mirror of
https://github.com/Combodo/iTop.git
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578 lines
17 KiB
PHP
578 lines
17 KiB
PHP
<?php
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/**
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* Copyright (c) 2010-2021 Combodo SARL
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*
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* This file is part of iTop.
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*
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* iTop is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* iTop is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with iTop. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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class MissingDependencyException extends CoreException
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{
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/**
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* @see \ModuleDiscovery::OrderModulesByDependencies property init
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* @var array<string, array<string>>
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* module id as key
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* another array as value, containing : 'module' with module info, 'dependencies' with missing dependencies
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*/
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public $aModulesInfo;
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/**
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* @return string HTML to print to the user the modules impacted
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* @since 2.7.7 3.0.2 3.1.0 N°5090 PR #280
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*/
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public function getHtmlDesc($sHighlightHtmlBegin = null, $sHighlightHtmlEnd = null)
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{
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$sErrorMessage = <<<HTML
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<p>The following modules have unmet dependencies:</p>
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<ul>
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HTML;
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foreach ($this->aModulesInfo as $sModuleId => $aModuleErrors) {
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$sModuleLabel = $aModuleErrors['module']['label'];
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$aModuleMissingDependencies = $aModuleErrors['dependencies'];
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$sErrorMessage .= <<<HTML
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<li><strong>{$sModuleLabel}</strong> ({$sModuleId}):
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<ul>
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HTML;
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foreach ($aModuleMissingDependencies as $sMissingModule) {
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$sErrorMessage .= "<li>{$sMissingModule}</li>";
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}
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$sErrorMessage .= <<<HTML
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</ul>
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</li>
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HTML;
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}
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$sErrorMessage .= '</ul>';
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return $sErrorMessage;
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}
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}
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class ModuleDiscovery
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{
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static $m_aModuleArgs = array(
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'label' => 'One line description shown during the interactive setup',
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'dependencies' => 'array of module ids',
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'mandatory' => 'boolean',
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'visible' => 'boolean',
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'datamodel' => 'array of data model files',
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//'dictionary' => 'array of dictionary files', // No longer mandatory, now automated
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'data.struct' => 'array of structural data files',
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'data.sample' => 'array of sample data files',
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'doc.manual_setup' => 'url',
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'doc.more_information' => 'url',
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);
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// Cache the results and the source directories
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protected static $m_aSearchDirs = null;
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protected static $m_aModules = array();
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protected static $m_aModuleVersionByName = array();
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// All the entries below are list of file paths relative to the module directory
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protected static $m_aFilesList = array('datamodel', 'webservice', 'dictionary', 'data.struct', 'data.sample');
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// ModulePath is used by AddModule to get the path of the module being included (in ListModuleFiles)
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protected static $m_sModulePath = null;
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protected static function SetModulePath($sModulePath)
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{
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self::$m_sModulePath = $sModulePath;
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}
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/**
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* @param string $sFilePath
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* @param string $sId
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* @param array $aArgs
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*
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* @throws \Exception for missing parameter
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*/
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public static function AddModule($sFilePath, $sId, $aArgs)
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{
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if (!array_key_exists('itop_version', $aArgs))
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{
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// Assume 1.0.2
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$aArgs['itop_version'] = '1.0.2';
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}
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foreach (array_keys(self::$m_aModuleArgs) as $sArgName)
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{
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if (!array_key_exists($sArgName, $aArgs))
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{
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throw new Exception("Module '$sId': missing argument '$sArgName'");
