id');
  db_add_primary_key($ret, 'feeds_importer', array('id'));
  db_add_primary_key($ret, 'feeds_source', array('id', 'feed_nid'));
  return $ret;
}

/**
 * Add source field to feeds_source, make fields part of PKs not null.
 */
function feeds_update_6004() {
  $ret = array();

  $spec = array(
    'type' => 'text',
    'not null' => TRUE,
    'description' => t('Main source resource identifier. E. g. a path or a URL.'),
  );
  db_add_field($ret, 'feeds_source', 'source', $spec);
  db_add_index($ret, 'feeds_source', 'id_source', array('id', array('source', 255)));

  // Make feed_nid not null, default 0. It is part of the primary key.
  $spec = array(
    'type' => 'int',
    'not null' => TRUE,
    'default' => 0,
    'unsigned' => TRUE,
    'description' => 'Node nid if this particular source is attached to a feed node.',
  );
  db_change_field($ret, 'feeds_schedule', 'feed_nid', 'feed_nid', $spec);


  // Same thing for feeds_source table.
  $spec = array(
    'type' => 'int',
    'not null' => TRUE,
    'default' => 0,
    'unsigned' => TRUE,
    'description' => 'Node nid if this particular source is attached to a feed node.',
  );
  db_change_field($ret, 'feeds_source', 'feed_nid', 'feed_nid', $spec);

  return $ret;
}

/**
 * Add callback column to feeds_schedule.
 */
function feeds_update_6005() {
  $ret = array();

  // Add a callback column and an index.
  $spec = array(
    'type' => 'varchar',
    'length' => 128,
    'not null' => TRUE,
    'default' => '',
    'description' => 'Callback to be invoked.',
  );
  db_add_field($ret, 'feeds_schedule', 'callback', $spec);

  db_add_index($ret, 'feeds_schedule', 'id_callback', array('id', 'callback'));

  return $ret;
}

/**
 * Remove primary key from feeds_schedule and replace it by an index.
 */
function feeds_update_6006() {
  $ret = array();

  db_drop_primary_key($ret, 'feeds_schedule');
  db_add_index($ret, 'feeds_schedule', 'feed_nid', array('feed_nid'));

  return $ret;
}

/**
 * Add hash column to feeds_node_item.
 */
function feeds_update_6007() {
  $ret = array();

  $spec = array(
    'type' => 'varchar',
    'length' => 32,
    'not null' => TRUE,
    'default' => '',
    'description' => t('The hash of the item.'),
  );
  db_add_field($ret, 'feeds_node_item', 'hash', $spec);

  return $ret;
}

/**
 * Add batch field to feeds_source table, adjust feeds_schedule table.
 */
function feeds_update_6008() {
  $ret = array();

  $spec = array(
    'type' => 'text',
    'size' => 'big',
    'not null' => FALSE,
    'description' => t('Cache for batching.'),
    'serialize' => TRUE,
  );
  db_add_field($ret, 'feeds_source', 'batch', $spec);

  // Make scheduled flag a timestamp.
  $spec = array(
    'type' => 'int',
    'size' => 'normal',
    'unsigned' => TRUE,
    'default' => 0,
    'not null' => TRUE,
    'description' => 'Timestamp when a job was scheduled. 0 if a job is currently not scheduled.',
  );
  db_change_field($ret, 'feeds_schedule', 'scheduled', 'scheduled', $spec);

  // Rename last_scheduled_time to last_executed_time, fix unsigned property.
  $spec = array(
    'type' => 'int',
    'size' => 'normal',
    'unsigned' => TRUE,
    'default' => 0,
    'not null' => TRUE,
    'description' => 'Timestamp when a job was last executed.',
  );
  db_change_field($ret, 'feeds_schedule', 'last_scheduled_time', 'last_executed_time', $spec);

  return $ret;
}

/**
 * Add feeds_push_subscriptions tables.
 */
function feeds_update_6009() {
  $ret = array();
  $table = array(
    'description' => 'PubSubHubbub subscriptions.',
    'fields' => array(
      'domain' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Domain of the subscriber. Corresponds to an importer id.',
      ),
      'subscriber_id' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'unsigned' => TRUE,
        'description' => 'ID of the subscriber. Corresponds to a feed nid.',
      ),
      'timestamp' => array(
        'type' => 'int',
        'unsigned' => FALSE,
        'default' => 0,
        'not null' => TRUE,
        'description' => 'Created timestamp.',
      ),
      'hub' => array(
        'type' => 'text',
        'not null' => TRUE,
        'description' => t('The URL of the hub endpoint of this subscription.'),
      ),
      'topic' => array(
        'type' => 'text',
        'not null' => TRUE,
        'description' => t('The topic URL (feed URL) of this subscription.'),
      ),
      'secret' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Shared secret for message authentication.',
      ),
      'status' => array(
        'type' => 'varchar',
        'length' => 64,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Status of subscription.',
      ),
      'post_fields' => array(
        'type' => 'text',
        'not null' => FALSE,
        'description' => 'Fields posted.',
        'serialize' => TRUE,
      ),
    ),
    'primary key' => array('domain', 'subscriber_id'),
    'indexes' => array(
      'timestamp' => array('timestamp'),
    ),
  );
  db_create_table($ret, 'feeds_push_subscriptions', $table);
  return $ret;
}