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<?php
/**
* Copyright (c) 2013 Christopher Schäpers <christopher@schaepers.it>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
/**
* This class gets and sets users avatars.
* Avalaible backends are local (saved in users root at avatar.[png|jpg]) and gravatar.
* However the get function is easy to extend with further backends.
*/
class OC_Avatar {
/**
* @brief gets a link to the users avatar
* @param $user string username
* @param $size integer size in px of the avatar, defaults to 64
* @return mixed link to the avatar, false if avatars are disabled
*/
public static function get ($user, $size = 64) {
$mode = OC_Config::getValue("avatar", "local");
if ($mode === "none") {
// avatars are disabled
return false;
} elseif ($mode === "gravatar") {
return \OC_Avatar::getGravatar($user, $size);
} elseif ($mode === "local") {
return \OC_Avatar::getLocalAvatar($user, $size);
}
}
/**
* @brief returns the active avatar mode
* @return string active avatar mode
*/
public static function getMode () {
return OC_Config::getValue("avatar", "local");
}
/**
* @brief sets the users local avatar
* @param $user string user to set the avatar for
* @param $data mixed imagedata or path to set a new avatar, or false to delete the current avatar
* @throws Exception if the provided file is not a jpg or png image
* @throws Exception if the provided image is not valid, or not a square
* @return true on success
*/
public static function setLocalAvatar ($user, $data) {
$view = new \OC\Files\View('/'.$user);
if ($data === false) {
$view->unlink('avatar.jpg');
$view->unlink('avatar.png');
return true;
} else {
$img = new OC_Image($data);
// FIXME this always says "image/png", when loading from data
$type = substr($img->mimeType(), -3);
if ($type === 'peg') { $type = 'jpg'; }
if ($type !== 'jpg' && $type !== 'png') {
throw new Exception();
}
if (!( $img->valid() && ($img->height() === $img->width()) )) {
throw new Exception();
}
$view->unlink('avatar.jpg');
$view->unlink('avatar.png');
$view->file_put_contents('avatar.'.$type, $data);
return true;
}
}
/**
* @brief get the users gravatar
* @param $user string which user to get the gravatar for
* @param size integer size in px of the avatar, defaults to 64
* @return string link to the gravatar, or base64encoded, html-ready image
*/
public static function getGravatar ($user, $size = 64) {
$email = OC_Preferences::getValue($user, 'settings', 'email');
if ($email !== null) {
$emailhash = md5(strtolower(trim($email)));
$url = "http://www.gravatar.com/avatar/".$emailhash."?s=".$size;
return $url;
} else {
return \OC_Avatar::wrapIntoImg(\OC_Avatar::getDefaultAvatar($size), 'png');
}
}
/**
* @brief get the local avatar
* @param $user string which user to get the avatar for
* @param $size integer size in px of the avatar, defaults to 64
* @return string base64encoded encoded, html-ready image
*/
public static function getLocalAvatar ($user, $size = 64) {
$view = new \OC\Files\View('/'.$user);
if ($view->file_exists('avatar.jpg')) {
$type = 'jpg';
} elseif ($view->file_exists('avatar.png')) {
$type = 'png';
} else {
return \OC_Avatar::wrapIntoImg(\OC_Avatar::getDefaultAvatar($size), 'png');
}
$avatar = new OC_Image($view->file_get_contents('avatar.'.$type));
$avatar->resize($size);
return \OC_Avatar::wrapIntoImg((string)$avatar, $type);
}
/**
* @brief gets the default avatar
* @param $size integer size of the avatar in px, defaults to 64
* @return string base64 encoded default avatar
*/
public static function getDefaultAvatar ($size = 64) {
$default = new OC_Image(OC::$SERVERROOT."/core/img/defaultavatar.png");
$default->resize($size);
return (string)$default;
}
/**
* @brief wrap a base64encoded image, so it can be used in html
* @param $img string base64encoded image
* @param $type string imagetype
* @return string wrapped image
*/
public static function wrapIntoImg($img, $type) {
return 'data:image/'.$type.';base64,'.$img;
}
}
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