<?php
// $Id$

/**
 * @file
 * ImageCache functions.
 */

/**
 * Create ImageCache profiles for common display resolutions.
 */
function load_imagecache_presets_create() {
  $presets = module_invoke_all('load_imagecache_presets');
  foreach ($presets as $options) {
    load_imagecache_preset_create($options);
  }
}

/**
 * Create an ImageCache preset.
 *
 * @param $options
 *   Preset options.
 *
 * @see http://drupal.org/node/558664
 */
function load_imagecache_preset_create($options) {
  // Set preset name
  if (isset($options['name'])) {
    $name = $options['name'];
  }
  else {
    $name = $options['width'] .'x'. $options['height'];
  }

  // Check if preset already exists.
  $preset = imagecache_preset_by_name($name);
  if (!empty($preset)) {
    return;
  }

  // Create a preset.
  $preset = imagecache_preset_save(array('presetname' => $name));

  // Set operation name.
  if (isset($options['action'])) {
    $operation = $options['action'];
  }
  else {
    $operation = 'imagecache_scale_and_crop';
  }

  // Add preset actions.
  $action           = new stdClass();
  $action->presetid = $preset['presetid'];
  $action->module   = 'imagecache';
  $action->action   = $operation;
  $action->data     = array('width' => $options['width'], 'height' => $options['height']);
  drupal_write_record('imagecache_action', $action);
}

/**
 * Delete an ImageCache preset.
 *
 * @param $options
 *   Preset options.
 */
function load_imagecache_preset_delete($options) {
  // Set preset name.
  if (isset($options['name'])) {
    $name = $options['name'];
  }
  else {
    $name = $options['width'] .'x'. $options['height'];
  }    

  // Check if preset exists.
  $preset = imagecache_preset_by_name($name);
  if (!empty($preset)) {
    imagecache_preset_delete(imagecache_preset_by_name($name));
  }
}

/**
 * Update imagecache presets.
 *
 * @param $old
 *   Old presets to be deleted.
 *
 * @param $new
 *   New presets to be created.
 */
function load_imagecache_presets_update($old = array(), $new = NULL) {
  // Remove old presets.
  foreach ($old as $options) {
    load_imagecache_preset_delete($options);
  }

  if ($new == NULL) {
    load_imagecache_presets_create();
  }
  else {
    // Create new presets.
    foreach ($new as $options) {
      load_imagecache_preset_create($options);
    }
  }
}

/**
 * Return an array of common display resolutions.
 */
function load_imagecache_presets_load_imagecache_presets() {
  return array(
    array('width' => '90%', 'height' => '90%', 'operation' => 'imagecache_scale', 'name' => '0.90x0.90'),
    array('width' => '80%', 'height' => '80%', 'operation' => 'imagecache_scale', 'name' => '0.80x0.80'),
    array('width' => '70%', 'height' => '70%', 'operation' => 'imagecache_scale', 'name' => '0.70x0.70'),
    array('width' => '60%', 'height' => '60%', 'operation' => 'imagecache_scale', 'name' => '0.60x0.60'),
    array('width' => '50%', 'height' => '50%', 'operation' => 'imagecache_scale', 'name' => '0.50x0.50'),
    array('width' => '40%', 'height' => '40%', 'operation' => 'imagecache_scale', 'name' => '0.40x0.40'),
    array('width' => '30%', 'height' => '30%', 'operation' => 'imagecache_scale', 'name' => '0.30x0.30'),
    array('width' => '20%', 'height' => '20%', 'operation' => 'imagecache_scale', 'name' => '0.20x0.20'),
    array('width' => '10%', 'height' => '10%', 'operation' => 'imagecache_scale', 'name' => '0.10x0.10'),
    array('width' => '95%', 'height' => '95%', 'operation' => 'imagecache_scale', 'name' => '0.95x0.95'),
    array('width' => '85%', 'height' => '85%', 'operation' => 'imagecache_scale', 'name' => '0.85x0.85'),
    array('width' => '75%', 'height' => '75%', 'operation' => 'imagecache_scale', 'name' => '0.75x0.75'),
    array('width' => '65%', 'height' => '65%', 'operation' => 'imagecache_scale', 'name' => '0.65x0.65'),
    array('width' => '55%', 'height' => '55%', 'operation' => 'imagecache_scale', 'name' => '0.55x0.55'),
    array('width' => '45%', 'height' => '45%', 'operation' => 'imagecache_scale', 'name' => '0.45x0.45'),
    array('width' => '35%', 'height' => '35%', 'operation' => 'imagecache_scale', 'name' => '0.35x0.35'),
    array('width' => '25%', 'height' => '25%', 'operation' => 'imagecache_scale', 'name' => '0.25x0.25'),
    array('width' => '15%', 'height' => '15%', 'operation' => 'imagecache_scale', 'name' => '0.15x0.15'),
    array('width' => '5%',  'height' => '5%',  'operation' => 'imagecache_scale', 'name' => '0.05x0.05'),
  );
}