xref: /webtrees/app/Media.php (revision 16d0b7f74e80c16cb445079b0322702930031dc7) 
1<?php
2/**
3 * webtrees: online genealogy
4 * Copyright (C) 2017 webtrees development team
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16namespace Fisharebest\Webtrees;
17
18use Fisharebest\Webtrees\Functions\FunctionsPrintFacts;
19use League\Glide\Urls\UrlBuilderFactory;
20
21/**
22 * A GEDCOM media (OBJE) object.
23 */
24class Media extends GedcomRecord {
25	const RECORD_TYPE = 'OBJE';
26	const URL_PREFIX  = 'mediaviewer.php?mid=';
27
28	/** @var string The "TITL" value from the GEDCOM */
29	private $title = '';
30
31	/** @var string The "FILE" value from the GEDCOM */
32	private $file = '';
33
34	/**
35	 * Create a GedcomRecord object from raw GEDCOM data.
36	 *
37	 * @param string      $xref
38	 * @param string      $gedcom  an empty string for new/pending records
39	 * @param string|null $pending null for a record with no pending edits,
40	 *                             empty string for records with pending deletions
41	 * @param Tree        $tree
42	 */
43	public function __construct($xref, $gedcom, $pending, $tree) {
44		parent::__construct($xref, $gedcom, $pending, $tree);
45
46		if (preg_match('/\n1 FILE (.+)/', $gedcom . $pending, $match)) {
47			$this->file = $match[1];
48		}
49		if (preg_match('/\n\d TITL (.+)/', $gedcom . $pending, $match)) {
50			$this->title = $match[1];
51		}
52	}
53
54	/**
55	 * Each object type may have its own special rules, and re-implement this function.
56	 *
57	 * @param int $access_level
58	 *
59	 * @return bool
60	 */
61	protected function canShowByType($access_level) {
62		// Hide media objects if they are attached to private records
63		$linked_ids = Database::prepare(
64			"SELECT l_from FROM `##link` WHERE l_to = ? AND l_file = ?"
65		)->execute([
66			$this->xref, $this->tree->getTreeId(),
67		])->fetchOneColumn();
68		foreach ($linked_ids as $linked_id) {
69			$linked_record = GedcomRecord::getInstance($linked_id, $this->tree);
70			if ($linked_record && !$linked_record->canShow($access_level)) {
71				return false;
72			}
73		}
74
75		// ... otherwise apply default behaviour
76		return parent::canShowByType($access_level);
77	}
78
79	/**
80	 * Fetch data from the database
81	 *
82	 * @param string $xref
83	 * @param int    $tree_id
84	 *
85	 * @return null|string
86	 */
87	protected static function fetchGedcomRecord($xref, $tree_id) {
88		return Database::prepare(
89			"SELECT m_gedcom FROM `##media` WHERE m_id = :xref AND m_file = :tree_id"
90		)->execute([
91			'xref'    => $xref,
92			'tree_id' => $tree_id,
93		])->fetchOne();
94	}
95
96	/**
97	 * Get the first note attached to this media object
98	 *
99	 * @return null|string
100	 */
101	public function getNote() {
102		$note = $this->getFirstFact('NOTE');
103		if ($note) {
104			$text = $note->getValue();
105			if (preg_match('/^@' . WT_REGEX_XREF . '@$/', $text)) {
106				$text = $note->getTarget()->getNote();
107			}
108
109			return $text;
110		} else {
111			return '';
112		}
113	}
114
115	/**
116	 * Get the main media filename
117	 *
118	 * @return string
119	 */
120	public function getFilename() {
121		return $this->file;
122	}
123
124	/**
125	 * Get the media's title (name)
126	 *
127	 * @return string
128	 */
129	public function getTitle() {
130		return $this->title;
131	}
132
133	/**
134	 * Get the filename on the server - for those (very few!) functions which actually
135	 * need the filename, such as mediafirewall.php and the PDF reports.
136	 *
137	 * @return string
138	 */
139	public function getServerFilename() {
140		$MEDIA_DIRECTORY = $this->tree->getPreference('MEDIA_DIRECTORY');
141
142		if ($this->isExternal() || !$this->file) {
143			// External image, or (in the case of corrupt GEDCOM data) no image at all
144			return $this->file;
145		} else {
146			// Main image
147			return WT_DATA_DIR . $MEDIA_DIRECTORY . $this->file;
148		}
149	}
150
151	/**
152	 * check if the file exists on this server
153	 *
154	 * @return bool
155	 */
156	public function fileExists() {
157		return file_exists($this->getServerFilename());
158	}
159
160	/**
161	 * Determine if the file is an external url
162	 *
163	 * @return bool
164	 */
165	public function isExternal() {
166		return strpos($this->file, '://') !== false;
167	}
168
169	/**
170	 * get the media file size in KB
171	 *
172	 * @return string
173	 */
174	public function getFilesize() {
175		$size = $this->getFilesizeraw();
176		// Round up to the nearest KB.
