Avatar::get() - Code Metrics - Inspection of "Better handle avatars" - nextcloud/server - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#7498)

by Julius

created 2017-12-19 17:49 UTC

Avatar::get() A

↳ Parent: Avatar

Complexity

Conditions	2
Paths	2

Size

Total Lines	11
Code Lines	8

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	2
eloc	8
nc	2
nop	1
dl	0
loc	11
rs	9.4285
c	0
b	0
f	0

<?php
/**
 * @copyright Copyright (c) 2016, ownCloud, Inc.
 *
 * @author Arthur Schiwon <[email protected]>
 * @author Christopher Schäpers <[email protected]>
 * @author Lukas Reschke <[email protected]>
 * @author Morris Jobke <[email protected]>
 * @author Olivier Mehani <[email protected]>
 * @author Robin Appelman <[email protected]>
 * @author Roeland Jago Douma <[email protected]>
 * @author Thomas Müller <[email protected]>
 *
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */

namespace OC;

use OC\User\User;
use OCP\Files\NotFoundException;
use OCP\Files\NotPermittedException;
use OCP\Files\SimpleFS\ISimpleFile;
use OCP\Files\SimpleFS\ISimpleFolder;
use OCP\IAvatar;
use OCP\IConfig;
use OCP\IImage;
use OCP\IL10N;
use OC_Image;
use OCP\ILogger;

/**
 * This class gets and sets users avatars.
 */

class Avatar implements IAvatar {
	/** @var ISimpleFolder */
	private $folder;
	/** @var IL10N */
	private $l;
	/** @var User */
	private $user;
	/** @var ILogger  */
	private $logger;
	/** @var IConfig */
	private $config;

	/**
	 * constructor
	 *
	 * @param ISimpleFolder $folder The folder where the avatars are
	 * @param IL10N $l
	 * @param User $user
	 * @param ILogger $logger
	 * @param IConfig $config
	 */
	public function __construct(ISimpleFolder $folder,
								IL10N $l,
								$user,
								ILogger $logger,
								IConfig $config) {
		$this->folder = $folder;
		$this->l = $l;
		$this->user = $user;
		$this->logger = $logger;
		$this->config = $config;
	}

	/**
	 * @inheritdoc
	 */
	public function get ($size = 64) {
		try {
			$file = $this->getFile($size);
		} catch (NotFoundException $e) {
			return false;
		}

		$avatar = new OC_Image();
		$avatar->loadFromData($file->getContent());
		return $avatar;
	}

	/**
	 * Check if an avatar exists for the user
	 *
	 * @return bool
	 */
	public function exists() {

		return $this->folder->fileExists('avatar.jpg') || $this->folder->fileExists('avatar.png');
	}

	/**
	 * sets the users avatar
	 * @param IImage|resource|string $data An image object, imagedata or path to set a new avatar
	 * @throws \Exception if the provided file is not a jpg or png image
	 * @throws \Exception if the provided image is not valid
	 * @throws NotSquareException if the image is not square
	 * @return void
	*/
	public function set ($data) {

		if($data instanceOf IImage) {
			$img = $data;
			$data = $img->data();
		} else {
			$img = new OC_Image($data);
		}
		$type = substr($img->mimeType(), -3);
		if ($type === 'peg') {
			$type = 'jpg';
		}
		if ($type !== 'jpg' && $type !== 'png') {
			throw new \Exception($this->l->t('Unknown filetype'));
		}

		if (!$img->valid()) {
			throw new \Exception($this->l->t('Invalid image'));
		}

		if (!($img->height() === $img->width())) {
			throw new NotSquareException($this->l->t('Avatar image is not square'));
		}

		$this->remove();
		$file = $this->folder->newFile('avatar.'.$type);
		$file->putContent($data);


		try {
			$generated = $this->folder->getFile('generated');
			$this->config->setUserValue($this->user->getUID(), 'avatar', 'generated', 'false');
			$generated->delete();
		} catch (NotFoundException $e) {
			//
		}
		$this->user->triggerChange('avatar', $file);
	}

	/**
	 * remove the users avatar
	 * @return void
	*/
	public function remove () {
		$avatars = $this->folder->getDirectoryListing();

