marc-leopold/cms/plugins/rainlab/builder/classes/MigrationModel.php

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2019-02-25 14:56:59 +00:00
<?php namespace RainLab\Builder\Classes;
use Str;
use Lang;
use File;
use Yaml;
use Validator;
use System\Classes\VersionManager;
use October\Rain\Parse\Bracket as TextParser;
use ApplicationException;
use ValidationException;
use SystemException;
use Exception;
/**
* Manages plugin migrations
*
* @package rainlab\builder
* @author Alexey Bobkov, Samuel Georges
*/
class MigrationModel extends BaseModel
{
/**
* @var string Migration version string
*/
public $version;
/**
* @var string The migration description
*/
public $description;
/**
* @var string The migration PHP code string
*/
public $code;
protected $originalVersion;
/**
* @var string The migration script file name.
* Currently only migrations with a single (or none) script file are supported
* by Builder editors.
*/
public $scriptFileName;
public $originalScriptFileName;
protected static $fillable = [
'version',
'description',
'code'
];
protected $validationRules = [
'version' => ['required', 'regex:/^[0-9]+\.[0-9]+\.[0-9]+$/', 'uniqueVersion'],
'description' => ['required'],
'scriptFileName' => ['regex:/^[a-z]+[a-z0-9_]+$/']
];
public function validate()
{
$isNewModel = $this->isNewModel();
$this->validationMessages = [
'version.regex' => Lang::get('rainlab.builder::lang.migration.error_version_invalid'),
'version.unique_version' => Lang::get('rainlab.builder::lang.migration.error_version_exists'),
'scriptFileName.regex' => Lang::get('rainlab.builder::lang.migration.error_script_filename_invalid')
];
$versionInformation = $this->getPluginVersionInformation();
Validator::extend('uniqueVersion', function($attribute, $value, $parameters) use ($versionInformation, $isNewModel) {
if ($isNewModel || $this->version != $this->originalVersion) {
return !array_key_exists($value, $versionInformation);
}
return true;
});
if (!$isNewModel && $this->version != $this->originalVersion && $this->isApplied()) {
throw new ValidationException([
'version' => Lang::get('rainlab.builder::lang.migration.error_cannot_change_version_number')
]);
}
return parent::validate();
}
public function getNextVersion()
{
$versionInformation = $this->getPluginVersionInformation();
if (!count($versionInformation)) {
return '1.0.0';
}
$versions = array_keys($versionInformation);
$latestVersion = end($versions);
$versionNumbers = [];
if (!preg_match('/^([0-9]+)\.([0-9]+)\.([0-9]+)$/', $latestVersion, $versionNumbers)) {
throw new SystemException(sprintf('Cannot parse the latest plugin version number: %s.', $latestVersion));
}
return $versionNumbers[1].'.'.$versionNumbers[2].'.'.($versionNumbers[3]+1);
}
/**
* Saves the migration and applies all outstanding migrations for the plugin.
*/
public function save($executeOnSave = true)
{
$this->validate();
if (!strlen($this->scriptFileName) || !$this->isNewModel()) {
$this->assignFileName();
}
$originalFileContents = $this->saveScriptFile();
try {
$originalVersionData = $this->insertOrUpdateVersion();
} catch (Exception $ex) {
// Remove the script file, but don't rollback
// the version.yaml.
$this->rollbackSaving(null, $originalFileContents);
throw $ex;
}
try {
if ($executeOnSave) {
VersionManager::instance()->updatePlugin($this->getPluginCodeObj()->toCode(), $this->version);
}
}
catch (Exception $ex) {
// Remove the script file, and rollback
// the version.yaml.
