Avatar::mixPalette() - Code Metrics - Inspection of "Merge pull request #10248 from weeman1337/enhancem..." - nextcloud/server - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — master ( b69b17...32a6f4 )

by Morris

created 2019-02-07 13:24 UTC

Avatar::mixPalette() A

↳ Parent: Avatar

Complexity

Conditions	2
Paths	2

Size

Total Lines	10
Code Lines	8

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	2
eloc	8
nc	2
nop	3
dl	0
loc	10
rs	10
c	0
b	0
f	0

<?php
declare(strict_types=1);
/**
 * @copyright Copyright (c) 2016, ownCloud, Inc.
 * @copyright 2018 John Molakvoæ <[email protected]>
 *
 * @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]>
 * @author John Molakvoæ <[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\Avatar;

use OC\Color;
use OCP\Files\NotFoundException;
use OCP\IAvatar;
use OCP\ILogger;
use OC_Image;
use Imagick;

/**
 * This class gets and sets users avatars.
 */
abstract class Avatar implements IAvatar {

	/** @var ILogger  */
	protected $logger;

	/**
	 * https://github.com/sebdesign/cap-height -- for 500px height
	 * Automated check: https://codepen.io/skjnldsv/pen/PydLBK/
	 * Nunito cap-height is 0.716 and we want a 200px caps height size
	 * (0.4 letter-to-total-height ratio, 500*0.4=200), so: 200/0.716 = 279px.
	 * Since we start from the baseline (text-anchor) we need to
	 * shift the y axis by 100px (half the caps height): 500/2+100=350
	 *
	 * @var string
	 */
	private $svgTemplate = '<?xml version="1.0" encoding="UTF-8" standalone="no"?>
		<svg width="{size}" height="{size}" version="1.1" viewBox="0 0 500 500" xmlns="http://www.w3.org/2000/svg">
			<rect width="100%" height="100%" fill="#{fill}"></rect>
			<text x="50%" y="350" style="font-weight:normal;font-size:279px;font-family:\'Nunito\';text-anchor:middle;fill:#fff">{letter}</text>
		</svg>';

	/**
	 * The base avatar constructor.
	 *
	 * @param ILogger $logger The logger
	 */
	public function __construct(ILogger $logger) {
		$this->logger = $logger;
	}

	/**
	 * Returns the user display name.
	 *
	 * @return string
	 */
	abstract public function getDisplayName(): string;

	/**
	 * Returns the first letter of the display name, or "?" if no name given.
	 *
	 * @return string
	 */
	private function getAvatarLetter(): string {
		$displayName = $this->getDisplayName();
		if (empty($displayName) === true) {
			return '?';
		} else {
			return mb_strtoupper(mb_substr($displayName, 0, 1), 'UTF-8');
		}
	}

	/**
	 * @inheritdoc
	 */
	public function get($size = 64) {
		$size = (int) $size;

		try {
			$file = $this->getFile($size);
		} catch (NotFoundException $e) {
			return false;
		}

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

	/**
	 * {size} = 500
	 * {fill} = hex color to fill
	 * {letter} = Letter to display
	 *
	 * Generate SVG avatar
	 *
	 * @param int $size The requested image size in pixel
	 * @return string
	 *
	 */
	protected function getAvatarVector(int $size): string {
		$userDisplayName = $this->getDisplayName();
		$bgRGB = $this->avatarBackgroundColor($userDisplayName);
		$bgHEX = sprintf("%02x%02x%02x", $bgRGB->r, $bgRGB->g, $bgRGB->b);
		$letter = $this->getAvatarLetter();
		$toReplace = ['{size}', '{fill}', '{letter}'];
		return str_replace($toReplace, [$size, $bgHEX, $letter], $this->svgTemplate);
	}

