YamlTransformer::transform() - Code Metrics - micmania1/silverstripe-config - Measure and Improve Code Quality continuously with Scrutinizer

YamlTransformer::transform() B
last analyzed 2017-02-12 20:58 UTC

↳ Parent: YamlTransformer

Complexity

Conditions	4
Paths	4

Size

Total Lines	31
Code Lines	15

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	17
CRAP Score	4

Importance

Changes	2
Bugs	0	Features	1

Metric	Value
c	2
b	0
f	1
dl	0
loc	31
ccs	17
cts	17
cp	1
rs	8.5806
cc	4
eloc	15
nc	4
nop	0
crap	4

<?php

namespace micmania1\config\Transformer;

use micmania1\config\MergeStrategy\Priority;
use micmania1\config\ConfigCollectionInterface;
use micmania1\config\ConfigCollection;
use Symfony\Component\Yaml\Yaml as YamlParser;
use Symfony\Component\Finder\Finder;
use MJS\TopSort\Implementations\ArraySort;
use Exception;
use Closure;

class YamlTransformer implements TransformerInterface
{
    /**
     * @const string
     */
    const BEFORE_FLAG = 'before';

    /**
     * @const string
     */
    const AFTER_FLAG = 'after';

    /**
     * @var string
     */
    const ONLY_FLAG = 'only';

    /**
     * @var string
     */
    const EXCEPT_FLAG = 'except';

    /**
     * A list of files. Real, full path.
     *
     * @var array
     */
    protected $files = [];

    /**
     * Store the yaml document content as an array.
     *
     * @var array
     */
    protected $documents = [];

    /**
     * @var ConfigCollectionInterface
     */
    protected $collection;

    /**
     * Base directory used to find yaml files.
     *
     * @var string
     */
    protected $baseDirectory;

    /**
     * A list of closures to be used in only/except rules.
     *
     * @var Closure[]
     */
    protected $rules = [];

    /**
     * A list of ignored before/after statements.
     *
     * @var array
     */
    protected $ignoreRules = [];

    /**
     * @param string $baseDir directory to scan for yaml files
     * @param Finder $finder
     * @param ConfigCollectionInterface $collection
     */
    public function __construct($baseDir, Finder $finder, ConfigCollectionInterface $collection)
    {
        $this->baseDirectory = $baseDir;
        $this->collection = $collection;

        foreach ($finder as $file) {
            $this->files[$file->getPathname()] = $file->getPathname();
        }
    }

    /**
     * This is responsible for parsing a single yaml file and returning it into a format
     * that Config can understand. Config will then be responsible for turning thie
     * output into the final merged config.
     *
     * @return ConfigCollectionInterface
     */
    public function transform()
    {
        $mergeStrategy = new Priority();

        $documents = $this->getSortedYamlDocuments();

        foreach ($documents as $document) {
            if (!empty($document['content'])) {
                // We prepare the meta data
                $metadata = $document['header'];
                $metadata['transformer'] = static::class;
                $metadata['filename'] = $document['filename'];

                // We create a temporary collection for each document before merging it
                // into the existing collection
                $items = [];

                // And create each item
                foreach($document['content'] as $key => $value) {
                    $items[$key] = [
                        'value' => $value,
                        'metadata' => $metadata
                    ];
                }

                $mergeStrategy->merge($items, $this->collection);
            }
        }

        return $this->collection;
    }

    /**
     * This allows external rules to be added to only/except checks. Config is only
     * supposed to be setup once, so adding rules is a one-way system. You cannot
     * remove rules after being set. This also prevent built-in rules from being
     * removed.
     *
     * @param string $rule
     * @param Closure $func
     */
    public function addRule($rule, Closure $func)
    {
        $rule = strtolower($rule);
        $this->rules[$rule] = $func;
    }

    /**
     * Checks to see if a rule is present
     *
     * @var string
     *
     * @return boolean
     */
    protected function hasRule($rule)
    {
        $rule = strtolower($rule);
        return isset($this->rules[$rule]);
    }

