MyShaarli/application/Updater.php

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<?php
/**
* Class Updater.
* Used to update stuff when a new Shaarli's version is reached.
* Update methods are ran only once, and the stored in a JSON file.
*/
class Updater
{
/**
* @var array Updates which are already done.
*/
protected $doneUpdates;
/**
* @var LinkDB instance.
*/
protected $linkDB;
/**
* @var ConfigManager $conf Configuration Manager instance.
*/
protected $conf;
/**
* @var bool True if the user is logged in, false otherwise.
*/
protected $isLoggedIn;
/**
* @var ReflectionMethod[] List of current class methods.
*/
protected $methods;
/**
* Object constructor.
*
* @param array $doneUpdates Updates which are already done.
* @param LinkDB $linkDB LinkDB instance.
* @param ConfigManager $conf Configuration Manager instance.
* @param boolean $isLoggedIn True if the user is logged in.
*/
public function __construct($doneUpdates, $linkDB, $conf, $isLoggedIn)
{
$this->doneUpdates = $doneUpdates;
$this->linkDB = $linkDB;
$this->conf = $conf;
$this->isLoggedIn = $isLoggedIn;
// Retrieve all update methods.
$class = new ReflectionClass($this);
$this->methods = $class->getMethods();
}
/**
* Run all new updates.
* Update methods have to start with 'updateMethod' and return true (on success).
*
* @return array An array containing ran updates.
*
* @throws UpdaterException If something went wrong.
*/
public function update()
{
$updatesRan = array();
// If the user isn't logged in, exit without updating.
if ($this->isLoggedIn !== true) {
return $updatesRan;
}
if ($this->methods == null) {
throw new UpdaterException('Couldn\'t retrieve Updater class methods.');
}
foreach ($this->methods as $method) {
// Not an update method or already done, pass.
if (! startsWith($method->getName(), 'updateMethod')
|| in_array($method->getName(), $this->doneUpdates)
) {
continue;
}
try {
$method->setAccessible(true);
$res = $method->invoke($this);
// Update method must return true to be considered processed.
if ($res === true) {
$updatesRan[] = $method->getName();
}
} catch (Exception $e) {
throw new UpdaterException($method, $e);
}
}
$this->doneUpdates = array_merge($this->doneUpdates, $updatesRan);
return $updatesRan;
}
/**
* @return array Updates methods already processed.
*/
public function getDoneUpdates()
{
return $this->doneUpdates;
}
/**
* Move deprecated options.php to config.php.
*
* Milestone 0.9 (old versioning) - shaarli/Shaarli#41:
* options.php is not supported anymore.
*/
public function updateMethodMergeDeprecatedConfigFile()
{
if (is_file($this->conf->get('resource.data_dir') . '/options.php')) {
include $this->conf->get('resource.data_dir') . '/options.php';
// Load GLOBALS into config
$allowedKeys = array_merge(ConfigPhp::$ROOT_KEYS);
$allowedKeys[] = 'config';
foreach ($GLOBALS as $key => $value) {
if (in_array($key, $allowedKeys)) {
$this->conf->set($key, $value);
}
}
$this->conf->write($this->isLoggedIn);
unlink($this->conf->get('resource.data_dir').'/options.php');
}
return true;
}
/**
* Rename tags starting with a '-' to work with tag exclusion search.
*/
public function updateMethodRenameDashTags()
{
$linklist = $this->linkDB->filterSearch();
foreach ($linklist as $link) {
$link['tags'] = preg_replace('/(^| )\-/', '$1', $link['tags']);
$link['tags'] = implode(' ', array_unique(LinkFilter::tagsStrToArray($link['tags'], true)));
$this->linkDB[$link['linkdate']] = $link;
}
$this->linkDB->save($this->conf->get('resource.page_cache'));
return true;
}
/**
* Move old configuration in PHP to the new config system in JSON format.
*
* Will rename 'config.php' into 'config.save.php' and create 'config.json.php'.
