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<?php |
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namespace Consolidation\AnnotatedCommand\Parser\Internal; |
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class FullyQualifiedClassCache |
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{ |
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protected $classCache = []; |
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protected $namespaceCache = []; |
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public function qualify($filename, $className) |
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{ |
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$this->primeCache($filename, $className); |
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return $this->cached($filename, $className); |
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} |
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protected function cached($filename, $className) |
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{ |
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return isset($this->classCache[$filename][$className]) ? $this->classCache[$filename][$className] : $className; |
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} |
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protected function primeCache($filename, $className) |
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{ |
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// If the cache has already been primed, do no further work |
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if (isset($this->namespaceCache[$filename])) { |
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return false; |
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} |
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$handle = fopen($filename, "r"); |
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if (!$handle) { |
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return false; |
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} |
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$namespaceName = $this->primeNamespaceCache($filename, $handle); |
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$this->primeUseCache($filename, $handle); |
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// If there is no 'use' statement for the className, then |
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// generate an effective classname from the namespace |
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if (!isset($this->classCache[$filename][$className])) { |
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$this->classCache[$filename][$className] = $namespaceName . '\\' . $className; |
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} |
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fclose($handle); |
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} |
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protected function primeNamespaceCache($filename, $handle) |
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{ |
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$namespaceName = $this->readNamespace($handle); |
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if (!$namespaceName) { |
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return false; |
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} |
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$this->namespaceCache[$filename] = $namespaceName; |
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return $namespaceName; |
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} |
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protected function primeUseCache($filename, $handle) |
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{ |
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$usedClasses = $this->readUseStatements($handle); |
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if (empty($usedClasses)) { |
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return false; |
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} |
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$this->classCache[$filename] = $usedClasses; |
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} |
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protected function readNamespace($handle) |
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{ |
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$namespaceRegex = '#^\s*namespace\s+#'; |
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$line = $this->readNextRelevantLine($handle); |
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if (!$line || !preg_match($namespaceRegex, $line)) { |
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return false; |
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} |
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$namespaceName = preg_replace($namespaceRegex, '', $line); |
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$namespaceName = rtrim($namespaceName, ';'); |
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return $namespaceName; |
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} |
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protected function readUseStatements($handle) |
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{ |
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$useRegex = '#^\s*use\s+#'; |
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$result = []; |
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while (true) { |
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$line = $this->readNextRelevantLine($handle); |
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if (!$line || !preg_match($useRegex, $line)) { |
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return $result; |
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} |
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$usedClass = preg_replace($useRegex, '', $line); |
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$usedClass = rtrim($usedClass, ';'); |
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$unqualifiedClass = preg_replace('#.*\\\\#', '', $usedClass); |
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// If this is an aliased class, 'use \Foo\Bar as Baz', then adjust |
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if (strpos($usedClass, ' as ')) { |
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$unqualifiedClass = preg_replace('#.*\sas\s+#', '', $usedClass); |
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$usedClass = preg_replace('#\s+as\s+#', '', $usedClass); |
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} |
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$result[$unqualifiedClass] = $usedClass; |
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} |
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} |
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protected function readNextRelevantLine($handle) |
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{ |
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while (($line = fgets($handle)) !== false) { |
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if (preg_match('#^\s*\w#', $line)) { |
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return trim($line); |
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} |
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} |
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return false; |
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} |
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} |
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In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
string
values, the empty string''
is a special case, in particular the following results might be unexpected: