?i»?
Your IP : 52.15.88.130
<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Christopher Schäpers <kondou@ts.unde.re>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Olivier Mehani <shtrom@ssji.net>
* @author Robin Appelman <robin@icewind.nl>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Thomas Müller <thomas.mueller@tmit.eu>
*
* @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 ' . $this->user->getUID());
throw new NotFoundException();
}
}
if($this->config->getUserValue($this->user->getUID(), 'avatar', 'generated', null) === null) {
$generated = $this->folder->fileExists('generated') ? 'true' : 'false';
$this->config->setUserValue($this->user->getUID(), 'avatar', 'generated', $generated);
}
return $file;
}
/**
* Get the extension of the avatar. If there is no avatar throw Exception
*
* @return string
* @throws NotFoundException
*/
private function getExtension() {
if ($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) {
$text = mb_strtoupper(mb_substr($userDisplayName, 0, 1), 'UTF-8');
$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.ttf';
$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();
}
}