$this->rollbackSaving($originalVersionData, $originalFileContents);
throw $ex;
}
$this->originalVersion = $this->version;
$this->exists = true;
}
public function load($versionNumber)
{
$versionNumber = trim($versionNumber);
if (!strlen($versionNumber)) {
throw new ApplicationException('Cannot load the the version model - the version number should not be empty.');
}
$pluginVersions = $this->getPluginVersionInformation();
if (!array_key_exists($versionNumber, $pluginVersions)) {
throw new ApplicationException('The requested version does not exist in the version information file.');
}
$this->version = $versionNumber;
$this->originalVersion = $this->version;
$this->exists = true;
$versionInformation = $pluginVersions[$versionNumber];
if (!is_array($versionInformation)) {
$this->description = $versionInformation;
}
else {
$cnt = count($versionInformation);
if ($cnt > 2) {
throw new ApplicationException('The requested version cannot be edited with Builder as it refers to multiple PHP scripts.');
}
if ($cnt > 0) {
$this->description = $versionInformation[0];
}
if ($cnt > 1) {
$this->scriptFileName = pathinfo(trim($versionInformation[1]), PATHINFO_FILENAME);
$this->code = $this->loadScriptFile();
}
}
$this->originalScriptFileName = $this->scriptFileName;
}
public function initVersion($versionType)
{
$versionTypes = ['migration', 'seeder', 'custom'];
if (!in_array($versionType, $versionTypes)) {
throw new SystemException('Unknown version type.');
}
$this->version = $this->getNextVersion();
if ($versionType == 'custom') {
$this->scriptFileName = null;
return;
}
$templateFiles = [
'migration' => 'migration.php.tpl',
'seeder' => 'seeder.php.tpl'
];
$templatePath = '$/rainlab/builder/classes/migrationmodel/templates/'.$templateFiles[$versionType];
$templatePath = File::symbolizePath($templatePath);
$fileContents = File::get($templatePath);
$scriptFileName = $versionType.str_replace('.', '-', $this->version);
$pluginCodeObj = $this->getPluginCodeObj();
$this->code = TextParser::parse($fileContents, [
'className' => Str::studly($scriptFileName),
'namespace' => $pluginCodeObj->toUpdatesNamespace(),
'tableNamePrefix' => $pluginCodeObj->toDatabasePrefix()
]);
$this->scriptFileName = $scriptFileName;
}
public function makeScriptFileNameUnique()
{
$updatesPath = $this->getPluginUpdatesPath();
$baseFileName = $fileName = $this->scriptFileName;
$counter = 2;
while (File::isFile($updatesPath.'/'.$fileName.'.php')) {
$fileName = $baseFileName.'_'.$counter;
$counter++;
}
return $this->scriptFileName = $fileName;
}
public function deleteModel()
{
if ($this->isApplied()) {
throw new ApplicationException(Lang::get('rainlab.builder::lang.migration.error_cant_delete_applied'));
}
$this->deleteVersion();
$this->removeScriptFile();
}
public function isApplied()
{
if ($this->isNewModel()) {
return false;
}
$versionManager = VersionManager::instance();
$unappliedVersions = $versionManager->listNewVersions($this->pluginCodeObj->toCode());
return !array_key_exists($this->originalVersion, $unappliedVersions);
}
public function apply()
{
if ($this->isApplied()) {
return;
}
$versionManager = VersionManager::instance();
$versionManager->updatePlugin($this->pluginCodeObj->toCode(), $this->version);
}
public function rollback()
{
if (!$this->isApplied()) {
return;
}
$versionManager = VersionManager::instance();
$versionManager->removePlugin($this->pluginCodeObj->toCode(), $this->version);
}
protected function assignFileName()
{
$code = trim($this->code);
if (!strlen($code)) {
$this->scriptFileName = null;
return;
}
/*
* The file name is based on the migration class name.
*/
$parser = new MigrationFileParser();
$migrationInfo = $parser->extractMigrationInfoFromSource($code);
if (!$migrationInfo || !array_key_exists('class', $migrationInfo)) {
throw new ValidationException([
'code' => Lang::get('rainlab.builder::lang.migration.error_file_must_define_class')
]);
}
if (!array_key_exists('namespace', $migrationInfo)) {
throw new ValidationException([
'code' => Lang::get('rainlab.builder::lang.migration.error_file_must_define_namespace')
]);
}
$pluginCodeObj = $this->getPluginCodeObj();
$pluginNamespace = $pluginCodeObj->toUpdatesNamespace();
if ($migrationInfo['namespace'] != $pluginNamespace) {
throw new ValidationException([
'code' => Lang::get('rainlab.builder::lang.migration.error_namespace_mismatch', ['namespace'=>$pluginNamespace])
]);
}
$this->scriptFileName = Str::snake($migrationInfo['class']);
/*
* Validate that a file with the generated name does not exist yet.