177		$size = (int) (($size + 1023) / 1024);
178
179		return /* I18N: size of file in KB */
180			I18N::translate('%s KB', I18N::number($size));
181	}
182
183	/**
184	 * get the media file size, unformatted
185	 *
186	 * @return int
187	 */
188	public function getFilesizeraw() {
189		try {
190			return filesize($this->getServerFilename());
191		} catch (\ErrorException $ex) {
192			return 0;
193		}
194	}
195
196	/**
197	 * Deprecated? This does not need to be a function here.
198	 *
199	 * @return string
200	 */
201	public function getMediaType() {
202		if (preg_match('/\n\d TYPE (.+)/', $this->gedcom, $match)) {
203			return strtolower($match[1]);
204		} else {
205			return '';
206		}
207	}
208
209	/**
210	 * get image properties
211	 *
212	 * @return array
213	 */
214	public function getImageAttributes() {
215		$imgsize = [];
216		if ($this->fileExists()) {
217			try {
218				$imgsize = getimagesize($this->getServerFilename());
219				if (is_array($imgsize) && !empty($imgsize['0'])) {
220					// this is an image
221					$imageTypes      = ['', 'GIF', 'JPG', 'PNG', 'SWF', 'PSD', 'BMP', 'TIFF', 'TIFF', 'JPC', 'JP2', 'JPX', 'JB2', 'SWC', 'IFF', 'WBMP', 'XBM'];
222					$imgsize['ext']  = $imageTypes[0 + $imgsize[2]];
223					// this is for display purposes, always show non-adjusted info
224					$imgsize['WxH']  = /* I18N: image dimensions, width × height */
225						I18N::translate('%1$s × %2$s pixels', I18N::number($imgsize['0']), I18N::number($imgsize['1']));
226				}
227			} catch (\ErrorException $ex) {
228				// Not an image, or not a valid image?
229				$imgsize = false;
230			}
231		}
232
233		if (!is_array($imgsize) || empty($imgsize['0'])) {
234			// this is not an image, OR the file doesn’t exist OR it is a url
235			$imgsize[0]       = 0;
236			$imgsize[1]       = 0;
237			$imgsize['ext']   = '';
238			$imgsize['mime']  = '';
239			$imgsize['WxH']   = '';
240		}
241
242		if (empty($imgsize['mime'])) {
243			// this is not an image, OR the file doesn’t exist OR it is a url
244			// set file type equal to the file extension - can’t use parse_url because this may not be a full url
245			$exp            = explode('?', $this->file);
246			$imgsize['ext'] = strtoupper(pathinfo($exp[0], PATHINFO_EXTENSION));
247			// all mimetypes we wish to serve with the media firewall must be added to this array.
248			$mime = [
249				'DOC' => 'application/msword',
250				'MOV' => 'video/quicktime',
251				'MP3' => 'audio/mpeg',
252				'PDF' => 'application/pdf',
253				'PPT' => 'application/vnd.ms-powerpoint',
254				'RTF' => 'text/rtf',
255				'SID' => 'image/x-mrsid',
256				'TXT' => 'text/plain',
257				'XLS' => 'application/vnd.ms-excel',
258				'WMV' => 'video/x-ms-wmv',
259			];
260			if (empty($mime[$imgsize['ext']])) {
261				// if we don’t know what the mimetype is, use something ambiguous
262				$imgsize['mime'] = 'application/octet-stream';
263				if ($this->fileExists()) {
264					// alert the admin if we cannot determine the mime type of an existing file
265					// as the media firewall will be unable to serve this file properly
266					Log::addMediaLog('Media Firewall error: >Unknown Mimetype< for file >' . $this->file . '<');
267				}
268			} else {
269				$imgsize['mime'] = $mime[$imgsize['ext']];
270			}
271		}
272
273		return $imgsize;
274	}
275
276	/**
277	 * Generate a URL for an image.
278	 *
279	 * @param int    $width  Maximum width in pixels
280	 * @param int    $height Maximum height in pixels
281	 * @param string $fit    "crop" or "contain"
282	 *
283	 * @return string
284	 */
285	public function imageUrl($width, $height, $fit) {
286		// Sign the URL, to protect against mass-resize attacks.
287		$glide_key = Site::getPreference('glide-key');
288		if (empty($glide_key)) {
289			$glide_key = bin2hex(random_bytes(128));
290			Site::setPreference('glide-key', $glide_key);
291		}
292
293		if (Auth::accessLevel($this->getTree()) > $this->getTree()->getPreference('SHOW_NO_WATERMARK')) {
294			$mark = 'watermark.png';
295		} else {
296			$mark = '';
297		}
298
299		$url = UrlBuilderFactory::create(WT_BASE_URL, $glide_key)
300			->getUrl('mediafirewall.php', [
301				'mid'       => $this->getXref(),
302				'ged'       => $this->tree->getName(),
303				'w'         => $width,
304				'h'         => $height,
305				'fit'       => $fit,
306				'mark'      => $mark,
307				'markh'     => '100h',
308				'markw'     => '100w',
309				'markalpha' => 25,
310				'or'        => 0, // Intervention uses exif_read_data() which is very buggy.