    /**
     * This allows config to ignore only/except rules that have been set. This enables
     * apps to ignore built-in rules without causing errors where a rule is undefined.
     * This, is a one-way system and is only meant to be configured once. When you
     * ignore a rule, you cannot un-ignore it.
     *
     * @param string $rule
     */
    public function ignoreRule($rule)
    {
        $rule = strtolower($rule);
        $this->ignoreRules[$rule] = $rule;
    }

    /**
     * Checks to see if a rule is ignored
     *
     * @param string $rule
     *
     * @return boolean
     */
    protected function isRuleIgnored($rule)
    {
        $rule = strtolower($rule);

        return isset($this->ignoreRules[$rule]);
    }

    /**
     * Returns an array of YAML documents keyed by name.
     *
     * @return array
     */
    protected function getNamedYamlDocuments()
    {
        $unnamed = $this->splitYamlDocuments();

        $documents = [];
        foreach ($unnamed as $uniqueKey => $document) {
            $header = YamlParser::parse($document['header']) ?: [];
            $header = array_change_key_case($header, CASE_LOWER);

            $content = YamlParser::parse($document['content']);

            if (!isset($header['name'])) {
                // We automatically name this yaml doc. If it clashes with another, an
                // exception will be thrown below.
                $header['name'] = 'anonymous-'.$uniqueKey;
            }

            // Check if a document with that name already exists
            if (isset($documents[$header['name']])) {
                throw new Exception(
                    sprintf('More than one YAML document exists named \'%s\'.', $header['name'])
                );
            }

            $documents[$header['name']] = [
                'filename' => $document['filename'],
                'header' => $header,
                'content' => $content,
            ];
        }

        return $documents;
    }

    /**
     * Because multiple documents aren't supported in symfony/yaml, we have to manually
     * split the files up into their own documents before running them through the parser.
     * Note: This is not a complete implementation of multi-document YAML parsing. There
     * are valid yaml cases where this will fail, however they don't match our use-case.
     *
     * @return array
     */
    protected function splitYamlDocuments()
    {
        $documents = [];
        $key = 0;

        // We need to loop through each file and parse the yaml content
        foreach ($this->files as $file) {
            $lines = file($file, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);

            $firstLine = true;
            $context = 'content';
            foreach ($lines as $line) {
                if (empty($line)) {
                    continue;
                }

                if (!isset($documents[$key])) {
                    $documents[$key] = [
                        'filename' => $file,
                        'header' => '',
                        'content' => '',
                    ];
                }

                if (($context === 'content' || $firstLine) && ($line === '---' || $line === '...')) {

                    // '...' is the end of a document with no more documents after it.
                    if($line === '...') {
                        ++$key;
                        break;
                    }

                    $context = 'header';

                    // If this isn't the first line (and therefor first doc) we'll increase
                    // our document key
                    if (!$firstLine) {
                        ++$key;
                    }
                } elseif ($context === 'header' && $line === '---') {
                    $context = 'content';
                } else {
                    $documents[$key][$context] .= $line.PHP_EOL;
                }

                $firstLine = false;
            }

            // Always increase document count at the end of a file
            ++$key;
        }

        return $documents;
    }

    /**
     * This generates an array of all document depndencies, keyed by document name.
     *
     * @param array $documents
     *
     * @return array
     */
    protected function calculateDependencies($documents)
    {
        $dependencies = [];
        foreach ($documents as $key => $document) {
            $header = $document['header'];

            // If our document isn't yet listed in the dependencies we'll add it
            if (!isset($dependencies[$header['name']])) {
                $dependencies[$header['name']] = [];
            }

            // Add 'after' dependencies
            $dependencies = $this->addDependencies(
                $header,
                self::AFTER_FLAG,
                $dependencies,
                $documents
            );

