Added letter based avatar provider

11 files changed, 238 insertions, 9 deletions

diff --git a/ChangeLog b/ChangeLog
index ef24f486..63eb3f0e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -3,6 +3,7 @@ Version 1.0.27 (unreleased)
 
 Improvements:
 
+* Added letter avatar provider
 * Added pluggable Avatar providers
 * Improve task summary sections
 * Put back the action sidebar in task view
diff --git a/Makefile b/Makefile
index 50c5a06d..82ef4b72 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 BUILD_DIR = /tmp
 
-CSS_APP = $(addprefix assets/css/src/, $(addsuffix .css, base links title table form button alert tooltip header board task comment subtask tasklink markdown listing activity dashboard pagination popover confirm sidebar responsive dropdown upload filters gantt project files views accordion))
+CSS_APP = $(addprefix assets/css/src/, $(addsuffix .css, base links title table form button alert tooltip header board task comment subtask tasklink markdown listing activity dashboard pagination popover confirm sidebar responsive dropdown upload filters gantt project files views accordion avatar))
 CSS_PRINT = $(addprefix assets/css/src/, $(addsuffix .css, print links table board task comment subtask tasklink markdown))
 CSS_VENDOR = $(addprefix assets/css/vendor/, $(addsuffix .css, jquery-ui.min jquery-ui-timepicker-addon.min chosen.min fullcalendar.min font-awesome.min c3.min))
 
