Petr Škoda
576 lines
20 KiB
PHP
576 lines
20 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU 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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// Moodle 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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Provides validation class to check the plugin ZIP contents
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*
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* Uses fragments of the local_plugins_archive_validator class copyrighted by
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* Marina Glancy that is part of the local_plugins plugin.
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*
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* @package tool_installaddon
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* @subpackage classes
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* @copyright 2013 David Mudrak <david@moodle.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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if (!defined('T_ML_COMMENT')) {
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define('T_ML_COMMENT', T_COMMENT);
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} else {
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define('T_DOC_COMMENT', T_ML_COMMENT);
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}
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/**
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* Validates the contents of extracted plugin ZIP file
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*
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* @copyright 2013 David Mudrak <david@moodle.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class tool_installaddon_validator {
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/** Critical error message level, causes the validation fail. */
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const ERROR = 'error';
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/** Warning message level, validation does not fail but the admin should be always informed. */
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const WARNING = 'warning';
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/** Information message level that the admin should be aware of. */
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const INFO = 'info';
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/** Debugging message level, should be displayed in debugging mode only. */
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const DEBUG = 'debug';
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/** @var string full path to the extracted ZIP contents */
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protected $extractdir = null;
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/** @var array as returned by {@link zip_packer::extract_to_pathname()} */
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protected $extractfiles = null;
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/** @var bool overall result of validation */
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protected $result = null;
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/** @var string the name of the plugin root directory */
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protected $rootdir = null;
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/** @var array explicit list of expected/required characteristics of the ZIP */
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protected $assertions = null;
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/** @var array of validation log messages */
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protected $messages = array();
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/** @var array|null array of relevant data obtained from version.php */
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protected $versionphp = null;
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/** @var string|null the name of found English language file without the .php extension */
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protected $langfilename = null;
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/** @var moodle_url|null URL to continue with the installation of validated add-on */
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protected $continueurl = null;
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/**
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* Factory method returning instance of the validator
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*
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* @param string $zipcontentpath full path to the extracted ZIP contents
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* @param array $zipcontentfiles (string)filerelpath => (bool|string)true or error
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* @return tool_installaddon_validator
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*/
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public static function instance($zipcontentpath, array $zipcontentfiles) {
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return new static($zipcontentpath, $zipcontentfiles);
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}
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/**
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* Set the expected plugin type, fail the validation otherwise
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*
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* @param string $required plugin type
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*/
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public function assert_plugin_type($required) {
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$this->assertions['plugintype'] = $required;
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}
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/**
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* Set the expectation that the plugin can be installed into the given Moodle version
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*
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* @param string $required Moodle version we are about to install to
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*/
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public function assert_moodle_version($required) {
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$this->assertions['moodleversion'] = $required;
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}
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/**
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* Execute the validation process against all explicit and implicit requirements
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*
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* Returns true if the validation passes (all explicit and implicit requirements
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* pass) and the plugin can be installed. Returns false if the validation fails
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* (some explicit or implicit requirement fails) and the plugin must not be
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* installed.
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*
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* @return bool
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*/
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public function execute() {
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$this->result = (
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$this->validate_files_layout()
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and $this->validate_version_php()
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and $this->validate_language_pack()
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and $this->validate_target_location()
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);
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return $this->result;
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}
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/**
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* Returns overall result of the validation.
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*
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* Null is returned if the validation has not been executed yet. Otherwise
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* this method returns true (the installation can continue) or false (it is not
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* safe to continue with the installation).
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*
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* @return bool|null
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*/
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public function get_result() {
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return $this->result;
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}
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/**
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* Return the list of validation log messages
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*
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* Each validation message is a plain object with properties level, msgcode
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* and addinfo.
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*
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* @return array of (int)index => (stdClass) validation message
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*/
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public function get_messages() {
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return $this->messages;
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}
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/**
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* Return the information provided by the the plugin's version.php
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*
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* If version.php was not found in the plugin (which is tolerated for
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* themes only at the moment), null is returned. Otherwise the array
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* is returned. It may be empty if no information was parsed (which
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* should not happen).
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*
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* @return null|array
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*/
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public function get_versionphp_info() {
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return $this->versionphp;
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}
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/**
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* Returns the name of the English language file without the .php extension
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*
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* This can be used as a suggestion for fixing the plugin root directory in the
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* ZIP file during the upload. If no file was found, or multiple PHP files are
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* located in lang/en/ folder, then null is returned.
