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See Release Notes

  • Bug fixes for general core bugs in 4.2.x will end 22 April 2024 (12 months).
  • Bug fixes for security issues in 4.2.x will end 7 October 2024 (18 months).
  • PHP version: minimum PHP 8.0.0 Note: minimum PHP version has increased since Moodle 4.1. PHP 8.1.x is supported too.
<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * @package    tool_xmldb
 * @copyright  2003 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

/**
 * This class verifies all the data introduced when editing a key for correctness,
 * performing changes / displaying errors depending of the results.
 *
 * @package    tool_xmldb
 * @copyright  2003 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class edit_key_save extends XMLDBAction {

    /**
     * Init method, every subclass will have its own
     */
    function init() {
        parent::init();

        // Set own custom attributes

        // Get needed strings
        $this->loadStrings(array(
            'keynameempty' => 'tool_xmldb',
            'incorrectkeyname' => 'tool_xmldb',
            'duplicatekeyname' => 'tool_xmldb',
            'nofieldsspecified' => 'tool_xmldb',
            'duplicatefieldsused' => 'tool_xmldb',
            'fieldsnotintable' => 'tool_xmldb',
            'fieldsusedinkey' => 'tool_xmldb',
            'fieldsusedinindex' => 'tool_xmldb',
            'noreftablespecified' => 'tool_xmldb',
            'wrongnumberofreffields' => 'tool_xmldb',
            'noreffieldsspecified' => 'tool_xmldb',
            'nomasterprimaryuniquefound' => 'tool_xmldb',
            'masterprimaryuniqueordernomatch' => 'tool_xmldb',
            'primarykeyonlyallownotnullfields' => 'tool_xmldb',
            'back' => 'tool_xmldb',
            'administration' => ''
        ));
    }

    /**
     * Invoke method, every class will have its own
     * returns true/false on completion, setting both
     * errormsg and output as necessary
     */
    function invoke() {
        parent::invoke();

        $result = true;

        // Set own core attributes
        //$this->does_generate = ACTION_NONE;
        $this->does_generate = ACTION_GENERATE_HTML;

        // These are always here
        global $CFG, $XMLDB;

