Graph::__get() - Code Metrics - phpDocumentor/GraphViz - Measure and Improve Code Quality continuously with Scrutinizer

Graph::__get() A
last analyzed 2021-02-02 21:12 UTC

↳ Parent: Graph

Complexity

Conditions	1
Paths	1

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	1
CRAP Score	1

Importance

Changes

Metric	Value
dl	0
loc	4
ccs	1
cts	1
cp	1
rs	10
c	0
b	0
f	0
cc	1
nc	1
nop	1
crap	1

<?php

declare(strict_types=1);

/**
 * phpDocumentor
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @link      http://phpdoc.org
 */

namespace phpDocumentor\GraphViz;

use InvalidArgumentException;
use function array_merge;
use function escapeshellarg;
use function exec;
use function file_put_contents;
use function implode;
use function in_array;
use function realpath;
use function strtolower;
use function substr;
use function sys_get_temp_dir;
use function tempnam;
use function unlink;
use const DIRECTORY_SEPARATOR;
use const PHP_EOL;

/**
 * Class representing a graph; this may be a main graph but also a subgraph.
 *
 * In case of a subgraph:
 * When the name of the subgraph is prefixed with _cluster_ then the contents
 * of this graph will be grouped and a border will be added. Otherwise it is
 * used as logical container to place defaults in.
 *
 * @method Graph setRankSep(string $rankSep)
 * @method Graph setCenter(string $center)
 * @method Graph setRank(string $rank)
 * @method Graph setRankDir(string $rankDir)
 * @method Graph setSplines(string $splines)
 * @method Graph setConcentrate(string $concentrate)
 */
class Graph
{
    use Attributes;

    /** @var string Name of this graph */
    protected $name = 'G';

    /** @var string Type of this graph; may be digraph, graph or subgraph */
    protected $type = 'digraph';

    /** @var bool If the graph is strict then multiple edges are not allowed between the same pairs of nodes */
    protected $strict = false;

    /** @var Graph[] A list of subgraphs for this Graph */
    protected $graphs = [];

    /** @var Node[] A list of nodes for this Graph */
    protected $nodes = [];

    /** @var Edge[] A list of edges / arrows for this Graph */
    protected $edges = [];

    /** @var string The path to execute dot from */
    protected $path = '';

    /**
     * Factory method to instantiate a Graph so that you can use fluent coding
     * to chain everything.
     *
     * @param string $name        The name for this graph.
     * @param bool   $directional Whether this is a directed or undirected graph.
     *
     * @return Graph
     */
    public static function create(string $name = 'G', bool $directional = true) : self
    {
        $graph = new self();
        $graph
            ->setName($name)
            ->setType($directional ? 'digraph' : 'graph');

        return $graph;
    }

    /**
     * Sets the path for the execution. Only needed if it is not in the PATH env.
     *
     * @param string $path The path to execute dot from
     */
    public function setPath(string $path) : self
    {
        $realpath = realpath($path);
        if ($path && $path === $realpath) {
            $this->path = $path . DIRECTORY_SEPARATOR;
        }

        return $this;
    }

    /**
     * Sets the name for this graph.
     *
     * If this is a subgraph you can prefix the name with _cluster_ to group all
     * contained nodes and add a border.
     *
     * @param string $name The new name for this graph.
     */
    public function setName(string $name) : self
    {
        $this->name = $name;

        return $this;
    }

    /**
     * Returns the name for this Graph.
     */
    public function getName() : string
    {
        return $this->name;
    }

    /**
     * Sets the type for this graph.
     *
     * @param string $type Must be either "digraph", "graph" or "subgraph".
     *
     * @throws InvalidArgumentException If $type is not "digraph", "graph" or
     * "subgraph".
     */
    public function setType(string $type) : self
    {
        if (!in_array($type, ['digraph', 'graph', 'subgraph'], true)) {
            throw new InvalidArgumentException(
                'The type for a graph must be either "digraph", "graph" or '
                . '"subgraph"'
            );
        }

        $this->type = $type;

        return $this;
    }

    /**
     * Returns the type of this Graph.
     */
    public function getType() : string
    {
        return $this->type;
    }

