<?php

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

/**
 * Implement hook_install().
 */
function styles_install() {
  return array();
}

/**
 * Implement hook_uninstall().
 */
function styles_uninstall() {
  foreach (styles_variable_default() as $variable => $value) {
    styles_variable_del($variable);
  }
  return array(array('success' => TRUE, 'query' => "Deleted all variables in the Styles namespace."));
}

/**
 * Implement hook_schema().
 */
function styles_schema() {
  $schema = array();

  $schema['cache_styles'] = drupal_get_schema_unprocessed('system', 'cache');
  $schema['cache_styles']['description'] = 'Cache table used to store information display manipulations that are in-progress.';

  $schema['styles'] = array(
    'description' => 'Stores configuration options for styles.',
    'fields' => array(
      'sid' => array(
        'description' => 'The primary identifier for a style.',
        'type' => 'serial',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'field_type' => array(
        'description' => 'The field type.',
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
      ),
      'name' => array(
        'description' => 'The style name.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
      ),
      'description' => array(
        'description' => 'The style description.',
        'type' => 'text',
        'not null' => TRUE,
        'size' => 'big',
      ),
    ),
    'primary key' => array('sid'),
    'indexes' => array(
      'field_type' => array('field_type'),
      'name' => array('name'),
    ),
  );

  $schema['styles_presets'] = array(
    'description' => 'Stores configuration options for styles presets.',
    'fields' => array(
      'pid' => array(
        'description' => 'The primary identifier for a style preset.',
        'type' => 'serial',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'field_type' => array(
        'description' => 'The field type.',
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
      ),
      'container_name' => array(
        'description' => 'The container name',
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
      ),
      'name' => array(
        'description' => 'The preset name.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
      ),
    ),
    'primary key' => array('pid'),
    'indexes' => array(
      'field_type' => array('field_type'),
      'container_name' => array('container_name'),
      'name' => array('name'),
    ),
  );

  $schema['styles_preset_instances'] = array(
    'description' => 'Stores the settings for each container/style preset.',
    'fields' => array(
      'sid' => array(
        'description' => 'The primary identifier for a style.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ),
      'pid' => array(
        'description' => 'The primary identifier for a style preset.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ),
    ),
    'foreign keys' => array(
      'sid' => array(
        'table' => 'styles',
        'columns' => array('sid' => 'sid'),
      ),
      'pid' => array(
        'table' => 'styles_presets',
        'columns' => array('pid' => 'pid'),
      ),
    ),
    'indexes' => array(
      'sid' => array('sid'),
      'pid' => array('pid'),
    ),
  );

  return $schema;
}

/**
 * Add new theme functions.
 */
function styles_update_7200() {
  drupal_theme_rebuild();
  return array();
}

/**
 * Clear old cache table of any styles data.
 */
function styles_update_7201() {
  cache_clear_all('styles_', 'cache', TRUE);
  return array();
}

/**
 * Add the field_type column to the {styles} table.
 */
function styles_update_7202() {
  db_add_field('styles', 'field_type', array(
    'description' => 'The field type.',
    'type' => 'varchar',
    'length' => 128,
    'not null' => TRUE,
  ));
  db_add_index('styles', 'field_type', array('field_type'));
}

/**
 * Add the label & description columns to the {styles} table.
 */
function styles_update_7204() {
  db_add_field('styles', 'label', array(
    'description' => 'The human readable label for the style.',
    'type' => 'varchar',
    'length' => 255,
    'not null' => TRUE,
    'default' => '',
  ));
  db_add_field('styles', 'description', array(
    'description' => 'The style description.',
    'type' => 'varchar',
    'length' => 255,
    'not null' => TRUE,
    'default' => '',
  ));
  db_add_index('styles', 'label', array('label'));
}

/**
 * Drop the label column from the {styles} table; alter the description column.
 */
function styles_update_7206() {
  db_drop_field('styles', 'label');
  db_drop_index('styles', 'label');
  db_change_field('styles', 'description', 'description',
    array(
      'description' => 'The style description.',
      'type' => 'text',
      'not null' => TRUE,
      'size' => 'big',
    )
  );
}