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}
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}
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$aArgs['root_dir'] = dirname($sFilePath);
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$aArgs['module_file'] = $sFilePath;
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list($sModuleName, $sModuleVersion) = static::GetModuleName($sId);
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if ($sModuleVersion == '')
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{
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$sModuleVersion = '1.0.0';
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}
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if (array_key_exists($sModuleName, self::$m_aModuleVersionByName))
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{
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if (version_compare($sModuleVersion, self::$m_aModuleVersionByName[$sModuleName]['version'], '>'))
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{
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// Newer version, let's upgrade
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$sIdToRemove = self::$m_aModuleVersionByName[$sModuleName]['id'];
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unset(self::$m_aModules[$sIdToRemove]);
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self::$m_aModuleVersionByName[$sModuleName]['version'] = $sModuleVersion;
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self::$m_aModuleVersionByName[$sModuleName]['id'] = $sId;
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}
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else
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{
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// Older (or equal) version, let's ignore it
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return;
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}
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}
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else
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{
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// First version to be loaded for this module, remember it
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self::$m_aModuleVersionByName[$sModuleName]['version'] = $sModuleVersion;
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self::$m_aModuleVersionByName[$sModuleName]['id'] = $sId;
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}
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self::$m_aModules[$sId] = $aArgs;
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// Now keep the relative paths, as provided
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/*
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foreach(self::$m_aFilesList as $sAttribute)
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{
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if (isset(self::$m_aModules[$sId][$sAttribute]))
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{
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// All the items below are list of files, that are relative to the current file
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// being loaded, let's update their path to store path relative to the application directory
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foreach(self::$m_aModules[$sId][$sAttribute] as $idx => $sRelativePath)
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{
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self::$m_aModules[$sId][$sAttribute][$idx] = self::$m_sModulePath.'/'.$sRelativePath;
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}
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}
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}
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*/
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// Populate automatically the list of dictionary files
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$aMatches = array();
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if(preg_match('|^([^/]+)|', $sId, $aMatches)) // ModuleName = everything before the first forward slash
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{
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$sModuleName = $aMatches[1];
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$sDir = dirname($sFilePath);
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$aDirs = [
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$sDir => self::$m_sModulePath,
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$sDir.'/dictionaries' => self::$m_sModulePath.'/dictionaries'
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];
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foreach ($aDirs as $sRootDir => $sPath)
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{
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if ($hDir = @opendir($sRootDir))
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{
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while (($sFile = readdir($hDir)) !== false)
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{
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$aMatches = array();
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if (preg_match("/^[^\\.]+.dict.$sModuleName.php$/i", $sFile, $aMatches)) // Dictionary files named like <Lang>.dict.<ModuleName>.php are loaded automatically
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{
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self::$m_aModules[$sId]['dictionary'][] = $sPath.'/'.$sFile;
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}
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}
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closedir($hDir);
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}
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}
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}
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}
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/**
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* Get the list of "discovered" modules, ordered based on their (inter) dependencies
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*
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* @param bool $bAbortOnMissingDependency ...
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* @param array $aModulesToLoad List of modules to search for, defaults to all if omitted
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*
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* @return array
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* @throws \MissingDependencyException
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*/
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protected static function GetModules($bAbortOnMissingDependency = false, $aModulesToLoad = null)
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{
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// Order the modules to take into account their inter-dependencies
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return self::OrderModulesByDependencies(self::$m_aModules, $bAbortOnMissingDependency, $aModulesToLoad);
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}
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/**
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* Arrange an list of modules, based on their (inter) dependencies
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* @param array $aModules The list of modules to process: 'id' => $aModuleInfo
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* @param bool $bAbortOnMissingDependency ...