            // Add 'before' dependencies
            $dependencies = $this->addDependencies(
                $header,
                self::BEFORE_FLAG,
                $dependencies,
                $documents
            );
        }

        return $dependencies;
    }

    /**
     * Incapsulates the logic for adding before/after dependencies.
     *
     * @param array        $header
     * @param string       $flag
     * @param array        $dependencies
     * @param array        $documents
     *
     * @return array
     */
    protected function addDependencies($header, $flag, $dependencies, $documents)
    {
        // If header isn't set then return dependencies
        if(!isset($header[$flag]) || !in_array($flag, [self::BEFORE_FLAG, self::AFTER_FLAG])) {
            return $dependencies;
        }

        // Normalise our input. YAML accpets string or array values.
        if (!is_array($header[$flag])) {
            $header[$flag] = [$header[$flag]];
        }

        foreach ($header[$flag] as $dependency) {
            // Because wildcards and hashes exist, our 'dependency' might actually match
            // multiple blocks and therefore could be multiple dependencies.
            $matchingDocuments = $this->getMatchingDocuments($dependency, $documents);

            foreach ($matchingDocuments as $document) {
                $dependencyName = $document['header']['name'];
                if (!isset($dependencies[$dependencyName])) {
                    $dependencies[$dependencyName] = [];
                }

                if ($flag == self::AFTER_FLAG) {
                    // For 'after' we add the given dependency to the current document
                    $dependencies[$header['name']][] = $dependencyName;
                } else {
                    // For 'before' we add the current document as a dependency to $before
                    $dependencies[$dependencyName][] = $header['name'];
                }
            }
        }

        return $dependencies;
    }

    /**
     * This returns an array of documents which match the given pattern. The pattern is
     * expected to come from before/after blocks of yaml (eg. framwork/*).
     *
     * @param string $pattern
     * @param array
     *
     * @return array
     */
    protected function getMatchingDocuments($pattern, $documents)
    {
        // If the pattern exists as a document name then its just a simple name match
        // and we can return that single document.
        if (isset($documents[$pattern])) {
            return [$documents[$pattern]];
        }

        // If the pattern starts with a hash, it means we're looking for a single document
        // named without the hash.
        if (strpos($pattern, '#') === 0) {
            $name = substr($pattern, 1);
            if (isset($documents[$name])) {
                return [$documents[$name]];
            }

            return [];
        }

        // If we only have an astericks, we'll add all unnamed docs. By excluding named docs
        // we don't run into a circular depndency issue.
        if($pattern === '*') {
            $pattern = 'anonymous-*';
        }

        // Do pattern matching on file names. This requires us to loop through each document
        // and check their filename and maybe their document name, depending on the pattern.
        // We don't want to do any pattern matching after the first hash as the document name
        // is assumed to follow it.
        $firstHash = strpos('#', $pattern);
        $documentName = false;
        if ($firstHash !== false) {
            $documentName = substr($pattern, $firstHash + 1);
            $pattern = substr($pattern, 0, $firstHash);
        }

        // @todo better sanitisation needed for special chars (chars used by preg_match())
        $pattern = str_replace(DIRECTORY_SEPARATOR, '\\'.DIRECTORY_SEPARATOR, $pattern);
        $pattern = str_replace('*', '[^\.][a-zA-Z0-9\-_\/\.]+', $pattern);

        $matchedDocuments = [];
        foreach ($documents as $document) {
            // Ensure filename is relative
            $filename = $this->makeRelative($document['filename']);
            if (preg_match('%^'.$pattern.'%', $filename)) {
                if (!empty($documentName) && $documentName != $document['header']['name']) {
                    // If we're looking for a specific document. If not found we can continue
                    continue;
                }

                $matchedDocuments[] = $document;
            }
        }

        return $matchedDocuments;
    }

    /**
     * We need this to make the path relative from the base directory. We can't use realpath
     * or relative path in Finder because we use a virtual filesystem in testing which
     * doesn't support these methods.
     *
     * @param string $filename
     *
     * @return string
     */
    protected function makeRelative($filename)
    {
        $dir = substr($filename, 0, strlen($this->baseDirectory));
        if ($dir == $this->baseDirectory) {
            return trim(substr($filename, strlen($this->baseDirectory)), DIRECTORY_SEPARATOR);
        }

        return trim($filename, DIRECTORY_SEPARATOR);
    }

    /**
     * This method gets all headers and all yaml documents and stores them respectively.
     *
     * @return array a list of sorted yaml documents
     */
    protected function getSortedYamlDocuments()
    {
        $documents = $this->filterByOnlyAndExcept();
        $dependencies = $this->calculateDependencies($documents);

