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code/web/backend/application/model/AvatarModel.php
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254
code/web/backend/application/model/AvatarModel.php
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<?php
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class AvatarModel
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{
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/**
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* Gets a gravatar image link from given email address
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*
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* Gravatar is the #1 (free) provider for email address based global avatar hosting.
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* The URL (or image) returns always a .jpg file ! For deeper info on the different parameter possibilities:
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* @see http://gravatar.com/site/implement/images/
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* @source http://gravatar.com/site/implement/images/php/
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*
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* This method will return something like http://www.gravatar.com/avatar/79e2e5b48aec07710c08d50?s=80&d=mm&r=g
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* Note: the url does NOT have something like ".jpg" ! It works without.
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*
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* Set the configs inside the application/config/ files.
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*
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* @param string $email The email address
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* @return string
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*/
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public static function getGravatarLinkByEmail($email)
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{
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return 'http://www.gravatar.com/avatar/' .
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md5( strtolower( trim( $email ) ) ) .
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'?s=' . Config::get('AVATAR_SIZE') . '&d=' . Config::get('GRAVATAR_DEFAULT_IMAGESET') . '&r=' . Config::get('GRAVATAR_RATING');
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}
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/**
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* Gets the user's avatar file path
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* @param int $user_has_avatar Marker from database
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* @param int $user_id User's id
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* @return string Avatar file path
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*/
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public static function getPublicAvatarFilePathOfUser($user_has_avatar, $user_id)
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{
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if ($user_has_avatar) {
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return Config::get('URL') . Config::get('PATH_AVATARS_PUBLIC') . $user_id . '.jpg';
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}
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return Config::get('URL') . Config::get('PATH_AVATARS_PUBLIC') . Config::get('AVATAR_DEFAULT_IMAGE');
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}
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/**
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* Gets the user's avatar file path
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* @param $user_id integer The user's id
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* @return string avatar picture path
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*/
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public static function getPublicUserAvatarFilePathByUserId($user_id)
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{
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$database = DatabaseFactory::getFactory()->getConnection();
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$query = $database->prepare("SELECT user_has_avatar FROM users WHERE user_id = :user_id LIMIT 1");
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$query->execute(array(':user_id' => $user_id));
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if ($query->fetch()->user_has_avatar) {
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return Config::get('URL') . Config::get('PATH_AVATARS_PUBLIC') . $user_id . '.jpg';
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}
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return Config::get('URL') . Config::get('PATH_AVATARS_PUBLIC') . Config::get('AVATAR_DEFAULT_IMAGE');
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}
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/**
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* Create an avatar picture (and checks all necessary things too)
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* TODO decouple
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* TODO total rebuild
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*/
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public static function createAvatar()
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{
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// check avatar folder writing rights, check if upload fits all rules
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if (AvatarModel::isAvatarFolderWritable() AND AvatarModel::validateImageFile()) {
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// create a jpg file in the avatar folder, write marker to database
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$target_file_path = Config::get('PATH_AVATARS') . Session::get('user_id');
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AvatarModel::resizeAvatarImage($_FILES['avatar_file']['tmp_name'], $target_file_path, Config::get('AVATAR_SIZE'), Config::get('AVATAR_SIZE'), Config::get('AVATAR_JPEG_QUALITY'));
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AvatarModel::writeAvatarToDatabase(Session::get('user_id'));
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Session::set('user_avatar_file', AvatarModel::getPublicUserAvatarFilePathByUserId(Session::get('user_id')));
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Session::add('feedback_positive', Text::get('FEEDBACK_AVATAR_UPLOAD_SUCCESSFUL'));
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}
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}
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/**
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* Checks if the avatar folder exists and is writable
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*
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* @return bool success status
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*/
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public static function isAvatarFolderWritable()
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{
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if (is_dir(Config::get('PATH_AVATARS')) AND is_writable(Config::get('PATH_AVATARS'))) {
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return true;
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}
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Session::add('feedback_negative', Text::get('FEEDBACK_AVATAR_FOLDER_DOES_NOT_EXIST_OR_NOT_WRITABLE'));
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return false;
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}
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/**
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* Validates the image
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* TODO totally decouple
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*
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* @return bool
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*/
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public static function validateImageFile()
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{
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if (!isset($_FILES['avatar_file'])) {
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Session::add('feedback_negative', Text::get('FEEDBACK_AVATAR_IMAGE_UPLOAD_FAILED'));
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return false;
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}
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if ($_FILES['avatar_file']['size'] > 5000000) {
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// if input file too big (>5MB)
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Session::add('feedback_negative', Text::get('FEEDBACK_AVATAR_UPLOAD_TOO_BIG'));
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return false;
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}
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// get the image width, height and mime type
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$image_proportions = getimagesize($_FILES['avatar_file']['tmp_name']);
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// if input file too small
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if ($image_proportions[0] < Config::get('AVATAR_SIZE') OR $image_proportions[1] < Config::get('AVATAR_SIZE')) {
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Session::add('feedback_negative', Text::get('FEEDBACK_AVATAR_UPLOAD_TOO_SMALL'));
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return false;
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}
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if (!($image_proportions['mime'] == 'image/jpeg')) {
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Session::add('feedback_negative', Text::get('FEEDBACK_AVATAR_UPLOAD_WRONG_TYPE'));
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return false;
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}
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return true;
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}
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/**
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* Writes marker to database, saying user has an avatar now
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*
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* @param $user_id
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*/
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public static function writeAvatarToDatabase($user_id)
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{
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$database = DatabaseFactory::getFactory()->getConnection();
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$query = $database->prepare("UPDATE users SET user_has_avatar = TRUE WHERE user_id = :user_id LIMIT 1");
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$query->execute(array(':user_id' => $user_id));
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}
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/**
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* Resize avatar image (while keeping aspect ratio and cropping it off sexy)
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*
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* TROUBLESHOOTING: You don't see the new image ? Press F5 or CTRL-F5 to refresh browser cache.
