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Edit File: Base.php

<?php
/**
 * Copyright 2009-2017 Horde LLC (http://www.horde.org/)
 *
 * See the enclosed file LICENSE for license information (LGPL). If you
 * did not receive this file, see http://www.horde.org/licenses/lgpl21.
 *
 * @author   Michael J. Rubinsky <mrubinsk@horde.org>
 * @category Horde
 * @package  Image
 */

/**
 * Base class for Horde_Image_Exif drivers.
 *
 * @author    Michael J. Rubinsky <mrubinsk@horde.org>
 * @category  Horde
 * @copyright 2009-2017 Horde LLC
 * @package   Image
 */
abstract class Horde_Image_Exif_Base
{
    /**
     * Instance parameters.
     *
     * @var array
     */
    protected $_params;

/**
     * Optional Logger
     */
    protected $_logger;

/**
     *
     * @param array $params  Parameter array:
     *        - logger: Horde_Log_Logger  Logger instance.
     */
    public function __construct($params = array())
    {
        if (!empty($params['logger'])) {
            $this->_logger = $params['logger'];
            unset($params['logger']);
        }
        $this->_params = $params;
    }

/**
     * Process the EXIF data.
     *
     * @param array $exif  Array of EXIF data.
     *
     * @return array  An array of processed EXIF data.
     */
    protected function _processData($exif)
    {
        if (!$exif) {
            return array();
        }

$results = array();
        $fields = Horde_Image_Exif::getFields($this);
        foreach ($fields as $field => $data) {
            $value = isset($exif[$field]) ? $exif[$field] : '';
            // Don't store empty fields.
            if ($value === '') {
                continue;
            }

/* Special handling of GPS data */
            if ($data['type'] == 'gps') {
                $value = $this->_parseGPSData($exif[$field]);
                if (!empty($exif[$field . 'Ref']) &&
                    in_array($exif[$field . 'Ref'], array('S', 'South', 'W', 'West'))) {
                    $value = - abs($value);
                }
            }

/* Date fields are converted to a timestamp.*/
            if ($data['type'] == 'date') {
                @list($ymd, $hms) = explode(' ', $value, 2);
                @list($year, $month, $day) = explode(':', $ymd, 3);
                if (!empty($hms) && !empty($year) && !empty($month) && !empty($day)) {
                    $time = "$month/$day/$year $hms";
                    $value = strtotime($time);
                }
            }

if ($data['type'] == 'array' || is_array($value)) {
                if (is_array($value)) {
                    $value = implode(',', $value);
                }
            }

$results[$field] = $value;
        }

return $results;
    }

/**
     * Parse the Longitude and Latitude values into a standardized format
     * regardless of the source format.
     *
     * @param mixed $data  An array containing degrees, minutes, seconds
     *                     in index 0, 1, 2 respectifully.
     *
     * @return double  The location data in a decimal format.
     */
    protected function _parseGPSData($data)
    {
        // According to EXIF standard, GPS data can be in the form of
        // dd/1 mm/1 ss/1 or as a decimal reprentation.
        if (!is_array($data)) {
            // Assume a scalar is a decimal representation. Cast it to a float
            // which will get rid of any stray ordinal indicators. (N, S,
            // etc...)
            return (double)$data;
        }

if ($data[0] == 0) {
            return 0;
        }

if (strpos($data[0], '/') !== false) {
            $degrees = explode('/', $data[0]);
            if (count($degrees) > 1) {
                $degrees = $degrees[0] / $degrees[1];
            } else {
                $degrees = $degrees[0];
            }
        } else {
            $degrees = $data[0];
        }

if (strpos($data[1], '/') !== false) {
            $min = explode('/', $data[1]);
            if (count($min) > 1) {
                $min = $min[0] / $min[1];
            } else {
                $min = $min[0];
            }
        } else {
            $min = $data[1];
        }

if (strpos($data[2], '/') !== false) {
            $sec = explode('/', $data[2]);
            if (count($sec) > 1) {
                $sec = $sec[0] / $sec[1];
            } else {
                $sec = $sec[0];
            }
        } else {
            $sec = $data[2];
        }

return self::_degToDecimal($degrees, $min, $sec);
    }

/**
     * Convert degrees representation to decimal representation.
     *
     * @param double $degrees  The degrees latitude or longitude.
     * @param double $minutes  The minutes latitude or longitude.
     * @param double $seconds  the seconds latitude or longitude.
     *
     * @return double  The decimal representation of the latitude or longitute.
     */
    protected function _degToDecimal($degrees, $minutes, $seconds)
    {
        $degs = (double)($degrees + ($minutes / 60) + ($seconds / 3600));

return round($degs, 6);
    }

protected function _logDebug($message)
    {
        if (!empty($this->_logger)) {
            $this->_logger->debug($message);
        }
    }

protected function _logErr($message)
    {
        if (!empty($this->_logger)) {
            $this->_logger->err($message);
        }
    }

abstract public function getData($image);

abstract public function supportedCategories();
}