    /**
     * Set if the Graph should be strict. If the graph is strict then
     * multiple edges are not allowed between the same pairs of nodes
     */
    public function setStrict(bool $isStrict) : self
    {
        $this->strict = $isStrict;

        return $this;
    }

    public function isStrict() : bool
    {
        return $this->strict;
    }

    /**
     * Magic method to provide a getter/setter to add attributes on the Graph.
     *
     * Using this method we make sure that we support any attribute without
     * too much hassle. If the name for this method does not start with get
     * or set we return null.
     *
     * Set methods return this graph (fluent interface) whilst get methods
     * return the attribute value.
     *
     * @param string  $name      Name of the method including get/set
     * @param mixed[] $arguments The arguments, should be 1: the value
     *
     * @return Attribute|Graph|null
     *
     * @throws AttributeNotFound
     */
    public function __call(string $name, array $arguments)
    {
        $key = strtolower(substr($name, 3));
        if (strtolower(substr($name, 0, 3)) === 'set') {
            return $this->setAttribute($key, (string) $arguments[0]);
        }

        if (strtolower(substr($name, 0, 3)) === 'get') {
            return $this->getAttribute($key);
        }

        return null;
    }

    /**
     * Adds a subgraph to this graph; automatically changes the type to subgraph.
     *
     * Please note that an index is maintained using the name of the subgraph.
     * Thus if you have 2 subgraphs with the same name that the first will be
     * overwritten by the latter.
     *
     * @see Graph::create()
     *
     * @param Graph $graph The graph to add onto this graph as
     * subgraph.
     */
    public function addGraph(self $graph) : self
    {
        $graph->setType('subgraph');
        $this->graphs[$graph->getName()] = $graph;

        return $this;
    }

    /**
     * Checks whether a graph with a certain name already exists.
     *
     * @param string $name Name of the graph to find.
     */
    public function hasGraph(string $name) : bool
    {
        return isset($this->graphs[$name]);
    }

    /**
     * Returns the subgraph with a given name.
     *
     * @param string $name Name of the requested graph.
     */
    public function getGraph(string $name) : self
    {
        return $this->graphs[$name];
    }

    /**
     * Sets a node in the $nodes array; uses the name of the node as index.
     *
     * Nodes can be retrieved by retrieving the property with the same name.
     * Thus 'node1' can be retrieved by invoking: $graph->node1
     *
     * @see Node::create()
     *
     * @param Node $node The node to set onto this Graph.
     */
    public function setNode(Node $node) : self
    {
        $this->nodes[$node->getName()] = $node;

        return $this;
    }

    /**
     * Finds a node in this graph or any of its subgraphs.
     *
     * @param string $name Name of the node to find.
     */
    public function findNode(string $name) : ?Node
    {
        if (isset($this->nodes[$name])) {
            return $this->nodes[$name];
        }

        foreach ($this->graphs as $graph) {
            $node = $graph->findNode($name);
            if ($node) {
                return $node;
            }
        }

        return null;
    }

    /**
     * Sets a node using a custom name.
     *
     * @see Graph::setNode()
     *
     * @param string $name  Name of the node.
     * @param Node   $value Node to set on the given name.
     */
    public function __set(string $name, Node $value) : void
    {
        $this->nodes[$name] = $value;
    }

    /**
     * Returns the requested node by its name.
     *
     * @see Graph::setNode()
     *
     * @param string $name The name of the node to retrieve.
     */
    public function __get(string $name) : ?Node
    {
        return $this->nodes[$name] ?? null;
    }

    /**
     * Links two nodes to eachother and registers the Edge onto this graph.
     *
     * @see Edge::create()
     *
     * @param Edge $edge The link between two classes.
     */
    public function link(Edge $edge) : self
    {
        $this->edges[] = $edge;

        return $this;
    }

    /**
     * Exports this graph to a generated image.
     *
     * This is the only method that actually requires GraphViz.
     *
     * @link http://www.graphviz.org/content/output-formats
     * @uses GraphViz/dot
     *
     * @param string $type     The type to export to; see the link above for a
     *     list of supported types.
     * @param string $filename The path to write to.
     *
     * @throws Exception If an error occurred in GraphViz.
     */
    public function export(string $type, string $filename) : self
    {
        $type     = escapeshellarg($type);
        $filename = escapeshellarg($filename);