        // Now that we've built up our dependencies, we can pass them into
        // a topological sort and return the headers.
        $sorter = new ArraySort();
        $sorter->set($dependencies);
        $sorted = $sorter->sort();

        $orderedDocuments = [];
        foreach ($sorted as $name) {
            if (!empty($documents[$name])) {
                $orderedDocuments[$name] = $documents[$name];
            }
        }

        return $orderedDocuments;
    }

    /**
     * This filteres out any yaml documents which don't pass their only
     * or except statement tests.
     *
     * @return array
     */
    protected function filterByOnlyAndExcept()
    {
        $documents = $this->getNamedYamlDocuments();
        $filtered = [];
        foreach($documents as $key => $document) {
            // If not all rules match, then we exclude this document
            if(!$this->testRules($document['header'], self::ONLY_FLAG)) {
                continue;
            }

            // If all rules pass, then we exclude this document
            if($this->testRules($document['header'], self::EXCEPT_FLAG)) {
                continue;
            }

            $filtered[$key] = $document;
        }

        return $filtered;
    }

    /**
     * Tests the only except rules for a header.
     *
     * @param array $header
     * @param string $flag
     *
     * @return boolean
     */
    protected function testRules($header, $flag)
    {
        // If flag is not set, then it has no tests
        if(!isset($header[$flag])) {
            // We want only to pass, except to fail
            return $flag === self::ONLY_FLAG;
        }

        if(!is_array($header[$flag])) {
            throw new Exception(sprintf('\'%s\' statements must be an array', $flag));
        }

        foreach($header[$flag] as $rule => $params) {
            if($this->isRuleIgnored($rule)) {
                // If checking only, then return true. Otherwise, return false.
                return $flag === self::ONLY_FLAG;
            }

            if(!$this->testSingleRule($rule, $params)) {
                return false;
            }
        }

        return true;
    }

    /**
     * Tests a rule against the given expected result.
     *
     * @param string $rule
     * @param string|array $params
     *
     * @return boolean
     */
    protected function testSingleRule($rule, $params)
    {
        if(!$this->hasRule($rule)) {
            throw new Exception(sprintf('Rule \'%s\' doesn\'t exist.', $rule));
        }

        if(!is_array($params)) {
            return $this->rules[$rule]($params);
        }

        // If its an array, we'll loop through each parameter
        foreach($params as $key => $value) {
            if(!$this->rules[$rule]($key, $value)) {
                return false;
            }
        }

