DatabaseTree::visualise() - Code Metrics - Inspection of "Update README.md" - gamernetwork/yolk-database - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — develop ( d28428...d28428 )

by Simon

created 2016-05-11 09:13 UTC

DatabaseTree::visualise() A

↳ Parent: DatabaseTree

Complexity

Conditions	3
Paths	2

Size

Total Lines	19
Code Lines	9

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	1

Metric	Value
c	1
b	0
f	1
dl	0
loc	19
rs	9.4285
cc	3
eloc	9
nc	2
nop	3

<?php
/*
 * This file is part of Yolk - Gamer Network's PHP Framework.
 *
 * Copyright (c) 2013 Gamer Network Ltd.
 *
 * Distributed under the MIT License, a copy of which is available in the
 * LICENSE file that was bundled with this package, or online at:
 * https://github.com/gamernetwork/yolk
 */

namespace yolk\database\support;

use yolk\contracts\database\DatabaseConnection;
use yolk\contracts\support\Tree;

// only manipulates tree fields (lft, rgt), doesn't insert or delete database records
class DatabaseTree implements Tree {

	protected $db;

	protected $table_name;
	protected $name_field;

	public function __construct( DatabaseConnection $db, $table_name, $name_field = 'name' ) {
		$this->db         = $db;
		$this->table_name = $table_name;
		$this->name_field = $name_field;
	}

	public function countAncestors( $id ) {

		$node = $this->findNodeById($id);

		return $node ? (int) $this->db->getOne(
			"SELECT COUNT(*)
			  FROM {$this->table_name}
			 WHERE lft < :lft
			   AND rgt > :rgt",
			$node
		) : 0;

	}

	public function getAncestors( $id ) {

		$node = $this->findNodeById($id);

		return $node ? $this->db->getAssoc(
			"SELECT id, {$this->name_field}
			   FROM {$this->table_name}
			  WHERE lft < :lft
			    AND rgt > :rgt
		   ORDER BY lft ASC",
			$node
		) : array();

	}

	public function countSiblings( $id ) {
		return (int) $this->db->getOne("SELECT COUNT(*) FROM {$this->table_name} WHERE parent_id = (SELECT parent_id FROM {$this->table_name} WHERE id = ?)", $id) - 1;
	}

	public function getSiblings( $id ) {
		$siblings = $this->db->getAssoc("SELECT id, {$this->name_field} FROM {$this->table_name} WHERE parent_id = (SELECT parent_id FROM {$this->table_name} WHERE id = ?)", $id);
		asort($siblings);
		return $siblings;
	}

	public function countChildren( $id ) {
		return (int) $this->db->getOne("SELECT COUNT(*) FROM {$this->table_name} WHERE parent_id = ", $id);
	}

	public function getChildren( $id ) {
		$children = $this->db->getAssoc("SELECT id, {$this->name_field} FROM {$this->table_name} WHERE parent_id = ?", $id);
		asort($children);
		return $children;
	}

	public function countDescendants( $id ) {
		return (int) $this->db->getOne("SELECT (rgt - lft - 1) / 2 FROM {$this->table_name} WHERE id = ?", $id);
	}

	public function getDescendants( $id, $absolute_depth = false ) {

		$node = $this->findNodeById($id);

		if( !$node )

			return array();

		$descendants = $this->db->getAssoc(
			"SELECT id,
				   {$this->name_field},
				   lft,
				   rgt
			  FROM {$this->table_name}
			 WHERE lft BETWEEN :lft + 1 AND :rgt - 1
		  ORDER BY lft ASC",
			$node
		);

		$offset = $absolute_depth ? $this->countAncestors($id) : 0;

		$stack = array();
		foreach( $descendants as &$child ) {

			$child['lft'] = (int) $child['lft'];
			$child['rgt'] = (int) $child['rgt'];

			// if current left > right on top of stack we've gone down a level so pop the stack
			while( $stack && $child['lft'] > $stack[count($stack) - 1] )

				array_pop($stack);

			$child['depth'] = $offset + count($stack) + 1;

			// node has children so push current right value to stack
			if( $child['rgt'] - $child['lft'] > 1 )
				$stack[] = $child['rgt'];

			unset($child['lft']);
			unset($child['rgt']);

		}

		return $descendants;

	}

	public function insertNode( $id, $parent_id = 0 ) {

		// determine if a database transaction is currently active
		// if not we'll start one
		$transaction = $this->db->inTransaction();

		try {

			if( !$transaction )
				$this->db->begin();

			if( $parent_id ) {

				$parent = $this->findNodeById($parent_id);

