1442 lines
43 KiB
PHP
1442 lines
43 KiB
PHP
<?php
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namespace Mf2;
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use DOMDocument;
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use DOMElement;
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use DOMXPath;
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use DOMNode;
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use DOMNodeList;
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use Exception;
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use SplObjectStorage;
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use stdClass;
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/**
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* Parse Microformats2
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*
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* Functional shortcut for the commonest cases of parsing microformats2 from HTML.
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*
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* Example usage:
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*
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* use Mf2;
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* $output = Mf2\parse('<span class="h-card">Barnaby Walters</span>');
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* echo json_encode($output, JSON_PRETTY_PRINT);
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*
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* Produces:
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*
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* {
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* "items": [
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* {
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* "type": ["h-card"],
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* "properties": {
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* "name": ["Barnaby Walters"]
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* }
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* }
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* ],
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* "rels": {}
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* }
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*
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* @param string|DOMDocument $input The HTML string or DOMDocument object to parse
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* @param string $url The URL the input document was found at, for relative URL resolution
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* @param bool $convertClassic whether or not to convert classic microformats
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* @return array Canonical MF2 array structure
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*/
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function parse($input, $url = null, $convertClassic = true) {
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$parser = new Parser($input, $url);
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return $parser->parse($convertClassic);
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}
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/**
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* Fetch microformats2
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*
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* Given a URL, fetches it (following up to 5 redirects) and, if the content-type appears to be HTML, returns the parsed
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* microformats2 array structure.
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*
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* Not that even if the response code was a 4XX or 5XX error, if the content-type is HTML-like then it will be parsed
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* all the same, as there are legitimate cases where error pages might contain useful microformats (for example a deleted
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* h-entry resulting in a 410 Gone page with a stub h-entry explaining the reason for deletion). Look in $curlInfo['http_code']
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* for the actual value.
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*
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* @param string $url The URL to fetch
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* @param bool $convertClassic (optional, default true) whether or not to convert classic microformats
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* @param &array $curlInfo (optional) the results of curl_getinfo will be placed in this variable for debugging
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* @return array|null canonical microformats2 array structure on success, null on failure
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*/
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function fetch($url, $convertClassic = true, &$curlInfo=null) {
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$ch = curl_init();
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curl_setopt($ch, CURLOPT_URL, $url);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
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curl_setopt($ch, CURLOPT_HEADER, 0);
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curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
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curl_setopt($ch, CURLOPT_MAXREDIRS, 5);
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$html = curl_exec($ch);
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$info = $curlInfo = curl_getinfo($ch);
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curl_close($ch);
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if (strpos(strtolower($info['content_type']), 'html') === false) {
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// The content was not delivered as HTML, do not attempt to parse it.
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return null;
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}
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return parse($html, $url, $convertClassic);
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}
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/**
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* Unicode to HTML Entities
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* @param string $input String containing characters to convert into HTML entities
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* @return string
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*/
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function unicodeToHtmlEntities($input) {
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return mb_convert_encoding($input, 'HTML-ENTITIES', mb_detect_encoding($input));
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}
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/**
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* Collapse Whitespace
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*
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* Collapses any sequences of whitespace within a string into a single space
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* character.
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*
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* @deprecated since v0.2.3
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* @param string $str
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* @return string
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*/
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function collapseWhitespace($str) {
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return preg_replace('/[\s|\n]+/', ' ', $str);
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}
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function unicodeTrim($str) {
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// this is cheating. TODO: find a better way if this causes any problems
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$str = str_replace(mb_convert_encoding(' ', 'UTF-8', 'HTML-ENTITIES'), ' ', $str);
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$str = preg_replace('/^\s+/', '', $str);
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return preg_replace('/\s+$/', '', $str);
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}
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/**
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* Microformat Name From Class string
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*
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* Given the value of @class, get the relevant mf classnames (e.g. h-card,
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* p-name).