*/
if ($this->scriptFileName != $this->originalScriptFileName) {
$fileName = $this->scriptFileName.'.php';
$filePath = $this->getPluginUpdatesPath($fileName);
if (File::isFile($filePath)) {
throw new ValidationException([
'code' => Lang::get('rainlab.builder::lang.migration.error_migration_file_exists', ['file'=>$fileName])
]);
}
}
}
protected function saveScriptFile()
{
$originalFileContents = $this->getOriginalFileContents();
if (strlen($this->scriptFileName)) {
$scriptFilePath = $this->getPluginUpdatesPath($this->scriptFileName.'.php');
if (!File::put($scriptFilePath, $this->code)) {
throw new SystemException(sprintf('Error saving file %s', $scriptFilePath));
}
@File::chmod($scriptFilePath);
}
if (strlen($this->originalScriptFileName) && $this->scriptFileName != $this->originalScriptFileName) {
$originalScriptFilePath = $this->getPluginUpdatesPath($this->originalScriptFileName.'.php');
if (File::isFile($originalScriptFilePath)) {
@unlink($originalScriptFilePath);
}
}
return $originalFileContents;
}
protected function getOriginalFileContents()
{
if (!strlen($this->originalScriptFileName)) {
return null;
}
$scriptFilePath = $this->getPluginUpdatesPath($this->originalScriptFileName.'.php');
if (File::isFile($scriptFilePath)) {
return File::get($scriptFilePath);
}
}
protected function loadScriptFile()
{
$scriptFilePath = $this->getPluginUpdatesPath($this->scriptFileName.'.php');
if (!File::isFile($scriptFilePath)) {
throw new ApplicationException(sprintf('Version file %s is not found.', $scriptFilePath));
}
return File::get($scriptFilePath);
}
protected function removeScriptFile()
{
$scriptFilePath = $this->getPluginUpdatesPath($this->scriptFileName.'.php');
// Using unlink instead of File::remove() is safer here.
@unlink($scriptFilePath);
}
protected function rollbackScriptFile($fileContents)
{
$scriptFilePath = $this->getPluginUpdatesPath($this->originalScriptFileName.'.php');
@File::put($scriptFilePath, $fileContents);
if ($this->scriptFileName != $this->originalScriptFileName) {
$scriptFilePath = $this->getPluginUpdatesPath($this->scriptFileName.'.php');
@unlink($scriptFilePath);
}
}
protected function rollbackSaving($originalVersionData, $originalScriptFileContents)
{
if ($originalVersionData) {
$this->rollbackVersionFile($originalVersionData);
}
if ($this->isNewModel()) {
$this->removeScriptFile();
}
else {
$this->rollbackScriptFile($originalScriptFileContents);
}
}
protected function insertOrUpdateVersion()
{
$versionFilePath = $this->getPluginUpdatesPath('version.yaml');
$versionInformation = $this->getPluginVersionInformation();
if (!$versionInformation) {
$versionInformation = [];
}
$originalFileContents = File::get($versionFilePath);
if (!$originalFileContents) {
throw new SystemException(sprintf('Error loading file %s', $versionFilePath));
}
$versionInformation[$this->version] = [
$this->description
];
if (strlen($this->scriptFileName)) {
$versionInformation[$this->version][] = $this->scriptFileName.'.php';
}
if (!$this->isNewModel() && $this->version != $this->originalVersion) {
if (array_key_exists($this->originalVersion, $versionInformation)) {
unset($versionInformation[$this->originalVersion]);
}
}
$yamlData = Yaml::render($versionInformation);
if (!File::put($versionFilePath, $yamlData)) {
throw new SystemException(sprintf('Error saving file %s', $versionFilePath));
}
@File::chmod($versionFilePath);
return $originalFileContents;
}
protected function deleteVersion()
{
$versionInformation = $this->getPluginVersionInformation();
if (!$versionInformation) {
$versionInformation = [];
}
if (array_key_exists($this->version, $versionInformation)) {
unset($versionInformation[$this->version]);
}
$versionFilePath = $this->getPluginUpdatesPath('version.yaml');
$yamlData = Yaml::render($versionInformation);
if (!File::put($versionFilePath, $yamlData)) {
throw new SystemException(sprintf('Error saving file %s', $versionFilePath));
}
@File::chmod($versionFilePath);
}
protected function rollbackVersionFile($fileData)
{
$versionFilePath = $this->getPluginUpdatesPath('version.yaml');
File::put($versionFilePath, $fileData);
}
protected function getPluginUpdatesPath($fileName = null)
{
$pluginCodeObj = $this->getPluginCodeObj();
$filePath = '$/'.$pluginCodeObj->toFilesystemPath().'/updates';
$filePath = File::symbolizePath($filePath);
if ($fileName !== null) {
return $filePath .= '/'.$fileName;
}
return $filePath;
}
protected function getPluginVersionInformation()
{
$versionObj = new PluginVersion;
return $versionObj->getPluginVersionInformation($this->getPluginCodeObj());
}
}