        return true;
    }
}


1		<?php
2
3		namespace micmania1\config\Transformer;
4
5		use micmania1\config\MergeStrategy\Priority;
6		use micmania1\config\ConfigCollectionInterface;
7		use micmania1\config\ConfigCollection;
8		use Symfony\Component\Yaml\Yaml as YamlParser;
9		use Symfony\Component\Finder\Finder;
10		use MJS\TopSort\Implementations\ArraySort;
11		use Exception;
12		use Closure;
13
14		class YamlTransformer implements TransformerInterface
15		{
16		/**
17		* @const string
18		*/
19		const BEFORE_FLAG = 'before';
20
21		/**
22		* @const string
23		*/
24		const AFTER_FLAG = 'after';
25
26		/**
27		* @var string
28		*/
29		const ONLY_FLAG = 'only';
30
31		/**
32		* @var string
33		*/
34		const EXCEPT_FLAG = 'except';
35
36		/**
37		* A list of files. Real, full path.
38		*
39		* @var array
40		*/
41		protected $files = [];
42
43		/**
44		* Store the yaml document content as an array.
45		*
46		* @var array
47		*/
48		protected $documents = [];
49
50		/**
51		* @var ConfigCollectionInterface
52		*/
53		protected $collection;
54
55		/**
56		* Base directory used to find yaml files.
57		*
58		* @var string
59		*/
60		protected $baseDirectory;
61
62		/**
63		* A list of closures to be used in only/except rules.
64		*
65		* @var Closure[]
66		*/
67		protected $rules = [];
68
69		/**
70		* A list of ignored before/after statements.
71		*
72		* @var array
73		*/
74		protected $ignoreRules = [];
75
76		/**
77		* @param string $baseDir directory to scan for yaml files
78		* @param Finder $finder
79		* @param ConfigCollectionInterface $collection
80		*/
81	13	public function __construct($baseDir, Finder $finder, ConfigCollectionInterface $collection)
82		{
83	13	$this->baseDirectory = $baseDir;
84	13	$this->collection = $collection;
85
86	13	foreach ($finder as $file) {
87	13	$this->files[$file->getPathname()] = $file->getPathname();
88	13	}
89	13	}
90
91		/**
92		* This is responsible for parsing a single yaml file and returning it into a format
93		* that Config can understand. Config will then be responsible for turning thie
94		* output into the final merged config.
95		*
96		* @return ConfigCollectionInterface
97		*/
98	13	public function transform()
99		{
100	13	$mergeStrategy = new Priority();
101
102	13	$documents = $this->getSortedYamlDocuments();
103
104	12	foreach ($documents as $document) {
105	11	if (!empty($document['content'])) {
106		// We prepare the meta data
107	11	$metadata = $document['header'];
108	11	$metadata['transformer'] = static::class;
109		$metadata['filename'] = $document['filename'];
110
111		// We create a temporary collection for each document before merging it
112	11	// into the existing collection
113		$items = [];
114
115	11	// And create each item
116	11	foreach($document['content'] as $key => $value) {
117	11	$items[$key] = [
118		'value' => $value,
119	11	'metadata' => $metadata
120	11	];
121		}
122	11
123	11	$mergeStrategy->merge($items, $this->collection);
124	12	}
125		}
126	12
127		return $this->collection;
128		}
129
130		/**
131		* This allows external rules to be added to only/except checks. Config is only
132		* supposed to be setup once, so adding rules is a one-way system. You cannot
133		* remove rules after being set. This also prevent built-in rules from being
134		* removed.
135		*
136		* @param string $rule
137		* @param Closure $func
138	5	*/
139		public function addRule($rule, Closure $func)
140	5	{
141	5	$rule = strtolower($rule);
142	5	$this->rules[$rule] = $func;
143		}
144
145		/**
146		* Checks to see if a rule is present
147		*
148		* @var string
149		*
150		* @return boolean
151	4	*/
152		protected function hasRule($rule)
153	4	{
154	4	$rule = strtolower($rule);
155		return isset($this->rules[$rule]);
156		}
157
158		/**
159		* This allows config to ignore only/except rules that have been set. This enables
160		* apps to ignore built-in rules without causing errors where a rule is undefined.
161		* This, is a one-way system and is only meant to be configured once. When you
162		* ignore a rule, you cannot un-ignore it.