/**
 * Clear style and preset caches.
 */
function styles_update_7208() {
  return array();
}

/**
 * Ensure we catch included file Styles.inc.
 */
function styles_update_7209() {
  return array();
}

/**
 * Drop style_effects table.
 */
function styles_update_7211() {
  db_drop_table('style_effects');
}

/**
 * Create the styles_presets and styles_preset_instances tables.
 */
function styles_update_7212() {
  $schema = array();

  $schema['styles_presets'] = array(
    'description' => 'Stores configuration options for styles presets.',
    'fields' => array(
      'pid' => array(
        'description' => 'The primary identifier for a style preset.',
        'type' => 'serial',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'field_type' => array(
        'description' => 'The field type.',
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
      ),
      'container_name' => array(
        'description' => 'The container name',
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
      ),
      'name' => array(
        'description' => 'The preset name.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
      ),
      'description' => array(
        'description' => 'The preset description.',
        'type' => 'text',
        'not null' => TRUE,
        'size' => 'big',
      ),
    ),
    'primary key' => array('pid'),
    'indexes' => array(
      'field_type' => array('field_type'),
      'container_name' => array('container_name'),
      'name' => array('name'),
    ),
  );

  $schema['styles_preset_instances'] = array(
    'description' => 'Stores the settings for each container/style preset.',
    'fields' => array(
      'sid' => array(
        'description' => 'The primary identifier for a style.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ),
      'pid' => array(
        'description' => 'The primary identifier for a style preset.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ),
    ),
    'foreign keys' => array(
      'sid' => array(
        'table' => 'styles',
        'columns' => array('sid' => 'sid'),
      ),
      'pid' => array(
        'table' => 'styles_presets',
        'columns' => array('pid' => 'pid'),
      ),
    ),
    'indexes' => array(
      'sid' => array('sid'),
      'pid' => array('pid'),
    ),
  );

  if (!db_table_exists('styles_presets')) {
    db_create_table('styles_presets', $schema['styles_presets']);
  }
  if (!db_table_exists('styles_preset_instances')) {
    db_create_table('styles_preset_instances', $schema['styles_preset_instances']);
  }
}

/**
 * Remove the description from styles_presets.
 */
function styles_update_7213() {
  db_drop_field('styles_presets', 'description');
}

/**
 * Update old File Style formatters on Image fields to the Image formatter.
 */
function styles_update_7214() {
  $instances = array();
  $fields = field_read_fields(array('type' => 'image'), array('include_inactive' => TRUE));
  foreach ($fields as $field) {
    $instances = array_merge($instances, field_read_instances(array('field_id' => $field['id']), array('include_inactive' => TRUE)));
  }
  foreach ($instances as $instance) {
    $update_instance = FALSE;
    foreach ($instance['display'] as $view_mode => $display) {
      if (strpos($display['type'], 'styles_image_') === 0) {
        $update_instance = TRUE;
        $image_style = substr($display['type'], strlen('styles_image_'));
        $instance['display'][$view_mode]['type'] = 'image';
        $instance['display'][$view_mode]['settings'] = array('image_style' => $image_style, 'image_link' => FALSE);
      }
    }
    if ($update_instance) {
      field_update_instance($instance);
    }
  }
}

/**
 * Delete duplicate entries from the styles table.
 */
function styles_update_7215() {
  $names = db_query("SELECT name FROM {styles} GROUP BY name HAVING COUNT(*) > 1")->fetchCol();
  foreach ($names as $name) {
    $sids = db_select('styles')
      ->fields('styles', array('sid', 'name'))
      ->condition('name', $name)
      ->orderBy('sid', 'DESC')
      ->execute()
      ->fetchCol();
    array_shift($sids);
    foreach ($sids as $sid) {
      db_delete('styles')
        ->condition('sid', $sid)
        ->execute();
    }
  }
}