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* @param array $aModulesToLoad List of modules to search for, defaults to all if omitted
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* @return array
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* @throws \MissingDependencyException
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*/
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public static function OrderModulesByDependencies($aModules, $bAbortOnMissingDependency = false, $aModulesToLoad = null)
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{
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// Order the modules to take into account their inter-dependencies
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$aDependencies = array();
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$aSelectedModules = array();
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foreach($aModules as $sId => $aModule)
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{
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list($sModuleName, ) = self::GetModuleName($sId);
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if (is_null($aModulesToLoad) || in_array($sModuleName, $aModulesToLoad))
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{
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$aDependencies[$sId] = $aModule['dependencies'];
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$aSelectedModules[$sModuleName] = true;
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}
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}
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ksort($aDependencies);
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$aOrderedModules = array();
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$iLoopCount = 1;
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while(($iLoopCount < count($aModules)) && (count($aDependencies) > 0) )
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{
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foreach($aDependencies as $sId => $aRemainingDeps)
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{
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$bDependenciesSolved = true;
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foreach($aRemainingDeps as $sDepId)
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{
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if (!self::DependencyIsResolved($sDepId, $aOrderedModules, $aSelectedModules))
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{
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$bDependenciesSolved = false;
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}
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}
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if ($bDependenciesSolved)
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{
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$aOrderedModules[] = $sId;
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unset($aDependencies[$sId]);
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}
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}
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$iLoopCount++;
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}
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if ($bAbortOnMissingDependency && count($aDependencies) > 0)
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{
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$aModulesInfo = array();
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$aModuleDeps = array();
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foreach($aDependencies as $sId => $aDeps)
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{
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$aModule = $aModules[$sId];
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$aModuleDeps[] = "{$aModule['label']} (id: $sId) depends on: ".implode(' + ', $aDeps);
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$aModulesInfo[$sId] = array('module' => $aModule, 'dependencies' => $aDeps);
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}
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$sMessage = "The following modules have unmet dependencies:\n".implode(",\n", $aModuleDeps);
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$oException = new MissingDependencyException($sMessage);
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$oException->aModulesInfo = $aModulesInfo;
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throw $oException;
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}
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// Return the ordered list, so that the dependencies are met...
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$aResult = array();
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foreach($aOrderedModules as $sId)
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{
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$aResult[$sId] = $aModules[$sId];
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}
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return $aResult;
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}
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/**
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* Remove the duplicate modules (i.e. modules with the same name but with a different version) from the supplied list of modules
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* @param array $aModules
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* @return array The ordered modules as a duplicate-free list of modules
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*/
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public static function RemoveDuplicateModules($aModules)
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{
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// No longer needed, kept only for compatibility
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// The de-duplication is now done directly by the AddModule method
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return $aModules;
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}
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protected static function DependencyIsResolved($sDepString, $aOrderedModules, $aSelectedModules)
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{
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$bResult = false;
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$aModuleVersions = array();
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// Separate the module names from their version for an easier comparison later
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foreach($aOrderedModules as $sModuleId)
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{
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$aMatches = array();
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if (preg_match('|^([^/]+)/(.*)$|', $sModuleId, $aMatches))
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{
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$aModuleVersions[$aMatches[1]] = $aMatches[2];
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}
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else
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{
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// No version number found, assume 1.0.0
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$aModuleVersions[$sModuleId] = '1.0.0';
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}
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}
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if (preg_match_all('/([^\(\)&| ]+)/', $sDepString, $aMatches))
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{
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$aReplacements = array();
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$aPotentialPrerequisites = array();
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foreach($aMatches as $aMatch)
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{
