| 1 | <?php |
| 2 | /* |
| 3 | * $Id: NestedSet.php 2963 2007-10-21 06:23:59Z Jonathan.Wage $ |
| 4 | * |
| 5 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 6 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 7 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 8 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 9 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 10 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 11 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 12 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 13 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 14 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 15 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 16 | * |
| 17 | * This software consists of voluntary contributions made by many individuals |
| 18 | * and is licensed under the LGPL. For more information, see |
| 19 | * <http://www.phpdoctrine.com>. |
| 20 | */ |
| 21 | |
| 22 | /** |
| 23 | * Doctrine_Tree_NestedSet |
| 24 | * |
| 25 | * @package Doctrine |
| 26 | * @subpackage Tree |
| 27 | * @license http://www.opensource.org/licenses/lgpl-license.php LGPL |
| 28 | * @link www.phpdoctrine.com |
| 29 | * @since 1.0 |
| 30 | * @version $Revision: 2963 $ |
| 31 | * @author Joe Simms <joe.simms@websites4.com> |
| 32 | */ |
| 33 | class Doctrine_Tree_NestedSet extends Doctrine_Tree implements Doctrine_Tree_Interface |
| 34 | { |
| 35 | private $_baseQuery; |
| 36 | private $_baseAlias = "base"; |
| 37 | |
| 38 | /** |
| 39 | * constructor, creates tree with reference to table and sets default root options |
| 40 | * |
| 41 | * @param object $table instance of Doctrine_Table |
| 42 | * @param array $options options |
| 43 | */ |
| 44 | public function __construct(Doctrine_Table $table, $options) |
| 45 | { |
| 46 | // set default many root attributes |
| 47 | $options['hasManyRoots'] = isset($options['hasManyRoots']) ? $options['hasManyRoots'] : false; |
| 48 | if ($options['hasManyRoots']) |
| 49 | $options['rootColumnName'] = isset($options['rootColumnName']) ? $options['rootColumnName'] : 'root_id'; |
| 50 | |
| 51 | parent::__construct($table, $options); |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * used to define table attributes required for the NestetSet implementation |
| 56 | * adds lft and rgt columns for corresponding left and right values |
| 57 | * |
| 58 | */ |
| 59 | public function setTableDefinition() |
| 60 | { |
| 61 | if ($root = $this->getAttribute('rootColumnName')) { |
| 62 | $this->table->setColumn($root, 'integer', 4); |
| 63 | } |
| 64 | |
| 65 | $this->table->setColumn('lft', 'integer', 4); |
| 66 | $this->table->setColumn('rgt', 'integer', 4); |
| 67 | $this->table->setColumn('level', 'integer', 2); |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * creates root node from given record or from a new record |
| 72 | * |
| 73 | * @param object $record instance of Doctrine_Record |
| 74 | */ |
| 75 | public function createRoot(Doctrine_Record $record = null) |
| 76 | { |
| 77 | if ( ! $record) { |
| 78 | $record = $this->table->create(); |
| 79 | } |
| 80 | |
| 81 | // if tree is many roots, and no root id has been set, then get next root id |
| 82 | if ($root = $this->getAttribute('hasManyRoots') && $record->getNode()->getRootValue() <= 0) { |
| 83 | $record->getNode()->setRootValue($this->getNextRootId()); |
| 84 | } |
| 85 | |
| 86 | $record->set('lft', '1'); |
| 87 | $record->set('rgt', '2'); |
| 88 | $record->set('level', 0); |
| 89 | |
| 90 | $record->save(); |
| 91 | |
| 92 | return $record; |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * returns root node |
| 97 | * |
| 98 | * @return object $record instance of Doctrine_Record |
| 99 | * @deprecated Use fetchRoot() |
| 100 | */ |
| 101 | public function findRoot($rootId = 1) |
| 102 | { |
| 103 | return $this->fetchRoot($rootId); |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * Fetches a/the root node. |
| 108 | * |
| 109 | * @param integer $rootId |
