1<?php 2/* 3 +-----------------------------------------------------------------------------+ 4 | ILIAS open source | 5 +-----------------------------------------------------------------------------+ 6 | Copyright (c) 1998-2001 ILIAS open source, University of Cologne | 7 | | 8 | This program is free software; you can redistribute it and/or | 9 | modify it under the terms of the GNU General Public License | 10 | as published by the Free Software Foundation; either version 2 | 11 | of the License, or (at your option) any later version. | 12 | | 13 | This program is distributed in the hope that it will be useful, | 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | 16 | GNU General Public License for more details. | 17 | | 18 | You should have received a copy of the GNU General Public License | 19 | along with this program; if not, write to the Free Software | 20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | 21 +-----------------------------------------------------------------------------+ 22*/ 23 24 25/** 26* Meta Data class (element meta_data) 27* 28* @package ilias-core 29* @version $Id$ 30*/ 31include_once 'class.ilMDBase.php'; 32 33class ilMDMetaMetadata extends ilMDBase 34{ 35 public function getPossibleSubelements() 36 { 37 $subs['Identifier'] = 'meta_identifier'; 38 $subs['Contribute'] = 'meta_contribute'; 39 40 return $subs; 41 } 42 43 44 // SUBELEMENTS 45 public function &getIdentifierIds() 46 { 47 include_once 'Services/MetaData/classes/class.ilMDIdentifier.php'; 48 49 return ilMDIdentifier::_getIds($this->getRBACId(), $this->getObjId(), $this->getMetaId(), 'meta_meta_data'); 50 } 51 public function &getIdentifier($a_identifier_id) 52 { 53 include_once 'Services/MetaData/classes/class.ilMDIdentifier.php'; 54 55 if (!$a_identifier_id) { 56 return false; 57 } 58 $ide = new ilMDIdentifier(); 59 $ide->setMetaId($a_identifier_id); 60 61 return $ide; 62 } 63 public function &addIdentifier() 64 { 65 include_once 'Services/MetaData/classes/class.ilMDIdentifier.php'; 66 67 $ide = new ilMDIdentifier($this->getRBACId(), $this->getObjId(), $this->getObjType()); 68 $ide->setParentId($this->getMetaId()); 69 $ide->setParentType('meta_meta_data'); 70 71 return $ide; 72 } 73 74 public function &getContributeIds() 75 { 76 include_once 'Services/MetaData/classes/class.ilMDContribute.php'; 77 78 return ilMDContribute::_getIds($this->getRBACId(), $this->getObjId(), $this->getMetaId(), 'meta_meta_data'); 79 } 80 public function &getContribute($a_contribute_id) 81 { 82 include_once 'Services/MetaData/classes/class.ilMDContribute.php'; 83 84 if (!$a_contribute_id) { 85 return false; 86 } 87 $con = new ilMDContribute(); 88 $con->setMetaId($a_contribute_id); 89 90 return $con; 91 } 92 public function &addContribute() 93 { 94 include_once 'Services/MetaData/classes/class.ilMDContribute.php'; 95 96 $con = new ilMDContribute($this->getRBACId(), $this->getObjId(), $this->getObjType()); 97 $con->setParentId($this->getMetaId()); 98 $con->setParentType('meta_meta_data'); 99 100 return $con; 101 } 102 103 104 105 // SET/GET 106 public function setMetaDataScheme($a_val) 107 { 108 $this->meta_data_scheme = $a_val; 109 } 110 public function getMetaDataScheme() 111 { 112 // Fixed attribute 113 return 'LOM v 1.0'; 114 } 115 public function setLanguage(&$lng_obj) 116 { 117 if (is_object($lng_obj)) { 118 $this->language = $lng_obj; 119 } 120 } 121 public function &getLanguage() 122 { 123 return is_object($this->language) ? $this->language : false; 124 } 125 public function getLanguageCode() 126 { 127 return is_object($this->language) ? $this->language->getLanguageCode() : false; 128 } 129 130 131 public function save() 132 { 133 global $DIC; 134 135 $ilDB = $DIC['ilDB']; 136 137 $fields = $this->__getFields(); 138 $fields['meta_meta_data_id'] = array('integer',$next_id = $ilDB->nextId('il_meta_meta_data')); 139 140 if ($this->db->insert('il_meta_meta_data', $fields)) { 141 $this->setMetaId($next_id); 142 return $this->getMetaId(); 143 } 144 return false; 145 } 146 147 public function update() 148 { 149 global $DIC; 150 151 $ilDB = $DIC['ilDB']; 152 153 if ($this->getMetaId()) { 154 if ($this->db->update( 155 'il_meta_meta_data', 156 $this->__getFields(), 157 array("meta_meta_data_id" => array('integer',$this->getMetaId())) 158 )) { 159 return true; 160 } 161 } 162 return false; 163 } 164 165 public function delete() 166 { 167 global $DIC; 168 169 $ilDB = $DIC['ilDB']; 170 171 if ($this->getMetaId()) { 172 $query = "DELETE FROM il_meta_meta_data " . 173 "WHERE meta_meta_data_id = " . $ilDB->quote($this->getMetaId(), 'integer'); 174 $res = $ilDB->manipulate($query); 175 176 177 foreach ($this->getIdentifierIds() as $id) { 178 $ide = $this->getIdentifier($id); 179 $ide->delete(); 180 } 181 182 foreach ($this->getContributeIds() as $id) { 183 $con = $this->getContribute($id); 184 $con->delete(); 185 } 186 return true; 187 } 188 189 return false; 190 } 191 192 193 public function __getFields() 194 { 195 return array('rbac_id' => array('integer',$this->getRBACId()), 196 'obj_id' => array('integer',$this->getObjId()), 197 'obj_type' => array('text',$this->getObjType()), 198 'meta_data_scheme' => array('text',$this->getMetaDataScheme()), 199 'language' => array('text',$this->getLanguageCode())); 200 } 201 202 public function read() 203 { 204 global $DIC; 205 206 $ilDB = $DIC['ilDB']; 207 208 include_once 'Services/MetaData/classes/class.ilMDLanguageItem.php'; 209 210 211 if ($this->getMetaId()) { 212 $query = "SELECT * FROM il_meta_meta_data " . 213 "WHERE meta_meta_data_id = " . $ilDB->quote($this->getMetaId(), 'integer'); 214 215 216 $res = $this->db->query($query); 217 while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) { 218 $this->setRBACId($row->rbac_id); 219 $this->setObjId($row->obj_id); 220 $this->setObjType($row->obj_type); 221 $this->setMetaDataScheme($row->meta_data_scheme); 222 $this->setLanguage(new ilMDLanguageItem($row->language)); 223 } 224 return true; 225 } 226 return false; 227 } 228 229 /* 230 * XML Export of all meta data 231 * @param object (xml writer) see class.ilMD2XML.php 232 * 233 */ 234 public function toXML(&$writer) 235 { 236 if ($this->getMetaDataScheme()) { 237 $attr['MetadataScheme'] = $this->getMetaDataScheme(); 238 } 239 if ($this->getLanguageCode()) { 240 $attr['Language'] = $this->getLanguageCode(); 241 } 242 $writer->xmlStartTag('Meta-Metadata', $attr ? $attr : null); 243 244 // ELEMENT IDENTIFIER 245 $identifiers = $this->getIdentifierIds(); 246 foreach ($identifiers as $id) { 247 $ide = &$this->getIdentifier($id); 248 $ide->toXML($writer); 249 } 250 if (!count($identifiers)) { 251 include_once 'Services/Metadata/classes/class.ilMDIdentifier.php'; 252 $ide = new ilMDIdentifier($this->getRBACId(), $this->getObjId()); 253 $ide->toXML($writer); 254 } 255 256 // ELEMETN Contribute 257 $contributes = $this->getContributeIds(); 258 foreach ($contributes as $id) { 259 $con = &$this->getContribute($id); 260 $con->toXML($writer); 261 } 262 if (!count($contributes)) { 263 include_once 'Services/MetaData/classes/class.ilMDContribute.php'; 264 $con = new ilMDContribute($this->getRBACId(), $this->getObjId()); 265 $con->toXML($writer); 266 } 267 268 $writer->xmlEndTag('Meta-Metadata'); 269 } 270 271 // STATIC 272 public static function _getId($a_rbac_id, $a_obj_id) 273 { 274 global $DIC; 275 276 $ilDB = $DIC['ilDB']; 277 278 $query = "SELECT meta_meta_data_id FROM il_meta_meta_data " . 279 "WHERE rbac_id = " . $ilDB->quote($a_rbac_id, 'integer') . " " . 280 "AND obj_id = " . $ilDB->quote($a_obj_id, 'integer'); 281 282 $res = $ilDB->query($query); 283 while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) { 284 return $row->meta_meta_data_id; 285 } 286 return false; 287 } 288} 289