		$this->config->setUserValue($this->user->getUID(), 'avatar', 'version',
			(int)$this->config->getUserValue($this->user->getUID(), 'avatar', 'version', 0) + 1);

		foreach ($avatars as $avatar) {
			$avatar->delete();
		}
		$this->config->setUserValue($this->user->getUID(), 'avatar', 'generated', 'true');
		$this->user->triggerChange('avatar', '');
	}

	/**
	 * @inheritdoc
	 */
	public function getFile($size) {
		try {
			$ext = $this->getExtension();
		} catch (NotFoundException $e) {
			$data = $this->generateAvatar($this->user->getDisplayName(), 1024);
			$avatar = $this->folder->newFile('avatar.png');
			$avatar->putContent($data);
			$ext = 'png';

			$this->folder->newFile('generated');
			$this->config->setUserValue($this->user->getUID(), 'avatar', 'generated', 'true');
		}

		if ($size === -1) {
			$path = 'avatar.' . $ext;
		} else {
			$path = 'avatar.' . $size . '.' . $ext;
		}

		try {
			$file = $this->folder->getFile($path);
		} catch (NotFoundException $e) {
			if ($size <= 0) {
				throw new NotFoundException;
			}

			if ($this->folder->fileExists('generated')) {
				$data = $this->generateAvatar($this->user->getDisplayName(), $size);

			} else {
				$avatar = new OC_Image();
				/** @var ISimpleFile $file */
				$file = $this->folder->getFile('avatar.' . $ext);
				$avatar->loadFromData($file->getContent());
				$avatar->resize($size);
				$data = $avatar->data();
			}

			try {
				$file = $this->folder->newFile($path);
				$file->putContent($data);
			} catch (NotPermittedException $e) {
				$this->logger->error('Failed to save avatar for ' . $this->user->getUID());
				throw new NotFoundException();
			}

		}

		return $file;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
	}

	/**
	 * Get the extension of the avatar. If there is no avatar throw Exception
	 *
	 * @return string
	 * @throws NotFoundException
	 */
	private function getExtension() {
		if ($this->folder->fileExists('avatar.jpg')) {
			return 'jpg';
		} elseif ($this->folder->fileExists('avatar.png')) {
			return 'png';
		}
		throw new NotFoundException;
	}

	/**
	 * @param string $userDisplayName
	 * @param int $size
	 * @return string
	 */
	private function generateAvatar($userDisplayName, $size) {
		$text = strtoupper(substr($userDisplayName, 0, 1));
		$backgroundColor = $this->avatarBackgroundColor($userDisplayName);

		$im = imagecreatetruecolor($size, $size);
		$background = imagecolorallocate($im, $backgroundColor[0], $backgroundColor[1], $backgroundColor[2]);
		$white = imagecolorallocate($im, 255, 255, 255);
		imagefilledrectangle($im, 0, 0, $size, $size, $background);

		$font = __DIR__ . '/../../core/fonts/OpenSans-Semibold.woff';

		$fontSize = $size * 0.4;
		$box = imagettfbbox($fontSize, 0, $font, $text);

		$x = ($size - ($box[2] - $box[0])) / 2;
		$y = ($size - ($box[1] - $box[7])) / 2;
		$x += 1;
		$y -= $box[7];
		imagettftext($im, $fontSize, 0, $x, $y, $white, $font, $text);

		ob_start();
		imagepng($im);
		$data = ob_get_contents();
		ob_end_clean();

		return $data;
	}

	/**
	 * @param int $r
	 * @param int $g
	 * @param int $b
	 * @return double[] Array containing h s l in [0, 1] range
	 */
	private function rgbToHsl($r, $g, $b) {
		$r /= 255.0;
		$g /= 255.0;
		$b /= 255.0;

		$max = max($r, $g, $b);
		$min = min($r, $g, $b);


		$h = ($max + $min) / 2.0;
		$l = ($max + $min) / 2.0;

		if($max === $min) {
			$h = $s = 0; // Achromatic
		} else {
			$d = $max - $min;
			$s = $l > 0.5 ? $d / (2 - $max - $min) : $d / ($max + $min);
			switch($max) {
				case $r:
					$h = ($g - $b) / $d + ($g < $b ? 6 : 0);
					break;
				case $g:
					$h = ($b - $r) / $d + 2.0;
					break;
				case $b:
					$h = ($r - $g) / $d + 4.0;
					break;
			}
			$h /= 6.0;
		}
		return [$h, $s, $l];