	/**
	 * Generate png avatar from svg with Imagick
	 *
	 * @param int $size
	 * @return string|boolean
	 */
	protected function generateAvatarFromSvg(int $size) {
		if (!extension_loaded('imagick')) {
			return false;
		}
		try {
			$font = __DIR__ . '/../../core/fonts/Nunito-Regular.ttf';
			$svg = $this->getAvatarVector($size);
			$avatar = new Imagick();
			$avatar->setFont($font);
			$avatar->readImageBlob($svg);
			$avatar->setImageFormat('png');
			$image = new OC_Image();
			$image->loadFromData($avatar);
			return $image->data();
		} catch (\Exception $e) {
			return false;
		}
	}

	/**
	 * Generate png avatar with GD
	 *
	 * @param string $userDisplayName
	 * @param int $size
	 * @return string
	 */
	protected function generateAvatar($userDisplayName, $size) {
		$letter = $this->getAvatarLetter();
		$backgroundColor = $this->avatarBackgroundColor($userDisplayName);

		$im = imagecreatetruecolor($size, $size);
		$background = imagecolorallocate(
			$im,
			$backgroundColor->r,
			$backgroundColor->g,
			$backgroundColor->b
		);
		$white = imagecolorallocate($im, 255, 255, 255);
		imagefilledrectangle($im, 0, 0, $size, $size, $background);

		$font = __DIR__ . '/../../../core/fonts/Nunito-Regular.ttf';

		$fontSize = $size * 0.4;
		list($x, $y) = $this->imageTTFCenter(
			$im, $letter, $font, (int)$fontSize
		);

		imagettftext($im, $fontSize, 0, $x, $y, $white, $font, $letter);

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

		return $data;
	}

	/**
	 * Calculate real image ttf center
	 *
	 * @param resource $image
	 * @param string $text text string
	 * @param string $font font path
	 * @param int $size font size
	 * @param int $angle
	 * @return array
	 */
	protected function imageTTFCenter(
		$image,
		string $text,
		string $font,
		int $size,
		$angle = 0
	): array {
		// Image width & height
		$xi = imagesx($image);
		$yi = imagesy($image);

		// bounding box
		$box = imagettfbbox($size, $angle, $font, $text);

		// imagettfbbox can return negative int
		$xr = abs(max($box[2], $box[4]));
		$yr = abs(max($box[5], $box[7]));

		// calculate bottom left placement
		$x = intval(($xi - $xr) / 2);
		$y = intval(($yi + $yr) / 2);

		return array($x, $y);
	}

	/**
	 * Calculate steps between two Colors
	 * @param object Color $steps start color
	 * @param object Color $ends end color
	 * @return array [r,g,b] steps for each color to go from $steps to $ends
	 */
	private function stepCalc($steps, $ends) {
		$step = array();
		$step[0] = ($ends[1]->r - $ends[0]->r) / $steps;
		$step[1] = ($ends[1]->g - $ends[0]->g) / $steps;
		$step[2] = ($ends[1]->b - $ends[0]->b) / $steps;
		return $step;
	}

	/**
	 * Convert a string to an integer evenly
	 * @param string $hash the text to parse
	 * @param int $maximum the maximum range
	 * @return int[] between 0 and $maximum
	 */
	private function mixPalette($steps, $color1, $color2) {
		$palette = array($color1);
		$step = $this->stepCalc($steps, [$color1, $color2]);
		for ($i = 1; $i < $steps; $i++) {
			$r = intval($color1->r + ($step[0] * $i));
			$g = intval($color1->g + ($step[1] * $i));
			$b = intval($color1->b + ($step[2] * $i));
			$palette[] = new Color($r, $g, $b);
		}
		return $palette;

	}

	/**
	 * Convert a string to an integer evenly
	 * @param string $hash the text to parse
	 * @param int $maximum the maximum range
	 * @return int between 0 and $maximum
	 */
	private function hashToInt($hash, $maximum) {
		$final = 0;
		$result = array();

		// Splitting evenly the string
		for ($i = 0; $i < strlen($hash); $i++) {
			// chars in md5 goes up to f, hex:16
			$result[] = intval(substr($hash, $i, 1), 16) % 16;
		}
		// Adds up all results
		foreach ($result as $value) {
			$final += $value;
		}
		// chars in md5 goes up to f, hex:16
		return intval($final % $maximum);
	}