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*
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* @param string $class A space delimited list of classnames
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* @param string $prefix The prefix to look for
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* @return string|array The prefixed name of the first microfomats class found or false
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*/
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function mfNamesFromClass($class, $prefix='h-') {
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$class = str_replace(array(' ', ' ', "\n"), ' ', $class);
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$classes = explode(' ', $class);
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$matches = array();
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foreach ($classes as $classname) {
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$compare_classname = ' ' . $classname;
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$compare_prefix = ' ' . $prefix;
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if (strstr($compare_classname, $compare_prefix) !== false && ($compare_classname != $compare_prefix)) {
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$matches[] = ($prefix === 'h-') ? $classname : substr($classname, strlen($prefix));
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}
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}
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return $matches;
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}
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/**
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* Get Nested µf Property Name From Class
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*
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* Returns all the p-, u-, dt- or e- prefixed classnames it finds in a
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* space-separated string.
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*
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* @param string $class
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* @return array
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*/
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function nestedMfPropertyNamesFromClass($class) {
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$prefixes = array('p-', 'u-', 'dt-', 'e-');
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$propertyNames = array();
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$class = str_replace(array(' ', ' ', "\n"), ' ', $class);
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foreach (explode(' ', $class) as $classname) {
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foreach ($prefixes as $prefix) {
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// Check if $classname is a valid property classname for $prefix.
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if (mb_substr($classname, 0, mb_strlen($prefix)) == $prefix && $classname != $prefix) {
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$propertyName = mb_substr($classname, mb_strlen($prefix));
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$propertyNames[$propertyName][] = $prefix;
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}
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}
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}
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foreach ($propertyNames as $property => $prefixes) {
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$propertyNames[$property] = array_unique($prefixes);
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}
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return $propertyNames;
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}
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/**
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* Wraps mfNamesFromClass to handle an element as input (common)
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*
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* @param DOMElement $e The element to get the classname for
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* @param string $prefix The prefix to look for
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* @return mixed See return value of mf2\Parser::mfNameFromClass()
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*/
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function mfNamesFromElement(\DOMElement $e, $prefix = 'h-') {
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$class = $e->getAttribute('class');
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return mfNamesFromClass($class, $prefix);
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}
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/**
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* Wraps nestedMfPropertyNamesFromClass to handle an element as input
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*/
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function nestedMfPropertyNamesFromElement(\DOMElement $e) {
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$class = $e->getAttribute('class');
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return nestedMfPropertyNamesFromClass($class);
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}
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/**
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* Converts various time formats to HH:MM
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* @param string $time The time to convert
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* @return string
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*/
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function convertTimeFormat($time) {
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$hh = $mm = $ss = '';
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preg_match('/(\d{1,2}):?(\d{2})?:?(\d{2})?(a\.?m\.?|p\.?m\.?)?/i', $time, $matches);
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// If no am/pm is specified:
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if (empty($matches[4])) {
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return $time;
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} else {
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// Otherwise, am/pm is specified.
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$meridiem = strtolower(str_replace('.', '', $matches[4]));
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// Hours.
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$hh = $matches[1];
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// Add 12 to hours if pm applies.
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if ($meridiem == 'pm' && ($hh < 12)) {
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$hh += 12;
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}
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$hh = str_pad($hh, 2, '0', STR_PAD_LEFT);
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// Minutes.
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$mm = (empty($matches[2]) ) ? '00' : $matches[2];
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// Seconds, only if supplied.
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if (!empty($matches[3])) {
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$ss = $matches[3];
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}
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if (empty($ss)) {
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return sprintf('%s:%s', $hh, $mm);
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}
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else {
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return sprintf('%s:%s:%s', $hh, $mm, $ss);
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}
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}
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}
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/**
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* Microformats2 Parser
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*
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* A class which holds state for parsing microformats2 from HTML.
