<?php
// $Id: tac_fields.install,v 1.1.2.1 2010/08/07 02:12:04 xjm Exp $

/**
 * @file
 * Install, update, and uninstall functions for the TAC Fields module.
 */

/**
 * Implements hook_schema().
 * Tables: {term_field_access} and {term_field_access_defaults}
 */
function tac_fields_schema() {
  $schema = array();
  
  $schema['term_field_access'] = array(
    'description' => t('Identifies which roles may view and update certain CCK fields of nodes with a given term.'),
    'fields' => array(
      'tid' => array(
        'description' => t('The term_data.tid this record affects.  Overrides vocabulary default in {term_field_access_defaults}.'),
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ),
      'rid' => array(
        'description' => t("The role.rid a user must possess to gain this row's privileges on this field for nodes for this term."),
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ),
      'field' => array(
        'description' => t('The CCK field to which this row applies.'),
        'type' => 'varchar',
        'length' => '32', // CCK's max fieldname length is 32 (26 plus 'field_')
        'not null' => TRUE,
        'default' => '',
      ),
      'grant_view' => array(
        'description' => t('Whether this role can view nodes with this term. 0=>Ignore, 1=>Allow, 2=>Deny.'),
        'type' => 'int',
        'unsigned' => TRUE,
        'size' => 'tiny',
        'not null' => TRUE,
        'default' => 0,
      ),
      'grant_update' => array(
        'description' => t('Whether this role can edit nodes with this term. 0=>Ignore, 1=>Allow, 2=>Deny.'),
        'type' => 'int',
        'unsigned' => TRUE,
        'size' => 'tiny',
        'not null' => TRUE,
        'default' => 0,
      ),
    ),
    'primary key' => array('tid', 'rid', 'field'),
  );

  $schema['term_field_access_defaults'] = array(
    'description' => t('Sets vocabulary defaults which roles may view and update certain CCK fields of nodes with a given term. Overridden by {term_field_access}.'),
    'fields' => array(
      'vid' => array(
        'description' => t('The vocabulary.vid for which this row sets defaults.'),
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ),
      'rid' => array(
        'description' => t("The role.rid a user must possess to gain this row's privileges on nodes for terms in this vocabulary."),
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ),
      'field' => array(
        'description' => t('The CCK field to which this row applies.'),
        'type' => 'varchar',
        'length' => '32', // CCK's max fieldname length is 32 (26 plus 'field_')
        'not null' => TRUE,
        'default' => '',
      ),
      'grant_view' => array(
        'description' => t('Whether this role can view nodes with terms in this vocabulary. 0=>Ignore, 1=>Allow, 2=>Deny.'),
        'type' => 'int',
        'unsigned' => TRUE,
        'size' => 'tiny',
        'not null' => TRUE,
        'default' => 0,
      ),
      'grant_update' => array(
        'description' => t('Whether this role can edit nodes with terms in this vocabulary. 0=>Ignore, 1=>Allow, 2=>Deny.'),
        'type' => 'int',
        'unsigned' => TRUE,
        'size' => 'tiny',
        'not null' => TRUE,
        'default' => 0,
      ),
    ),
    'primary key' => array('vid', 'rid', 'field'),
  );
  
  return $schema;
}

/**
 * Implements hook_install().
 * Adds module tables to the database and sets module weight.
 */
function tac_fields_install() {
  drupal_set_message("Warning: This module is experimental.  Do not use on a production site.", 'warning', FALSE);

  // Use Schema API to install tables.
  $status = drupal_install_schema('tac_fields');
  
  // drupal_install_schema() returns an array of the results of each query;
  // each entry includes 'status' which is 0 for failure or 1 for success.
  $success = 1;
  foreach ($status as $s) {
    $success = $success * $s['success'];
  }
  
  // Notify of changes
  if ($success) {
    drupal_set_message(t('TAC Fields module installed tables successfully.'));
  }
  else {
    drupal_set_message(t('The installation of TAC Fields was unsuccessful.'), 'error');
  }
}

/**
 * Implements hook_uninstall().
 * Removes module tables from the database.
 */
function tac_fields_uninstall() {
  $status = drupal_uninstall_schema('tac_fields');
  
  // drupal_install_schema() returns an array of the results of each query;
  // each entry includes 'status' which is 0 for failure or 1 for success.
  $success = 1;
  foreach ($status as $s) {
    $success = $success * $s['success'];
  }
  if ($success) {
    drupal_set_message(t('TAC Fields has been successfully uninstalled.'));
  }
  else {
    drupal_set_message(t('Uninstalling TAC Fields was unsuccessful.'), 'error');
  }
}