	/**
	 * @param string $hash
	 * @return Color Object containting r g b int in the range [0, 255]
	 */
	public function avatarBackgroundColor(string $hash) {
		// Normalize hash
		$hash = strtolower($hash);

		// Already a md5 hash?
		if( preg_match('/^([0-9a-f]{4}-?){8}$/', $hash, $matches) !== 1 ) {
			$hash = md5($hash);
		}

		// Remove unwanted char
		$hash = preg_replace('/[^0-9a-f]+/', '', $hash);

		$red = new Color(182, 70, 157);
		$yellow = new Color(221, 203, 85);
		$blue = new Color(0, 130, 201); // Nextcloud blue

		// Number of steps to go from a color to another
		// 3 colors * 6 will result in 18 generated colors
		$steps = 6;

		$palette1 = $this->mixPalette($steps, $red, $yellow);
		$palette2 = $this->mixPalette($steps, $yellow, $blue);
		$palette3 = $this->mixPalette($steps, $blue, $red);

		$finalPalette = array_merge($palette1, $palette2, $palette3);

		return $finalPalette[$this->hashToInt($hash, $steps * 3)];
	}
}


1			<?php
2			declare(strict_types=1);
3			/**
4			* @copyright Copyright (c) 2016, ownCloud, Inc.
5			* @copyright 2018 John Molakvoæ <[email protected]>
6			*
7			* @author Arthur Schiwon <[email protected]>
8			* @author Christopher Schäpers <[email protected]>
9			* @author Lukas Reschke <[email protected]>
10			* @author Morris Jobke <[email protected]>
11			* @author Olivier Mehani <[email protected]>
12			* @author Robin Appelman <[email protected]>
13			* @author Roeland Jago Douma <[email protected]>
14			* @author Thomas Müller <[email protected]>
15			* @author John Molakvoæ <[email protected]>
16			*
17			* @license AGPL-3.0
18			*
19			* This code is free software: you can redistribute it and/or modify
20			* it under the terms of the GNU Affero General Public License, version 3,
21			* as published by the Free Software Foundation.
22			*
23			* This program is distributed in the hope that it will be useful,
24			* but WITHOUT ANY WARRANTY; without even the implied warranty of
25			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26			* GNU Affero General Public License for more details.
27			*
28			* You should have received a copy of the GNU Affero General Public License, version 3,
29			* along with this program. If not, see <http://www.gnu.org/licenses/>
30			*
31			*/
32
33			namespace OC\Avatar;
34
35			use OC\Color;
36			use OCP\Files\NotFoundException;
37			use OCP\IAvatar;
38			use OCP\ILogger;
39			use OC_Image;
40			use Imagick;
41
42			/**
43			* This class gets and sets users avatars.
44			*/
45			abstract class Avatar implements IAvatar {
46
47			/** @var ILogger */
48			protected $logger;
49
50			/**
51			* https://github.com/sebdesign/cap-height -- for 500px height
52			* Automated check: https://codepen.io/skjnldsv/pen/PydLBK/
53			* Nunito cap-height is 0.716 and we want a 200px caps height size
54			* (0.4 letter-to-total-height ratio, 500*0.4=200), so: 200/0.716 = 279px.
55			* Since we start from the baseline (text-anchor) we need to
56			* shift the y axis by 100px (half the caps height): 500/2+100=350
57			*
58			* @var string
59			*/
60			private $svgTemplate = '<?xml version="1.0" encoding="UTF-8" standalone="no"?>
61			<svg width="{size}" height="{size}" version="1.1" viewBox="0 0 500 500" xmlns="http://www.w3.org/2000/svg">
62			<rect width="100%" height="100%" fill="#{fill}"></rect>
63			<text x="50%" y="350" style="font-weight:normal;font-size:279px;font-family:\'Nunito\';text-anchor:middle;fill:#fff">{letter}</text>
64			</svg>';
65
66			/**
67			* The base avatar constructor.
68			*
69			* @param ILogger $logger The logger
70			*/
71			public function __construct(ILogger $logger) {
72			$this->logger = $logger;
73			}
74
75			/**
76			* Returns the user display name.
