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Diffstat (limited to 'modules/exif/helpers/exif.php')
| -rw-r--r-- | modules/exif/helpers/exif.php | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/modules/exif/helpers/exif.php b/modules/exif/helpers/exif.php new file mode 100644 index 0000000..b17f460 --- /dev/null +++ b/modules/exif/helpers/exif.php @@ -0,0 +1,167 @@ +<?php defined("SYSPATH") or die("No direct script access."); +/** + * Gallery - a web based photo album viewer and editor + * Copyright (C) 2000-2013 Bharat Mediratta + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. + */ + +/** + * This is the API for handling exif data. + */ +class exif_Core { + + protected static $exif_keys; + + static function extract($item) { + $keys = array(); + // Only try to extract EXIF from photos + if ($item->is_photo() && $item->mime_type == "image/jpeg") { + $data = array(); + require_once(MODPATH . "exif/lib/exif.php"); + $exif_raw = read_exif_data_raw($item->file_path(), false); + if (isset($exif_raw['ValidEXIFData'])) { + foreach(self::_keys() as $field => $exifvar) { + if (isset($exif_raw[$exifvar[0]][$exifvar[1]])) { + $value = $exif_raw[$exifvar[0]][$exifvar[1]]; + $value = encoding::convert_to_utf8($value); + $keys[$field] = Input::clean($value); + + if ($field == "DateTime") { + $time = strtotime($value); + if ($time > 0) { + $item->captured = $time; + } + } else if ($field == "Caption" && !$item->description) { + $item->description = $value; + } + } + } + } + + $size = getimagesize($item->file_path(), $info); + if (is_array($info) && !empty($info["APP13"])) { + $iptc = iptcparse($info["APP13"]); + foreach (array("Keywords" => "2#025", "Caption" => "2#120") as $keyword => $iptc_key) { + if (!empty($iptc[$iptc_key])) { + $value = implode(" ", $iptc[$iptc_key]); + $value = encoding::convert_to_utf8($value); + $keys[$keyword] = Input::clean($value); + + if ($keyword == "Caption" && !$item->description) { + $item->description = $value; + } + } + } + } + } + $item->save(); + + $record = ORM::factory("exif_record")->where("item_id", "=", $item->id)->find(); + if (!$record->loaded()) { + $record->item_id = $item->id; + } + $record->data = serialize($keys); + $record->key_count = count($keys); + $record->dirty = 0; + $record->save(); + } + + static function get($item) { + $exif = array(); + $record = ORM::factory("exif_record") + ->where("item_id", "=", $item->id) + ->find(); + if (!$record->loaded()) { + return array(); + } + + $definitions = self::_keys(); + $keys = unserialize($record->data); + foreach ($keys as $key => $value) { + $exif[] = array("caption" => $definitions[$key][2], "value" => $value); + } + + return $exif; + } + + private static function _keys() { + if (!isset(self::$exif_keys)) { + self::$exif_keys = array( + "Make" => array("IFD0", "Make", t("Camera Maker"), ), + "Model" => array("IFD0", "Model", t("Camera Model"), ), + "Aperture" => array("SubIFD", "FNumber", t("Aperture"), ), + "ColorSpace" => array("SubIFD", "ColorSpace", t("Color Space"), ), + "ExposureBias" => array("SubIFD", "ExposureBiasValue", t("Exposure Value"), ), + "ExposureProgram" => array("SubIFD", "ExposureProgram", t("Exposure Program"), ), + "ExposureTime" => array("SubIFD", "ExposureTime", t("Exposure Time"), ), + "Flash" => array("SubIFD", "Flash", t("Flash"), ), + "FocalLength" => array("SubIFD", "FocalLength", t("Focal Length"), ), + "ISO" => array("SubIFD", "ISOSpeedRatings", t("ISO"), ), + "MeteringMode" => array("SubIFD", "MeteringMode", t("Metering Mode"), ), + "DateTime" => array("SubIFD", "DateTimeOriginal", t("Date/Time"), ), + "Copyright" => array("IFD0", "Copyright", t("Copyright"), ), + "ImageType" => array("IFD0", "ImageType", t("Image Type"), ), + "Orientation" => array("IFD0", "Orientation", t("Orientation"), ), + "ResolutionUnit" => array("IFD0", "ResolutionUnit", t("Resolution Unit"), ), + "xResolution" => array("IFD0", "xResolution", t("X Resolution"), ), + "yResolution" => array("IFD0", "yResolution", t("Y Resolution"), ), + "Compression" => array("IFD1", "Compression", t("Compression"), ), + "BrightnessValue" => array("SubIFD", "BrightnessValue", t("Brightness Value"), ), + "Contrast" => array("SubIFD", "Contrast", t("Contrast"), ), + "ExposureMode" => array("SubIFD", "ExposureMode", t("Exposure Mode"), ), + "FlashEnergy" => array("SubIFD", "FlashEnergy", t("Flash Energy"), ), + "Saturation" => array("SubIFD", "Saturation", t("Saturation"), ), + "SceneType" => array("SubIFD", "SceneType", t("Scene Type"), ), + "Sharpness" => array("SubIFD", "Sharpness", t("Sharpness"), ), + "SubjectDistance" => array("SubIFD", "SubjectDistance", t("Subject Distance"), ), + "Caption" => array("IPTC", "Caption", t("Caption"), ), + "Keywords" => array("IPTC", "Keywords", t("Keywords"), ) + ); + } + return self::$exif_keys; + } + + static function stats() { + $missing_exif = db::build() + ->select("items.id") + ->from("items") + ->join("exif_records", "items.id", "exif_records.item_id", "left") + ->where("type", "=", "photo") + ->and_open() + ->where("exif_records.item_id", "IS", null) + ->or_where("exif_records.dirty", "=", 1) + ->close() + ->execute() + ->count(); + + $total_items = ORM::factory("item")->where("type", "=", "photo")->count_all(); + if (!$total_items) { + return array(0, 0, 0); + } + return array($missing_exif, $total_items, + round(100 * (($total_items - $missing_exif) / $total_items))); + } + + static function check_index() { + list ($remaining) = exif::stats(); + if ($remaining) { + site_status::warning( + t('Your Exif index needs to be updated. <a href="%url" class="g-dialog-link">Fix this now</a>', + array("url" => html::mark_clean(url::site("admin/maintenance/start/exif_task::update_index?csrf=__CSRF__")))), + "exif_index_out_of_date"); + } + } +} |