Migrate ImageCache from D6 to Image Style D7

migrate_image_styles.php

<?php
define('DRUPAL_ROOT', getcwd());

require_once DRUPAL_ROOT . '/includes/bootstrap.inc';
drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);

function imagecache_preset_actions($preset, $reset = FALSE) {
  $actions_cache = array();
  $result = db_query('SELECT * FROM {imagecache_action} where presetid = '.$preset['presetid'].' order by weight' );
  foreach ($result as $row ) { 
    $row=(array)$row;
    $row['data'] = unserialize($row['data']);
    $actions_cache[$preset['presetid']][] = $row;
  }
  return isset($actions_cache[$preset['presetid']]) ? $actions_cache[$preset['presetid']] : array();
}

function imagecache_presets() {
  $presets = array();
  $normal_presets = array();
  $result = db_query('SELECT * FROM {imagecache_preset} ORDER BY presetname');
  foreach ($result as $preset) {
    $preset=(array)$preset;
    $presets[$preset['presetid']] = $preset;
    $presets[$preset['presetid']]['actions'] = imagecache_preset_actions($preset);
    $presets[$preset['presetid']]['storage'] = 0;
    // Collect normal preset names so we can skip defaults and mark overrides accordingly
    $normal_presets[$preset['presetname']] = $preset['presetid'];
  }
  return $presets;
}

$styles_cnt = 0;
$effects_new_cnt = 0;
$effects_ext_cnt = 0;

$presets = imagecache_presets();
foreach ($presets as $preset) {
  $styles_cnt++;// inc styles
  $style = image_style_load($preset['presetname']);
  $style['name'] = $preset['presetname'];
  $style = image_style_save($style);
  if (!isset($style['effects'])) {
    $style['effects'] = array();
  }
  foreach ($preset['actions'] as $action) {
    $action['action'] = str_replace('imagecache', 'image', $action['action']);
    $action['module'] = str_replace('imagecache', 'image', $action['module']);

    $effect_ieid = FALSE;// effect not exists
    foreach ($style['effects'] as $effect) {
      if ($effect['name'] == $action['action'] && $effect['module'] == $action['module'] && $effect['weight'] == $action['weight'] && $effect['data'] == $action['data'] ) {
        $effect_ieid = $effect['ieid'];// effect exists
      }
    }
    $effect = array();
    if ($effect_ieid) {
      $effects_ext_cnt++;// inc exists 
      $effect = image_effect_load($effect_ieid, $style['name']);
    }
    else {
      $effects_new_cnt++;// inc new
      $effect = image_effect_definition_load($action['action']);
    }

    $effect['isid'] = $style['isid'];

    $effect['name'] = $action['action'];
    $effect['module'] = $action['module'];
    $effect['weight'] = $action['weight'];
    $effect['data'] = $action['data'];
    $effect = image_effect_save($effect);
    $style['effects'][$effect['ieid']] = $effect;
  }
  $style = image_style_save($style);
}

print "Styles: $styles_cnt,    Effects new: $effects_new_cnt, Effects exists: $effects_ext_cnt \n";