<?php

class ImageTagProcessor extends kDBTagProcessor {

	/**
	 * Prepares all image parameters as list block parameters (for easy usage)
	 *
	 * @param kDBList $object
	 * @param Array $block_params
	 * @author Alex
	 */
	function PrepareListElementParams(&$object, &$block_params)
	{
		$image_url = $this->ImageSrc($block_params);
		if (!$image_url) {
			return ;
		}

		$block_params['img_path'] = $image_url;
		$image_dimensions = $this->ImageSize($block_params);
		$block_params['img_size'] = $image_dimensions ? $image_dimensions : ' width="'.$block_params['DefaultWidth'].'"';
		$block_params['alt'] = htmlspecialchars($object->GetField('AltName')); // really used ?
	}

	/**
	 * [AGGREGATED TAGS] works as <inp2:CatalogItemPrefix_Image, ImageSize, ImageSrc ..../>
	 *
	 * @param Array $params
	 * @return string
	 */
	function ItemImageTag($params)
	{
		$this->LoadItemImage($params);
		return $this->$params['original_tag']($params);
	}

	function LargeImageExists($params)
	{
		$object =& $this->getObject($params);
		if ($object->GetDBField('SameImages') == null || $object->GetDBField('SameImages') == 1) {
			return false;
		}
		else {
			return true;
		}
	}

	function LoadItemImage($params)
	{
		$parent_item =& $this->Application->recallObject($params['PrefixSpecial']);

		$object =& $this->Application->recallObject($this->getPrefixSpecial(), null, Array('skip_autoload' => true));
		/* @var $object kDBItem */

		$object->Clear();

		// if we need primary thumbnail which is preloaded with category item's list
		$is_primary = $this->SelectParam($params, 'primary,Primary');
		$image_id = $this->Application->GetVar($this->Prefix.'_id');

		if (
			// is primary, when primary mark set OR name & field not given
			($is_primary || !(isset($params['name']) || isset($params['field']))) &&

			// primary image is preloaded AND direct id not given
			isset($parent_item->Fields['ThumbPath']) && !$image_id
		) {
			$object->SetDefaultValues();
			$object->SetDBField('Url', $parent_item->GetDBField('FullUrl'));
			$object->SetDBFieldsFromHash($parent_item->GetFieldValues(), Array('SameImages', 'LocalThumb', 'ThumbPath', 'ThumbUrl', 'LocalImage', 'LocalPath'));
			$object->Loaded = true;
		}
		else { // if requested image is not primary thumbnail - load it directly
			$id_field = $this->Application->getUnitOption($this->Prefix, 'ForeignKey');
			$parent_table_key = $this->Application->getUnitOption($this->Prefix, 'ParentTableKey');

			$keys[$id_field] = $parent_item->GetDBField($parent_table_key);

			// which image to load?
			if ($is_primary) {
				// by PrimaryImage mark
				$keys['DefaultImg'] = 1;
			}
			elseif (getArrayValue($params, 'name')) {
				// by ImageName
				$keys['Name'] = $params['name'];
			}
			elseif (getArrayValue($params, 'field')) {
				// by virtual field name in main object
				$field_options = $parent_item->GetFieldOptions($params['field']);
				$keys['Name'] = $field_options['original_field'];
			}
			elseif ($image_id) {
				// by ID
				$keys['ImageId'] = $image_id;
			}
			else {
				// by PrimaryImage if no other criteria given
				$keys['DefaultImg'] = 1;
			}

			$object->Load($keys);
		}
	}

	function getImageDimension($type, $params)
	{
		$ret = isset($params['Max'.$type]) ? $params['Max'.$type] : false;
		if (!$ret) {
			return $ret;
		}
		$parent_prefix = $this->Application->getUnitOption($this->Prefix, 'ParentPrefix');

		if ($ret == 'thumbnail') {
			$ret = $this->Application->ConfigValue($parent_prefix.'_ThumbnailImage'.$type);
		}
		if ($ret == 'fullsize') {
			$ret = $this->Application->ConfigValue($parent_prefix.'_FullImage'.$type);
		}

		return $ret;
	}

	function ImageSrc($params)
	{
		$object =& $this->getObject($params);
		$base_url = rtrim($this->Application->BaseURL(), '/');

		if ($object->GetDBField('SameImages') && $object->GetDBField('ThumbPath')) {
			// we can auto-resize image, when source image available & we use same image for thumbnail & full image in admin

			$image_helper =& $this->Application->recallObject('ImageHelper');
			/* @var $image_helper ImageHelper */

