73 lines
3.0 KiB
PHP
73 lines
3.0 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) 2000-2013 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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class exif_gps_Core {
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protected static $exif_keys;
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static function extract($item) {
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$keys = array();
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// Extract Latitude and Longitude from the image (if they exist).
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if ($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]][$exifvar[1]];
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if (function_exists("mb_detect_encoding") && mb_detect_encoding($value) != "UTF-8") {
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$value = utf8_encode($value);
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}
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$keys[$field] = Input::clean($value);
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}
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}
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}
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}
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// If coordinates were extracted, save them to the database.
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if (isset($keys["Latitude"]) && isset($keys["Longitude"])) {
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$record = ORM::factory("exif_coordinate");
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$record->item_id = $item->id;
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$record->latitude = str_replace(",", ".", $keys["Latitude"]);
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$record->longitude = str_replace(",", ".", $keys["Longitude"]);
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// Represent N/S/E/W as postive and negative numbers
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if (substr(strtoupper($keys["Latitude Reference"]), 0, 1) == "S") {
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$record->latitude = "-" . $record->latitude;
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}
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if (substr(strtoupper($keys["Longitude Reference"]), 0, 1) == "W") {
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$record->longitude = "-" . $record->longitude;
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}
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$record->save();
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}
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}
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private static function _keys() {
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// EXIF fields to extract.
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if (!isset(self::$exif_keys)) {
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self::$exif_keys = array(
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"Latitude Reference" => array("GPS", "Latitude Reference", t("GPS: Latitude Reference"), ),
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"Longitude Reference" => array("GPS", "Longitude Reference", t("GPS: Longitude Reference"),),
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"Latitude" => array("GPS", "Latitude", t("GPS: Latitude"), ),
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"Longitude" => array("GPS", "Longitude", t("GPS: Longitude"), )
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);
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}
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return self::$exif_keys;
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}
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}
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