public function generate_image($type, $filter_chain)
{
try {
$original = new midcom_db_attachment($this->attachment);
} catch (midcom_error $e) {
$e->log();
return false;
}
$found_derived = false;
try {
$derived = new midcom_db_attachment($this->{$type});
$found_derived = true;
} catch (midcom_error $e) {
$derived = new midcom_db_attachment();
$derived->parentguid = $original->parentguid;
$derived->title = $original->title;
$derived->mimetype = $original->mimetype;
$derived->name = $type . '_' . $original->name;
}
$imagefilter = new midcom_helper_imagefilter($original);
if (!$imagefilter->process_chain($filter_chain)) {
throw new midcom_error('Image processing failed');
}
if (!$found_derived) {
if (!$derived->create()) {
throw new midcom_error('Failed to create derived image: ' . midcom_connection::get_error_string());
}
$this->{$type} = $derived->id;
$this->update();
}
return $imagefilter->write($derived);
}
/**
* Automatically convert the uploaded file to a web-compatible type. Uses
* only the first image of multi-page uploads (like PDFs) and populates the
* _target_mimetype member accordingly. The original_tmpname file is manipulated
* directly.
*
* Uploaded GIF, PNG and JPEG files are left untouched.
*
* In case of any conversions being done, the new extension will be appended
* to the uploaded file.
*
* @return boolean Indicating success
*/
function _auto_convert_to_web_type()
{
debug_add("\$this->_original_mimetype: {$this->_original_mimetype}");
switch ($this->_original_mimetype) {
case 'image/png':
case 'image/gif':
case 'image/jpeg':
$this->_target_mimetype = $this->_original_mimetype;
$conversion = null;
break;
case 'application/postscript':
case 'application/pdf':
$this->_target_mimetype = 'image/png';
$conversion = 'png';
break;
default:
$this->_target_mimetype = 'image/jpeg';
$conversion = 'jpg';
break;
}
debug_add("\$conversion={$conversion}");
if (empty($conversion)) {
return true;
}
if (!midcom_helper_imagefilter::imagemagick_available()) {
throw new midcom_error('DM2 type image requires ImageMagick for manipulation operations, see debug log for details');
}
// PONDER: Make sure there is only one extension on the file ??
$this->_filename .= ".{$conversion}";
return $this->_filter->convert($conversion);
}
/**
* Automatically convert the uploaded file to a web-compatible type. Uses
* only the first image of multi-page uploads (like PDFs) and populates the
* _target_mimetype member accordingly. The original_tmpname file is manipulated
* directly.
*
* Uploaded GIF, PNG and JPEG files are left untouched.
*
* In case of any conversions being done, the new extension will be appended
* to the uploaded file.
*
* @return boolean Indicating success
*/
function _auto_convert_to_web_type()
{
debug_add("\$this->_original_mimetype: {$this->_original_mimetype}");
switch (preg_replace('/;.+$/', '', $this->_original_mimetype)) {
case 'image/png':
case 'image/gif':
case 'image/jpeg':
debug_add('No conversion necessary we already have a web mime type');
return true;
case 'application/postscript':
case 'application/pdf':
$this->_target_mimetype = 'image/png';
$conversion = 'png';
break;
default:
$this->_target_mimetype = 'image/jpeg';
$conversion = 'jpg';
break;
}
debug_add("\$conversion={$conversion}");
if (!$this->imagemagick_available()) {
throw new midcom_error('DM2 type image requires ImageMagick for manipulation operations, see debug log for details');
}
// Prevent double .jpg.jpg in case of trouble file the get_mimetype()
if (!preg_match("/\\.{$conversion}\$/", $this->_filename)) {
$this->_filename .= ".{$conversion}";
// Make sure there is only one extension on the file ??
$this->_filename = midcom_db_attachment::safe_filename($this->_filename, true);
}
if ($this->_filter) {
return $this->_filter->convert($conversion);
}
}
/**
* Recreates all images from either the "original" or the "main" image
*/
function recreate_images()
{
foreach ($this->images as $identifier => $images) {
$image = null;
if (isset($images['original'])) {
$image = $images['original'];
} else {
if (isset($images['main'])) {
$image = $images['main'];
}
}
if (!$image) {
debug_add("Image {$identifier} has no 'original' or 'main' image, skipping recreation.", MIDCOM_LOG_INFO);
continue;
}
if (empty($image['object'])) {
debug_add("Image {$identifier} has no image object, skipping recreation.", MIDCOM_LOG_INFO);
continue;
}
// Copy the "main image" to a temporary location
$filter = new midcom_helper_imagefilter();
$tmp = $filter->create_tmp_copy($image['object']);
// Update all derived images
if (!$this->update_image($identifier, $image['filename'], $tmp, $this->titles[$identifier])) {
debug_add("Failed to recreate image {$identifier}, skipping .", MIDCOM_LOG_INFO);
}
}
return true;
}