				// shift everything up to make room for the new node
				$this->db->query("UPDATE {$this->table_name} SET rgt = rgt + 2 WHERE rgt >= ?", $parent['rgt']);
				$this->db->query("UPDATE {$this->table_name} SET lft = lft + 2 WHERE lft >= ?", $parent['rgt']);

				// single query - http://www.slideshare.net/billkarwin/models-for-hierarchical-data (slide 36)
				/*update table set
				lft = case when left >= parent_rgt then lft + 2 else lft end
				rgt = rgt + 2
				where rgt > parent_lft*/

			}
			else {
				$parent = array(
					'rgt' => $this->db->getOne("SELECT MAX(rgt) + 1 FROM {$this->table_name}")
				);
			}

			$this->db->execute(
				"UPDATE {$this->table_name} SET lft = ?, rgt = ? WHERE id = ?",
				array($parent['rgt'], $parent['rgt'] + 1, $id)
			);

			if( !$transaction )
				$this->db->commit();

		}
		catch( \Exception $e ) {
			if( !$transaction )
				$this->db->rollback();
			throw $e;
		}

		return $this;

	}

	public function removeNode( $id ) {

		if( !$node = $this->findNodeById($id) )
			return $this;

		// determine if a database transaction is currently active
		// if not we'll start one
		$transaction = $this->db->inTransaction();

		try {

			if( !$transaction )
				$this->db->begin();

			$diff = (int) $node['rgt'] - (int) $node['lft'] + 1;

			// remove the item from the tree by blanking the left and right indexes
			$this->db->execute("UPDATE {$this->table_name} SET lft = 0, rgt = 0 WHERE lft BETWEEN ? AND ?", array($node['lft'], $node['rgt']));
			
			$this->db->execute("UPDATE {$this->table_name} SET lft = lft - ? WHERE lft >= ?", array($diff, $node['lft']));
			$this->db->execute("UPDATE {$this->table_name} SET rgt = rgt - ? WHERE rgt >= ?", array($diff, $node['rgt']));

			if( !$transaction )
				$this->db->commit();

		}
		catch( \Exception $e ) {
			if( !$transaction )
				$this->db->rollback();
			throw $e;
		}

		return $this;

	}

	public function moveNode( $id, $parent_id ) {

		$node   = $this->findNodeById($id);
		$parent = $this->findNodeById($parent_id);

		// both source and parent must exist
		if( !$node || !$parent )

			return $this;

		// determine if a database transaction is currently active
		// if not we'll start one
		$transaction = $this->db->inTransaction();

		try {

			if( !$transaction )
				$this->db->begin();

			$diff = $node['rgt'] - $node['lft'] + 1;

			// remove the node and it's descendents from the tree whilst keeping it's structure, by converting the left and right values to negative numbers
			$this->db->execute(
				"UPDATE {$this->table_name} SET lft = -(lft - :lft + 1), rgt = -(rgt -:lft + 1) WHERE lft >= :lft AND rgt <= :rgt",
				array(
					'lft'  => $node['lft'],
					'rgt'  => $node['rgt']
				)
			);

			// collapse the gap we just created
			$this->db->execute("UPDATE {$this->table_name} SET lft = lft - ? WHERE lft > ?", array($diff, $node['lft']));
			$this->db->execute("UPDATE {$this->table_name} SET rgt = rgt - ? WHERE rgt > ?", array($diff, $node['rgt']));

			// refresh parent state
			$parent = $this->findNodeById($parent_id);

			// create new gap
			$this->db->execute("UPDATE {$this->table_name} SET lft = lft + ? WHERE lft > ?", array($diff, $parent['rgt']));
			$this->db->execute("UPDATE {$this->table_name} SET rgt = rgt + ? WHERE rgt >= ?", array($diff, $parent['rgt']));

			// refresh parent state
			$parent = $this->findNodeById($parent_id);

			// fill the gap with the original node, updating the left and right values
			$this->db->execute("UPDATE {$this->table_name} SET lft = ? - ? - lft - 1 WHERE lft < 0", array($parent['rgt'], $diff));
			$this->db->execute("UPDATE {$this->table_name} SET rgt = ? - ? - rgt - 1 WHERE rgt < 0", array($parent['rgt'], $diff));