        // write the dot file to a temporary file
        $tmpfile = (string) tempnam(sys_get_temp_dir(), 'gvz');
        file_put_contents($tmpfile, (string) $this);

        // escape the temp file for use as argument
        $tmpfileArg = escapeshellarg($tmpfile);

        // create the dot output
        $output = [];
        $code   = 0;
        exec($this->path . "dot -T${type} -o${filename} < ${tmpfileArg} 2>&1", $output, $code);
        unlink($tmpfile);

        if ($code !== 0) {
            throw new Exception(
                'An error occurred while creating the graph; GraphViz returned: '
                . implode(PHP_EOL, $output)
            );
        }

        return $this;
    }

    /**
     * Generates a DOT file for use with GraphViz.
     *
     * GraphViz is not used in this method; it is safe to call it even without
     * GraphViz installed.
     */
    public function __toString() : string
    {
        $elements = array_merge(
            $this->graphs,
            $this->attributes,
            $this->edges,
            $this->nodes
        );

        $attributes = [];
        foreach ($elements as $value) {
            $attributes[] = (string) $value;
        }

        $attributes = implode(PHP_EOL, $attributes);

        $strict = ($this->isStrict() ? 'strict ' : '');

        return <<<DOT
{$strict}{$this->getType()} "{$this->getName()}" {
${attributes}
}
DOT;
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		/**
6		* phpDocumentor
7		*
8		* For the full copyright and license information, please view the LICENSE
9		* file that was distributed with this source code.
10		*
11		* @link http://phpdoc.org
12		*/
13
14		namespace phpDocumentor\GraphViz;
15
16		use InvalidArgumentException;
17		use function array_merge;
18		use function escapeshellarg;
19		use function exec;
20		use function file_put_contents;
21		use function implode;
22		use function in_array;
23		use function realpath;
24		use function strtolower;
25		use function substr;
26		use function sys_get_temp_dir;
27		use function tempnam;
28		use function unlink;
29		use const DIRECTORY_SEPARATOR;
30		use const PHP_EOL;
31
32		/**
33		* Class representing a graph; this may be a main graph but also a subgraph.
34		*
35		* In case of a subgraph:
36		* When the name of the subgraph is prefixed with _cluster_ then the contents
37		* of this graph will be grouped and a border will be added. Otherwise it is
38		* used as logical container to place defaults in.
39		*
40		* @method Graph setRankSep(string $rankSep)
41		* @method Graph setCenter(string $center)
42		* @method Graph setRank(string $rank)
43		* @method Graph setRankDir(string $rankDir)
44		* @method Graph setSplines(string $splines)
45		* @method Graph setConcentrate(string $concentrate)
46		*/
47		class Graph
48		{
49		use Attributes;
50
51		/** @var string Name of this graph */
52		protected $name = 'G';
53
54		/** @var string Type of this graph; may be digraph, graph or subgraph */
55		protected $type = 'digraph';
56
57		/** @var bool If the graph is strict then multiple edges are not allowed between the same pairs of nodes */
58		protected $strict = false;
59
60		/** @var Graph[] A list of subgraphs for this Graph */
61		protected $graphs = [];
62
63		/** @var Node[] A list of nodes for this Graph */
64		protected $nodes = [];
65
66		/** @var Edge[] A list of edges / arrows for this Graph */
67		protected $edges = [];
68
69		/** @var string The path to execute dot from */
70		protected $path = '';
71
72		/**
73		* Factory method to instantiate a Graph so that you can use fluent coding
74		* to chain everything.
75		*
76		* @param string $name The name for this graph.
77		* @param bool $directional Whether this is a directed or undirected graph.
78		*
79		* @return Graph
80		*/
81	1	public static function create(string $name = 'G', bool $directional = true) : self
82		{
83	1	$graph = new self();
84		$graph
85	1	->setName($name)
86	1	->setType($directional ? 'digraph' : 'graph');
87
88	1	return $graph;
89		}
90
91		/**