	}

	/**
	 * @param string $text
	 * @return int[] Array containting r g b in the range [0, 255]
	 */
	private function avatarBackgroundColor($text) {
		$hash = preg_replace('/[^0-9a-f]+/', '', $text);

		$hash = md5($hash);
		$hashChars = str_split($hash);


		// Init vars
		$result = ['0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0'];
		$rgb = [0, 0, 0];
		$sat = 0.70;
		$lum = 0.68;
		$modulo = 16;


		// Splitting evenly the string
		foreach($hashChars as  $i => $char) {
			$result[$i % $modulo] .= intval($char, 16);
		}

		// Converting our data into a usable rgb format
		// Start at 1 because 16%3=1 but 15%3=0 and makes the repartition even
		for($count = 1; $count < $modulo; $count++) {
			$rgb[$count%3] += (int)$result[$count];
		}

		// Reduce values bigger than rgb requirements
		$rgb[0] %= 255;
		$rgb[1] %= 255;
		$rgb[2] %= 255;

		$hsl = $this->rgbToHsl($rgb[0], $rgb[1], $rgb[2]);

		// Classic formula to check the brightness for our eye
		// If too bright, lower the sat
		$bright = sqrt(0.299 * ($rgb[0] ** 2) + 0.587 * ($rgb[1] ** 2) + 0.114 * ($rgb[2] ** 2));
		if ($bright >= 200) {
			$sat = 0.60;
		}

		return $this->hslToRgb($hsl[0], $sat, $lum);
	}

	/**
	 * @param double $h Hue in range [0, 1]
	 * @param double $s Saturation in range [0, 1]
	 * @param double $l Lightness in range [0, 1]
	 * @return int[] Array containing r g b in the range [0, 255]
	 */
	private function hslToRgb($h, $s, $l){
		$hue2rgb = function ($p, $q, $t){
			if($t < 0) {
				$t += 1;
			}
			if($t > 1) {
				$t -= 1;
			}
			if($t < 1/6) {
				return $p + ($q - $p) * 6 * $t;
			}
			if($t < 1/2) {
				return $q;
			}
			if($t < 2/3) {
				return $p + ($q - $p) * (2/3 - $t) * 6;
			}
			return $p;
		};

		if($s === 0){
			$r = $l;
			$g = $l;
			$b = $l; // achromatic
		}else{
			$q = $l < 0.5 ? $l * (1 + $s) : $l + $s - $l * $s;
			$p = 2 * $l - $q;
			$r = $hue2rgb($p, $q, $h + 1/3);
			$g = $hue2rgb($p, $q, $h);
			$b = $hue2rgb($p, $q, $h - 1/3);
		}

		return array(round($r * 255), round($g * 255), round($b * 255));
	}

	public function userChanged($feature, $oldValue, $newValue) {
		// We only change the avatar on display name changes
		if ($feature !== 'displayName') {
			return;
		}

		// If the avatar is not generated (so an uploaded image) we skip this
		if (!$this->folder->fileExists('generated')) {
			return;
		}