163		*
164		* @param string $rule
165	1	*/
166		public function ignoreRule($rule)
167	1	{
168	1	$rule = strtolower($rule);
169	1	$this->ignoreRules[$rule] = $rule;
170		}
171
172		/**
173		* Checks to see if a rule is ignored
174		*
175		* @param string $rule
176		*
177		* @return boolean
178	5	*/
179		protected function isRuleIgnored($rule)
180	5	{
181		$rule = strtolower($rule);
182	5
183		return isset($this->ignoreRules[$rule]);
184		}
185
186		/**
187		* Returns an array of YAML documents keyed by name.
188		*
189		* @return array
190	13	*/
191		protected function getNamedYamlDocuments()
192	13	{
193		$unnamed = $this->splitYamlDocuments();
194	13
195	13	$documents = [];
196	12	foreach ($unnamed as $uniqueKey => $document) {
197	12	$header = YamlParser::parse($document['header']) ?: [];
198		$header = array_change_key_case($header, CASE_LOWER);
199	12
200		$content = YamlParser::parse($document['content']);
201	12
202		if (!isset($header['name'])) {
203		// We automatically name this yaml doc. If it clashes with another, an
204	5	// exception will be thrown below.
205	5	$header['name'] = 'anonymous-'.$uniqueKey;
206		}
207
208	12	// Check if a document with that name already exists
209		if (isset($documents[$header['name']])) {
210		throw new Exception(
211		sprintf('More than one YAML document exists named \'%s\'.', $header['name'])
212		);
213		}
214	12
215	12	$documents[$header['name']] = [
216	12	'filename' => $document['filename'],
217	12	'header' => $header,
218		'content' => $content,
219	13	];
220		}
221	13
222		return $documents;
223		}
224
225		/**
226		* Because multiple documents aren't supported in symfony/yaml, we have to manually
227		* split the files up into their own documents before running them through the parser.
228		* Note: This is not a complete implementation of multi-document YAML parsing. There
229		* are valid yaml cases where this will fail, however they don't match our use-case.
230		*
231		* @return array
232	13	*/
233		protected function splitYamlDocuments()
234	13	{
235	13	$documents = [];
236		$key = 0;
237
238	13	// We need to loop through each file and parse the yaml content
239	13	foreach ($this->files as $file) {
240		$lines = file($file, FILE_IGNORE_NEW_LINES \| FILE_SKIP_EMPTY_LINES);
241	13
242	13	$firstLine = true;
243	13	$context = 'content';
244	12	foreach ($lines as $line) {
245		if (empty($line)) {
246		continue;
247		}
248	12
249	12	if (!isset($documents[$key])) {
250	12	$documents[$key] = [
251	12	'filename' => $file,
252	12	'header' => '',
253		'content' => '',
254	12	];
255		}
256	12
257		if (($context === 'content' \|\| $firstLine) && ($line === '---' \|\| $line === '...')) {
258
259	11	// '...' is the end of a document with no more documents after it.
260		if($line === '...') {
261		++$key;
262		break;
263		}
264	11
265		$context = 'header';
266
267		// If this isn't the first line (and therefor first doc) we'll increase
268	11	// our document key
269	8	if (!$firstLine) {
270	8	++$key;
271	12	}
272	11	} elseif ($context === 'header' && $line === '---') {
273	11	$context = 'content';
274	12	} else {
275		$documents[$key][$context] .= $line.PHP_EOL;
276		}
277	12
278	13	$firstLine = false;
279		}
280
281	13	// Always increase document count at the end of a file
282	13	++$key;
283		}
284	13
285		return $documents;
286		}
287
288		/**
289		* This generates an array of all document depndencies, keyed by document name.
290		*
291		* @param array $documents
292		*
293		* @return array
294	13	*/
295		protected function calculateDependencies($documents)
296	13	{
297	13	$dependencies = [];
298	12	foreach ($documents as $key => $document) {
299		$header = $document['header'];
300
301	12	// If our document isn't yet listed in the dependencies we'll add it
302	12	if (!isset($dependencies[$header['name']])) {
303	12	$dependencies[$header['name']] = [];
304		}
305
306	12	// Add 'after' dependencies
307	12	$dependencies = $this->addDependencies(
308	12	$header,
309	12	self::AFTER_FLAG,
310		$dependencies,
311	12	$documents