92		* Sets the path for the execution. Only needed if it is not in the PATH env.
93		*
94		* @param string $path The path to execute dot from
95		*/
96	1	public function setPath(string $path) : self
97		{
98	1	$realpath = realpath($path);
99	1	if ($path && $path === $realpath) {
100	1	$this->path = $path . DIRECTORY_SEPARATOR;
101		}
102
103	1	return $this;
104		}
105
106		/**
107		* Sets the name for this graph.
108		*
109		* If this is a subgraph you can prefix the name with _cluster_ to group all
110		* contained nodes and add a border.
111		*
112		* @param string $name The new name for this graph.
113		*/
114	1	public function setName(string $name) : self
115		{
116	1	$this->name = $name;
117
118	1	return $this;
119		}
120
121		/**
122		* Returns the name for this Graph.
123		*/
124	1	public function getName() : string
125		{
126	1	return $this->name;
127		}
128
129		/**
130		* Sets the type for this graph.
131		*
132		* @param string $type Must be either "digraph", "graph" or "subgraph".
133		*
134		* @throws InvalidArgumentException If $type is not "digraph", "graph" or
135		* "subgraph".
136		*/
137	2	public function setType(string $type) : self
138		{
139	2	if (!in_array($type, ['digraph', 'graph', 'subgraph'], true)) {
140	1	throw new InvalidArgumentException(
141		'The type for a graph must be either "digraph", "graph" or '
142	1	. '"subgraph"'
143		);
144		}
145
146	1	$this->type = $type;
147
148	1	return $this;
149		}
150
151		/**
152		* Returns the type of this Graph.
153		*/
154	1	public function getType() : string
155		{
156	1	return $this->type;
157		}
158
159		/**
160		* Set if the Graph should be strict. If the graph is strict then
161		* multiple edges are not allowed between the same pairs of nodes
162		*/
163	2	public function setStrict(bool $isStrict) : self
164		{
165	2	$this->strict = $isStrict;
166
167	2	return $this;
168		}
169
170	1	public function isStrict() : bool
171		{
172	1	return $this->strict;
173		}
174
175		/**
176		* Magic method to provide a getter/setter to add attributes on the Graph.
177		*
178		* Using this method we make sure that we support any attribute without
179		* too much hassle. If the name for this method does not start with get
180		* or set we return null.
181		*
182		* Set methods return this graph (fluent interface) whilst get methods
183		* return the attribute value.
184		*
185		* @param string $name Name of the method including get/set
186		* @param mixed[] $arguments The arguments, should be 1: the value
187		*
188		* @return Attribute\|Graph\|null
189		*
190		* @throws AttributeNotFound
191		*/
192	1	public function __call(string $name, array $arguments)
193		{
194	1	$key = strtolower(substr($name, 3));
195	1	if (strtolower(substr($name, 0, 3)) === 'set') {
196	1	return $this->setAttribute($key, (string) $arguments[0]);
197		}
198
199	1	if (strtolower(substr($name, 0, 3)) === 'get') {
200	1	return $this->getAttribute($key);
201		}
202
203	1	return null;
204		}
205
206		/**
207		* Adds a subgraph to this graph; automatically changes the type to subgraph.
208		*
209		* Please note that an index is maintained using the name of the subgraph.
210		* Thus if you have 2 subgraphs with the same name that the first will be
211		* overwritten by the latter.
212		*
213		* @see Graph::create()
214		*
215		* @param Graph $graph The graph to add onto this graph as
216		* subgraph.
217		*/
218	1	public function addGraph(self $graph) : self
219		{
220	1	$graph->setType('subgraph');
221	1	$this->graphs[$graph->getName()] = $graph;
222
223	1	return $this;
224		}
225
226		/**
227		* Checks whether a graph with a certain name already exists.
228		*
229		* @param string $name Name of the graph to find.
230		*/
231	1	public function hasGraph(string $name) : bool
232		{
233	1	return isset($this->graphs[$name]);
234		}
235
236		/**
237		* Returns the subgraph with a given name.
238		*
239		* @param string $name Name of the requested graph.
240		*/
241	1	public function getGraph(string $name) : self
242		{
243	1	return $this->graphs[$name];