		$this->remove();
	}

}


1		<?php
2		/**
3		* @copyright Copyright (c) 2016, ownCloud, Inc.
4		*
5		* @author Arthur Schiwon <[email protected]>
6		* @author Christopher Schäpers <[email protected]>
7		* @author Lukas Reschke <[email protected]>
8		* @author Morris Jobke <[email protected]>
9		* @author Olivier Mehani <[email protected]>
10		* @author Robin Appelman <[email protected]>
11		* @author Roeland Jago Douma <[email protected]>
12		* @author Thomas Müller <[email protected]>
13		*
14		* @license AGPL-3.0
15		*
16		* This code is free software: you can redistribute it and/or modify
17		* it under the terms of the GNU Affero General Public License, version 3,
18		* as published by the Free Software Foundation.
19		*
20		* This program is distributed in the hope that it will be useful,
21		* but WITHOUT ANY WARRANTY; without even the implied warranty of
22		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23		* GNU Affero General Public License for more details.
24		*
25		* You should have received a copy of the GNU Affero General Public License, version 3,
26		* along with this program. If not, see <http://www.gnu.org/licenses/>
27		*
28		*/
29
30		namespace OC;
31
32		use OC\User\User;
33		use OCP\Files\NotFoundException;
34		use OCP\Files\NotPermittedException;
35		use OCP\Files\SimpleFS\ISimpleFile;
36		use OCP\Files\SimpleFS\ISimpleFolder;
37		use OCP\IAvatar;
38		use OCP\IConfig;
39		use OCP\IImage;
40		use OCP\IL10N;
41		use OC_Image;
42		use OCP\ILogger;
43
44		/**
45		* This class gets and sets users avatars.
46		*/
47
48		class Avatar implements IAvatar {
49		/** @var ISimpleFolder */
50		private $folder;
51		/** @var IL10N */
52		private $l;
53		/** @var User */
54		private $user;
55		/** @var ILogger */
56		private $logger;
57		/** @var IConfig */
58		private $config;
59
60		/**
61		* constructor
62		*
63		* @param ISimpleFolder $folder The folder where the avatars are
64		* @param IL10N $l
65		* @param User $user
66		* @param ILogger $logger
67		* @param IConfig $config
68		*/
69		public function __construct(ISimpleFolder $folder,
70		IL10N $l,
71		$user,
72		ILogger $logger,
73		IConfig $config) {
74		$this->folder = $folder;
75		$this->l = $l;
76		$this->user = $user;
77		$this->logger = $logger;
78		$this->config = $config;
79		}
80
81		/**
82		* @inheritdoc
83		*/
84		public function get ($size = 64) {
85		try {
86		$file = $this->getFile($size);
87		} catch (NotFoundException $e) {
88		return false;
89		}
90
91		$avatar = new OC_Image();
92		$avatar->loadFromData($file->getContent());
93		return $avatar;
94		}
95
96		/**
97		* Check if an avatar exists for the user
98		*
99		* @return bool
100		*/
101		public function exists() {
102
103		return $this->folder->fileExists('avatar.jpg') \|\| $this->folder->fileExists('avatar.png');
104		}
105
106		/**
107		* sets the users avatar
108		* @param IImage\|resource\|string $data An image object, imagedata or path to set a new avatar
109		* @throws \Exception if the provided file is not a jpg or png image
110		* @throws \Exception if the provided image is not valid
111		* @throws NotSquareException if the image is not square
112		* @return void
113		*/
114		public function set ($data) {
115
116		if($data instanceOf IImage) {
117		$img = $data;
118		$data = $img->data();
119		} else {
120		$img = new OC_Image($data);
121		}
122		$type = substr($img->mimeType(), -3);
123		if ($type === 'peg') {
124		$type = 'jpg';
125		}
126		if ($type !== 'jpg' && $type !== 'png') {
127		throw new \Exception($this->l->t('Unknown filetype'));
128		}
129
130		if (!$img->valid()) {
131		throw new \Exception($this->l->t('Invalid image'));
132		}
133
134		if (!($img->height() === $img->width())) {
135		throw new NotSquareException($this->l->t('Avatar image is not square'));
136		}
137
138		$this->remove();
139		$file = $this->folder->newFile('avatar.'.$type);
140		$file->putContent($data);
