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<?php |
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namespace dokuwiki\Utils; |
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/** |
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* Resolving relative IDs to absolute ones |
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*/ |
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abstract class Resolver |
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{ |
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/** @var string context page ID */ |
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protected $contextID; |
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/** @var string namespace of context page ID */ |
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protected $contextNS; |
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/** |
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* @param string $contextID the current pageID that's the context to resolve relative IDs to |
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*/ |
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public function __construct($contextID) |
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{ |
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$this->contextID = $contextID; |
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$this->contextNS = (string)getNS($contextID); |
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} |
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/** |
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* Resolves a given ID to be absolute |
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* |
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* @param string $id The ID to resolve |
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* @param string|int|false $rev The revision time to use when resolving |
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* @param bool $isDateAt Is the given revision only a datetime hint not an exact revision? |
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* @return string |
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*/ |
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public function resolveId($id, $rev = '', $isDateAt = false) |
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{ |
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global $conf; |
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// some pre cleaning for useslash: |
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if ($conf['useslash']) $id = str_replace('/', ':', $id); |
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// on some systems, semicolons might be used instead of colons: |
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$id = str_replace(';', ':', $id); |
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$id = $this->resolvePrefix($id); |
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$id = $this->resolveRelatives($id); |
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return $id; |
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} |
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/** |
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* Handle IDs starting with . or ~ and prepend the proper prefix |
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* |
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* @param string $id |
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* @return string |
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*/ |
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protected function resolvePrefix($id) |
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{ |
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// relative to current page (makes the current page a start page) |
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if ($id[0] === '~') { |
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$id = $this->contextID . ':' . $id; |
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} |
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// relative to current namespace |
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if ($id[0] === '.') { |
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// normalize initial dots without a colon |
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// FIXME do we need this or would this be cleaned later in resolveRelatives? |
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$id = preg_replace('/^((\.+:)*)(\.+)(?=[^:\.])/', '\1\3:', $id); |
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$id = $this->contextNS . ':' . $id; |
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} |
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return $id; |
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} |
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/** |
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* Handle . and .. within IDs |
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* |
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* @param string $id |
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* @return string |
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*/ |
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protected function resolveRelatives($id) |
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{ |
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// cleanup relatives |
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$result = array(); |
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$parts = explode(':', $id); |
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if (!$parts[0]) $result[] = ''; // FIXME is this necessary? what's it for? should it be type checked? |
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foreach ($parts AS $key => $dir) { |
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if ($dir == '..') { |
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if (end($result) == '..') { |
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$result[] = '..'; |
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} elseif (!array_pop($result)) { |
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$result[] = '..'; |
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} |
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} elseif ($dir && $dir != '.') { |
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$result[] = $dir; |
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} |
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} |
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if (!end($parts)) $result[] = ''; |
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$id = implode(':', $result); |
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return $id; |
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} |
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} |
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splitbrain /
dokuwiki