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*
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* Example usage:
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*
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* use Mf2;
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* $parser = new Mf2\Parser('<p class="h-card">Barnaby Walters</p>');
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* $output = $parser->parse();
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*/
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class Parser {
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/** @var string The baseurl (if any) to use for this parse */
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public $baseurl;
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/** @var DOMXPath object which can be used to query over any fragment*/
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public $xpath;
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/** @var DOMDocument */
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public $doc;
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/** @var SplObjectStorage */
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protected $parsed;
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public $jsonMode;
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/**
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* Constructor
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*
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* @param DOMDocument|string $input The data to parse. A string of HTML or a DOMDocument
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* @param string $url The URL of the parsed document, for relative URL resolution
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* @param boolean $jsonMode Whether or not to use a stdClass instance for an empty `rels` dictionary. This breaks PHP looping over rels, but allows the output to be correctly serialized as JSON.
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*/
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public function __construct($input, $url = null, $jsonMode = false) {
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libxml_use_internal_errors(true);
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if (is_string($input)) {
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$doc = new DOMDocument();
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@$doc->loadHTML(unicodeToHtmlEntities($input));
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} elseif (is_a($input, 'DOMDocument')) {
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$doc = $input;
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} else {
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$doc = new DOMDocument();
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@$doc->loadHTML('');
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}
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$this->xpath = new DOMXPath($doc);
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$baseurl = $url;
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foreach ($this->xpath->query('//base[@href]') as $base) {
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$baseElementUrl = $base->getAttribute('href');
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if (parse_url($baseElementUrl, PHP_URL_SCHEME) === null) {
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/* The base element URL is relative to the document URL.
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*
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* :/
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*
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* Perhaps the author was high? */
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$baseurl = resolveUrl($url, $baseElementUrl);
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} else {
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$baseurl = $baseElementUrl;
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}
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break;
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}
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// Ignore <template> elements as per the HTML5 spec
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foreach ($this->xpath->query('//template') as $templateEl) {
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$templateEl->parentNode->removeChild($templateEl);
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}
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$this->baseurl = $baseurl;
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$this->doc = $doc;
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$this->parsed = new SplObjectStorage();
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$this->jsonMode = $jsonMode;
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}
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private function elementPrefixParsed(\DOMElement $e, $prefix) {
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if (!$this->parsed->contains($e))
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$this->parsed->attach($e, array());
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$prefixes = $this->parsed[$e];
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$prefixes[] = $prefix;
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$this->parsed[$e] = $prefixes;
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}
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private function isElementParsed(\DOMElement $e, $prefix) {
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if (!$this->parsed->contains($e))
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return false;
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$prefixes = $this->parsed[$e];
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if (!in_array($prefix, $prefixes))
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return false;
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return true;
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}
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private function resolveChildUrls(DOMElement $el) {
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$hyperlinkChildren = $this->xpath->query('.//*[@src or @href or @data]', $el);
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foreach ($hyperlinkChildren as $child) {
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if ($child->hasAttribute('href'))
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$child->setAttribute('href', $this->resolveUrl($child->getAttribute('href')));
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if ($child->hasAttribute('src'))
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$child->setAttribute('src', $this->resolveUrl($child->getAttribute('src')));
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if ($child->hasAttribute('data'))
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$child->setAttribute('data', $this->resolveUrl($child->getAttribute('data')));
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}
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}
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public function textContent(DOMElement $el) {
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$this->resolveChildUrls($el);
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$clonedEl = $el->cloneNode(true);
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||
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foreach ($this->xpath->query('.//img', $clonedEl) as $imgEl) {
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$newNode = $this->doc->createTextNode($imgEl->getAttribute($imgEl->hasAttribute('alt') ? 'alt' : 'src'));
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$imgEl->parentNode->replaceChild($newNode, $imgEl);
|
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}
|
||
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return $clonedEl->textContent;
|
||
}
|
||
|
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// TODO: figure out if this has problems with sms: and geo: URLs
|
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public function resolveUrl($url) {
|
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// If the URL is seriously malformed it’s probably beyond the scope of this
|
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// parser to try to do anything with it.
