<?php

/**
 * @file
 * Installation file for VotingAPI module.
 */

function votingapi_schema() {
  $schema['votingapi_vote'] = array(
    'fields' => array(
      'vote_id' => array('type' => 'serial', 'unsigned' => TRUE, 'not null' => TRUE),
      'entity_type' => array('type' => 'varchar', 'length' => 64, 'not null' => TRUE, 'default' => 'node'),
      'entity_id' => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0),
      'value' => array('type' => 'float', 'not null' => TRUE, 'default' => 0),
      'value_type' => array('type' => 'varchar', 'length' => 64, 'not null' => TRUE, 'default' => 'percent'),
      'tag' => array('type' => 'varchar', 'length' => 64, 'not null' => TRUE, 'default' => 'vote'),
      'uid' => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0),
      'timestamp' => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0),
      'vote_source' => array('type' => 'varchar', 'length' => 255),
    ),
    'primary key' => array('vote_id'),
    'indexes' => array(
      'content_uid' => array('entity_type', 'entity_id', 'uid'),
      'content_uid_2' => array('entity_type', 'uid'),
      'content_source' => array('entity_type', 'entity_id', 'vote_source'),
      'content_value_tag' => array('entity_type', 'entity_id', 'value_type', 'tag'),
    ),
  );
  $schema['votingapi_cache'] = array(
    'fields' => array(
      'vote_cache_id' => array('type' => 'serial', 'unsigned' => TRUE, 'not null' => TRUE),
      'entity_type' => array('type' => 'varchar', 'length' => 64, 'not null' => TRUE, 'default' => 'node'),
      'entity_id' => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0),
      'value' => array('type' => 'float', 'not null' => TRUE, 'default' => 0),
      'value_type' => array('type' => 'varchar', 'length' => 64, 'not null' => TRUE, 'default' => 'percent'),
      'tag' => array('type' => 'varchar', 'length' => 64, 'not null' => TRUE, 'default' => 'vote'),
      'function' => array('type' => 'varchar', 'length' => 64, 'not null' => TRUE, 'default' => ''),
      'timestamp' => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0),
    ),
    'primary key' => array('vote_cache_id'),
    'indexes' => array(
      'content' => array('entity_type', 'entity_id'),
      'content_function' => array('entity_type', 'entity_id', 'function'),
      'content_tag_func' => array('entity_type', 'entity_id', 'tag', 'function'),
      'content_vtype_tag' => array('entity_type', 'entity_id', 'value_type', 'tag'),
      'content_vtype_tag_func' => array('entity_type', 'entity_id', 'value_type', 'tag', 'function'),
    ),
  );
  return $schema;
}

/**
 * The most recent update removed for version-to-version compatibility.
 */
function votingapi_update_last_removed() {
  return 6101;
}

/**
 * Fix default values for entity_type columns
 */
function votingapi_update_7203() {
  db_change_field('votingapi_vote',  'entity_type', 'entity_type', array('type' => 'varchar', 'length' => 64, 'not null' => TRUE, 'default' => 'node'));
  db_change_field('votingapi_cache', 'entity_type', 'entity_type', array('type' => 'varchar', 'length' => 64, 'not null' => TRUE, 'default' => 'node'));
}

/**
 * Queue orphaned votes for deletion (nodes and comments)
 */
function votingapi_update_7202() {
  $tables[] = 'votingapi_vote';
  $tables[] = 'votingapi_cache';

  $types[] = array('node', 'node', 'nid');
  $types[] = array('comment', 'comment', 'cid');

  $queue = DrupalQueue::get('VotingAPIOrphaned', TRUE);

  foreach ($types as $w) {
    list($type, $type_table, $type_key) = $w;
    if (!db_table_exists($type_table)) {
      continue;
    }
    foreach ($tables as $table) {
      $sql = "SELECT v.entity_type, v.entity_id FROM {{$table}} v
              LEFT OUTER JOIN {{$type_table}} e ON v.entity_id=e.$type_key
              WHERE v.entity_type='$type' AND e.$type_key IS NULL
              GROUP BY v.entity_type, v.entity_id";
      $result = db_query($sql);
      foreach ($result as $row) {
        $queue->createItem((array) $row);
      }
    }
  }
}

/**
 * Renaming the 'content_type' and 'content_id' columns to entity_type and entity_id.
 * Reduces confusion about 'content types' versus 'node types'.
 */
function votingapi_update_7201() {
  $index['votingapi_vote'] = array(
    'content_uid'       => array('entity_type', 'entity_id', 'uid'),
    'content_uid_2'     => array('entity_type', 'uid'),
    'content_source'    => array('entity_type', 'entity_id', 'vote_source'),
    'content_value_tag' => array('entity_type', 'entity_id', 'value_type', 'tag'),
  );
  $index['votingapi_cache'] = array(
    'content'                => array('entity_type', 'entity_id'),
    'content_function'       => array('entity_type', 'entity_id', 'function'),
    'content_tag_func'       => array('entity_type', 'entity_id', 'tag', 'function'),
    'content_vtype_tag'      => array('entity_type', 'entity_id', 'value_type', 'tag'),
    'content_vtype_tag_func' => array('entity_type', 'entity_id', 'value_type', 'tag', 'function'),
  );
  // Remove all existing indexes.
  foreach ($index as $table => $data) {
    foreach ($data as $index_name => $columns) {
      if (db_index_exists($table, $index_name)) {
        db_drop_index($table, $index_name);
      }
    }
  }

  // Change fields
  foreach (array('votingapi_vote', 'votingapi_cache') as $table) {
    db_change_field($table, 'content_type', 'entity_type', array('type' => 'varchar', 'length' => 64, 'not null' => TRUE, 'default' => 'node'));
    db_change_field($table, 'content_id', 'entity_id', array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0));
    db_change_field($table, 'value_type', 'value_type', array('type' => 'varchar', 'length' => 64, 'not null' => TRUE, 'default' => 'percent'));
    db_change_field($table, 'tag', 'tag', array('type' => 'varchar', 'length' => 64, 'not null' => TRUE, 'default' => 'vote'));
  }

  // Recreate the indexes.
  foreach ($index as $table => $data) {
    foreach ($data as $index_name => $columns) {
      db_add_index($table, $index_name, $columns);
    }
  }

  return t('Updated VotingAPI table structure.');
}


/**
 * Implements hook_uninstall().
 */
function votingapi_uninstall() {
  // Delete variables created by voteapi module.
  $variables = array(
    'votingapi_last_cron',
    'votingapi_anonymous_window',
    'votingapi_user_window',
    'votingapi_calculation_schedule',
  );
  foreach ($variables as $variable) {
    variable_del($variable);
  }
}