		0 ignored issues – show Bug introduced 2017-10-20 18:33 UTC by Report Bug Copy Issue Report It seems like `$data` defined by parameter `$data` on line 114 can also be of type `resource`; however, `OCP\Files\SimpleFS\ISimpleFile::putContent()` does only seem to accept `string`, maybe add an additional type check? This check looks at variables that have been passed in as parameters and are passed out again to other methods. If the outgoing method call has stricter type requirements than the method itself, an issue is raised. An additional type check may prevent trouble. Loading history...
141
142		try {
143		$generated = $this->folder->getFile('generated');
144		$this->config->setUserValue($this->user->getUID(), 'avatar', 'generated', 'false');
145		$generated->delete();
146		} catch (NotFoundException $e) {
147		//
148		}
149		$this->user->triggerChange('avatar', $file);
150		}
151
152		/**
153		* remove the users avatar
154		* @return void
155		*/
156		public function remove () {
157		$avatars = $this->folder->getDirectoryListing();
158
159		$this->config->setUserValue($this->user->getUID(), 'avatar', 'version',
160		(int)$this->config->getUserValue($this->user->getUID(), 'avatar', 'version', 0) + 1);
161
162		foreach ($avatars as $avatar) {
163		$avatar->delete();
164		}
165		$this->config->setUserValue($this->user->getUID(), 'avatar', 'generated', 'true');
166		$this->user->triggerChange('avatar', '');
167		}
168
169		/**
170		* @inheritdoc
171		*/
172		public function getFile($size) {
173		try {
174		$ext = $this->getExtension();
175		} catch (NotFoundException $e) {
176		$data = $this->generateAvatar($this->user->getDisplayName(), 1024);
177		$avatar = $this->folder->newFile('avatar.png');
178		$avatar->putContent($data);
179		$ext = 'png';
180
181		$this->folder->newFile('generated');
182		$this->config->setUserValue($this->user->getUID(), 'avatar', 'generated', 'true');
183		}
184
185		if ($size === -1) {
186		$path = 'avatar.' . $ext;
187		} else {
188		$path = 'avatar.' . $size . '.' . $ext;
189		}
190
191		try {
192		$file = $this->folder->getFile($path);
193		} catch (NotFoundException $e) {
194		if ($size <= 0) {
195		throw new NotFoundException;
196		}
197
198		if ($this->folder->fileExists('generated')) {
199		$data = $this->generateAvatar($this->user->getDisplayName(), $size);
200
201		} else {
202		$avatar = new OC_Image();
203		/** @var ISimpleFile $file */
204		$file = $this->folder->getFile('avatar.' . $ext);
205		$avatar->loadFromData($file->getContent());
206		$avatar->resize($size);
207		$data = $avatar->data();
208		}
209
210		try {
211		$file = $this->folder->newFile($path);
212		$file->putContent($data);
213		} catch (NotPermittedException $e) {
214		$this->logger->error('Failed to save avatar for ' . $this->user->getUID());
215		throw new NotFoundException();
216		}
217
218		}
219
220		return $file;
		0 ignored issues – show Bug Best Practice introduced 2017-10-20 18:21 UTC by Report Bug Copy Issue Report The return type of `return $file;` (`OCP\Files\SimpleFS\ISimpleFile`) is incompatible with the return type declared by the interface `OCP\IAvatar::getFile` of type `OCP\Files\File`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
221		}
222
223		/**
224		* Get the extension of the avatar. If there is no avatar throw Exception
225		*
226		* @return string
227		* @throws NotFoundException
228		*/
229		private function getExtension() {
230		if ($this->folder->fileExists('avatar.jpg')) {
231		return 'jpg';
232		} elseif ($this->folder->fileExists('avatar.png')) {
233		return 'png';
234		}
235		throw new NotFoundException;
236		}
237
238		/**
239		* @param string $userDisplayName
240		* @param int $size
241		* @return string
242		*/
243		private function generateAvatar($userDisplayName, $size) {
244		$text = strtoupper(substr($userDisplayName, 0, 1));
245		$backgroundColor = $this->avatarBackgroundColor($userDisplayName);
246
247		$im = imagecreatetruecolor($size, $size);
248		$background = imagecolorallocate($im, $backgroundColor[0], $backgroundColor[1], $backgroundColor[2]);
249		$white = imagecolorallocate($im, 255, 255, 255);
250		imagefilledrectangle($im, 0, 0, $size, $size, $background);
251
252		$font = __DIR__ . '/../../core/fonts/OpenSans-Semibold.woff';