diff --git a/app/Core/User/Avatar/AvatarManager.php b/app/Core/User/Avatar/AvatarManager.php
index 4b0c5298..afaf79d2 100644
--- a/app/Core/User/Avatar/AvatarManager.php
+++ b/app/Core/User/Avatar/AvatarManager.php
@@ -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, $size);
diff --git a/app/Helper/UserHelper.php b/app/Helper/UserHelper.php
index 24ac591f..90f84033 100644
--- a/app/Helper/UserHelper.php
+++ b/app/Helper/UserHelper.php
@@ -171,7 +171,7 @@ class UserHelper extends Base
      */
     public function avatar($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>';
     }
 }
diff --git a/app/ServiceProvider/AvatarProvider.php b/app/ServiceProvider/AvatarProvider.php
index 2bbc9c03..73d37d5c 100644
--- a/app/ServiceProvider/AvatarProvider.php
+++ b/app/ServiceProvider/AvatarProvider.php
@@ -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;
     }
diff --git a/app/User/Avatar/GravatarProvider.php b/app/User/Avatar/GravatarProvider.php
index 10ab4390..7a719734 100644
--- a/app/User/Avatar/GravatarProvider.php
+++ b/app/User/Avatar/GravatarProvider.php
@@ -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
 {
     /**
diff --git a/app/User/Avatar/LetterAvatarProvider.php b/app/User/Avatar/LetterAvatarProvider.php
new file mode 100644
index 00000000..81c4586d
--- /dev/null
+++ b/app/User/Avatar/LetterAvatarProvider.php
@@ -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;
+    }
+}
diff --git a/assets/css/app.css b/assets/css/app.css
index 83699df1..0d40dcfd 100644
--- a/assets/css/app.css
+++ b/assets/css/app.css
@@ -18,4 +18,4 @@
  *  Font Awesome 4.5.0 by @davegandy - http://fontawesome.io - @fontawesome
  *  License - http://fontawesome.io/license (Font: SIL OFL 1.1, CSS: MIT License)
  */@font-face{font-family:'FontAwesome';src:url('../fonts/fontawesome-webfont.eot?v=4.5.0');src:url('../fonts/fontawesome-webfont.eot?#iefix&v=4.5.0') format('embedded-opentype'),url('../fonts/fontawesome-webfont.woff2?v=4.5.0') format('woff2'),url('../fonts/fontawesome-webfont.woff?v=4.5.0') format('woff'),url('../fonts/fontawesome-webfont.ttf?v=4.5.0') format('truetype'),url('../fonts/fontawesome-webfont.svg?v=4.5.0#fontawesomeregular') format('svg');font-weight:normal;font-style:normal}.fa{display:inline-block;font:normal normal normal 14px/1 FontAwesome;font-size:inherit;text-rendering:auto;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.fa-lg{font-size:1.33333333em;line-height:.75em;vertical-align:-15%}.fa-2x{font-size:2em}.fa-3x{font-size:3em}.fa-4x{font-size:4em}.fa-5x{font-size:5em}.fa-fw{width:1.28571429em;text-align:center}.fa-ul{padding-left:0;margin-left:2.14285714em;list-style-type:none}.fa-ul>li{position:relative}.fa-li{position:absolute;left:-2.14285714em;width:2.14285714em;top:.14285714em;text-align:center}.fa-li.fa-lg{left:-1.85714286em}.fa-border{padding:.2em .25em .15em;border:solid .08em #eee;border-radius:.1em}.fa-pull-left{float:left}.fa-pull-right{float:right}.fa.fa-pull-left{margin-right:.3em}.fa.fa-pull-right{margin-left:.3em}.pull-right{float:right}.pull-left{float:left}.fa.pull-left{margin-right:.3em}.fa.pull-right{margin-left:.3em}.fa-spin{-webkit-animation:fa-spin 2s infinite linear;animation:fa-spin 2s infinite linear}.fa-pulse{-webkit-animation:fa-spin 1s infinite steps(8);animation:fa-spin 1s infinite steps(8)}@-webkit-keyframes fa-spin{0%{-webkit-transform:rotate(0deg);transform:rotate(0deg)}100%{-webkit-transform:rotate(359deg);transform:rotate(359deg)}}@keyframes fa-spin{0%{-webkit-transform:rotate(0deg);transform:rotate(0deg)}100%{-webkit-transform:rotate(359deg);transform:rotate(359deg)}}.fa-rotate-90{filter:progid:DXImageTransform.Microsoft.BasicImage(rotation=1);-webkit-transform:rotate(90deg);-ms-transform:rotate(90deg);transform:rotate(90deg)}.fa-rotate-180{filter:progid:DXImageTransform.Microsoft.BasicImage(rotation=2);-webkit-transform:rotate(180deg);-ms-transform:rotate(180deg);transform:rotate(180deg)}.fa-rotate-270{filter:progid:DXImageTransform.Microsoft.BasicImage(rotation=3);-webkit-transform:rotate(270deg);-ms-transform:rotate(270deg);transform:rotate(270deg)}.fa-flip-horizontal{filter:progid:DXImageTransform.Microsoft.BasicImage(rotation=0, mirror=1);-webkit-transform:scale(-1, 1);-ms-transform:scale(-1, 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a{color:#333;font-weight:bold}.sidebar-icons li{padding-left:0}.sidebar-icons li:hover,.sidebar-icons li.active{padding-left:0;border-left:0}.sidebar li.active a:focus,.sidebar li.active a:hover{color:#555}.sidebar li:last-child{margin-bottom:15px}@media only screen and (max-width:1024px){body{font-size:.85em}.form-tab{max-width:404px}.form-inline-group input[type="submit"],.form-inline-group label{display:block}.form-inline-group input[type="submit"]{margin-top:20px}td>input[type="text"]{max-width:150px}.page-header .form-input-large{width:300px}}@media only screen and (max-width:1024px) and (orientation:landscape){header{padding-bottom:4px}div.chosen-container{font-size:.9em}input[type="number"],input[type="date"],input[type="email"],input[type="password"],input[type="text"]{height:18px}.page-header .form-input-large{width:300px}}@media only screen and (max-width:640px){.hide-mobile{display:none}}.dropdown{display:inline;position:relative}.dropdown ul{display:none}ul.dropdown-submenu-open{display:block;position:absolute;z-index:1000;min-width:285px;list-style:none;margin:3px 0 0 1px;padding:6px 0;background-color:#fff;border:1px solid #b2b2b2;border-radius:3px;box-shadow:0 1px 3px rgba(0,0,0,0.15)}.textarea-dropdown li,.dropdown-submenu-open li{display:block;margin:0;padding:0;padding-left:10px;padding-right:10px;padding-top:8px;padding-bottom:8px;font-size:.85em;border-bottom:1px solid #f8f8f8;cursor:pointer}.dropdown-submenu-open li.no-hover{cursor:default}.textarea-dropdown li:last-child,.dropdown-submenu-open li:last-child{border:0}.textarea-dropdown .active,.textarea-dropdown li:hover,.dropdown-submenu-open