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Added letter based avatar provider

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This commit is contained in:
Frederic Guillot
2016-03-19 11:17:58 -04:00
parent fa86542f90
commit 9d4ba1471d
11 changed files with 238 additions and 9 deletions
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4
app/Core/User/Avatar/AvatarManager.php
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@@ -5,7 +5,7 @@ namespace Kanboard\Core\User\Avatar;
/**
* Avatar Manager
*
* @package user
* @package avatar
* @author Frederic Guillot
*/
class AvatarManager
@@ -51,6 +51,8 @@ class AvatarManager
'email' => $email,
);
krsort($this->providers);
foreach ($this->providers as $provider) {
if ($provider->isActive($user)) {
return $provider->render($user, $size);

2
app/Helper/UserHelper.php
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@@ -171,7 +171,7 @@ class UserHelper extends Base
*/
public function avatar($user_id, $username, $name, $email)
{
$html = $this->avatarManager->render($user_id, $username, $name, $email, 25);
$html = $this->avatarManager->render($user_id, $username, $name, $email, 48);
return '<div class="avatar">'.$html.'</div>';
}
}

2
app/ServiceProvider/AvatarProvider.php
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@@ -6,6 +6,7 @@ use Pimple\Container;
use Pimple\ServiceProviderInterface;
use Kanboard\Core\User\Avatar\AvatarManager;
use Kanboard\User\Avatar\GravatarProvider;
use Kanboard\User\Avatar\LetterAvatarProvider;
/**
* Avatar Provider
@@ -25,6 +26,7 @@ class AvatarProvider implements ServiceProviderInterface
public function register(Container $container)
{
$container['avatarManager'] = new AvatarManager;
$container['avatarManager']->register(new LetterAvatarProvider($container));
$container['avatarManager']->register(new GravatarProvider($container));
return $container;
}

6
app/User/Avatar/GravatarProvider.php
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@@ -5,6 +5,12 @@ namespace Kanboard\User\Avatar;
use Kanboard\Core\Base;
use Kanboard\Core\User\Avatar\AvatarProviderInterface;
/**
* Gravatar Avatar Provider
*
* @package avatar
* @author Frederic Guillot
*/
class GravatarProvider extends Base implements AvatarProviderInterface
{
/**

169
app/User/Avatar/LetterAvatarProvider.php Normal file
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@@ -0,0 +1,169 @@
<?php
namespace Kanboard\User\Avatar;
use Kanboard\Core\Base;
use Kanboard\Core\User\Avatar\AvatarProviderInterface;
/**
* Letter Avatar Provider
*
* The color hash algorithm is backported from the Javascript library color-hash
* Source: https://github.com/zenozeng/color-hash
* Author: Zeno Zeng (MIT License)
*
* @package avatar
* @author Frederic Guillot
*/
class LetterAvatarProvider extends Base implements AvatarProviderInterface
{
protected $lightness = array(0.35, 0.5, 0.65);
protected $saturation = array(0.35, 0.5, 0.65);
/**
* Render avatar html
*
* @access public
* @param array $user
* @param int $size
*/
public function render(array $user, $size)
{
$initials = $this->helper->user->getInitials($user['name'] ?: $user['username']);
$rgb = $this->getBackgroundColor($initials);
return sprintf(
'<div class="avatar-letter" style="background-color: rgb(%d, %d, %d)" title="%s">%s</div>',
$rgb[0],
$rgb[1],
$rgb[2],
$this->helper->text->e($user['name'] ?: $user['username']),
$initials
);
}
/**
* Determine if the provider is active
*
* @access public
* @param array $user
* @return boolean
*/
public function isActive(array $user)
{
return true;
}
/**
* Get background color based on a string
*
* @param string $str
* @return array
*/
public function getBackgroundColor($str)
{
$hsl = $this->getHSL($str);
return $this->getRGB($hsl[0], $hsl[1], $hsl[2]);
}
/**
* Convert HSL to RGB
*
* @access protected
* @param integer $hue Hue ∈ [0, 360)
* @param integer $saturation Saturation ∈ [0, 1]
* @param integer $lightness Lightness ∈ [0, 1]
* @return array
*/
protected function getRGB($hue, $saturation, $lightness)
{
$hue /= 360;
$q = $lightness < 0.5 ? $lightness * (1 + $saturation) : $lightness + $saturation - $lightness * $saturation;
$p = 2 * $lightness - $q;
return array_map(function ($color) use ($q, $p) {
if ($color < 0) {
$color++;
}
if ($color > 1) {
$color--;
}
if ($color < 1/6) {
$color = $p + ($q - $p) * 6 * $color;
} else if ($color < 0.5) {
$color = $q;
} else if ($color < 2/3) {
$color = $p + ($q - $p) * 6 * (2/3 - $color);
} else {
$color = $p;
}
return round($color * 255);
}, array($hue + 1/3, $hue, $hue - 1/3));
}
/**
* Returns the hash in [h, s, l].
* Note that H ∈ [0, 360); S ∈ [0, 1]; L ∈ [0, 1];
*
* @access protected
* @param string $str
* @return int[]
*/
protected function getHSL($str)
{
$hash = $this->hash($str);
$hue = $hash % 359;
$hash = intval($hash / 360);
$saturation = $this->saturation[$hash % count($this->saturation)];
$hash = intval($hash / count($this->saturation));
$lightness = $this->lightness[$hash % count($this->lightness)];
return array($hue, $saturation, $lightness);
}
/**
* BKDR Hash (modified version)
*
* @access protected
* @param string $str
* @return integer
*/
protected function hash($str)
{
$seed = 131;
$seed2 = 137;
$hash = 0;
// Make hash more sensitive for short string like 'a', 'b', 'c'
$str .= 'x';
$max = intval(9007199254740991 / $seed2);
for ($i = 0, $ilen = mb_strlen($str); $i < $ilen; $i++) {
if ($hash > $max) {
$hash = intval($hash / $seed2);
}
$hash = $hash * $seed + $this->getCharCode($str[$i]);
}
return $hash;
}
/**
* Backport of Javascript function charCodeAt()
*
* @access protected
* @param string $c
* @return integer
*/
protected function getCharCode($c)
{
list(, $ord) = unpack('N', mb_convert_encoding($c, 'UCS-4BE', 'UTF-8'));
return $ord;
}
}