        // Do the job, setting result as needed

        if (!data_submitted()) { // Basic prevention
< print_error('wrongcall', 'error');
> throw new \moodle_exception('wrongcall', 'error');
} // Get parameters $dirpath = required_param('dir', PARAM_PATH); $dirpath = $CFG->dirroot . $dirpath; $tableparam = strtolower(required_param('table', PARAM_PATH)); $keyparam = strtolower(required_param('key', PARAM_PATH)); $name = trim(strtolower(optional_param('name', $keyparam, PARAM_PATH))); $comment = required_param('comment', PARAM_CLEAN); $comment = trim($comment); $type = required_param('type', PARAM_INT); $fields = required_param('fields', PARAM_CLEAN); $fields = str_replace(' ', '', trim(strtolower($fields))); if ($type == XMLDB_KEY_FOREIGN || $type == XMLDB_KEY_FOREIGN_UNIQUE) { $reftable = trim(strtolower(required_param('reftable', PARAM_PATH))); $reffields= required_param('reffields', PARAM_CLEAN); $reffields = str_replace(' ', '', trim(strtolower($reffields))); } $editeddir = $XMLDB->editeddirs[$dirpath]; $structure = $editeddir->xml_file->getStructure(); $table = $structure->getTable($tableparam); $key = $table->getKey($keyparam); $oldhash = $key->getHash(); $errors = array(); // To store all the errors found // Perform some checks // Check empty name if (empty($name)) { $errors[] = $this->str['keynameempty']; } // Check incorrect name if ($name == 'changeme') { $errors[] = $this->str['incorrectkeyname']; } // Check duplicate name if ($keyparam != $name && $table->getKey($name)) { $errors[] = $this->str['duplicatekeyname']; } $fieldsarr = explode(',', $fields); // Check the fields isn't empty if (empty($fieldsarr[0])) { $errors[] = $this->str['nofieldsspecified']; } else { // Check that there aren't duplicate column names $uniquearr = array_unique($fieldsarr); if (count($fieldsarr) != count($uniquearr)) { $errors[] = $this->str['duplicatefieldsused']; } // Check that all the fields in belong to the table foreach ($fieldsarr as $field) { if (!$table->getField($field)) { $errors[] = $this->str['fieldsnotintable']; break; } } // If primary, check that all the fields are not null if ($type == XMLDB_KEY_PRIMARY) { foreach ($fieldsarr as $field) { if ($fi = $table->getField($field)) { if (!$fi->getNotNull()) { $errors[] = $this->str['primarykeyonlyallownotnullfields']; break; } } } } // Check that there isn't any key using exactly the same fields $tablekeys = $table->getKeys(); if ($tablekeys) { foreach ($tablekeys as $tablekey) { // Skip checking against itself if ($keyparam == $tablekey->getName()) { continue; } $keyfieldsarr = $tablekey->getFields(); // Compare both arrays, looking for diferences $diferences = array_merge(array_diff($fieldsarr, $keyfieldsarr), array_diff($keyfieldsarr, $fieldsarr)); if (empty($diferences)) { $errors[] = $this->str['fieldsusedinkey']; break; } } } // Check that there isn't any index using exactlt the same fields $tableindexes = $table->getIndexes(); if ($tableindexes) { foreach ($tableindexes as $tableindex) { $indexfieldsarr = $tableindex->getFields(); // Compare both arrays, looking for diferences $diferences = array_merge(array_diff($fieldsarr, $indexfieldsarr), array_diff($indexfieldsarr, $fieldsarr)); if (empty($diferences)) { $errors[] = $this->str['fieldsusedinindex']; break; } } } // If foreign key if ($type == XMLDB_KEY_FOREIGN || $type == XMLDB_KEY_FOREIGN_UNIQUE) { $reffieldsarr = explode(',', $reffields); // Check reftable is not empty if (empty($reftable)) { $errors[] = $this->str['noreftablespecified']; } else // Check reffields are not empty if (empty($reffieldsarr[0])) { $errors[] = $this->str['noreffieldsspecified']; } else // Check the number of fields is correct if (count($fieldsarr) != count($reffieldsarr)) { $errors[] = $this->str['wrongnumberofreffields']; } else { // Check, if pointing to one structure table, that there is one master key for this key if ($rt = $structure->getTable($reftable)) { $masterfound = false; $reftablekeys = $rt->getKeys(); if ($reftablekeys) { foreach ($reftablekeys as $reftablekey) { // Only compare with primary and unique keys if ($reftablekey->getType() != XMLDB_KEY_PRIMARY && $reftablekey->getType() != XMLDB_KEY_UNIQUE) { continue; } $keyfieldsarr = $reftablekey->getFields(); // Compare both arrays, looking for diferences $diferences = array_merge(array_diff($reffieldsarr, $keyfieldsarr), array_diff($keyfieldsarr, $reffieldsarr)); if (empty($diferences)) { $masterfound = true; break; } } if (!$masterfound) { $errors[] = $this->str['nomasterprimaryuniquefound']; } else { // Quick test of the order if (implode(',', $reffieldsarr) != implode(',', $keyfieldsarr)) { $errors[] = $this->str['masterprimaryuniqueordernomatch']; } } } } } } } if (!empty($errors)) { $tempkey = new xmldb_key($name); $tempkey->setType($type); $tempkey->setFields($fieldsarr); if ($type == XMLDB_KEY_FOREIGN || $type == XMLDB_KEY_FOREIGN_UNIQUE) { $tempkey->setRefTable($reftable); $tempkey->setRefFields($reffieldsarr); } // Prepare the output $o = '<p>' .implode(', ', $errors) . '</p> <p>' . $name . ': ' . $tempkey->readableInfo() . '</p>'; $o.= '<a href="index.php?action=edit_key&amp;key=' .$key->getName() . '&amp;table=' . $table->getName() . '&amp;dir=' . urlencode(str_replace($CFG->dirroot, '', $dirpath)) . '">[' . $this->str['back'] . ']</a>'; $this->output = $o; } // Continue if we aren't under errors if (empty($errors)) { // If there is one name change, do it, changing the prev and next // attributes of the adjacent fields if ($keyparam != $name) { $key->setName($name); if ($key->getPrevious()) { $prev = $table->getKey($key->getPrevious()); $prev->setNext($name); $prev->setChanged(true); } if ($key->getNext()) { $next = $table->getKey($key->getNext()); $next->setPrevious($name); $next->setChanged(true); } } // Set comment $key->setComment($comment); // Set the rest of fields $key->setType($type); $key->setFields($fieldsarr); if ($type == XMLDB_KEY_FOREIGN || $type == XMLDB_KEY_FOREIGN_UNIQUE) { $key->setRefTable($reftable); $key->setRefFields($reffieldsarr); } // If the hash has changed from the old one, change the version // and mark the structure as changed $key->calculateHash(true); if ($oldhash != $key->getHash()) { $key->setChanged(true); $table->setChanged(true); // Recalculate the structure hash $structure->calculateHash(true); $structure->setVersion(userdate(time(), '%Y%m%d', 99, false)); // Mark as changed $structure->setChanged(true); } // Launch postaction if exists (leave this here!) if ($this->getPostAction() && $result) { return $this->launch($this->getPostAction()); } } // Return ok if arrived here return $result; } }