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*
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* @return null|string
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*/
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public function get_language_file_name() {
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return $this->langfilename;
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}
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/**
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* Returns the rootdir of the extracted package (after eventual renaming)
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*
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* @return string|null
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*/
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public function get_rootdir() {
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return $this->rootdir;
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}
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/**
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* Sets the URL to continue to after successful validation
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*
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* @param moodle_url $url
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*/
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public function set_continue_url(moodle_url $url) {
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$this->continueurl = $url;
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}
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/**
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* Get the URL to continue to after successful validation
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*
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* Null is returned if the URL has not been explicitly set by the caller.
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*
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* @return moodle_url|null
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*/
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public function get_continue_url() {
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return $this->continueurl;
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}
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// End of external API /////////////////////////////////////////////////////
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/**
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* @param string $zipcontentpath full path to the extracted ZIP contents
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* @param array $zipcontentfiles (string)filerelpath => (bool|string)true or error
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*/
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protected function __construct($zipcontentpath, array $zipcontentfiles) {
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$this->extractdir = $zipcontentpath;
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$this->extractfiles = $zipcontentfiles;
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}
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// Validation methods //////////////////////////////////////////////////////
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/**
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* @return bool false if files in the ZIP do not have required layout
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*/
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protected function validate_files_layout() {
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if (!is_array($this->extractfiles) or count($this->extractfiles) < 4) {
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// We need the English language pack with the name of the plugin at least
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$this->add_message(self::ERROR, 'filesnumber');
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return false;
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}
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foreach ($this->extractfiles as $filerelname => $filestatus) {
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if ($filestatus !== true) {
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$this->add_message(self::ERROR, 'filestatus', array('file' => $filerelname, 'status' => $filestatus));
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return false;
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}
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}
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foreach (array_keys($this->extractfiles) as $filerelname) {
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if (!file_exists($this->extractdir.'/'.$filerelname)) {
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$this->add_message(self::ERROR, 'filenotexists', array('file' => $filerelname));
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return false;
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}
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}
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foreach (array_keys($this->extractfiles) as $filerelname) {
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$matches = array();
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if (!preg_match("#^([^/]+)/#", $filerelname, $matches) or (!is_null($this->rootdir) and $this->rootdir !== $matches[1])) {
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$this->add_message(self::ERROR, 'onedir');
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return false;
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}
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$this->rootdir = $matches[1];
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}
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if ($this->rootdir !== clean_param($this->rootdir, PARAM_PLUGIN)) {
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$this->add_message(self::ERROR, 'rootdirinvalid', $this->rootdir);
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return false;
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} else {
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$this->add_message(self::INFO, 'rootdir', $this->rootdir);
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}
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return is_dir($this->extractdir.'/'.$this->rootdir);
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}
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/**
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* @return bool false if the version.php file does not declare required information
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*/
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protected function validate_version_php() {
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if (!isset($this->assertions['plugintype'])) {
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throw new coding_exception('Required plugin type must be set before calling this');
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}
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if (!isset($this->assertions['moodleversion'])) {
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throw new coding_exception('Required Moodle version must be set before calling this');
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}
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$fullpath = $this->extractdir.'/'.$this->rootdir.'/version.php';
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if (!file_exists($fullpath)) {
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// This is tolerated for themes only.
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if ($this->assertions['plugintype'] === 'theme') {
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$this->add_message(self::DEBUG, 'missingversionphp');
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return true;
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} else {
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$this->add_message(self::ERROR, 'missingversionphp');
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return false;
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}
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}
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$this->versionphp = array();
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$info = $this->parse_version_php($fullpath);
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if ($this->assertions['plugintype'] === 'mod') {
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$type = 'module';
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} else {
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$type = 'plugin';
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}
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if (!isset($info[$type.'->version'])) {
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if ($type === 'module' and isset($info['plugin->version'])) {
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// Expect the activity module using $plugin in version.php instead of $module.
