<?php


function _example_imgcache_presets(example_imgcache_HookHandler $h) {

  // I recommend underscores instead of hyphens,
  // to avoid problems with formatters.
  
  // galleriffic
  $h->addPreset('galleriffic_thumbnail')->scaleAndCrop(75, 75);
  $h->addPreset('galleriffic_full')->scale(490, '', FALSE);
  
  $h->addPreset('frontpage')->scale(217, '', FALSE);
  
  $h->addPreset('imagesoverview_square')->scaleAndCrop(111, 111);
  
  $h->addPreset('map')->scale(400, '100%', FALSE);
  
  $h->addPreset('photo_thumb')->scale(100, 100, FALSE);
}


// ---------------------------------------- shortcut infrastructure ------------


/**
 * Implementation of hook_imagecache_default_presets()
 */
function example_imgcache_imagecache_default_presets() {
  $presets = array();
  $hook_handler = new example_imgcache_HookHandler($presets);
  
  _example_imgcache_presets($hook_handler);
  
  return $presets;
}


class example_imgcache_HookHandler {
  protected $_presets;
  
  function __construct(&$presets) {
    $this->_presets = &$presets;
  }
  
  function addPreset($preset_name, array $settings = array()) {
    $this->_presets[$preset_name] = $settings + array(
      'presetname' => $preset_name,
      'actions' => array(),
    );
    $preset = &$this->_presets[$preset_name];
    return new example_imgcache_HookHandler_PresetWrapper($preset);
  }
}


class example_imgcache_HookHandler_PresetWrapper {

  protected $_preset;
  protected $_w;
  protected $_h;

  function __construct(array &$preset) {
    $this->_preset = &$preset;
  }


  /**
   * This one is generic, and accepts all kinds of actions
   */
  function addAction($settings) {
    $this->_preset['actions'][] = $settings;
    return $this;
  }


  function scaleAndCrop($w, $h) {

    $this->_preset['actions'][] = array (
      'module' => 'imagecache',
      'action' => 'imagecache_scale_and_crop',
      'data' => array (
        'width' => $w,
        'height' => $h,
      ),
    );

    return $this;
  }


  function crop($w, $h) {

    $this->_preset['actions'][] = array (
      'module' => 'imagecache',
      'action' => 'imagecache_crop',
      'data' => array (
        'width' => $w,
        'height' => $h,
        'xoffset' => 'center',
        'yoffset' => 'center',
      ),
    );

    return $this;
  }


  function scale($w, $h, $upscale = TRUE) {

    $this->_preset['actions'][] = array (
      'module' => 'imagecache',
      'action' => 'imagecache_scale',
      'data' => array (
        'width' => $w,
        'height' => $h,
        'upscale' => $upscale ? 1 : 0,
      ),
    );

    return $this;
  }
}