174 lines
7.3 KiB
PHP
174 lines
7.3 KiB
PHP
<?php defined("SYSPATH") or die("No direct script access.");
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/**
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* Gallery - a web based photo album viewer and editor
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* Copyright (C) 2000-2011 Bharat Mediratta
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/**
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* This is the API for handling exif data.
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*/
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class exif_Core {
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protected static $exif_keys;
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static function extract($item) {
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$keys = array();
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// Only try to extract EXIF from photos
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if ($item->is_photo() && $item->mime_type == "image/jpeg") {
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$data = array();
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require_once(MODPATH . "exif/lib/exif.php");
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$exif_raw = read_exif_data_raw($item->file_path(), false);
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if (isset($exif_raw['ValidEXIFData'])) {
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foreach(self::_keys() as $field => $exifvar) {
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if (isset($exif_raw[$exifvar[0]][$exifvar[1]])) {
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$value = $exif_raw[$exifvar[0]][$exifvar[1]];
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if (function_exists("mb_detect_encoding") &&
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mb_detect_encoding($value, "ISO-8859-1, UTF-8") != "UTF-8") {
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$value = utf8_encode($value);
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}
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$keys[$field] = Input::clean($value);
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if ($field == "DateTime") {
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$time = strtotime($value);
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if ($time > 0) {
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$item->captured = $time;
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}
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} else if ($field == "Caption" && !$item->description) {
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$item->description = $value;
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}
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}
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}
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}
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$size = getimagesize($item->file_path(), $info);
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if (is_array($info) && !empty($info["APP13"])) {
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$iptc = iptcparse($info["APP13"]);
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foreach (array("Keywords" => "2#025", "Caption" => "2#120") as $keyword => $iptc_key) {
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if (!empty($iptc[$iptc_key])) {
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$value = implode(" ", $iptc[$iptc_key]);
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if (function_exists("mb_detect_encoding") &&
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mb_detect_encoding($value, "ISO-8859-1, UTF-8") != "UTF-8") {
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$value = utf8_encode($value);
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}
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$keys[$keyword] = Input::clean($value);
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if ($keyword == "Caption" && !$item->description) {
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$item->description = $value;
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}
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}
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}
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}
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}
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$item->save();
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$record = ORM::factory("exif_record")->where("item_id", "=", $item->id)->find();
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if (!$record->loaded()) {
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$record->item_id = $item->id;
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}
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$record->data = serialize($keys);
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$record->key_count = count($keys);
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$record->dirty = 0;
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$record->save();
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}
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static function get($item) {
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$exif = array();
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$record = ORM::factory("exif_record")
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->where("item_id", "=", $item->id)
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->find();
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if (!$record->loaded()) {
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return array();
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}
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$definitions = self::_keys();
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$keys = unserialize($record->data);
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foreach ($keys as $key => $value) {
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$exif[] = array("caption" => $definitions[$key][2], "value" => $value);
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}
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return $exif;
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}
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private static function _keys() {
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if (!isset(self::$exif_keys)) {
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self::$exif_keys = array(
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"Make" => array("IFD0", "Make", t("Camera Maker"), ),
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"Model" => array("IFD0", "Model", t("Camera Model"), ),
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"Aperture" => array("SubIFD", "FNumber", t("Aperture"), ),
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"ColorSpace" => array("SubIFD", "ColorSpace", t("Color Space"), ),
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"ExposureBias" => array("SubIFD", "ExposureBiasValue", t("Exposure Value"), ),
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"ExposureProgram" => array("SubIFD", "ExposureProgram", t("Exposure Program"), ),
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"ExposureTime" => array("SubIFD", "ExposureTime", t("Exposure Time"), ),
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"Flash" => array("SubIFD", "Flash", t("Flash"), ),
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"FocalLength" => array("SubIFD", "FocalLength", t("Focal Length"), ),
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"ISO" => array("SubIFD", "ISOSpeedRatings", t("ISO"), ),
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"MeteringMode" => array("SubIFD", "MeteringMode", t("Metering Mode"), ),
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"DateTime" => array("SubIFD", "DateTimeOriginal", t("Date/Time"), ),
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"Copyright" => array("IFD0", "Copyright", t("Copyright"), ),
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"ImageType" => array("IFD0", "ImageType", t("Image Type"), ),
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"Orientation" => array("IFD0", "Orientation", t("Orientation"), ),
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"ResolutionUnit" => array("IFD0", "ResolutionUnit", t("Resolution Unit"), ),
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"xResolution" => array("IFD0", "xResolution", t("X Resolution"), ),
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"yResolution" => array("IFD0", "yResolution", t("Y Resolution"), ),
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"Compression" => array("IFD1", "Compression", t("Compression"), ),
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"BrightnessValue" => array("SubIFD", "BrightnessValue", t("Brightness Value"), ),
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"Contrast" => array("SubIFD", "Contrast", t("Contrast"), ),
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"ExposureMode" => array("SubIFD", "ExposureMode", t("Exposure Mode"), ),
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"FlashEnergy" => array("SubIFD", "FlashEnergy", t("Flash Energy"), ),
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"Saturation" => array("SubIFD", "Saturation", t("Saturation"), ),
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"SceneType" => array("SubIFD", "SceneType", t("Scene Type"), ),
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"Sharpness" => array("SubIFD", "Sharpness", t("Sharpness"), ),
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"SubjectDistance" => array("SubIFD", "SubjectDistance", t("Subject Distance"), ),
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"Caption" => array("IPTC", "Caption", t("Caption"), ),
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"Keywords" => array("IPTC", "Keywords", t("Keywords"), )
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);
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}
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return self::$exif_keys;
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}
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static function stats() {
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$missing_exif = db::build()
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->select("items.id")
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->from("items")
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->join("exif_records", "items.id", "exif_records.item_id", "left")
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->where("type", "=", "photo")
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->and_open()
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->where("exif_records.item_id", "IS", null)
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->or_where("exif_records.dirty", "=", 1)
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->close()
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->execute()
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->count();
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$total_items = ORM::factory("item")->where("type", "=", "photo")->count_all();
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if (!$total_items) {
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return array(0, 0, 0);
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}
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return array($missing_exif, $total_items,
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round(100 * (($total_items - $missing_exif) / $total_items)));
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}
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static function check_index() {
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list ($remaining) = exif::stats();
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if ($remaining) {
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site_status::warning(
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t('Your Exif index needs to be updated. <a href="%url" class="g-dialog-link">Fix this now</a>',
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array("url" => html::mark_clean(url::site("admin/maintenance/start/exif_task::update_index?csrf=__CSRF__")))),
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"exif_index_out_of_date");
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}
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}
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}
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