244		}
245
246		/**
247		* Sets a node in the $nodes array; uses the name of the node as index.
248		*
249		* Nodes can be retrieved by retrieving the property with the same name.
250		* Thus 'node1' can be retrieved by invoking: $graph->node1
251		*
252		* @see Node::create()
253		*
254		* @param Node $node The node to set onto this Graph.
255		*/
256	1	public function setNode(Node $node) : self
257		{
258	1	$this->nodes[$node->getName()] = $node;
259
260	1	return $this;
261		}
262
263		/**
264		* Finds a node in this graph or any of its subgraphs.
265		*
266		* @param string $name Name of the node to find.
267		*/
268	1	public function findNode(string $name) : ?Node
269		{
270	1	if (isset($this->nodes[$name])) {
271	1	return $this->nodes[$name];
272		}
273
274	1	foreach ($this->graphs as $graph) {
275	1	$node = $graph->findNode($name);
276	1	if ($node) {
277	1	return $node;
278		}
279		}
280
281	1	return null;
282		}
283
284		/**
285		* Sets a node using a custom name.
286		*
287		* @see Graph::setNode()
288		*
289		* @param string $name Name of the node.
290		* @param Node $value Node to set on the given name.
291		*/
292	1	public function __set(string $name, Node $value) : void
293		{
294	1	$this->nodes[$name] = $value;
295		}
296	1
297		/**
298		* Returns the requested node by its name.
299		*
300		* @see Graph::setNode()
301		*
302		* @param string $name The name of the node to retrieve.
303		*/
304		public function __get(string $name) : ?Node
305		{
306	1	return $this->nodes[$name] ?? null;
307		}
308	1
309		/**
310		* Links two nodes to eachother and registers the Edge onto this graph.
311		*
312		* @see Edge::create()
313		*
314		* @param Edge $edge The link between two classes.
315		*/
316		public function link(Edge $edge) : self
317		{
318	1	$this->edges[] = $edge;
319
320	1	return $this;
321		}
322	1
323		/**
324		* Exports this graph to a generated image.
325		*
326		* This is the only method that actually requires GraphViz.
327		*
328		* @link http://www.graphviz.org/content/output-formats
329		* @uses GraphViz/dot
330		*
331		* @param string $type The type to export to; see the link above for a
332		* list of supported types.
333		* @param string $filename The path to write to.
334		*
335		* @throws Exception If an error occurred in GraphViz.
336		*/
337		public function export(string $type, string $filename) : self
338		{
339	2	$type = escapeshellarg($type);
340		$filename = escapeshellarg($filename);
341	2
342	2	// write the dot file to a temporary file
343		$tmpfile = (string) tempnam(sys_get_temp_dir(), 'gvz');
344		file_put_contents($tmpfile, (string) $this);
345	2
346	2	// escape the temp file for use as argument
347		$tmpfileArg = escapeshellarg($tmpfile);
348
349	2	// create the dot output
350		$output = [];
351		$code = 0;
352	2	exec($this->path . "dot -T${type} -o${filename} < ${tmpfileArg} 2>&1", $output, $code);
353	2	unlink($tmpfile);
354	2
355	2	if ($code !== 0) {
356		throw new Exception(
357	2	'An error occurred while creating the graph; GraphViz returned: '
358	1	. implode(PHP_EOL, $output)
359		);
360	1	}
361
362		return $this;
363		}
364	1
365		/**
366		* Generates a DOT file for use with GraphViz.
367		*
368		* GraphViz is not used in this method; it is safe to call it even without
369		* GraphViz installed.
370		*/
371		public function __toString() : string
372		{
373	1	$elements = array_merge(
374		$this->graphs,
375	1	$this->attributes,
376	1	$this->edges,
377	1	$this->nodes
378	1	);
379	1
380		$attributes = [];
381		foreach ($elements as $value) {
382	1	$attributes[] = (string) $value;
383	1	}
384	1
385		$attributes = implode(PHP_EOL, $attributes);
386
387	1	$strict = ($this->isStrict() ? 'strict ' : '');
388
389	1	return <<<DOT
390		{$strict}{$this->getType()} "{$this->getName()}" {
391		${attributes}
392	1	}
393	1	DOT;
394		}
395		}
396

phpDocumentor / GraphViz

Graph::__get() A last analyzed 2021-02-02 21:12 UTC

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Graph::__get() A
last analyzed 2021-02-02 21:12 UTC