| 110 | */ |
| 111 | public function fetchRoot($rootId = 1) |
| 112 | { |
| 113 | $q = $this->getBaseQuery(); |
| 114 | $q = $q->addWhere($this->_baseAlias . '.lft = ?', 1); |
| 115 | |
| 116 | // if tree has many roots, then specify root id |
| 117 | $q = $this->returnQueryWithRootId($q, $rootId); |
| 118 | $data = $q->execute(); |
| 119 | |
| 120 | if (count($data) <= 0) { |
| 121 | return false; |
| 122 | } |
| 123 | |
| 124 | if ($data instanceof Doctrine_Collection) { |
| 125 | $root = $data->getFirst(); |
| 126 | $root['level'] = 0; |
| 127 | } else if (is_array($data)) { |
| 128 | $root = array_shift($data); |
| 129 | $root['level'] = 0; |
| 130 | } else { |
| 131 | throw new Doctrine_Tree_Exception("Unexpected data structure returned."); |
| 132 | } |
| 133 | |
| 134 | return $root; |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * Fetches a tree. |
| 139 | * |
| 140 | * @param array $options Options |
| 141 | * @return mixed The tree or FALSE if the tree could not be found. |
| 142 | */ |
| 143 | public function fetchTree($options = array()) |
| 144 | { |
| 145 | // fetch tree |
| 146 | $q = $this->getBaseQuery(); |
| 147 | |
| 148 | $q = $q->addWhere($this->_baseAlias . ".lft >= ?", 1); |
| 149 | |
| 150 | // if tree has many roots, then specify root id |
| 151 | $rootId = isset($options['root_id']) ? $options['root_id'] : '1'; |
| 152 | if (is_array($rootId)) { |
| 153 | $q->addOrderBy($this->_baseAlias . "." . $this->getAttribute('rootColumnName') . |
| 154 | ", " . $this->_baseAlias . ".lft ASC"); |
| 155 | } else { |
| 156 | $q->addOrderBy($this->_baseAlias . ".lft ASC"); |
| 157 | } |
| 158 | |
| 159 | $q = $this->returnQueryWithRootId($q, $rootId); |
| 160 | $tree = $q->execute(); |
| 161 | |
| 162 | if (count($tree) <= 0) { |
| 163 | return false; |
| 164 | } |
| 165 | |
| 166 | return $tree; |
| 167 | } |
| 168 | |
| 169 | /** |
| 170 | * Fetches a branch of a tree. |
| 171 | * |
| 172 | * @param mixed $pk primary key as used by table::find() to locate node to traverse tree from |
| 173 | * @param array $options Options. |
| 174 | * @return mixed The branch or FALSE if the branch could not be found. |
| 175 | * @todo Only fetch the lft and rgt values of the initial record. more is not needed. |
| 176 | */ |
| 177 | public function fetchBranch($pk, $options = array()) |
| 178 | { |
| 179 | $record = $this->table->find($pk); |
| 180 | if ( ! ($record instanceof Doctrine_Record) || !$record->exists()) { |
| 181 | // TODO: if record doesn't exist, throw exception or similar? |
| 182 | return false; |
| 183 | } |
| 184 | //$depth = isset($options['depth']) ? $options['depth'] : null; |
| 185 | |
| 186 | $q = $this->getBaseQuery(); |
| 187 | $params = array($record->get('lft'), $record->get('rgt')); |
| 188 | $q->addWhere($this->_baseAlias . ".lft >= ? AND " . $this->_baseAlias . ".rgt <= ?", $params) |
| 189 | ->addOrderBy($this->_baseAlias . ".lft asc"); |
| 190 | $q = $this->returnQueryWithRootId($q, $record->getNode()->getRootValue()); |
| 191 | return $q->execute(); |
| 192 | } |
| 193 | |
| 194 | /** |
| 195 | * Fetches all root nodes. If the tree has only one root this is the same as |
| 196 | * fetchRoot(). |
| 197 | * |
| 198 | * @return mixed The root nodes. |
| 199 | */ |
| 200 | public function fetchRoots() |
| 201 | { |
| 202 | $q = $this->getBaseQuery(); |
| 203 | $q = $q->addWhere($this->_baseAlias . '.lft = ?', 1); |
| 204 | return $q->execute(); |
| 205 | } |
| 206 | |
| 207 | /** |
| 208 | * calculates the next available root id |
| 209 | * |
| 210 | * @return integer |
| 211 | */ |
| 212 | public function getNextRootId() |
| 213 | { |
| 214 | return $this->getMaxRootId() + 1; |
| 215 | } |
| 216 | |
| 217 | /** |
| 218 | * calculates the current max root id |
| 219 | * |
| 220 | * @return integer |
| 221 | */ |
| 222 | public function getMaxRootId() |
| 223 | { |
| 224 | $component = $this->table->getComponentName(); |
| 225 | $column = $this->getAttribute('rootColumnName'); |