253
254		$fontSize = $size * 0.4;
255		$box = imagettfbbox($fontSize, 0, $font, $text);
256
257		$x = ($size - ($box[2] - $box[0])) / 2;
258		$y = ($size - ($box[1] - $box[7])) / 2;
259		$x += 1;
260		$y -= $box[7];
261		imagettftext($im, $fontSize, 0, $x, $y, $white, $font, $text);
262
263		ob_start();
264		imagepng($im);
265		$data = ob_get_contents();
266		ob_end_clean();
267
268		return $data;
269		}
270
271		/**
272		* @param int $r
273		* @param int $g
274		* @param int $b
275		* @return double[] Array containing h s l in [0, 1] range
276		*/
277		private function rgbToHsl($r, $g, $b) {
278		$r /= 255.0;
279		$g /= 255.0;
280		$b /= 255.0;
281
282		$max = max($r, $g, $b);
283		$min = min($r, $g, $b);
284
285
286		$h = ($max + $min) / 2.0;
287		$l = ($max + $min) / 2.0;
288
289		if($max === $min) {
290		$h = $s = 0; // Achromatic
291		} else {
292		$d = $max - $min;
293		$s = $l > 0.5 ? $d / (2 - $max - $min) : $d / ($max + $min);
294		switch($max) {
295		case $r:
296		$h = ($g - $b) / $d + ($g < $b ? 6 : 0);
297		break;
298		case $g:
299		$h = ($b - $r) / $d + 2.0;
300		break;
301		case $b:
302		$h = ($r - $g) / $d + 4.0;
303		break;
304		}
305		$h /= 6.0;
306		}
307		return [$h, $s, $l];
308
309		}
310
311		/**
312		* @param string $text
313		* @return int[] Array containting r g b in the range [0, 255]
314		*/
315		private function avatarBackgroundColor($text) {
316		$hash = preg_replace('/[^0-9a-f]+/', '', $text);
317
318		$hash = md5($hash);
319		$hashChars = str_split($hash);
320
321
322		// Init vars
323		$result = ['0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0'];
324		$rgb = [0, 0, 0];
325		$sat = 0.70;
326		$lum = 0.68;
327		$modulo = 16;
328
329
330		// Splitting evenly the string
331		foreach($hashChars as $i => $char) {
332		$result[$i % $modulo] .= intval($char, 16);
333		}
334
335		// Converting our data into a usable rgb format
336		// Start at 1 because 16%3=1 but 15%3=0 and makes the repartition even
337		for($count = 1; $count < $modulo; $count++) {
338		$rgb[$count%3] += (int)$result[$count];
339		}
340
341		// Reduce values bigger than rgb requirements
342		$rgb[0] %= 255;
343		$rgb[1] %= 255;
344		$rgb[2] %= 255;
345
346		$hsl = $this->rgbToHsl($rgb[0], $rgb[1], $rgb[2]);
347
348		// Classic formula to check the brightness for our eye
349		// If too bright, lower the sat
350		$bright = sqrt(0.299 * ($rgb[0] ** 2) + 0.587 * ($rgb[1] ** 2) + 0.114 * ($rgb[2] ** 2));
351		if ($bright >= 200) {
352		$sat = 0.60;
353		}
354
355		return $this->hslToRgb($hsl[0], $sat, $lum);
356		}
357
358		/**
359		* @param double $h Hue in range [0, 1]
360		* @param double $s Saturation in range [0, 1]
361		* @param double $l Lightness in range [0, 1]
362		* @return int[] Array containing r g b in the range [0, 255]
363		*/
364		private function hslToRgb($h, $s, $l){
365		$hue2rgb = function ($p, $q, $t){
366		if($t < 0) {
367		$t += 1;
368		}
369		if($t > 1) {
370		$t -= 1;
371		}
372	View Code Duplication	if($t < 1/6) {
373		return $p + ($q - $p) * 6 * $t;
374		}
375		if($t < 1/2) {
376		return $q;
377		}
378	View Code Duplication	if($t < 2/3) {
379		return $p + ($q - $p) * (2/3 - $t) * 6;
380		}
381		return $p;
382		};
383
384		if($s === 0){
385		$r = $l;
386		$g = $l;
387		$b = $l; // achromatic
388		}else{
389		$q = $l < 0.5 ? $l * (1 + $s) : $l + $s - $l * $s;
390		$p = 2 * $l - $q;
391		$r = $hue2rgb($p, $q, $h + 1/3);
392		$g = $hue2rgb($p, $q, $h);
393		$b = $hue2rgb($p, $q, $h - 1/3);
394		}
395
396		return array(round($r * 255), round($g * 255), round($b * 255));
397		}
398
399		public function userChanged($feature, $oldValue, $newValue) {
400		// We only change the avatar on display name changes
401		if ($feature !== 'displayName') {
402		return;
403		}
404
405		// If the avatar is not generated (so an uploaded image) we skip this
406		if (!$this->folder->fileExists('generated')) {
407		return;
408		}
409
410		$this->remove();
411		}
412
413		}
414

nextcloud / server

Pull Request — master (#7498)

Avatar::get() A

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