so that we know * which exif information we have to read * * Naming convention are: field_exif_xxx (xxx would be the name of the exif * tag to read * * @param $arCckFields array of CCK fields * @return array a list of exif tags to read for this image */ public function getExifFields($arCckFields=array()) { $arSections = array('exif', 'file', 'computed', 'ifd0', 'gps', 'winxp', 'iptc', 'xmp'); $arExif = array(); foreach ($arCckFields as $field) { $ar = explode("_", $field['field_name']); if ($ar[0] == 'field' && isset($ar[1]) && in_array($ar[1], $arSections)) { unset($ar[0]); $section = $ar[1]; unset($ar[1]); $arExif[] = array('section'=>$section, 'tag'=>implode("_", $ar)); } } return $arExif; } /** * Read the Information from a picture according to the fields specified in CCK * @param $file * @param $arTagNames * @return array */ public function readExifTags($file, $arTagNames=array()) { if (!file_exists($file)) { return array(); } $ar_supported_types = array('jpg', 'jpeg'); if (!in_array(strtolower($this->getFileType($file)), $ar_supported_types)) { return array(); } $exif = exif_read_data($file, 0); $arSmallExif = array(); foreach ((array)$exif as $key => $value) { $arSmallExif[strtolower($key)] = $value; } $info = array(); foreach ($arTagNames as $tagName) { if ($tagName['section'] != 'iptc' && !empty($arSmallExif[$tagName['tag']])) { $info[$tagName['section'] .'_'. $tagName['tag']] = $arSmallExif[$tagName['tag']]; } } return $info; } private function getFileType($file) { $ar = explode('.', $file); $ending = $ar[count($ar)-1]; return $ending; } public function readIPTCTags($file, $arTagNames=array()) { $humanReadableKey = $this->getHumanReadableIPTCkey(); $size = GetImageSize ($file, $infoImage); $iptc = empty($infoImage["APP13"]) ? array() : iptcparse($infoImage["APP13"]); $arSmallIPTC = array(); if (is_array($iptc)) { foreach($iptc as $key => $value) { $resultTag = ""; foreach($value as $innerkey => $innervalue) { if( ($innerkey+1) != count($value) ) { $resultTag .= $innervalue . ", "; } else { $resultTag .= $innervalue; } } $arSmallIPTC[$humanReadableKey[$key]] = $resultTag; } } $info = array(); foreach ($arTagNames as $tagName) { if ($tagName['section'] == "iptc") { $info[$tagName['section'] .'_'. $tagName['tag']] = utf8_encode($arSmallIPTC[$tagName['tag']]); } } return $info; } /** * Read XMP data from an image file. * * @param $file * File path. * * @param $arTagNames * Available metadata fields. * * @return * XMP image metadata. * * @todo * Support for different array keys. */ public function readXMPTags($file, $arTagNames=array()) { // Get a CCK-XMP mapping. $map = $this->getXMPFields(); $xmp = $this->openXMP($file); // Iterate over XMP fields defined by CCK. foreach ($arTagNames as $tagName) { if ($tagName['section'] == "xmp") { // Get XMP field. $config = $map[$tagName['tag']]; $field = $this->readXMPItem($xmp, $config); $info[$tagName['section'] .'_'. $tagName['tag']] = $field; } } $this->closeXMP($xmp); return $info; } /** * Open an image file for XMP data extraction. * * @param $file * File path. * * @return * Array with XMP file and metadata. */ function openXMP($file) { // Setup $xmpfiles = new SXMPFiles(); $xmpmeta = new SXMPMeta(); // Open $xmpfiles->OpenFile($file); $xmpfiles->GetXMP($xmpmeta); return array('files' => $xmpfiles, 'meta' => $xmpmeta); } /** * Close a file opened for XMP data extraction. * * @param $xmp * XMP array as returned from openXMP(). */ function closeXMP($xmp) { $xmp['files']->CloseFile(); } /** * Read a single item from an image file. * * @param $xmp * XMP array as returned from openXMP(). * * @param $config * XMP field configuration. * * @param $key * In case of array field type, the numeric field key. * * @return * Field value. */ public function readXMPItem($xmp, $config, $key = 0) { // Setup. $xmpfiles = $xmp['files']; $xmpmeta = $xmp['meta']; // Sort. $xmpmeta->Sort(); // Read XMP data. if ($config['type'] == 'property') { $value = $xmpmeta->GetProperty($config['name'], $config['ns']); } elseif ($config['type'] == 'array') { $value = $xmpmeta->GetArrayItem($config['name'], $key, $config['ns']); } elseif ($config['type'] == 'struct') { $value = $xmpmeta->GetStructField($config['ns'], $config['struct'], $config['ns'], $config['name']); } return $value; } /** * Just some little helper function to get the iptc fields * @return array * */ public function getHumanReadableIPTCkey() { return array( "2#202" => "object_data_preview_data", "2#201" => "object_data_preview_file_format_version", "2#200" => "object_data_preview_file_format", "2#154" => "audio_outcue", "2#153" => "audio_duration", "2#152" => "audio_sampling_resolution", "2#151" => "audio_sampling_rate", "2#150" => "audio_type", "2#135" => "language_identifier", "2#131" => "image_orientation", "2#130" => "image_type", "2#125" => "rasterized_caption", "2#122" => "writer", "2#120" => "caption", "2#118" => "contact", "2#116" => "copyright_notice", "2#115" => "source", "2#110" => "credit", "2#105" => "headline", "2#103" => "original_transmission_reference", "2#101" => "country_name", "2#100" => "country_code", "2#095" => "state", "2#092" => "sublocation", "2#090" => "city", "2#085" => "by_line_title", "2#080" => "by_line", "2#075" => "object_cycle", "2#070" => "program_version", "2#065" => "originating_program", "2#063" => "digital_creation_time", "2#062" => "digital_creation_date", "2#060" => "creation_time", "2#055" => "creation_date", "2#050" => "reference_number", "2#047" => "reference_date", "2#045" => "reference_service", "2#042" => "action_advised", "2#040" => "special_instruction", "2#038" => "expiration_time", "2#037" => "expiration_date", "2#035" => "release_time", "2#030" => "release_date", "2#027" => "content_location_name", "2#026" => "content_location_code", "2#025" => "keywords", "2#022" => "fixture_identifier", "2#020" => "supplemental_category", "2#015" => "category", "2#010" => "subject_reference", "2#010" => "urgency", "2#008" => "editorial_update", "2#007" => "edit_status", "2#005" => "object_name", "2#004" => "object_attribute_reference", "2#003" => "object_type_reference", "2#000" => "record_version" ); } /** * XMP fields mapper. As we're dealing with a mapper between RDF * elements and CCK fields, we have to define custom keys that * both on the field name and the namespace used. * * And, as the XMP specs also defines some datatypes like properties, * arrays and structures, we have to deal with those as well. * * @return array * Mapping between CCK and XMP fields. */ public function getXMPFields() { return array( 'headline' => array( 'name' => 'Headline', 'ns' => 'http://ns.adobe.com/photoshop/1.0/', 'type' => 'property', ), 'authorsposition' => array( 'name' => 'AuthorsPosition', 'ns' => 'http://ns.adobe.com/photoshop/1.0/', 'type' => 'property', ), 'instructions' => array( 'name' => 'Instructions', 'ns' => 'http://ns.adobe.com/photoshop/1.0/', 'type' => 'property', ), 'subject' => array( 'name' => 'subject', 'ns' => 'http://purl.org/dc/elements/1.1/', 'type' => 'array', ), 'description' => array( 'name' => 'description', 'ns' => 'http://purl.org/dc/elements/1.1/', 'type' => 'array', ), 'creator' => array( 'name' => 'creator', 'ns' => 'http://purl.org/dc/elements/1.1/', 'type' => 'array', ), 'rights' => array( 'name' => 'rights', 'ns' => 'http://purl.org/dc/elements/1.1/', 'type' => 'array', ), 'ciadrextadr' => array( 'name' => 'CiAdrExtadr', 'ns' => 'http://iptc.org/std/Iptc4xmpCore/1.0/xmlns/', 'type' => 'struct', 'struct' => 'CreatorContactInfo', ), 'ciemailwork' => array( 'name' => 'CiEmailWork', 'ns' => 'http://iptc.org/std/Iptc4xmpCore/1.0/xmlns/', 'type' => 'struct', 'struct' => 'CreatorContactInfo', ), 'ciurlwork' => array( 'name' => 'CiUrlWork', 'ns' => 'http://iptc.org/std/Iptc4xmpCore/1.0/xmlns/', 'type' => 'struct', 'struct' => 'CreatorContactInfo', ), 'scene' => array( 'name' => 'Scene', 'ns' => 'http://iptc.org/std/Iptc4xmpCore/1.0/xmlns/', 'type' => 'array', ), 'hierarchicalsubject' => array( 'name' => 'hierarchicalSubject', 'ns' => 'lr', 'type' => 'array', ), 'location' => array( 'name' => 'Location', 'ns' => 'http://iptc.org/std/Iptc4xmpCore/1.0/xmlns/', 'type' => 'property', ), ); } }