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$type = 'plugin';
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$this->versionphp['version'] = $info[$type.'->version'];
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$this->add_message(self::INFO, 'pluginversion', $this->versionphp['version']);
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} else {
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$this->add_message(self::ERROR, 'missingversion');
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return false;
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}
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} else {
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$this->versionphp['version'] = $info[$type.'->version'];
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$this->add_message(self::INFO, 'pluginversion', $this->versionphp['version']);
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}
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if (isset($info[$type.'->requires'])) {
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$this->versionphp['requires'] = $info[$type.'->requires'];
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if ($this->versionphp['requires'] > $this->assertions['moodleversion']) {
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$this->add_message(self::ERROR, 'requiresmoodle', $this->versionphp['requires']);
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return false;
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}
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$this->add_message(self::INFO, 'requiresmoodle', $this->versionphp['requires']);
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}
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if (isset($info[$type.'->component'])) {
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$this->versionphp['component'] = $info[$type.'->component'];
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list($reqtype, $reqname) = core_component::normalize_component($this->versionphp['component']);
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if ($reqtype !== $this->assertions['plugintype']) {
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$this->add_message(self::ERROR, 'componentmismatchtype', array(
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'expected' => $this->assertions['plugintype'],
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'found' => $reqtype));
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return false;
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}
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if ($reqname !== $this->rootdir) {
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$this->add_message(self::ERROR, 'componentmismatchname', $reqname);
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return false;
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}
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$this->add_message(self::INFO, 'componentmatch', $this->versionphp['component']);
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}
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if (isset($info[$type.'->maturity'])) {
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$this->versionphp['maturity'] = $info[$type.'->maturity'];
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if ($this->versionphp['maturity'] === 'MATURITY_STABLE') {
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$this->add_message(self::INFO, 'maturity', $this->versionphp['maturity']);
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} else {
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$this->add_message(self::WARNING, 'maturity', $this->versionphp['maturity']);
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}
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}
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if (isset($info[$type.'->release'])) {
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$this->versionphp['release'] = $info[$type.'->release'];
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$this->add_message(self::INFO, 'release', $this->versionphp['release']);
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}
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return true;
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}
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/**
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* @return bool false if the English language pack is not provided correctly
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*/
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protected function validate_language_pack() {
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if (!isset($this->assertions['plugintype'])) {
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throw new coding_exception('Required plugin type must be set before calling this');
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}
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if (!isset($this->extractfiles[$this->rootdir.'/lang/en/'])
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or $this->extractfiles[$this->rootdir.'/lang/en/'] !== true
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or !is_dir($this->extractdir.'/'.$this->rootdir.'/lang/en')) {
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$this->add_message(self::ERROR, 'missinglangenfolder');
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return false;
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}
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$langfiles = array();
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foreach (array_keys($this->extractfiles) as $extractfile) {
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$matches = array();
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if (preg_match('#^'.preg_quote($this->rootdir).'/lang/en/([^/]+).php?$#i', $extractfile, $matches)) {
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$langfiles[] = $matches[1];
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}
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}
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if (empty($langfiles)) {
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$this->add_message(self::ERROR, 'missinglangenfile');
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return false;
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} else if (count($langfiles) > 1) {
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$this->add_message(self::WARNING, 'multiplelangenfiles');
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} else {
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$this->langfilename = $langfiles[0];
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$this->add_message(self::DEBUG, 'foundlangfile', $this->langfilename);
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}
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if ($this->assertions['plugintype'] === 'mod') {
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$expected = $this->rootdir.'.php';
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} else {
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$expected = $this->assertions['plugintype'].'_'.$this->rootdir.'.php';
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}
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if (!isset($this->extractfiles[$this->rootdir.'/lang/en/'.$expected])
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or $this->extractfiles[$this->rootdir.'/lang/en/'.$expected] !== true
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or !is_file($this->extractdir.'/'.$this->rootdir.'/lang/en/'.$expected)) {
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$this->add_message(self::ERROR, 'missingexpectedlangenfile', $expected);
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return false;
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}
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return true;
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}
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/**
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* @return bool false of the given add-on can't be installed into its location
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*/
