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<?php |
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/** |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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namespace fkooman\RemoteStorage; |
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use fkooman\RemoteStorage\Exception\PathException; |
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class Path |
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{ |
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/** @var string */ |
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private $p; |
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/** @var array */ |
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private $pathParts; |
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public function __construct($p) |
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{ |
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if (!is_string($p)) { |
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throw new PathException('invalid path: not a string'); |
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} |
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// MUST contain at least one slash and start with it |
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if (0 !== strpos($p, '/')) { |
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throw new PathException('invalid path: does not start with /'); |
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} |
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// MUST NOT contain encoded "/" |
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if (false !== stripos($p, '%2f')) { |
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throw new PathException('invalid path: contains encoded "/"'); |
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} |
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// MUST NOT contain encoded "\0" |
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if (false !== strpos($p, '%00')) { |
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throw new PathException('invalid path: contains encoded "\0"'); |
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} |
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// MUST NOT contain ".." |
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if (false !== strpos($p, '..')) { |
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throw new PathException('invalid path: contains ..'); |
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} |
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// MUST NOT contain "%2e%2e" |
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if (false !== stripos($p, '%2e%2e')) { |
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throw new PathException('invalid path: contains encoded ".."'); |
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} |
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// MUST NOT contain "//" |
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if (false !== strpos($p, '//')) { |
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throw new PathException('invalid path: contains //'); |
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} |
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// MUST contain a user |
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$pathParts = explode('/', $p); |
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if (count($pathParts) < 3) { |
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throw new PathException('invalid path: no user specified'); |
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} |
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foreach ($pathParts as $pathPart) { |
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$this->pathParts[] = rawurldecode($pathPart); |
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} |
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$this->p = implode('/', $this->pathParts); |
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} |
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public function getPath() |
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{ |
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return $this->p; |
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} |
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public function getIsPublic() |
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{ |
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return count($this->pathParts) > 3 && 'public' === $this->pathParts[2]; |
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} |
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public function getUserId() |
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{ |
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return $this->pathParts[1]; |
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} |
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public function getIsFolder() |
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{ |
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return empty($this->pathParts[count($this->pathParts) - 1]); |
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} |
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public function getIsDocument() |
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{ |
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return !$this->getIsFolder(); |
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} |
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public function getModuleName() |
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{ |
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$moduleNamePosition = $this->getIsPublic() ? 3 : 2; |
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if (count($this->pathParts) > $moduleNamePosition + 1) { |
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return $this->pathParts[$moduleNamePosition]; |
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} |
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return false; |
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} |
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public function getFolderPath() |
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{ |
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if ($this->getIsFolder()) { |
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return $this->p; |
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} |
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return substr($this->p, 0, strrpos($this->p, '/') + 1); |
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} |
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public function getFolderTreeToUserRoot() |
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{ |
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$p = $this->getFolderPath(); |
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do { |
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$folderTree[] = $p; |
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// remove from last "/" to previous "/", e.g.: |
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// "/foo/bar/baz/" -> "/foo/bar/" |
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// remove the last "/" |
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$p = substr($p, 0, strlen($p) - 1); |
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// remove everything after the now last "/" |
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$p = substr($p, 0, strrpos($p, '/') + 1); |
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} while (substr_count($p, '/') > 1); |
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return $folderTree; |
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} |
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public function getFolderTreeFromUserRoot() |
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{ |
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return array_reverse($this->getFolderTreeToUserRoot()); |
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} |
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} |
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Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.
Let’s take a look at an example:
As you can see in this example, the array
$myArrayis initialized the first time when the foreach loop is entered. You can also see that the value of thebarkey is only written conditionally; thus, its value might result from a previous iteration.This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.