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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.
* Available backends are local (saved in users root at avatar.[png|jpg]), gravatar TODO and custom backends.
* However the get function is easy to extend with further backends.
*/
class OC_Avatar {
/**
* @brief gets the users avatar
* @param $user string username, if not provided, the default avatar will be returned
* @param $size integer size in px of the avatar, defaults to 64
* @return mixed \OC_Image containing the avatar, a link to the avatar, false if avatars are disabled
*/
public static function get ($user = false, $size = 64) {
$mode = self::getMode();
if ($mode === "none") {
// avatars are disabled
return false;
} else {
if ($user === false) {
return self::getDefaultAvatar($size);
} elseif ($mode === "gravatar") {
return self::getGravatar($user, $size);
} elseif ($mode === "local") {
return self::getLocalAvatar($user, $size);
} elseif ($mode === "custom") {
return self::getCustomAvatar($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);
$type = substr($img->mimeType(), -3);
if ($type === 'peg') { $type = 'jpg'; }
if ($type !== 'jpg' && $type !== 'png') {
$l = \OC_L10N::get('lib');
throw new \Exception($l->t("Unknown filetype for avatar"));
}
if (!( $img->valid() && ($img->height() === $img->width()) )) {
$l = \OC_L10N::get('lib');
throw new \Exception($l->t("Invalid image, or the provided image is not square"));
}
$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 $size integer size in px of the avatar, defaults to 64
* @return string link to the gravatar, or \OC_Image with the default avatar
*/
public static function getGravatar ($user, $size = 64) {
$email = \OC_Preferences::getValue($user, 'settings', 'email');
if ($email !== null) {
$emailhash = md5(strtolower(trim($email)));
$url = "http://secure.gravatar.com/avatar/".$emailhash."?d=404&s=".$size;
$headers = get_headers($url, 1);
if (strpos($headers[0], "404 Not Found") === false) {
return $url;
}
}
return self::getDefaultAvatar($user, $size);
}
/**
* @brief get the local avatar
* @param $user string which user to get the avatar for
* @param $size integer size in px of the avatar, defaults to 64
* @return string \OC_Image containing the avatar
*/
public static function getLocalAvatar ($user, $size = 64) {
$view = new \OC\Files\View('/'.$user);
if ($view->file_exists('avatar.jpg')) {
$ext = 'jpg';
} elseif ($view->file_exists('avatar.png')) {
$ext = 'png';
} else {
return self::getDefaultAvatar($user, $size);
}
$avatar = new OC_Image($view->file_get_contents('avatar.'.$ext));
$avatar->resize($size);
return $avatar;
}
/**
* @todo todo
*/
public static function getCustomAvatar($user, $size) {
// TODO
}
/**
* @brief gets the default avatar
* @brief $user string which user to get the avatar for
* @param $size integer size of the avatar in px, defaults to 64
* @return \OC_Image containing the default avatar
* @todo use custom default images, when they arive
*/
public static function getDefaultAvatar ($user, $size = 64) {
$default = new OC_Image(OC::$SERVERROOT."/core/img/defaultavatar.png");
$default->resize($size);
return $default;
}
}
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