312		);
313
314	12	// Add 'before' dependencies
315	12	$dependencies = $this->addDependencies(
316	12	$header,
317	12	self::BEFORE_FLAG,
318		$dependencies,
319	12	$documents
320	13	);
321		}
322	13
323		return $dependencies;
324		}
325
326		/**
327		* Incapsulates the logic for adding before/after dependencies.
328		*
329		* @param array $header
330		* @param string $flag
331		* @param array $dependencies
332		* @param array $documents
333		*
334		* @return array
335	12	*/
336		protected function addDependencies($header, $flag, $dependencies, $documents)
337		{
338	12	// If header isn't set then return dependencies
339	12	if(!isset($header[$flag]) \|\| !in_array($flag, [self::BEFORE_FLAG, self::AFTER_FLAG])) {
340		return $dependencies;
341		}
342
343	6	// Normalise our input. YAML accpets string or array values.
344	6	if (!is_array($header[$flag])) {
345	6	$header[$flag] = [$header[$flag]];
346		}
347	6
348		foreach ($header[$flag] as $dependency) {
349		// Because wildcards and hashes exist, our 'dependency' might actually match
350	6	// multiple blocks and therefore could be multiple dependencies.
351		$matchingDocuments = $this->getMatchingDocuments($dependency, $documents);
352	6
353	6	foreach ($matchingDocuments as $document) {
354	6	$dependencyName = $document['header']['name'];
355	1	if (!isset($dependencies[$dependencyName])) {
356	1	$dependencies[$dependencyName] = [];
357		}
358	6
359		if ($flag == self::AFTER_FLAG) {
360	3	// For 'after' we add the given dependency to the current document
361	3	$dependencies[$header['name']][] = $dependencyName;
362		} else {
363	4	// For 'before' we add the current document as a dependency to $before
364		$dependencies[$dependencyName][] = $header['name'];
365	6	}
366	6	}
367		}
368	6
369		return $dependencies;
370		}
371
372		/**
373		* This returns an array of documents which match the given pattern. The pattern is
374		* expected to come from before/after blocks of yaml (eg. framwork/*).
375		*
376		* @param string $pattern
377		* @param array
378		*
379		* @return array
380	6	*/
381		protected function getMatchingDocuments($pattern, $documents)
382		{
383		// If the pattern exists as a document name then its just a simple name match
384	6	// and we can return that single document.
385	4	if (isset($documents[$pattern])) {
386		return [$documents[$pattern]];
387		}
388
389		// If the pattern starts with a hash, it means we're looking for a single document
390	2	// named without the hash.
391	1	if (strpos($pattern, '#') === 0) {
392	1	$name = substr($pattern, 1);
393	1	if (isset($documents[$name])) {
394		return [$documents[$name]];
395		}
396
397		return [];
398		}
399
400		// If we only have an astericks, we'll add all unnamed docs. By excluding named docs
401	1	// we don't run into a circular depndency issue.
402		if($pattern === '*') {
403		$pattern = 'anonymous-*';
404		}
405
406		// Do pattern matching on file names. This requires us to loop through each document
407		// and check their filename and maybe their document name, depending on the pattern.
408		// We don't want to do any pattern matching after the first hash as the document name
409	1	// is assumed to follow it.
410	1	$firstHash = strpos('#', $pattern);
411	1	$documentName = false;
412		if ($firstHash !== false) {
413		$documentName = substr($pattern, $firstHash + 1);
414		$pattern = substr($pattern, 0, $firstHash);
415		}
416
417	1	// @todo better sanitisation needed for special chars (chars used by preg_match())
418	1	$pattern = str_replace(DIRECTORY_SEPARATOR, '\\'.DIRECTORY_SEPARATOR, $pattern);
419		$pattern = str_replace('*', '[^\.][a-zA-Z0-9\-_\/\.]+', $pattern);
420	1
421	1	$matchedDocuments = [];
422		foreach ($documents as $document) {
423	1	// Ensure filename is relative
424	1	$filename = $this->makeRelative($document['filename']);
425	1	if (preg_match('%^'.$pattern.'%', $filename)) {
426		if (!empty($documentName) && $documentName != $document['header']['name']) {
427		// If we're looking for a specific document. If not found we can continue
