2017-08-17 17:18:41 +02:00

217 lines
6.1 KiB
PHP

<?php
/* μlogger
*
* Copyright(C) 2017 Bartek Fabiszewski (www.fabiszewski.net)
*
* This is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
require_once(ROOT_DIR . "/helpers/db.php");
require_once(ROOT_DIR . "/helpers/position.php");
/**
* Track handling
*/
class uTrack {
public $id;
public $userId;
public $name;
public $comment;
public $isValid = false;
private static $db = null;
/**
* Constructor
*
* @param int $trackId Track id
*/
public function __construct($trackId = NULL) {
if (!empty($trackId)) {
$query = "SELECT id, user_id, name, comment FROM `" . self::db()->table('tracks') . "` WHERE id = ? LIMIT 1";
$stmt = self::db()->prepare($query);
$stmt->bind_param('i', $trackId);
$stmt->execute();
$stmt->bind_result($this->id, $this->userId, $this->name, $this->comment);
if ($stmt->fetch()) {
$this->isValid = true;
}
$stmt->close();
}
}
/**
* Get db instance
*
* @return uDb instance
*/
private static function db() {
if (is_null(self::$db)) {
self::$db = uDb::getInstance();
}
return self::$db;
}
/**
* Add new track
*
* @param string $userId User id
* @param string $name Name
* @param string $comment Optional comment
* @return int|bool New track id, false on error
*/
public static function add($userId, $name, $comment = NULL) {
$trackId = false;
if (!empty($userId) && !empty($name)) {
$query = "INSERT INTO `" . self::db()->table('tracks') . "` (user_id, name, comment) VALUES (?, ?, ?)";
$stmt = self::db()->prepare($query);
$stmt->bind_param('iss', $userId, $name, $comment);
$stmt->execute();
if (!self::db()->error && !$stmt->errno) {
$trackId = self::db()->insert_id;
}
$stmt->close();
}
return $trackId;
}
/**
* Delete track with all positions
*
* @return bool True if success, false otherwise
*/
public function delete() {
$ret = false;
if ($this->isValid) {
// delete positions
if (uPosition::deleteAll($this->userId, $this->id) === false) {
return false;
}
// delete track metadata
$query = "DELETE FROM `" . self::db()->table('tracks') . "` WHERE id = ?";
$stmt = self::db()->prepare($query);
$stmt->bind_param('i', $this->id);
$stmt->execute();
if (!self::db()->error && !$stmt->errno) {
$ret = true;
$this->id = NULL;
$this->userId = NULL;
$this->name = NULL;
$this->comment = NULL;
$this->isValid = false;
}
$stmt->close();
}
return $ret;
}
/**
* Update track
*
* @param string|null $name New name (not empty string) or NULL if not changed
* @param string|null $comment New comment or NULL if not changed (to remove content use empty string: "")
* @return bool True if success, false otherwise
*/
public function update($name = NULL, $comment = NULL) {
$ret = false;
if (empty($name)) { $name = $this->name; }
if (is_null($comment)) { $comment = $this->comment; }
if ($comment == "") { $comment = NULL; }
if ($this->isValid) {
$query = "UPDATE `" . self::db()->table('tracks') . "` SET name = ?, comment = ? WHERE id = ?";
$stmt = self::db()->prepare($query);
$stmt->bind_param('ssi', $name, $comment, $this->id);
$stmt->execute();
if (!self::db()->error && !$stmt->errno) {
$ret = true;
$this->name = $name;
$this->comment = $comment;
}
$stmt->close();
}
return $ret;
}
/**
* Delete all user's tracks
*
* @param string $userId User id
* @return bool True if success, false otherwise
*/
public static function deleteAll($userId) {
$ret = false;
if (!empty($userId)) {
// remove all positions
if (uPosition::deleteAll($userId) === true) {
// remove all tracks
$query = "DELETE FROM `" . self::db()->table('tracks') . "` WHERE user_id = ?";
$stmt = self::db()->prepare($query);
$stmt->bind_param('i', $userId);
$stmt->execute();
if (!self::db()->error && !$stmt->errno) {
$ret = true;
}
$stmt->close();
}
}
return $ret;
}
/**
* Get all tracks
*
* @param int $userId Optional limit to user id
* @return array|bool Array of uTrack tracks, false on error
*/
public static function getAll($userId = NULL) {
if (!empty($userId)) {
$where = "WHERE user_id='" . self::db()->real_escape_string($userId) ."'";
} else {
$where = "";
}
$query = "SELECT id, user_id, name, comment FROM `" . self::db()->table('tracks') . "` $where ORDER BY id DESC";
$result = self::db()->query($query);
if ($result === false) {
return false;
}
$trackArr = [];
while ($row = $result->fetch_assoc()) {
$trackArr[] = self::rowToObject($row);
}
$result->close();
return $trackArr;
}
/**
* Convert database row to uTrack
*
* @param array $row Row
* @return uTrack Track
*/
private static function rowToObject($row) {
$track = new uTrack();
$track->id = $row['id'];
$track->userId = $row['user_id'];
$track->name = $row['name'];
$track->comment = $row['comment'];
$track->isValid = true;
return $track;
}
}
?>