			$max_width = $this->getImageDimension('Width', $params);
			$max_height = $this->getImageDimension('Height', $params);

			if ($max_width > 0 || $max_height > 0) {
				// image auto-resize is required
				$src_image = FULL_PATH.$object->GetDBField('ThumbPath');
				list ($max_width, $max_height, $resized) = $image_helper->GetImageDimensions($src_image, $max_width, $max_height);

				if ($resized) {
					$src_path = FULL_PATH.($this->Application->IsAdmin() ? IMAGES_PENDING_PATH : IMAGES_PATH);
					$dst_image = preg_replace('/^'.preg_quote($src_path, '/').'(.*)\.(.*)$/', $src_path.'resized/\\1_'.$max_width.'x'.$max_height.'.\\2', $src_image);
					if (!file_exists($dst_image) || filemtime($src_image) > filemtime($dst_image)) {
						// resized image not available OR should be recreated due source image change
						$image_resized = $image_helper->ScaleImage($src_image, $dst_image, $max_width, $max_height);
						if (!$image_resized) {
							// resize failed, because of server error
							$dst_image = $src_image;
						}
					}

					return preg_replace('/^'.preg_quote(FULL_PATH, '/').'(.*)/', $base_url.'\\1', $dst_image);
				}
			}
		}

		$ret = '';

		// if we need thumbnail, or full image is same as thumbnail
		$show_thumbnail =	$this->SelectParam($params, 'thumbnail,Thumbnail') || // old style
							(isset($params['MaxWidth']) && $params['MaxWidth'] == 'thumbnail') || // new style
							(isset($params['MaxHeight']) && $params['MaxHeight'] == 'thumbnail');

		if ($show_thumbnail || $object->GetDBField('SameImages')) {
			// return local image or url
			$ret = $object->GetDBField('LocalThumb') ? $base_url.$object->GetDBField('ThumbPath') : $object->GetDBField('ThumbUrl');
			if ($object->GetDBField('LocalThumb') && !file_exists(FULL_PATH.$object->GetDBField('ThumbPath')) && !constOn('DBG_IMAGE_RECOVERY')) {
				// local thumbnail file is missing
				$ret = '';
			}
		}
		else { // if we need full which is not the same as thumb
			$ret = $object->GetDBField('LocalImage') ? $base_url.$object->GetDBField('LocalPath') : $object->GetDBField('Url');
			if ($object->GetDBField('LocalImage') && !file_exists(FULL_PATH.$object->GetDBField('LocalPath'))) {
				// local full image file is missing
				$ret = '';
			}
		}

		$default_image = $this->SelectParam($params, 'default_image,DefaultImage');
		return ($ret && $ret != $base_url) ? $ret : ($default_image ? $base_url.THEMES_PATH.'/'.$default_image : false);
	}

	function getFullPath($path)
	{
		if (!$path) {
			return $path;
		}

		// absolute url
		if (preg_match('/^(.*):\/\/(.*)$/U', $path)) {
			return preg_replace('/^'.preg_quote($this->Application->BaseURL(), '/').'(.*)/', FULL_PATH.'/\\1', $path);
		}

		// relative url
		return FULL_PATH.'/'.substr(THEMES_PATH, 1).'/'.$path;
	}

	/**
	 * Makes size clause for img tag, such as
	 * ' width="80" height="100"' according to max_width
	 * and max_heght limits.
	 *
	 * @param array $params
	 * @return string
	 */
	function ImageSize($params)
	{
		$img_path = $this->getFullPath($params['img_path']);

		$image_helper =& $this->Application->recallObject('ImageHelper');
		/* @var $image_helper ImageHelper */

		$max_width = $this->getImageDimension('Width', $params);
		$max_height = $this->getImageDimension('Height', $params);

		$image_dimensions = $image_helper->GetImageDimensions($img_path, $max_width, $max_height);
		if (!$image_dimensions) {
			return false;
		}

		return ' width="'.$image_dimensions[0].'" height="'.$image_dimensions[1].'"';
	}

	/**
	 * Prepares image parameters & parses block with them (for admin)
	 *
	 * @param Array $params
	 * @return string
	 */
	function Image($params)
	{
		$image_url = $this->ImageSrc($params);
		if (!$image_url) {
			return ;
		}

		$object =& $this->getObject($params);
		$params['img_path'] = $image_url;
		$image_dimensions = $this->ImageSize($params);
		$params['img_size'] = $image_dimensions ? $image_dimensions : ' width="'.$params['DefaultWidth'].'"';
		$params['alt'] = htmlspecialchars($object->GetField('AltName')); // really used ?
		$params['name'] = $this->SelectParam($params, 'block,render_as');

		if (!$object->isLoaded() && !$this->SelectParam($params, 'default_image,DefaultImage')) {
			return false;
		}

		return $this->Application->ParseBlock($params);
	}


	/**
	 * Returns url for image in case when image source is url (for admin)
	 *
	 * @param Array $params
	 * @return string
	 */
	function ImageUrl($params)
	{
		$object =& $this->getObject($params);
		if ($object->GetDBField('SameImages') ? $object->GetDBField('LocalThumb') : $object->GetDBField('LocalImage') ) {
			$ret = $this->Application->Phrase(getArrayValue($params,'local_phrase'));
		}
		else {
			$ret = $object->GetDBField('SameImages') ? $object->GetDBField('ThumbUrl') : $object->GetDBField('Url');
		}
		return $ret;
	}

}

?>