skodak
306 lines
13 KiB
PHP
306 lines
13 KiB
PHP
<?php // $Id$
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///////////////////////////////////////////////////////////////////////////
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// //
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// NOTICE OF COPYRIGHT //
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// //
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// Moodle - Modular Object-Oriented Dynamic Learning Environment //
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// http://moodle.com //
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// //
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// Copyright (C) 2001-3001 Martin Dougiamas http://dougiamas.com //
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// (C) 2001-3001 Eloy Lafuente (stronk7) http://contiento.com //
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// //
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// This program 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 2 of the License, or //
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// (at your option) any later version. //
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// //
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// This program 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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// http://www.gnu.org/copyleft/gpl.html //
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// //
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///////////////////////////////////////////////////////////////////////////
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/// This class will save the changes performed to one key
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class edit_key_save extends XMLDBAction {
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/**
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* Init method, every subclass will have its own
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*/
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function init() {
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parent::init();
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/// Set own custom attributes
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/// Get needed strings
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$this->loadStrings(array(
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'keynameempty' => 'xmldb',
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'incorrectkeyname' => 'xmldb',
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'duplicatekeyname' => 'xmldb',
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'nofieldsspecified' => 'xmldb',
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'duplicatefieldsused' => 'xmldb',
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'fieldsnotintable' => 'xmldb',
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'fieldsusedinkey' => 'xmldb',
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'fieldsusedinindex' => 'xmldb',
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'noreftablespecified' => 'xmldb',
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'wrongnumberofreffields' => 'xmldb',
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'noreffieldsspecified' => 'xmldb',
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'nomasterprimaryuniquefound' => 'xmldb',
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'masterprimaryuniqueordernomatch' => 'xmldb',
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'primarykeyonlyallownotnullfields' => 'xmldb',
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'administration' => ''
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));
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}
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/**
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* Invoke method, every class will have its own
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* returns true/false on completion, setting both
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* errormsg and output as necessary
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*/
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function invoke() {
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parent::invoke();
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$result = true;
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/// Set own core attributes
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$this->does_generate = ACTION_NONE;
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//$this->does_generate = ACTION_GENERATE_HTML;
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/// These are always here
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global $CFG, $XMLDB;
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/// Do the job, setting result as needed
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if (!data_submitted('nomatch')) { ///Basic prevention
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error('Wrong action call');
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}
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/// Get parameters
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$dirpath = required_param('dir', PARAM_PATH);
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$dirpath = $CFG->dirroot . stripslashes_safe($dirpath);
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$tableparam = strtolower(required_param('table', PARAM_PATH));
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$keyparam = strtolower(required_param('key', PARAM_PATH));
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$name = trim(strtolower(optional_param('name', $keyparam, PARAM_PATH)));
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$comment = required_param('comment', PARAM_CLEAN);
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$comment = trim(stripslashes_safe($comment));
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$type = required_param('type', PARAM_INT);
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$fields = required_param('fields', PARAM_CLEAN);
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$fields = str_replace(' ', '', trim(strtolower(stripslashes_safe($fields))));
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if ($type == XMLDB_KEY_FOREIGN ||
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$type == XMLDB_KEY_FOREIGN_UNIQUE) {
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$reftable = trim(strtolower(required_param('reftable', PARAM_PATH)));
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$reffields= required_param('reffields', PARAM_CLEAN);
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$reffields = str_replace(' ', '', trim(strtolower(stripslashes_safe($reffields))));
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}
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$editeddir =& $XMLDB->editeddirs[$dirpath];
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$structure =& $editeddir->xml_file->getStructure();
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$table =& $structure->getTable($tableparam);
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$key =& $table->getKey($keyparam);
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$oldhash = $key->getHash();
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$errors = array(); /// To store all the errors found
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/// Perform some checks
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/// Check empty name
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if (empty($name)) {
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$errors[] = $this->str['keynameempty'];
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}
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/// Check incorrect name
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if ($name == 'changeme') {
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$errors[] = $this->str['incorrectkeyname'];
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}
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/// Check duplicate name
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if ($keyparam != $name && $table->getKey($name)) {
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$errors[] = $this->str['duplicatekeyname'];
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}
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$fieldsarr = explode(',', $fields);
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/// Check the fields isn't empty
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if (empty($fieldsarr[0])) {
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$errors[] = $this->str['nofieldsspecified'];
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} else {
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/// Check that there aren't duplicate column names
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$uniquearr = array_unique($fieldsarr);
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if (count($fieldsarr) != count($uniquearr)) {
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$errors[] = $this->str['duplicatefieldsused'];
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}
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/// Check that all the fields in belong to the table
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foreach ($fieldsarr as $field) {
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if (!$table->getField($field)) {
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$errors[] = $this->str['fieldsnotintable'];
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break;
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}
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}
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/// If primary, check that all the fields are not null
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if ($type == XMLDB_KEY_PRIMARY) {
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foreach ($fieldsarr as $field) {
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if ($fi = $table->getField($field)) {
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if (!$fi->getNotNull()) {
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$errors[] = $this->str['primarykeyonlyallownotnullfields'];
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break;
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}
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}
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}
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}
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/// Check that there isn't any key using exactly the same fields
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$tablekeys = $table->getKeys();
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if ($tablekeys) {
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foreach ($tablekeys as $tablekey) {
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/// Skip checking against itself
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if ($keyparam == $tablekey->getName()) {
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continue;
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}