li:not(.no-hover):hover{background:#4078c0;color:#fff}.textarea-dropdown .active a,.textarea-dropdown li:hover a,.dropdown-submenu-open li:hover a{color:#fff}.textarea-dropdown a,.dropdown-submenu-open a{text-decoration:none;color:#333}.dropdown-submenu-open a:focus{text-decoration:underline}.page-header .dropdown{padding-right:10px}.dropdown-menu-link-text,.dropdown-menu-link-icon{color:#333;text-decoration:none}.dropdown-menu-link-text:hover{text-decoration:underline}.textarea-dropdown{list-style:none;margin:3px 0 0 1px;padding:6px 0;background-color:#fff;border:1px solid #b2b2b2;border-radius:3px;box-shadow:0 1px 3px rgba(0,0,0,0.15)}#file-dropzone,#screenshot-zone{position:relative;border:2px dashed #ccc;width:99%;height:250px;overflow:auto}#file-dropzone-inner,#screenshot-inner{position:absolute;left:0;bottom:48%;width:100%;text-align:center;color:#aaa}#screenshot-zone.screenshot-pasted{border:2px solid #333}#file-list{margin:20px}#file-list li{list-style-type:none;padding-top:8px;padding-bottom:8px;border-bottom:1px dotted #ddd;width:95%}#file-list li.file-error{font-weight:bold;color:#b94a48}.project-header{margin-top:8px;margin-bottom:20px}.filter-box{display:inline-block;position:relative;font-size:0;margin-bottom:20px}.project-header .filter-box{margin:0}.filter-box 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a{line-height:27px}div.ganttview-hzheader-month,div.ganttview-hzheader-day,div.ganttview-vtheader,div.ganttview-vtheader-item-name,div.ganttview-vtheader-series,div.ganttview-grid,div.ganttview-grid-row-cell{float:left}div.ganttview-hzheader-month,div.ganttview-hzheader-day{text-align:center}div.ganttview-grid-row-cell.last,div.ganttview-hzheader-day.last,div.ganttview-hzheader-month.last{border-right:0}div.ganttview{border:1px solid #999}div.ganttview-hzheader-month{width:60px;height:20px;border-right:1px solid #d0d0d0;line-height:20px;overflow:hidden}div.ganttview-hzheader-day{width:20px;height:20px;border-right:1px solid #f0f0f0;border-top:1px solid #d0d0d0;line-height:20px;color:#777}div.ganttview-vtheader{margin-top:41px;width:400px;overflow:hidden;background-color:#fff}div.ganttview-vtheader-item{color:#666}div.ganttview-vtheader-series-name{width:400px;height:31px;line-height:31px;padding-left:3px;border-top:1px solid 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silver;border-radius:3px}.ganttview-block-movable{cursor:move}div.ganttview-block-not-defined{border-color:#000;background-color:#000}div.ganttview-block-text{position:absolute;height:12px;font-size:.7em;color:#999;padding:2px 3px}div.ganttview-block div.ui-resizable-handle.ui-resizable-s{bottom:-0}.project-creation-options{max-width:500px;border-left:3px dotted #efefef;margin-top:20px;padding-left:15px;padding-bottom:5px;padding-top:5px}.project-overview-columns{display:-webkit-flex;display:flex;-webkit-flex-direction:row;flex-direction:row;-webkit-flex-wrap:wrap;flex-wrap:wrap;-webkit-align-items:center;align-items:center;-webkit-justify-content:center;justify-content:center;margin-bottom:20px;font-size:1.4em}.project-overview-column{text-align:center;margin-right:80px}.project-overview-column strong{font-size:1.3em;color:#444}.project-overview-column span{font-size:.8em;color:#777}.file-thumbnails{display:-webkit-flex;display:flex;-webkit-flex-direction:row;flex-direction:row;-webkit-flex-wrap:wrap;flex-wrap:wrap;-webkit-justify-content:flex-start;justify-content:flex-start}.file-thumbnail{width:250px;border:1px solid #efefef;border-radius:5px;margin-bottom:20px;box-shadow:4px 2px 10px -6px rgba(0,0,0,0.55);margin-right:15px}.file-thumbnail img{border-top-left-radius:5px;border-top-right-radius:5px}.file-thumbnail img:hover{opacity:.5}.file-thumbnail-content{padding-left:8px;padding-right:8px}.file-thumbnail-title{font-weight:700;font-size:.9em;color:#555}.file-thumbnail-description{font-size:.8em;color:#aaa;margin-top:8px;margin-bottom:5px}.file-viewer{position:relative}.file-viewer img{max-width:95%;max-height:85%;margin-top:10px}.views{display:inline-block;margin-left:10px;margin-right:10px;font-size:.9em}.views li{border:1px solid #eee;padding-left:8px;padding-right:8px;padding-top:5px;padding-bottom:5px;display:inline}.menu-inline li.active a,.views li.active a{font-weight:bold;color:#000;text-decoration:none}.views li:first-child{border-right:0;border-top-left-radius:5px;border-bottom-left-radius:5px}.views li:last-child{border-left:0;border-top-right-radius:5px;border-bottom-right-radius:5px}.accordion-title{background:url(data:image/png;base64,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) repeat-x scroll 0 10px}.accordion-title h3{display:inline;padding-right:5px;background:#fff}.accordion-content{margin-top:15px;margin-bottom:25px}.accordion-toggle{color:#333;text-decoration:none}.accordion-toggle:focus,.accordion-toggle:hover{color:#999}.accordion-toggle:before{content:"\f0d7"}.accordion-collapsed .accordion-toggle:before{content:"\f0da"}.accordion-collapsed{margin-bottom:25px}.accordion-collapsed .accordion-content{display:none}.avatar{float:left;margin-right:10px}.avatar img,.avatar div{border-radius:30px}.avatar-letter{color:#fff;line-height:48px;width:48px;font-size:25px;text-align:center}
\ No newline at end of file
diff --git a/assets/css/src/avatar.css b/assets/css/src/avatar.css
new file mode 100644
index 00000000..a30689e8
--- /dev/null
+++ b/assets/css/src/avatar.css
@@ -0,0 +1,17 @@
+.avatar {
+    float: left;
+    margin-right: 10px;
+}
+
+.avatar img,
+.avatar div {
+    border-radius: 30px;
+}
+
+.avatar-letter {
+    color: #fff;
+    line-height: 48px;
+    width: 48px;
+    font-size: 25px;
+    text-align: center;
+}
diff --git a/assets/css/src/base.css b/assets/css/src/base.css
index 7f5642e7..591af72b 100644
--- a/assets/css/src/base.css
+++ b/assets/css/src/base.css
@@ -47,11 +47,6 @@ hr {
     min-height: 27px; /* Reserve some space to avoid re-layout due to chosen */
 }
 
-.avatar {
-    float: left;
-    margin-right: 10px;
-}
-
 #ui-datepicker-div {
     font-size: 0.8em;
 }
diff --git a/tests/units/User/Avatar/LetterAvatarProviderTest.php b/tests/units/User/Avatar/LetterAvatarProviderTest.php
new file mode 100644
index 00000000..0c1bfc4b
--- /dev/null
+++ b/tests/units/User/Avatar/LetterAvatarProviderTest.php
@@ -0,0 +1,37 @@
+<?php
+
+require_once __DIR__.'/../../Base.php';
+
+use Kanboard\User\Avatar\LetterAvatarProvider;
+
+class LetterAvatarProviderTest extends Base
+{
+    public function testGetBackgroundColor()
+    {
+        $provider = new LetterAvatarProvider($this->container);
+        $rgb = $provider->getBackgroundColor('Test');
+        $this->assertEquals(array(107, 83, 172), $rgb);
+    }
+
+    public function testIsActive()
+    {
+        $provider = new LetterAvatarProvider($this->container);
+        $this->assertTrue($provider->isActive(array()));
+    }
+
+    public function testRenderWithFullName()
+    {
+        $provider = new LetterAvatarProvider($this->container);
+        $user = array('id' => 123, 'name' => 'Kanboard Admin', 'username' => 'bob', 'email' => '');
+        $expected = '<div class="avatar-letter" style="background-color: rgb(187, 224, 108)" title="Kanboard Admin">KA</div>';
+        $this->assertEquals($expected, $provider->render($user, 48));
+    }
+
+    public function testRenderWithUsername()
+    {
+        $provider = new LetterAvatarProvider($this->container);
+        $user = array('id' => 123, 'name' => '', 'username' => 'admin', 'email' => '');
+        $expected = '<div class="avatar-letter" style="background-color: rgb(210, 97, 45)" title="admin">A</div>';
+        $this->assertEquals($expected, $provider->render($user, 48));
+    }
+}