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public function validate_target_location() {
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if (!isset($this->assertions['plugintype'])) {
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throw new coding_exception('Required plugin type must be set before calling this');
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}
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$plugintypepath = $this->get_plugintype_location($this->assertions['plugintype']);
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if (is_null($plugintypepath)) {
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$this->add_message(self::ERROR, 'unknowntype', $this->assertions['plugintype']);
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return false;
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}
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if (!is_dir($plugintypepath)) {
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throw new coding_exception('Plugin type location does not exist!');
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}
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$target = $plugintypepath.'/'.$this->rootdir;
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if (file_exists($target)) {
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$this->add_message(self::ERROR, 'targetexists', $target);
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return false;
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}
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if (is_writable($plugintypepath)) {
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$this->add_message(self::INFO, 'pathwritable', $plugintypepath);
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} else {
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$this->add_message(self::ERROR, 'pathwritable', $plugintypepath);
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return false;
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}
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return true;
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}
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// Helper methods //////////////////////////////////////////////////////////
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/**
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* Get as much information from existing version.php as possible
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*
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* @param string full path to the version.php file
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* @return array of found meta-info declarations
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*/
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protected function parse_version_php($fullpath) {
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$content = $this->get_stripped_file_contents($fullpath);
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preg_match_all('#\$((plugin|module)\->(version|maturity|release|requires))=()(\d+(\.\d+)?);#m', $content, $matches1);
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preg_match_all('#\$((plugin|module)\->(maturity))=()(MATURITY_\w+);#m', $content, $matches2);
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preg_match_all('#\$((plugin|module)\->(release))=([\'"])(.*?)\4;#m', $content, $matches3);
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preg_match_all('#\$((plugin|module)\->(component))=([\'"])(.+?_.+?)\4;#m', $content, $matches4);
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if (count($matches1[1]) + count($matches2[1]) + count($matches3[1]) + count($matches4[1])) {
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$info = array_combine(
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array_merge($matches1[1], $matches2[1], $matches3[1], $matches4[1]),
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array_merge($matches1[5], $matches2[5], $matches3[5], $matches4[5])
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);
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} else {
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$info = array();
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}
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return $info;
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}
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/**
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* Append the given message to the messages log
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*
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* @param string $level e.g. self::ERROR
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* @param string $msgcode may form a string
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* @param string|array|object $a optional additional info suitable for {@link get_string()}
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*/
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protected function add_message($level, $msgcode, $a = null) {
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$msg = (object)array(
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'level' => $level,
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'msgcode' => $msgcode,
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'addinfo' => $a,
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);
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$this->messages[] = $msg;
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}
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/**
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* Returns bare PHP code from the given file
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*
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* Returns contents without PHP opening and closing tags, text outside php code,
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* comments and extra whitespaces.
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*
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* @param string $fullpath full path to the file
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* @return string
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*/
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protected function get_stripped_file_contents($fullpath) {
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$source = file_get_contents($fullpath);
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$tokens = token_get_all($source);
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$output = '';
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$doprocess = false;
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foreach ($tokens as $token) {
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if (is_string($token)) {
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// Simple one character token.
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$id = -1;
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$text = $token;
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} else {
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// Token array.
|
|
list($id, $text) = $token;
|
|
}
|
|
switch ($id) {
|
|
case T_WHITESPACE:
|
|
case T_COMMENT:
|
|
case T_ML_COMMENT:
|
|
case T_DOC_COMMENT:
|
|
// Ignore whitespaces, inline comments, multiline comments and docblocks.
|
|
break;
|
|
case T_OPEN_TAG:
|
|
// Start processing.
|
|
$doprocess = true;
|
|
break;
|
|
case T_CLOSE_TAG:
|
|
// Stop processing.
|
|
$doprocess = false;
|
|
break;
|
|
default:
|
|
// Anything else is within PHP tags, return it as is.
|
|
if ($doprocess) {
|
|
$output .= $text;
|
|
if ($text === 'function') {
|
|
// Explicitly keep the whitespace that would be ignored.
|
|
$output .= ' ';
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
return $output;
|
|
}
|
|
|
|
|
|
/**
|
|
* Returns the full path to the root directory of the given plugin type
|
|
*
|
|
* @param string $plugintype
|
|
* @return string|null
|
|
*/
|
|
public function get_plugintype_location($plugintype) {
|
|
|
|
$plugintypepath = null;
|
|
|
|
foreach (core_component::get_plugin_types() as $type => $fullpath) {
|
|
if ($type === $plugintype) {
|
|
$plugintypepath = $fullpath;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return $plugintypepath;
|
|
}
|
|
}
|