			// ensure the correct parent is assigned - may have already by done by calling function
			$this->db->execute("UPDATE {$this->table_name} SET parent_id = ? WHERE id = ?", array($parent_id, $id));

			if( !$transaction )
				$this->db->commit();

		}
		catch( \Exception $e ) {
			if( !$transaction )
				$this->db->rollback();
			throw $e;
		}

		return $this;

	}

	public function getTree( $id, $max_depth = 0, $sort = false ) {

		$node = $this->findNodeById($id);

		if( !$node )

			return array();

		// fetch all the nodes in this sub-tree and calculate their depth
		$data = $this->db->getAssoc(
			"SELECT n.id, n.{$this->name_field}, COUNT(p.id) - 1 as depth
			   FROM {$this->table_name} AS n,
			        {$this->table_name} AS p
			  WHERE n.lft BETWEEN p.lft AND p.rgt
			    AND n.lft BETWEEN ? AND ?
		   GROUP BY n.id
		   ORDER BY n.lft",
			array(
				$node['lft'],
				$node['rgt']
			)
		);

		// as depth is relative to the requested node we need to take into account any ancestors
		$max_depth += $this->countAncestors($id);

		$tree = array();
		$path = array();
		$prev = 0;

		foreach( $data as $id => $item ) {

			// too deep - not interested
			if( $max_depth && ($item['depth'] > $max_depth) )
				continue;
			
			// back up a level so remove last too items
			if( $item['depth'] < $prev ) {
				$path = array_slice($path, 0, -2);
			}
			// same level so remove previous item
			elseif( $item['depth'] == $prev ) {
				array_pop($path);
			}

			$path[]       = $item['name'];
			$item['path'] = implode('.', $path);
			$tree[$id]    = $item;
			$prev         = $item['depth'];

		}

		if( $sort ) {
			uasort($tree, function( $a, $b ) {
				return strcmp($a['path'], $b['path']);
			});
		}

		return $tree;

	}

	public function visualise( $id, $max_depth = 0, $sort = false ) {

		$tree = array();
		$data = $this->getTree($id, $max_depth, $sort);

		if( $data ) {


			$offset = reset($data);
			$offset = (int) $offset['depth'];

			foreach( $data as $id => $item ) {
				$tree[$id] = str_repeat('|-- ', (int) $item['depth'] - $offset). $item['name'];
			}

		}

		return $tree;

	}

	public function rebuild( $sort = false ) {

		try {
			$this->db->begin();
			$this->db->execute("UPDATE {$this->table_name} SET lft = 0, rgt = 0");
			$this->rebuildNode($sort, 0);
			$this->db->commit();
		}
		catch( \Exception $e ) {
			$this->db->rollback();
			throw $e;
		}

		return $this;

	}

	protected function rebuildNode( $sort = false, $id = 0, $lft = 0 ) {

		$rgt = $lft + 1;

		$order_by = $sort ? "ORDER BY {$this->name_field} ASC" : '';

		// fetch a list of children of this node
		$nodes = $this->db->getCol("SELECT id FROM {$this->table_name} WHERE parent_id = ? {$order_by}", $id);

		foreach( $nodes as $child ) {
			$rgt = $this->rebuildNode($sort, $child, $rgt);
		}

		$this->db->execute("UPDATE {$this->table_name} SET lft = ?, rgt = ? WHERE id = ?", array($lft, $rgt, $id));

	    return $rgt + 1;

	}

	protected function findNodeById( $id ) {
		return $this->db->getRow("SELECT lft, rgt FROM {$this->table_name} WHERE id = ?", $id);
	}