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*
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* @param string $source_image The location to the original raw image.
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* @param string $destination The location to save the new image.
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* @param int $final_width The desired width of the new image
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* @param int $final_height The desired height of the new image.
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* @param int $quality The quality of the JPG to produce 1 - 100
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*
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* TODO currently we just allow .jpg
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*
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* @return bool success state
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*/
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public static function resizeAvatarImage($source_image, $destination, $final_width = 44, $final_height = 44, $quality = 85)
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{
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list($width, $height) = getimagesize($source_image);
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if (!$width || !$height) {
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return false;
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}
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//saving the image into memory (for manipulation with GD Library)
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$myImage = imagecreatefromjpeg($source_image);
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// calculating the part of the image to use for thumbnail
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if ($width > $height) {
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$y = 0;
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$x = ($width - $height) / 2;
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$smallestSide = $height;
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} else {
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$x = 0;
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$y = ($height - $width) / 2;
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$smallestSide = $width;
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}
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// copying the part into thumbnail, maybe edit this for square avatars
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$thumb = imagecreatetruecolor($final_width, $final_height);
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imagecopyresampled($thumb, $myImage, 0, 0, $x, $y, $final_width, $final_height, $smallestSide, $smallestSide);
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// add '.jpg' to file path, save it as a .jpg file with our $destination_filename parameter
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$destination .= '.jpg';
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imagejpeg($thumb, $destination, $quality);
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// delete "working copy"
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imagedestroy($thumb);
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if (file_exists($destination)) {
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return true;
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}
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// default return
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return false;
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}
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/**
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* Delete a user's avatar
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*
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* @param int $userId
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* @return bool success
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*/
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public static function deleteAvatar($userId)
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{
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if (!ctype_digit($userId)) {
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Session::add("feedback_negative", Text::get("FEEDBACK_AVATAR_IMAGE_DELETE_FAILED"));
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return false;
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}
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// try to delete image, but still go on regardless of file deletion result
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self::deleteAvatarImageFile($userId);
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$database = DatabaseFactory::getFactory()->getConnection();
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$sth = $database->prepare("UPDATE users SET user_has_avatar = 0 WHERE user_id = :user_id LIMIT 1");
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$sth->bindValue(":user_id", (int)$userId, PDO::PARAM_INT);
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$sth->execute();
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if ($sth->rowCount() == 1) {
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Session::set('user_avatar_file', self::getPublicUserAvatarFilePathByUserId($userId));
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Session::add("feedback_positive", Text::get("FEEDBACK_AVATAR_IMAGE_DELETE_SUCCESSFUL"));
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return true;
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} else {
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Session::add("feedback_negative", Text::get("FEEDBACK_AVATAR_IMAGE_DELETE_FAILED"));
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return false;
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}
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}
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/**
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* Removes the avatar image file from the filesystem
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*
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* @param $userId
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* @return bool
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*/
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public static function deleteAvatarImageFile($userId)
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{
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// Check if file exists
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if (!file_exists(Config::get('PATH_AVATARS') . $userId . ".jpg")) {
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Session::add("feedback_negative", Text::get("FEEDBACK_AVATAR_IMAGE_DELETE_NO_FILE"));
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return false;
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}
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// Delete avatar file
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if (!unlink(Config::get('PATH_AVATARS') . $userId . ".jpg")) {
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Session::add("feedback_negative", Text::get("FEEDBACK_AVATAR_IMAGE_DELETE_FAILED"));
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return false;
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}
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return true;
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}
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}
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