| 226 | |
| 227 | // cannot get this dql to work, cannot retrieve result using $coll[0]->max |
| 228 | //$dql = "SELECT MAX(c.$column) FROM $component c"; |
| 229 | |
| 230 | $dql = 'SELECT c.' . $column . ' FROM ' . $component . ' c ORDER BY c.' . $column . ' DESC LIMIT 1'; |
| 231 | |
| 232 | $coll = $this->table->getConnection()->query($dql); |
| 233 | |
| 234 | $max = $coll[0]->get($column); |
| 235 | |
| 236 | $max = !is_null($max) ? $max : 0; |
| 237 | |
| 238 | return $max; |
| 239 | } |
| 240 | |
| 241 | /** |
| 242 | * returns parsed query with root id where clause added if applicable |
| 243 | * |
| 244 | * @param object $query Doctrine_Query |
| 245 | * @param integer $root_id id of destination root |
| 246 | * @return object Doctrine_Query |
| 247 | */ |
| 248 | public function returnQueryWithRootId($query, $rootId = 1) |
| 249 | { |
| 250 | if ($root = $this->getAttribute('rootColumnName')) { |
| 251 | if (is_array($rootId)) { |
| 252 | $query->addWhere($root . ' IN (' . implode(',', array_fill(0, count($rootId), '?')) . ')', |
| 253 | $rootId); |
| 254 | } else { |
| 255 | $query->addWhere($root . ' = ?', $rootId); |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | return $query; |
| 260 | } |
| 261 | |
| 262 | /** |
| 263 | * Enter description here... |
| 264 | * |
| 265 | * @param array $options |
| 266 | * @return unknown |
| 267 | */ |
| 268 | public function getBaseQuery() |
| 269 | { |
| 270 | if ( ! isset($this->_baseQuery)) { |
| 271 | $this->_baseQuery = $this->_createBaseQuery(); |
| 272 | } |
| 273 | return $this->_baseQuery->copy(); |
| 274 | } |
| 275 | |
| 276 | /** |
| 277 | * Enter description here... |
| 278 | * |
| 279 | */ |
| 280 | public function getBaseAlias() |
| 281 | { |
| 282 | return $this->_baseAlias; |
| 283 | } |
| 284 | |
| 285 | /** |
| 286 | * Enter description here... |
| 287 | * |
| 288 | */ |
| 289 | private function _createBaseQuery() |
| 290 | { |
| 291 | $this->_baseAlias = "base"; |
| 292 | $q = new Doctrine_Query(); |
| 293 | $q->select($this->_baseAlias . ".*")->from($this->getBaseComponent() . " " . $this->_baseAlias); |
| 294 | return $q; |
| 295 | } |
| 296 | |
| 297 | /** |
| 298 | * Enter description here... |
| 299 | * |
| 300 | * @param Doctrine_Query $query |
| 301 | */ |
| 302 | public function setBaseQuery(Doctrine_Query $query) |
| 303 | { |
| 304 | $this->_baseAlias = $query->getRootAlias(); |
| 305 | $query->addSelect($this->_baseAlias . ".lft, " . $this->_baseAlias . ".rgt, ". $this->_baseAlias . ".level"); |
| 306 | if ($this->getAttribute('rootColumnName')) { |
| 307 | $query->addSelect($this->_baseAlias . "." . $this->getAttribute('rootColumnName')); |
| 308 | } |
| 309 | $this->_baseQuery = $query; |
| 310 | } |
| 311 | |
| 312 | /** |
| 313 | * Enter description here... |
| 314 | * |
| 315 | */ |
| 316 | public function resetBaseQuery() |
| 317 | { |
| 318 | $this->_baseQuery = null; |
| 319 | } |
| 320 | |
| 321 | /** |
| 322 | * Enter description here... |
| 323 | * |
| 324 | * @param unknown_type $graph |
| 325 | */ |
| 326 | /* |
| 327 | public function computeLevels($tree) |
| 328 | { |
| 329 | $right = array(); |
| 330 | $isArray = is_array($tree); |
| 331 | $rootColumnName = $this->getAttribute('rootColumnName'); |
| 332 | |
| 333 | for ($i = 0, $count = count($tree); $i < $count; $i++) { |
| 334 | if ($rootColumnName && $i > 0 && $tree[$i][$rootColumnName] != $tree[$i-1][$rootColumnName]) { |
| 335 | $right = array(); |
| 336 | } |
| 337 | |
| 338 | if (count($right) > 0) { |
| 339 | while (count($right) > 0 && $right[count($right)-1] < $tree[$i]['rgt']) { |
| 340 | //echo count($right); |
| 341 | array_pop($right); |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | if ($isArray) { |
| 346 | $tree[$i]['level'] = count($right); |
| 347 | } else { |
| 348 | $tree[$i]->getNode()->setLevel(count($right)); |
| 349 | } |
| 350 | |
| 351 | $right[] = $tree[$i]['rgt']; |
| 352 | } |
| 353 | return $tree; |
| 354 | } |
| 355 | */ |
| 356 | } |