106 lines
2.9 KiB
PHP
106 lines
2.9 KiB
PHP
<?php
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declare(strict_types=1);
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namespace OCA\Memories;
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use OCA\Memories\AppInfo\Application;
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use OCP\Files\File;
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use OCP\IConfig;
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class Exif {
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/**
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* Get the path to the user's configured photos directory.
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* @param IConfig $config
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* @param string $userId
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*/
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public static function getPhotosPath(IConfig &$config, string &$userId) {
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$p = $config->getUserValue($userId, Application::APPNAME, 'timelinePath', '');
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if (empty($p)) {
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return '/Photos/';
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}
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return $p;
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}
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/**
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* Get exif data as a JSON object from a Nextcloud file.
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* @param File $file
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*/
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public static function getExifFromFile(File &$file) {
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$handle = $file->fopen('rb');
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if (!$handle) {
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throw new \Exception('Could not open file');
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}
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$exif = self::getExifFromStream($handle);
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fclose($handle);
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return $exif;
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}
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/**
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* Get exif data as a JSON object from a stream.
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* @param resource $handle
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*/
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public static function getExifFromStream(&$handle) {
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// Start exiftool and output to json
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$pipes = [];
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$proc = proc_open('exiftool -json -', [
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0 => array('pipe', 'rb'),
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1 => array('pipe', 'w'),
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2 => array('pipe', 'w'),
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], $pipes);
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// Write the file to exiftool's stdin
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// Assume exif exists in the first 256 kb of the file
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stream_copy_to_stream($handle, $pipes[0], 256 * 1024);
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fclose($pipes[0]);
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// Get output from exiftool
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$stdout = stream_get_contents($pipes[1]);
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// Clean up
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fclose($pipes[1]);
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fclose($pipes[2]);
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proc_close($proc);
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// Parse the json
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$json = json_decode($stdout, true);
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if (!$json) {
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throw new \Exception('Could not read exif data');
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}
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return $json[0];
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}
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/**
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* Get the date taken from either the file or exif data if available.
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* @param File $file
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* @param array $exif
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*/
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public static function getDateTaken(File &$file, array &$exif) {
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$dt = $exif['DateTimeOriginal'];
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if (!isset($dt) || empty($dt)) {
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$dt = $exif['CreateDate'];
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}
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// Check if found something
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if (isset($dt) && !empty($dt)) {
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$dt = \DateTime::createFromFormat('Y:m:d H:i:s', $dt);
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if ($dt && $dt->getTimestamp() > -5364662400) { // 1800 A.D.
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return $dt->getTimestamp();
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}
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}
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// Fall back to creation time
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$dateTaken = $file->getCreationTime();
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// Fall back to upload time
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if ($dateTaken == 0) {
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$dateTaken = $file->getUploadTime();
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}
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// Fall back to modification time
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if ($dateTaken == 0) {
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$dateTaken = $file->getMtime();
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}
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return $dateTaken;
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}
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} |