* It will also convert legacy setting keys to the new ones.
*/
public function updateMethodConfigToJson()
{
// JSON config already exists, nothing to do.
if ($this->conf->getConfigIO() instanceof ConfigJson) {
return true;
}
$configPhp = new ConfigPhp();
$configJson = new ConfigJson();
$oldConfig = $configPhp->read($this->conf->getConfigFile() . '.php');
rename($this->conf->getConfigFileExt(), $this->conf->getConfigFile() . '.save.php');
$this->conf->setConfigIO($configJson);
$this->conf->reload();
$legacyMap = array_flip(ConfigPhp::$LEGACY_KEYS_MAPPING);
foreach (ConfigPhp::$ROOT_KEYS as $key) {
$this->conf->set($legacyMap[$key], $oldConfig[$key]);
}
// Set sub config keys (config and plugins)
$subConfig = array('config', 'plugins');
foreach ($subConfig as $sub) {
foreach ($oldConfig[$sub] as $key => $value) {
if (isset($legacyMap[$sub .'.'. $key])) {
$configKey = $legacyMap[$sub .'.'. $key];
} else {
$configKey = $sub .'.'. $key;
}
$this->conf->set($configKey, $value);
}
}
try{
$this->conf->write($this->isLoggedIn);
return true;
} catch (IOException $e) {
error_log($e->getMessage());
return false;
}
}
/**
* Escape settings which have been manually escaped in every request in previous versions:
* - general.title
* - general.header_link
* - redirector.url
*
* @return bool true if the update is successful, false otherwise.
*/
public function updateMethodEscapeUnescapedConfig()
{
try {
$this->conf->set('general.title', escape($this->conf->get('general.title')));
$this->conf->set('general.header_link', escape($this->conf->get('general.header_link')));
$this->conf->set('redirector.url', escape($this->conf->get('redirector.url')));
$this->conf->write($this->isLoggedIn);
} catch (Exception $e) {
error_log($e->getMessage());
return false;
}
return true;
}
}
/**
* Class UpdaterException.
*/
class UpdaterException extends Exception
{
/**
* @var string Method where the error occurred.
*/
protected $method;
/**
* @var Exception The parent exception.
*/
protected $previous;
/**
* Constructor.
*
* @param string $message Force the error message if set.
* @param string $method Method where the error occurred.
* @param Exception|bool $previous Parent exception.
*/
public function __construct($message = '', $method = '', $previous = false)
{
$this->method = $method;
$this->previous = $previous;
$this->message = $this->buildMessage($message);
}
/**
* Build the exception error message.
*
* @param string $message Optional given error message.
*
* @return string The built error message.
*/
private function buildMessage($message)
{
$out = '';
if (! empty($message)) {
$out .= $message . PHP_EOL;
}
if (! empty($this->method)) {
$out .= 'An error occurred while running the update '. $this->method . PHP_EOL;
}
if (! empty($this->previous)) {
$out .= ' '. $this->previous->getMessage();
}
return $out;
}
}
/**
* Read the updates file, and return already done updates.
*
* @param string $updatesFilepath Updates file path.
*
* @return array Already done update methods.
*/
function read_updates_file($updatesFilepath)
{
if (! empty($updatesFilepath) && is_file($updatesFilepath)) {
$content = file_get_contents($updatesFilepath);
if (! empty($content)) {
return explode(';', $content);
}
}
return array();
}
/**
* Write updates file.
*
* @param string $updatesFilepath Updates file path.
* @param array $updates Updates array to write.
*
* @throws Exception Couldn't write version number.
*/
function write_updates_file($updatesFilepath, $updates)
{
if (empty($updatesFilepath)) {
throw new Exception('Updates file path is not set, can\'t write updates.');
}
$res = file_put_contents($updatesFilepath, implode(';', $updates));
if ($res === false) {
throw new Exception('Unable to write updates in '. $updatesFilepath . '.');
}
}