77			*
78			* @return string
79			*/
80			abstract public function getDisplayName(): string;
81
82			/**
83			* Returns the first letter of the display name, or "?" if no name given.
84			*
85			* @return string
86			*/
87			private function getAvatarLetter(): string {
88			$displayName = $this->getDisplayName();
89			if (empty($displayName) === true) {
90			return '?';
91			} else {
92			return mb_strtoupper(mb_substr($displayName, 0, 1), 'UTF-8');
93			}
94			}
95
96			/**
97			* @inheritdoc
98			*/
99			public function get($size = 64) {
100			$size = (int) $size;
101
102			try {
103			$file = $this->getFile($size);
104			} catch (NotFoundException $e) {
105			return false;
106			}
107
108			$avatar = new OC_Image();
109			$avatar->loadFromData($file->getContent());
110			return $avatar;
111			}
112
113			/**
114			* {size} = 500
115			* {fill} = hex color to fill
116			* {letter} = Letter to display
117			*
118			* Generate SVG avatar
119			*
120			* @param int $size The requested image size in pixel
121			* @return string
122			*
123			*/
124			protected function getAvatarVector(int $size): string {
125			$userDisplayName = $this->getDisplayName();
126			$bgRGB = $this->avatarBackgroundColor($userDisplayName);
127			$bgHEX = sprintf("%02x%02x%02x", $bgRGB->r, $bgRGB->g, $bgRGB->b);
128			$letter = $this->getAvatarLetter();
129			$toReplace = ['{size}', '{fill}', '{letter}'];
130			return str_replace($toReplace, [$size, $bgHEX, $letter], $this->svgTemplate);
131			}
132
133			/**
134			* Generate png avatar from svg with Imagick
135			*
136			* @param int $size
137			* @return string\|boolean
138			*/
139			protected function generateAvatarFromSvg(int $size) {
140			if (!extension_loaded('imagick')) {
141			return false;
142			}
143			try {
144			$font = __DIR__ . '/../../core/fonts/Nunito-Regular.ttf';
145			$svg = $this->getAvatarVector($size);
146			$avatar = new Imagick();
147			$avatar->setFont($font);
148			$avatar->readImageBlob($svg);
149			$avatar->setImageFormat('png');
150			$image = new OC_Image();
151			$image->loadFromData($avatar);
152			return $image->data();
153			} catch (\Exception $e) {
154			return false;
155			}
156			}
157
158			/**
159			* Generate png avatar with GD
160			*
161			* @param string $userDisplayName
162			* @param int $size
163			* @return string
164			*/
165			protected function generateAvatar($userDisplayName, $size) {
166			$letter = $this->getAvatarLetter();
167			$backgroundColor = $this->avatarBackgroundColor($userDisplayName);
168
169			$im = imagecreatetruecolor($size, $size);
170			$background = imagecolorallocate(
171			$im,
172			$backgroundColor->r,
173			$backgroundColor->g,
174			$backgroundColor->b
175			);
176			$white = imagecolorallocate($im, 255, 255, 255);
177			imagefilledrectangle($im, 0, 0, $size, $size, $background);
178
179			$font = __DIR__ . '/../../../core/fonts/Nunito-Regular.ttf';
180
181			$fontSize = $size * 0.4;
182			list($x, $y) = $this->imageTTFCenter(
183			$im, $letter, $font, (int)$fontSize
184			);
185
186			imagettftext($im, $fontSize, 0, $x, $y, $white, $font, $letter);
187
188			ob_start();
189			imagepng($im);
190			$data = ob_get_contents();
191			ob_end_clean();
192
193			return $data;
194			}
195
196			/**
197			* Calculate real image ttf center
198			*
199			* @param resource $image
200			* @param string $text text string
201			* @param string $font font path
202			* @param int $size font size
203			* @param int $angle
204			* @return array
205			*/
206			protected function imageTTFCenter(
207			$image,
208			string $text,
209			string $font,
210			int $size,
211			$angle = 0
212			): array {
213			// Image width & height
214			$xi = imagesx($image);
