tripal/modules/base/tripal_organism/tripal_organism.install

<?php

/**
*  Implementation of hook_install();
*
* @ingroup tripal_organism
*/
function tripal_organism_install(){

   // create the module's data directory
   tripal_create_moddir('tripal_organism');

   // create the directory where image files will be stored.  We create this 
   // here otherwise it will get created when the first organism is synced.
   // The user that performs the syncing will receive ownership of the 
   // images directory which may not allow for write access by the web server
   // user.  So, we create it here
   $dest = file_directory_path() . "/tripal/tripal_organism/images";
   file_check_directory($dest,FILE_CREATE_DIRECTORY);

   // create the tables that correlate drupal nodes with chado
   // features, organisms, etc....
   drupal_install_schema('tripal_organism');

}

/**
* Implementation of hook_schema().
*
* @ingroup tripal_organism
*/
function tripal_organism_schema() {
   $schema = tripal_organism_get_schemas();
	return $schema;
}

/**
* Implementation of hook_uninstall()
*
* @ingroup tripal_organism
*/
function tripal_organism_uninstall(){
   drupal_uninstall_schema('tripal_organism');

   // Get the list of nodes to remove
   $sql_lib_id = "SELECT nid, vid ".
                 "FROM {node} ".
                 "WHERE type='chado_organism'";
   $result = db_query($sql_lib_id);
   while ($node = db_fetch_object($result)) {
      node_delete($node->nid);
   }

   // remove the materialized views
   
   // Remove the custom view if exists
   if (db_table_exists('tripal_organism_views_common_name')) {
      $sql = "DROP TABLE {tripal_organism_views_common_name}";
      db_query ($sql);
   }
}

/**
* This function simply defines all tables needed for the module to work
* correctly.  By putting the table definitions in a separate function we
* can easily provide the entire list for hook_install or individual
* tables for an update.
*
* @ingroup tripal_organism
*/
function tripal_organism_get_schemas (){
  $schema = array();

  $schema['chado_organism'] = array(
      'fields' => array(
         'vid' => array(
            'type' => 'int',
            'unsigned' => TRUE,
            'not null' => TRUE,
            'default' => 0
         ),
         'nid' => array(
            'type' => 'int',
            'unsigned' => TRUE,
            'not null' => TRUE,
            'default' => 0
         ),
         'organism_id' => array(
            'type' => 'int',
            'not null' => TRUE,
            'default' => 0
         )
      ),
      'indexes' => array(
         'organism_id' => array('organism_id')
      ),
      'unique keys' => array(
         'nid_vid' => array('nid','vid'),
         'vid' => array('vid')
      ),
      'primary key' => array('nid'),
  );
  return $schema;
}

/**
 * Implementation of hook_requirements(). Make sure 'Tripal Core' is enabled
 * before installation
 *
 * @ingroup tripal_organism
 */
function tripal_organism_requirements($phase) {
   $requirements = array();
   if ($phase == 'install') {
      if (!function_exists('tripal_create_moddir')) {
         $requirements ['tripal_organism'] = array(
            'title' => "tripal_organism",
            'value' => "error. Some required modules are just being installed. Please try again.",
            'severity' => REQUIREMENT_ERROR,
         );
      }
   }
   return $requirements;
}