<?php

/**
 * @file
 * Installation file for the DrupalChat module.
 */

/**
 * Implements hook_install().
 */
function drupalchat_install() {
  // TODO The drupal_(un)install_schema functions are called automatically in D7.
  $success = array()/*drupal_install_schema('drupalchat')*/;

  if ($success) {
    drupal_set_message(st('The DrupalChat module installed tables successfully.'));
  }
  else {
    //drupal_set_message(st('The installation of the DrupalChat module failed.'), 'error');
  }
}

/**
 * @todo Please document this function.
 * @see http://drupal.org/node/1354
 */
function drupalchat_uninstall() {
  // TODO The drupal_(un)install_schema functions are called automatically in D7.
  // drupal_uninstall_schema('drupalchat')
  variable_del('drupalchat_polling_method');
  variable_del('drupalchat_refresh_rate');
  variable_del('drupalchat_send_rate');
  variable_del('drupalchat_ur_name');
  variable_del('drupalchat_ur_activate');
  variable_del('drupalchat_theme');
  variable_del('drupalchat_yui_path');
}

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

  $schema['drupalchat_msg'] = array(
    'fields' => array(
	  'message_id' => array(
        'type' => 'varchar',
        'length' => 50,
        'not null' => TRUE,
        'description' => 'ID of chat message.',
      ),
      'uid1' => array(
        'description' => 'Uid of the sender.',
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
      ),
      'uid2' => array(
        'description' => 'Uid of the receiver.',
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
      ),
      'message' => array(
        'type' => 'text',
        'size' => 'big',
        'not null' => TRUE,
        'description' => 'Chat message.',
      ),
      'timestamp' => array(
        'description' => 'The Unix timestamp when the XMPP account was created.',
        'type' => 'int',
        'not null' => TRUE,
        'unsigned' => TRUE,
      ),
    ),
    'indexes' => array(
      'uid1' => array('uid1'),
      'uid2' => array('uid2'),
    ),
  );
  $schema['drupalchat_users'] = array(
    'fields' => array(
      'uid' => array(
        'description' => 'The user uid.',
        'type' => 'int',
        'not null' => TRUE,
        'unsigned' => TRUE,
      ),
      'session' => array(
        'description' => 'Current session id.',
        'type' => 'varchar',
        'length' => 60,
        'not null' => TRUE,
      ),
      'name' => array(
        'description' => 'Name of the user.',
        'type' => 'varchar',
        'length' => 60,
        'not null' => TRUE,
      ),
      'status' => array(
        'description' => 'Unix timestamp of last activity.',
        'type' => 'int',
        'not null' => TRUE,
        'unsigned' => TRUE,
        'default' => 0,
        'size' => 'tiny',
      ),
      'timestamp' => array(
        'description' => 'Unix timestamp of last activity.',
        'type' => 'int',
        'not null' => TRUE,
        'unsigned' => TRUE,
      ),
    ),
    'primary key' => array('uid', 'session'),
	'indexes' => array(
      'uid' => array('uid'),
      'session' => array('session'),
	  'timestamp' => array('timestamp'),
    ),
  );

  return $schema;
}

function drupalchat_update_7000() {
  db_drop_index('drupalchat_msg','uid1');
  db_drop_index('drupalchat_msg','uid2');
  db_drop_primary_key('drupalchat_users');
  db_change_field('drupalchat_msg', 'uid1', 'uid1',
    array(
        'description' => 'Uid of the sender.',
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
    ));
  db_change_field('drupalchat_msg', 'uid2', 'uid2',
    array(
        'description' => 'Uid of the receiver.',
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
    ));
  if (!db_index_exists('drupalchat_msg','uid1')) {
    db_add_index('drupalchat_msg','uid1',array('uid1'));
  }
  if (!db_index_exists('drupalchat_msg','uid2')) {
    db_add_index('drupalchat_msg','uid2',array('uid2'));
  }
  if (!db_index_exists('drupalchat_users','uid')) {
    db_add_index('drupalchat_users','uid',array('uid'));
  }
  if (!db_index_exists('drupalchat_users','session')) {
    db_add_index('drupalchat_users','session',array('session'));
  }
}

function drupalchat_update_7001() {
  if(!db_field_exists('drupalchat_msg', 'message_id')) {
    db_add_field('drupalchat_msg', 'message_id', array(
        'type' => 'varchar',
        'length' => 50,
        'not null' => TRUE,
        'description' => 'ID of chat message.',
      ));
  }
}