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foreach($aMatch as $sModuleId)
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{
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// $sModuleId in the dependency string is made of a <name>/<optional_operator><version>
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// where the operator is < <= = > >= (by default >=)
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$aModuleMatches = array();
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if(preg_match('|^([^/]+)/(<?>?=?)([^><=]+)$|', $sModuleId, $aModuleMatches))
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{
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$sModuleName = $aModuleMatches[1];
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$aPotentialPrerequisites[$sModuleName] = true;
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$sOperator = $aModuleMatches[2];
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if ($sOperator == '')
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{
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$sOperator = '>=';
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}
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$sExpectedVersion = $aModuleMatches[3];
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if (array_key_exists($sModuleName, $aModuleVersions))
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{
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// module is present, check the version
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$sCurrentVersion = $aModuleVersions[$sModuleName];
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if (version_compare($sCurrentVersion, $sExpectedVersion, $sOperator))
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{
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$aReplacements[$sModuleId] = '(true)'; // Add parentheses to protect against invalid condition causing
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// a function call that results in a runtime fatal error
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}
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else
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{
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$aReplacements[$sModuleId] = '(false)'; // Add parentheses to protect against invalid condition causing
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// a function call that results in a runtime fatal error
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}
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}
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else
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{
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// module is not present
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$aReplacements[$sModuleId] = '(false)'; // Add parentheses to protect against invalid condition causing
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// a function call that results in a runtime fatal error
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}
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}
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}
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}
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$bMissingPrerequisite = false;
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foreach (array_keys($aPotentialPrerequisites) as $sModuleName)
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{
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if (array_key_exists($sModuleName, $aSelectedModules))
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{
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// This module is actually a prerequisite
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if (!array_key_exists($sModuleName, $aModuleVersions))
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{
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$bMissingPrerequisite = true;
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}
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}
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}
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if ($bMissingPrerequisite)
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{
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$bResult = false;
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}
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else
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{
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$sBooleanExpr = str_replace(array_keys($aReplacements), array_values($aReplacements), $sDepString);
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$bOk = @eval('$bResult = '.$sBooleanExpr.'; return true;');
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if ($bOk == false)
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{
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SetupLog::Warning("Eval of '$sBooleanExpr' returned false");
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echo "Failed to parse the boolean Expression = '$sBooleanExpr'<br/>";
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}
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}
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}
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return $bResult;
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}
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/**
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* Search (on the disk) for all defined iTop modules, load them and returns the list (as an array)
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* of the possible iTop modules to install
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*
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* @param $aSearchDirs array of directories to search (absolute paths)
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* @param bool $bAbortOnMissingDependency ...
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* @param array $aModulesToLoad List of modules to search for, defaults to all if omitted
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*
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* @return array A big array moduleID => ModuleData
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* @throws \Exception
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*/
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public static function GetAvailableModules($aSearchDirs, $bAbortOnMissingDependency = false, $aModulesToLoad = null)
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{
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if (self::$m_aSearchDirs != $aSearchDirs)
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{
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self::ResetCache();
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}
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if (is_null(self::$m_aSearchDirs))
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{
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self::$m_aSearchDirs = $aSearchDirs;
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// Not in cache, let's scan the disk
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foreach($aSearchDirs as $sSearchDir)
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{
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$sLookupDir = realpath($sSearchDir);
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if ($sLookupDir == '')
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{
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throw new Exception("Invalid directory '$sSearchDir'");
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}
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clearstatcache();
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self::ListModuleFiles(basename($sSearchDir), dirname($sSearchDir));
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}
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return self::GetModules($bAbortOnMissingDependency, $aModulesToLoad);