428		continue;
429		}
430	1
431	1	$matchedDocuments[] = $document;
432	1	}
433		}
434	1
435		return $matchedDocuments;
436		}
437
438		/**
439		* We need this to make the path relative from the base directory. We can't use realpath
440		* or relative path in Finder because we use a virtual filesystem in testing which
441		* doesn't support these methods.
442		*
443		* @param string $filename
444		*
445		* @return string
446	1	*/
447		protected function makeRelative($filename)
448	1	{
449	1	$dir = substr($filename, 0, strlen($this->baseDirectory));
450	1	if ($dir == $this->baseDirectory) {
451		return trim(substr($filename, strlen($this->baseDirectory)), DIRECTORY_SEPARATOR);
452		}
453
454		return trim($filename, DIRECTORY_SEPARATOR);
455		}
456
457		/**
458		* This method gets all headers and all yaml documents and stores them respectively.
459		*
460		* @return array a list of sorted yaml documents
461	13	*/
462		protected function getSortedYamlDocuments()
463	13	{
464	13	$documents = $this->filterByOnlyAndExcept();
465		$dependencies = $this->calculateDependencies($documents);
466
467		// Now that we've built up our dependencies, we can pass them into
468	13	// a topological sort and return the headers.
469	13	$sorter = new ArraySort();
470	13	$sorter->set($dependencies);
471		$sorted = $sorter->sort();
472	12
473	12	$orderedDocuments = [];
474	11	foreach ($sorted as $name) {
475	11	if (!empty($documents[$name])) {
476	11	$orderedDocuments[$name] = $documents[$name];
477	12	}
478		}
479	12
480		return $orderedDocuments;
481		}
482
483		/**
484		* This filteres out any yaml documents which don't pass their only
485		* or except statement tests.
486		*
487		* @return array
488	13	*/
489		protected function filterByOnlyAndExcept()
490	13	{
491	13	$documents = $this->getNamedYamlDocuments();
492	13	$filtered = [];
493		foreach($documents as $key => $document) {
494	12	// If not all rules match, then we exclude this document
495	2	if(!$this->testRules($document['header'], self::ONLY_FLAG)) {
496		continue;
497		}
498
499	12	// If all rules pass, then we exclude this document
500	3	if($this->testRules($document['header'], self::EXCEPT_FLAG)) {
501		continue;
502		}
503	12
504	13	$filtered[$key] = $document;
505		}
506	13
507		return $filtered;
508		}
509
510		/**
511		* Tests the only except rules for a header.
512		*
513		* @param array $header
514		* @param string $flag
515		*
516		* @return boolean
517	12	*/
518		protected function testRules($header, $flag)
519		{
520	12	// If flag is not set, then it has no tests
521		if(!isset($header[$flag])) {
522	12	// We want only to pass, except to fail
523		return $flag === self::ONLY_FLAG;
524		}
525	5
526		if(!is_array($header[$flag])) {
527		throw new Exception(sprintf('\'%s\' statements must be an array', $flag));
528		}
529	5
530	5	foreach($header[$flag] as $rule => $params) {
531		if($this->isRuleIgnored($rule)) {
532	1	// If checking only, then return true. Otherwise, return false.
533		return $flag === self::ONLY_FLAG;
534		}
535	4
536	2	if(!$this->testSingleRule($rule, $params)) {
537		return false;
538	4	}
539		}
540	4
541		return true;
542		}
543
544		/**
545		* Tests a rule against the given expected result.
546		*
547		* @param string $rule
548		* @param string\|array $params
549		*
550		* @return boolean
551	4	*/
552		protected function testSingleRule($rule, $params)
553	4	{
554		if(!$this->hasRule($rule)) {
555		throw new Exception(sprintf('Rule \'%s\' doesn\'t exist.', $rule));
556		}
557	4
558	3	if(!is_array($params)) {
559		return $this->rules[$rule]($params);
560		}
561
562	1	// If its an array, we'll loop through each parameter
563	1	foreach($params as $key => $value) {
564	1	if(!$this->rules[$rule]($key, $value)) {
565		return false;
566	1	}
567		}
568	1
569		return true;
570		}
571		}
572

micmania1 / silverstripe-config

YamlTransformer::transform() B last analyzed 2017-02-12 20:58 UTC

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YamlTransformer::transform() B
last analyzed 2017-02-12 20:58 UTC