215			$yi = imagesy($image);
216
217			// bounding box
218			$box = imagettfbbox($size, $angle, $font, $text);
219
220			// imagettfbbox can return negative int
221			$xr = abs(max($box[2], $box[4]));
222			$yr = abs(max($box[5], $box[7]));
223
224			// calculate bottom left placement
225			$x = intval(($xi - $xr) / 2);
226			$y = intval(($yi + $yr) / 2);
227
228			return array($x, $y);
229			}
230
231			/**
232			* Calculate steps between two Colors
233			* @param object Color $steps start color
234			* @param object Color $ends end color
235			* @return array [r,g,b] steps for each color to go from $steps to $ends
236			*/
237			private function stepCalc($steps, $ends) {
238			$step = array();
239			$step[0] = ($ends[1]->r - $ends[0]->r) / $steps;
240			$step[1] = ($ends[1]->g - $ends[0]->g) / $steps;
241			$step[2] = ($ends[1]->b - $ends[0]->b) / $steps;
242			return $step;
243			}
244
245			/**
246			* Convert a string to an integer evenly
247			* @param string $hash the text to parse
248			* @param int $maximum the maximum range
249			* @return int[] between 0 and $maximum
250			*/
251			private function mixPalette($steps, $color1, $color2) {
252			$palette = array($color1);
253			$step = $this->stepCalc($steps, [$color1, $color2]);
254			for ($i = 1; $i < $steps; $i++) {
255			$r = intval($color1->r + ($step[0] * $i));
256			$g = intval($color1->g + ($step[1] * $i));
257			$b = intval($color1->b + ($step[2] * $i));
258			$palette[] = new Color($r, $g, $b);
259			}
260			return $palette;
			0 ignored issues – show Bug Best Practice introduced 2019-02-07 13:34 UTC by Report Bug Copy Issue Report The expression `return $palette` returns an array which contains values of type `OC\Color` which are incompatible with the documented value type `integer`. Loading history...
261			}
262
263			/**
264			* Convert a string to an integer evenly
265			* @param string $hash the text to parse
266			* @param int $maximum the maximum range
267			* @return int between 0 and $maximum
268			*/
269			private function hashToInt($hash, $maximum) {
270			$final = 0;
271			$result = array();
272
273			// Splitting evenly the string
274			for ($i = 0; $i < strlen($hash); $i++) {
275			// chars in md5 goes up to f, hex:16
276			$result[] = intval(substr($hash, $i, 1), 16) % 16;
277			}
278			// Adds up all results
279			foreach ($result as $value) {
280			$final += $value;
281			}
282			// chars in md5 goes up to f, hex:16
283			return intval($final % $maximum);
284			}
285
286			/**
287			* @param string $hash
288			* @return Color Object containting r g b int in the range [0, 255]
289			*/
290			public function avatarBackgroundColor(string $hash) {
291			// Normalize hash
292			$hash = strtolower($hash);
293
294			// Already a md5 hash?
295			if( preg_match('/^([0-9a-f]{4}-?){8}$/', $hash, $matches) !== 1 ) {
296			$hash = md5($hash);
297			}
298
299			// Remove unwanted char
300			$hash = preg_replace('/[^0-9a-f]+/', '', $hash);
301
302			$red = new Color(182, 70, 157);
303			$yellow = new Color(221, 203, 85);
304			$blue = new Color(0, 130, 201); // Nextcloud blue
305
306			// Number of steps to go from a color to another
307			// 3 colors * 6 will result in 18 generated colors
308			$steps = 6;
309
310			$palette1 = $this->mixPalette($steps, $red, $yellow);
311			$palette2 = $this->mixPalette($steps, $yellow, $blue);
312			$palette3 = $this->mixPalette($steps, $blue, $red);
313
314			$finalPalette = array_merge($palette1, $palette2, $palette3);
315
316			return $finalPalette[$this->hashToInt($hash, $steps * 3)];
317			}
318			}
319

nextcloud / server

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Avatar::mixPalette() A

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