}

// EOF

1			<?php
2			/*
3			* This file is part of Yolk - Gamer Network's PHP Framework.
4			*
5			* Copyright (c) 2013 Gamer Network Ltd.
6			*
7			* Distributed under the MIT License, a copy of which is available in the
8			* LICENSE file that was bundled with this package, or online at:
9			* https://github.com/gamernetwork/yolk
10			*/
11
12			namespace yolk\database\support;
13
14			use yolk\contracts\database\DatabaseConnection;
15			use yolk\contracts\support\Tree;
16
17			// only manipulates tree fields (lft, rgt), doesn't insert or delete database records
18			class DatabaseTree implements Tree {
19
20			protected $db;
21
22			protected $table_name;
23			protected $name_field;
24
25			public function __construct( DatabaseConnection $db, $table_name, $name_field = 'name' ) {
26			$this->db = $db;
27			$this->table_name = $table_name;
28			$this->name_field = $name_field;
29			}
30
31			public function countAncestors( $id ) {
32
33			$node = $this->findNodeById($id);
34
35			return $node ? (int) $this->db->getOne(
36			"SELECT COUNT(*)
37			FROM {$this->table_name}
38			WHERE lft < :lft
39			AND rgt > :rgt",
40			$node
41			) : 0;
42
43			}
44
45			public function getAncestors( $id ) {
46
47			$node = $this->findNodeById($id);
48
49			return $node ? $this->db->getAssoc(
50			"SELECT id, {$this->name_field}
51			FROM {$this->table_name}
52			WHERE lft < :lft
53			AND rgt > :rgt
54			ORDER BY lft ASC",
55			$node
56			) : array();
57
58			}
59
60			public function countSiblings( $id ) {
61			return (int) $this->db->getOne("SELECT COUNT(*) FROM {$this->table_name} WHERE parent_id = (SELECT parent_id FROM {$this->table_name} WHERE id = ?)", $id) - 1;
62			}
63
64			public function getSiblings( $id ) {
65			$siblings = $this->db->getAssoc("SELECT id, {$this->name_field} FROM {$this->table_name} WHERE parent_id = (SELECT parent_id FROM {$this->table_name} WHERE id = ?)", $id);
66			asort($siblings);
67			return $siblings;
68			}
69
70			public function countChildren( $id ) {
71			return (int) $this->db->getOne("SELECT COUNT(*) FROM {$this->table_name} WHERE parent_id = ", $id);
72			}
73
74			public function getChildren( $id ) {
75			$children = $this->db->getAssoc("SELECT id, {$this->name_field} FROM {$this->table_name} WHERE parent_id = ?", $id);
76			asort($children);
77			return $children;
78			}
79
80			public function countDescendants( $id ) {
81			return (int) $this->db->getOne("SELECT (rgt - lft - 1) / 2 FROM {$this->table_name} WHERE id = ?", $id);
82			}
83
84			public function getDescendants( $id, $absolute_depth = false ) {
85
86			$node = $this->findNodeById($id);
87
88			if( !$node )
			0 ignored issues – show Bug Best Practice introduced 2016-02-25 17:13 UTC by Report Bug Copy Issue Report The expression `$node` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
89			return array();
90
91			$descendants = $this->db->getAssoc(
92			"SELECT id,
93			{$this->name_field},
94			lft,
95			rgt
96			FROM {$this->table_name}
97			WHERE lft BETWEEN :lft + 1 AND :rgt - 1
98			ORDER BY lft ASC",
99			$node
100			);
101
102			$offset = $absolute_depth ? $this->countAncestors($id) : 0;
103
104			$stack = array();
105			foreach( $descendants as &$child ) {
106
107			$child['lft'] = (int) $child['lft'];
108			$child['rgt'] = (int) $child['rgt'];
109
110			// if current left > right on top of stack we've gone down a level so pop the stack
111			while( $stack && $child['lft'] > $stack[count($stack) - 1] )
			0 ignored issues – show Bug Best Practice introduced 2016-02-25 17:13 UTC by Report Bug Copy Issue Report The expression `$stack` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `! empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
112			array_pop($stack);
113
114			$child['depth'] = $offset + count($stack) + 1;
115
116			// node has children so push current right value to stack
117			if( $child['rgt'] - $child['lft'] > 1 )
118			$stack[] = $child['rgt'];
119
120			unset($child['lft']);
121			unset($child['rgt']);
122
123			}
124
125			return $descendants;
126
127			}
128
129			public function insertNode( $id, $parent_id = 0 ) {
130
131			// determine if a database transaction is currently active
132			// if not we'll start one
133			$transaction = $this->db->inTransaction();
134
135			try {
136
137			if( !$transaction )