311			]);
312
313		return $url;
314	}
315
316	/**
317	 * What file extension is used by this file?
318	 *
319	 * @return string
320	 */
321	public function extension() {
322		if (preg_match('/\.([a-zA-Z0-9]+)$/', $this->file, $match)) {
323			return strtolower($match[1]);
324		} else {
325			return '';
326		}
327	}
328
329	/**
330	 * What is the mime-type of this object?
331	 * For simplicity and efficiency, use the extension, rather than the contents.
332	 *
333	 * @return string
334	 */
335	public function mimeType() {
336		// Themes contain icon definitions for some/all of these mime-types
337		switch ($this->extension()) {
338		case 'bmp':
339			return 'image/bmp';
340		case 'doc':
341			return 'application/msword';
342		case 'docx':
343			return 'application/msword';
344		case 'ged':
345			return 'text/x-gedcom';
346		case 'gif':
347			return 'image/gif';
348		case 'htm':
349			return 'text/html';
350		case 'html':
351			return 'text/html';
352		case 'jpeg':
353			return 'image/jpeg';
354		case 'jpg':
355			return 'image/jpeg';
356		case 'mov':
357			return 'video/quicktime';
358		case 'mp3':
359			return 'audio/mpeg';
360		case 'mp4':
361			return 'video/mp4';
362		case 'ogv':
363			return 'video/ogg';
364		case 'pdf':
365			return 'application/pdf';
366		case 'png':
367			return 'image/png';
368		case 'rar':
369			return 'application/x-rar-compressed';
370		case 'swf':
371			return 'application/x-shockwave-flash';
372		case 'svg':
373			return 'image/svg';
374		case 'tif':
375			return 'image/tiff';
376		case 'tiff':
377			return 'image/tiff';
378		case 'xls':
379			return 'application/vnd-ms-excel';
380		case 'xlsx':
381			return 'application/vnd-ms-excel';
382		case 'wmv':
383			return 'video/x-ms-wmv';
384		case 'zip':
385			return 'application/zip';
386		default:
387			return 'application/octet-stream';
388		}
389	}
390
391	/**
392	 * Display an image-thumbnail or a media-icon, and add markup for image viewers such as colorbox.
393	 *
394	 * @param int      $width      Pixels
395	 * @param int      $height     Pixels
396	 * @param string   $fit        "crop" or "contain"
397	 * @param string[] $attributes Additional HTML attributes
398	 *
399	 * @return string
400	 */
401	public function displayImage($width, $height, $fit, $attributes = []) {
402		// Default image for external, missing or corrupt images.
403		$image
404			= '<i' .
405			' dir="auto"' . // For the tool-tip
406			' class="icon-mime-' . str_replace('/', '-', $this->mimeType()) . '"' .
407			' title="' . strip_tags($this->getFullName()) . '"' .
408			'></i>';
409
410		// Use a thumbnail image.
411		if ($this->isExternal()) {
412			$src    = $this->getFilename();
413			$srcset = [];
414		} else {
415			// Generate multiple images for displays with higher pixel densities.
416			$src    = $this->imageUrl($width, $height, $fit);
417			$srcset = [];
418			foreach ([2, 3, 4] as $x) {
419				$srcset[] = $this->imageUrl($width * $x, $height * $x, $fit) . ' ' . $x . 'x';
420			}
421		}
422
423		$image = '<img ' . Html::attributes($attributes + [
424					'dir'    => 'auto',
425					'src'    => $src,
426					'srcset' => implode(',', $srcset),
427					'alt'    => strip_tags($this->getFullName()),
428				]) . '>';
429
430		$attributes = Html::attributes([
431			'class' => 'gallery',
432			'type'  => $this->mimeType(),
433			'href'  => $this->imageUrl(0, 0, ''),
434		]);
435
436		return '<a ' . $attributes . '>' . $image . '</a>';
437	}
438
439	/**
440	 * If this object has no name, what do we call it?
441	 *
442	 * @return string
443	 */
444	public function getFallBackName() {
445		if ($this->canShow()) {
446			return basename($this->file);
447		} else {
448			return $this->getXref();
449		}
450	}
451
452	/**
453	 * Extract names from the GEDCOM record.
454	 */
455	public function extractNames() {
456		// Earlier gedcom versions had level 1 titles
457		// Later gedcom versions had level 2 titles
458		$this->extractNamesFromFacts(2, 'TITL', $this->getFacts('FILE'));
459		$this->extractNamesFromFacts(1, 'TITL', $this->getFacts('TITL'));
460	}
461
462	/**
463	 * This function should be redefined in derived classes to show any major
464	 * identifying characteristics of this record.
465	 *
466	 * @return string
467	 */
468	public function formatListDetails() {
469		ob_start();
470		FunctionsPrintFacts::printMediaLinks('1 OBJE @' . $this->getXref() . '@', 1);
471
472		return ob_get_clean();
473	}
474}
475