<?php

/**
 * @file
 * Contains install, update, and uninstall functions for Skinr Context.
 */

/**
 * Implements hook_schema().
 */
function skinr_context_schema() {
  $schema['skinr_groups'] = array(
    'description' => 'Stores skin configuration group data for Skinr.',
    'fields' => array(
      'gid' => array(
        'description' => 'The primary identifier for a skin configuration group.',
        'type' => 'serial',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'module' => array(
        'description' => 'The module this group applies to.',
        'type' => 'varchar',
        'length' => 64,
        'not null' => TRUE,
        'default' => '',
      ),
      'element' => array(
        'description' => 'The element this group applies to.',
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
      ),
      'title' => array(
        'description' => 'The administrative title for this group.',
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
      ),
      'description' => array(
        'description' => 'Description for this group.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
      ),
      'conditions' => array(
        'description' => 'Serialized storage of all context condition settings.',
        'type' => 'text',
        'serialize' => TRUE,
      ),
      'condition_mode' => array(
        'description' => 'Condition mode for this context.',
        'type' => 'int',
        'default' => 0,
      ),
      'weight' => array(
        'description' => 'Weight of the group. Lighter weights are higher up, heavier weights go down.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'status' => array(
        'description' => 'Boolean indicating whether or not this item is enabled.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 1,
        'size' => 'tiny',
      ),
    ),
    'primary key' => array('gid'),
    'indexes' => array(
      'module' => array('module'),
      'element' => array('module', 'element'),
    ),
  );

  $schema['skinr_group_skins'] = array(
    'description' => 'Associates skin configurations with a particular group.',
    'fields' => array(
      'gid' => array(
        'description' => 'The skin configuration group ID.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'sid' => array(
        'description' => 'The skin configuration ID.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
    ),
    'primary key' => array('gid', 'sid'),
    'indexes' => array(
      'gid' => array('gid'),
    ),
  );

  return $schema;
}

/**
 * Implements hook_uninstall().
 */
function skinr_context_uninstall() {
}

/**
 * Implements hook_enable().
 */
function skinr_context_enable() {
  $t = get_t();

  // Associate each skin with a group, if it isn't already.
  $query = db_select('skinr_skins', 's');
  $query->leftJoin('skinr_group_skins', 'gs', 's.sid = gs.sid');
  $query->fields('s');
  $query->fields('gs', array('gid'));
  $result = $query->execute();
  foreach ($result as $skin) {
    $skin->options = unserialize($skin->options);

    $group = NULL;
    if (empty($skin->gid)) {
      // Lookup existing group. Grab the one with the lowest weight for this set.
      $params = array(
        'module' => $skin->module,
        'element' => $skin->element,
      );
      $gids = skinr_context_group_get_gids($params);
      $gid = reset($gids);
      if (!$gid) {
        // Create a group.
        $group = (object) array(
          'gid' => NULL,
          'module' => $skin->module,
          'element' => $skin->element,
          'title' => $t('Default'),
          'description' => '',
          'conditions' => array('sitewide' => array('values' => array(1 => 1))),
          'condition_mode' => CONTEXT_CONDITION_MODE_OR,
          'weight' => 0,
          'status' => 1,
        );
        skinr_context_group_save($group);
        $gid = $group->gid;
      }
      $skin->gid = $gid;
      // Simulate insert to ensure group is linked.
      skinr_context_skinr_skin_insert($skin);
    }

    if (!$group) {
      $group = skinr_context_group_load($skin->gid);
    }

    if ($skin->status && $group && !$group->status) {
      // Disable skins where group is disabled.
      $skin->status = 0;
      skinr_skin_save($skin);
    }
  }
}