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$keyfieldsarr = $tablekey->getFields();
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/// Compare both arrays, looking for diferences
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$diferences = array_merge(array_diff($fieldsarr, $keyfieldsarr), array_diff($keyfieldsarr, $fieldsarr));
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if (empty($diferences)) {
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$errors[] = $this->str['fieldsusedinkey'];
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break;
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}
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}
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}
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/// Check that there isn't any index using exactlt the same fields
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$tableindexes = $table->getIndexes();
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if ($tableindexes) {
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foreach ($tableindexes as $tableindex) {
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$indexfieldsarr = $tableindex->getFields();
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/// Compare both arrays, looking for diferences
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$diferences = array_merge(array_diff($fieldsarr, $indexfieldsarr), array_diff($indexfieldsarr, $fieldsarr));
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if (empty($diferences)) {
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$errors[] = $this->str['fieldsusedinindex'];
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break;
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}
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}
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}
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/// If foreign key
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if ($type == XMLDB_KEY_FOREIGN ||
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$type == XMLDB_KEY_FOREIGN_UNIQUE) {
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$reffieldsarr = explode(',', $reffields);
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/// Check reftable is not empty
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if (empty($reftable)) {
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$errors[] = $this->str['noreftablespecified'];
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} else
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/// Check reffields are not empty
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if (empty($reffieldsarr[0])) {
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$errors[] = $this->str['noreffieldsspecified'];
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} else
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/// Check the number of fields is correct
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if (count($fieldsarr) != count($reffieldsarr)) {
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$errors[] = $this->str['wrongnumberofreffields'];
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} else {
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/// Check, if pointing to one structure table, that there is one master key for this key
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if ($rt = $structure->getTable($reftable)) {
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$masterfound = false;
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$reftablekeys = $rt->getKeys();
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if ($reftablekeys) {
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foreach ($reftablekeys as $reftablekey) {
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/// Only compare with primary and unique keys
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if ($reftablekey->getType() != XMLDB_KEY_PRIMARY && $reftablekey->getType() != XMLDB_KEY_UNIQUE) {
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continue;
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}
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$keyfieldsarr = $reftablekey->getFields();
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/// Compare both arrays, looking for diferences
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$diferences = array_merge(array_diff($reffieldsarr, $keyfieldsarr), array_diff($keyfieldsarr, $reffieldsarr));
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if (empty($diferences)) {
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$masterfound = true;
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break;
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}
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}
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if (!$masterfound) {
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$errors[] = $this->str['nomasterprimaryuniquefound'];
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} else {
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/// Quick test of the order
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if (implode(',', $reffieldsarr) != implode(',', $keyfieldsarr)) {
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$errors[] = $this->str['masterprimaryuniqueordernomatch'];
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}
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}
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}
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}
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}
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}
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}
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if (!empty($errors)) {
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$tempkey = new XMLDBKey($name);
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$tempkey->setType($type);
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$tempkey->setFields($fieldsarr);
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if ($type == XMLDB_KEY_FOREIGN ||
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$type == XMLDB_KEY_FOREIGN_UNIQUE) {
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$tempkey->setRefTable($reftable);
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$tempkey->setRefFields($reffieldsarr);
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}
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/// Prepare the output
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$site = get_site();
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print_header("$site->shortname: XMLDB",
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"$site->fullname",
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"<a href=\"../index.php\">" . $this->str['administration'] . "</a> -> <a href=\"index.php\">XMLDB</a>");
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notice ('<p>' .implode(', ', $errors) . '</p>
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<p>' . $tempkey->readableInfo(),
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'index.php?action=edit_key&key=' .$key->getName() . '&table=' . $table->getName() . '&dir=' . urlencode(str_replace($CFG->dirroot, '', $dirpath)));
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die; /// re-die :-P
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}
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/// Continue if we aren't under errors
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if (empty($errors)) {
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/// If there is one name change, do it, changing the prev and next
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/// atributes of the adjacent fields
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if ($keyparam != $name) {
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$key->setName($name);
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if ($key->getPrevious()) {
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$prev =& $table->getKey($key->getPrevious());
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$prev->setNext($name);
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$prev->setChanged(true);
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}
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if ($key->getNext()) {
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$next =& $table->getKey($key->getNext());
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$next->setPrevious($name);
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$next->setChanged(true);
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}
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}
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/// Set comment
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$key->setComment($comment);
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/// Set the rest of fields
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$key->setType($type);
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$key->setFields($fieldsarr);
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if ($type == XMLDB_KEY_FOREIGN ||
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$type == XMLDB_KEY_FOREIGN_UNIQUE) {
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$key->setRefTable($reftable);
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$key->setRefFields($reffieldsarr);
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}
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/// If the hash has changed from the old one, change the version
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/// and mark the structure as changed
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$key->calculateHash(true);
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if ($oldhash != $key->getHash()) {
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$key->setChanged(true);
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$table->setChanged(true);
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/// Recalculate the structure hash
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$structure->calculateHash(true);
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$structure->setVersion(userdate(time(), '%Y%m%d', 99, false));
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/// Mark as changed
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$structure->setChanged(true);
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}
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/// Launch postaction if exists (leave this here!)
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if ($this->getPostAction() && $result) {
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return $this->launch($this->getPostAction());
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}
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}
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/// Return ok if arrived here
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return $result;
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}
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}
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?>
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