138			$this->db->begin();
139
140			if( $parent_id ) {
141
142			$parent = $this->findNodeById($parent_id);
143
144			// shift everything up to make room for the new node
145			$this->db->query("UPDATE {$this->table_name} SET rgt = rgt + 2 WHERE rgt >= ?", $parent['rgt']);
146			$this->db->query("UPDATE {$this->table_name} SET lft = lft + 2 WHERE lft >= ?", $parent['rgt']);
147
148			// single query - http://www.slideshare.net/billkarwin/models-for-hierarchical-data (slide 36)
149			/*update table set
150			lft = case when left >= parent_rgt then lft + 2 else lft end
151			rgt = rgt + 2
152			where rgt > parent_lft*/
153
154			}
155			else {
156			$parent = array(
157			'rgt' => $this->db->getOne("SELECT MAX(rgt) + 1 FROM {$this->table_name}")
158			);
159			}
160
161			$this->db->execute(
162			"UPDATE {$this->table_name} SET lft = ?, rgt = ? WHERE id = ?",
163			array($parent['rgt'], $parent['rgt'] + 1, $id)
164			);
165
166			if( !$transaction )
167			$this->db->commit();
168
169			}
170			catch( \Exception $e ) {
171			if( !$transaction )
172			$this->db->rollback();
173			throw $e;
174			}
175
176			return $this;
177
178			}
179
180			public function removeNode( $id ) {
181
182			if( !$node = $this->findNodeById($id) )
183			return $this;
184
185			// determine if a database transaction is currently active
186			// if not we'll start one
187			$transaction = $this->db->inTransaction();
188
189			try {
190
191			if( !$transaction )
192			$this->db->begin();
193
194			$diff = (int) $node['rgt'] - (int) $node['lft'] + 1;
195
196			// remove the item from the tree by blanking the left and right indexes
197			$this->db->execute("UPDATE {$this->table_name} SET lft = 0, rgt = 0 WHERE lft BETWEEN ? AND ?", array($node['lft'], $node['rgt']));
198
199			$this->db->execute("UPDATE {$this->table_name} SET lft = lft - ? WHERE lft >= ?", array($diff, $node['lft']));
200			$this->db->execute("UPDATE {$this->table_name} SET rgt = rgt - ? WHERE rgt >= ?", array($diff, $node['rgt']));
201
202			if( !$transaction )
203			$this->db->commit();
204
205			}
206			catch( \Exception $e ) {
207			if( !$transaction )
208			$this->db->rollback();
209			throw $e;
210			}
211
212			return $this;
213
214			}
215
216			public function moveNode( $id, $parent_id ) {
217
218			$node = $this->findNodeById($id);
219			$parent = $this->findNodeById($parent_id);
220
221			// both source and parent must exist
222			if( !$node \|\| !$parent )
			0 ignored issues – show Bug Best Practice introduced 2016-02-25 17:13 UTC by Report Bug Copy Issue Report The expression `$node` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history... Bug Best Practice introduced 2016-02-25 17:13 UTC by Report Bug Copy Issue Report The expression `$parent` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
223			return $this;
224
225			// determine if a database transaction is currently active
226			// if not we'll start one
227			$transaction = $this->db->inTransaction();
228
229			try {
230
231			if( !$transaction )
232			$this->db->begin();
233
234			$diff = $node['rgt'] - $node['lft'] + 1;
235
236			// remove the node and it's descendents from the tree whilst keeping it's structure, by converting the left and right values to negative numbers
237			$this->db->execute(
238			"UPDATE {$this->table_name} SET lft = -(lft - :lft + 1), rgt = -(rgt -:lft + 1) WHERE lft >= :lft AND rgt <= :rgt",
239			array(
240			'lft' => $node['lft'],
241			'rgt' => $node['rgt']
242			)
243			);
244
245			// collapse the gap we just created
246			$this->db->execute("UPDATE {$this->table_name} SET lft = lft - ? WHERE lft > ?", array($diff, $node['lft']));
247			$this->db->execute("UPDATE {$this->table_name} SET rgt = rgt - ? WHERE rgt > ?", array($diff, $node['rgt']));
248
249			// refresh parent state
250			$parent = $this->findNodeById($parent_id);
251
252			// create new gap
253			$this->db->execute("UPDATE {$this->table_name} SET lft = lft + ? WHERE lft > ?", array($diff, $parent['rgt']));
254			$this->db->execute("UPDATE {$this->table_name} SET rgt = rgt + ? WHERE rgt >= ?", array($diff, $parent['rgt']));
255
256			// refresh parent state
257			$parent = $this->findNodeById($parent_id);
258
259			// fill the gap with the original node, updating the left and right values