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}
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else
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{
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// Reuse the previous results
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return self::GetModules($bAbortOnMissingDependency, $aModulesToLoad);
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}
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}
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public static function ResetCache()
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{
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self::$m_aSearchDirs = null;
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self::$m_aModules = array();
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self::$m_aModuleVersionByName = array();
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}
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/**
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* Helper function to interpret the name of a module
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* @param $sModuleId string Identifier of the module, in the form 'name/version'
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* @return array(name, version)
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*/
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public static function GetModuleName($sModuleId)
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{
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$aMatches = array();
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if (preg_match('!^(.*)/(.*)$!', $sModuleId, $aMatches))
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{
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$sName = $aMatches[1];
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$sVersion = $aMatches[2];
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}
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else
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{
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$sName = $sModuleId;
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$sVersion = "";
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}
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return array($sName, $sVersion);
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}
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/**
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* Helper function to browse a directory and get the modules
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*
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* @param $sRelDir string Directory to start from
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* @param $sRootDir string The root directory path
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*
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* @throws \Exception
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*/
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protected static function ListModuleFiles($sRelDir, $sRootDir)
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{
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static $iDummyClassIndex = 0;
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$sDirectory = $sRootDir.'/'.$sRelDir;
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if ($hDir = opendir($sDirectory))
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{
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// This is the correct way to loop over the directory. (according to the documentation)
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while (($sFile = readdir($hDir)) !== false)
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{
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$aMatches = array();
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if (is_dir($sDirectory.'/'.$sFile))
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{
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if (($sFile != '.') && ($sFile != '..') && ($sFile != '.svn') && ($sFile != 'vendor'))
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{
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self::ListModuleFiles($sRelDir.'/'.$sFile, $sRootDir);
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}
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}
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else if (preg_match('/^module\.(.*).php$/i', $sFile, $aMatches))
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{
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self::SetModulePath($sRelDir);
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try
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{
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$sModuleFileContents = file_get_contents($sDirectory.'/'.$sFile);
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$sModuleFileContents = str_replace(array('<?php', '?>'), '', $sModuleFileContents);
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$sModuleFileContents = str_replace('__FILE__', "'".addslashes($sDirectory.'/'.$sFile)."'", $sModuleFileContents);
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preg_match_all('/class ([A-Za-z0-9_]+) extends ([A-Za-z0-9_]+)/', $sModuleFileContents, $aMatches);
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//print_r($aMatches);
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$idx = 0;
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foreach($aMatches[1] as $sClassName)
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{
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if (class_exists($sClassName))
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{
|
|
// rename the class inside the code to prevent a "duplicate class" declaration
|
|
// and change its parent class as well so that nobody will find it and try to execute it
|
|
$sModuleFileContents = str_replace($sClassName.' extends '.$aMatches[2][$idx], $sClassName.'_'.($iDummyClassIndex++).' extends DummyHandler', $sModuleFileContents);
|
|
}
|
|
$idx++;
|
|
}
|
|
$bRet = eval($sModuleFileContents);
|
|
|
|
if ($bRet === false)
|
|
{
|
|
SetupLog::Warning("Eval of $sRelDir/$sFile returned false");
|
|
}
|
|
|
|
//echo "<p>Done.</p>\n";
|
|
}
|
|
catch(ParseError $e)
|
|
{
|
|
// PHP 7
|
|
SetupLog::Warning("Eval of $sRelDir/$sFile caused an exception: ".$e->getMessage()." at line ".$e->getLine());
|
|
}
|
|
catch(Exception $e)
|
|
{
|
|
// Continue...
|
|
SetupLog::Warning("Eval of $sRelDir/$sFile caused an exception: ".$e->getMessage());
|
|
}
|
|
}
|
|
}
|
|
closedir($hDir);
|
|
}
|
|
else
|
|
{
|
|
throw new Exception("Data directory (".$sDirectory.") not found or not readable.");
|
|
}
|
|
}
|
|
} // End of class
|
|
|
|
|
|
/** Alias for backward compatibility with old module files in which
|
|
* the declaration of a module invokes SetupWebPage::AddModule()
|
|
* whereas the new form is ModuleDiscovery::AddModule()
|
|
*/
|
|
class SetupWebPage extends ModuleDiscovery
|
|
{
|
|
// For backward compatibility with old modules...
|
|
public static function log_error($sText)
|
|
{
|
|
SetupLog::Error($sText);
|
|
}
|
|
|
|
public static function log_warning($sText)
|
|
{
|
|
SetupLog::Warning($sText);
|
|
}
|
|
|
|
public static function log_info($sText)
|
|
{
|
|
SetupLog::Info($sText);
|
|
}
|
|
|
|
public static function log_ok($sText)
|
|
{
|
|
SetupLog::Ok($sText);
|
|
}
|
|
|
|
public static function log($sText)
|
|
{
|
|
SetupLog::Ok($sText);
|
|
}
|
|
}
|
|
|
|
/** Ugly patch !!!
|
|
* In order to be able to analyse / load several times
|
|
* the same module file, we rename the class (to avoid duplicate class definitions)
|
|
* and we make the class extends the dummy class below in order to "deactivate" completely
|
|
* the class (in case some piece of code enumerate the classes derived from a well known class)
|
|
* Note that this will not work if someone enumerates the classes that implement a given interface
|
|
*/
|
|
class DummyHandler {
|
|
}
|
|
|