260			$this->db->execute("UPDATE {$this->table_name} SET lft = ? - ? - lft - 1 WHERE lft < 0", array($parent['rgt'], $diff));
261			$this->db->execute("UPDATE {$this->table_name} SET rgt = ? - ? - rgt - 1 WHERE rgt < 0", array($parent['rgt'], $diff));
262
263			// ensure the correct parent is assigned - may have already by done by calling function
264			$this->db->execute("UPDATE {$this->table_name} SET parent_id = ? WHERE id = ?", array($parent_id, $id));
265
266			if( !$transaction )
267			$this->db->commit();
268
269			}
270			catch( \Exception $e ) {
271			if( !$transaction )
272			$this->db->rollback();
273			throw $e;
274			}
275
276			return $this;
277
278			}
279
280			public function getTree( $id, $max_depth = 0, $sort = false ) {
281
282			$node = $this->findNodeById($id);
283
284			if( !$node )
			0 ignored issues – show Bug Best Practice introduced 2016-02-25 17:13 UTC by Report Bug Copy Issue Report The expression `$node` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
285			return array();
286
287			// fetch all the nodes in this sub-tree and calculate their depth
288			$data = $this->db->getAssoc(
289			"SELECT n.id, n.{$this->name_field}, COUNT(p.id) - 1 as depth
290			FROM {$this->table_name} AS n,
291			{$this->table_name} AS p
292			WHERE n.lft BETWEEN p.lft AND p.rgt
293			AND n.lft BETWEEN ? AND ?
294			GROUP BY n.id
295			ORDER BY n.lft",
296			array(
297			$node['lft'],
298			$node['rgt']
299			)
300			);
301
302			// as depth is relative to the requested node we need to take into account any ancestors
303			$max_depth += $this->countAncestors($id);
304
305			$tree = array();
306			$path = array();
307			$prev = 0;
308
309			foreach( $data as $id => $item ) {
310
311			// too deep - not interested
312			if( $max_depth && ($item['depth'] > $max_depth) )
313			continue;
314
315			// back up a level so remove last too items
316			if( $item['depth'] < $prev ) {
317			$path = array_slice($path, 0, -2);
318			}
319			// same level so remove previous item
320			elseif( $item['depth'] == $prev ) {
321			array_pop($path);
322			}
323
324			$path[] = $item['name'];
325			$item['path'] = implode('.', $path);
326			$tree[$id] = $item;
327			$prev = $item['depth'];
328
329			}
330
331			if( $sort ) {
332			uasort($tree, function( $a, $b ) {
333			return strcmp($a['path'], $b['path']);
334			});
335			}
336
337			return $tree;
338
339			}
340
341			public function visualise( $id, $max_depth = 0, $sort = false ) {
342
343			$tree = array();
344			$data = $this->getTree($id, $max_depth, $sort);
345
346			if( $data ) {
			0 ignored issues – show Bug Best Practice introduced 2016-02-25 17:13 UTC by Report Bug Copy Issue Report The expression `$data` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `! empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
347
348			$offset = reset($data);
349			$offset = (int) $offset['depth'];
350
351			foreach( $data as $id => $item ) {
352			$tree[$id] = str_repeat('\|-- ', (int) $item['depth'] - $offset). $item['name'];
353			}
354
355			}
356
357			return $tree;
358
359			}
360
361			public function rebuild( $sort = false ) {
362
363			try {
364			$this->db->begin();
365			$this->db->execute("UPDATE {$this->table_name} SET lft = 0, rgt = 0");
366			$this->rebuildNode($sort, 0);
367			$this->db->commit();
368			}
369			catch( \Exception $e ) {
370			$this->db->rollback();
371			throw $e;
372			}
373
374			return $this;
375
376			}
377
378			protected function rebuildNode( $sort = false, $id = 0, $lft = 0 ) {
379
380			$rgt = $lft + 1;
381
382			$order_by = $sort ? "ORDER BY {$this->name_field} ASC" : '';
383
384			// fetch a list of children of this node
385			$nodes = $this->db->getCol("SELECT id FROM {$this->table_name} WHERE parent_id = ? {$order_by}", $id);
386
387			foreach( $nodes as $child ) {
388			$rgt = $this->rebuildNode($sort, $child, $rgt);
389			}
390
391			$this->db->execute("UPDATE {$this->table_name} SET lft = ?, rgt = ? WHERE id = ?", array($lft, $rgt, $id));
392
393			return $rgt + 1;
394
395			}
396
397			protected function findNodeById( $id ) {
398			return $this->db->getRow("SELECT lft, rgt FROM {$this->table_name} WHERE id = ?", $id);
399			}
400
401			}
402
403			// EOF

gamernetwork / yolk-database

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DatabaseTree::visualise() A

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