|
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if (parse_url($url) === false)
|
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return $url;
|
||
|
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$scheme = parse_url($url, PHP_URL_SCHEME);
|
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|
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if (empty($scheme) and !empty($this->baseurl)) {
|
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return resolveUrl($this->baseurl, $url);
|
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} else {
|
||
return $url;
|
||
}
|
||
}
|
||
|
||
// Parsing Functions
|
||
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||
/**
|
||
* Parse value-class/value-title on an element, joining with $separator if
|
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* there are multiple.
|
||
*
|
||
* @param \DOMElement $e
|
||
* @param string $separator = '' if multiple value-title elements, join with this string
|
||
* @return string|null the parsed value or null if value-class or -title aren’t in use
|
||
*/
|
||
public function parseValueClassTitle(\DOMElement $e, $separator = '') {
|
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$valueClassElements = $this->xpath->query('./*[contains(concat(" ", @class, " "), " value ")]', $e);
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|
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if ($valueClassElements->length !== 0) {
|
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// Process value-class stuff
|
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$val = '';
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foreach ($valueClassElements as $el) {
|
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$val .= $this->textContent($el);
|
||
}
|
||
|
||
return unicodeTrim($val);
|
||
}
|
||
|
||
$valueTitleElements = $this->xpath->query('./*[contains(concat(" ", @class, " "), " value-title ")]', $e);
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||
|
||
if ($valueTitleElements->length !== 0) {
|
||
// Process value-title stuff
|
||
$val = '';
|
||
foreach ($valueTitleElements as $el) {
|
||
$val .= $el->getAttribute('title');
|
||
}
|
||
|
||
return unicodeTrim($val);
|
||
}
|
||
|
||
// No value-title or -class in this element
|
||
return null;
|
||
}
|
||
|
||
/**
|
||
* Given an element with class="p-*", get it’s value
|
||
*
|
||
* @param DOMElement $p The element to parse
|
||
* @return string The plaintext value of $p, dependant on type
|
||
* @todo Make this adhere to value-class
|
||
*/
|
||
public function parseP(\DOMElement $p) {
|
||
$classTitle = $this->parseValueClassTitle($p, ' ');
|
||
|
||
if ($classTitle !== null)
|
||
return $classTitle;
|
||
|
||
if ($p->tagName == 'img' and $p->getAttribute('alt') !== '') {
|
||
$pValue = $p->getAttribute('alt');
|
||
} elseif ($p->tagName == 'area' and $p->getAttribute('alt') !== '') {
|
||
$pValue = $p->getAttribute('alt');
|
||
} elseif ($p->tagName == 'abbr' and $p->getAttribute('title') !== '') {
|
||
$pValue = $p->getAttribute('title');
|
||
} elseif (in_array($p->tagName, array('data', 'input')) and $p->getAttribute('value') !== '') {
|
||
$pValue = $p->getAttribute('value');
|
||
} else {
|
||
$pValue = unicodeTrim($this->textContent($p));
|
||
}
|
||
|
||
return $pValue;
|
||
}
|
||
|
||
/**
|
||
* Given an element with class="u-*", get the value of the URL
|
||
*
|
||
* @param DOMElement $u The element to parse
|
||
* @return string The plaintext value of $u, dependant on type
|
||
* @todo make this adhere to value-class
|
||
*/
|
||
public function parseU(\DOMElement $u) {
|
||
if (($u->tagName == 'a' or $u->tagName == 'area') and $u->getAttribute('href') !== null) {
|
||
$uValue = $u->getAttribute('href');
|
||
} elseif (in_array($u->tagName, array('img', 'audio', 'video', 'source')) and $u->getAttribute('src') !== null) {
|
||
$uValue = $u->getAttribute('src');
|
||
} elseif ($u->tagName == 'object' and $u->getAttribute('data') !== null) {
|
||
$uValue = $u->getAttribute('data');
|
||
}
|
||
|
||
if (isset($uValue)) {
|
||
return $this->resolveUrl($uValue);
|
||
}
|
||
|
||
$classTitle = $this->parseValueClassTitle($u);
|
||
|
||
if ($classTitle !== null) {
|
||
return $classTitle;
|
||
} elseif ($u->tagName == 'abbr' and $u->getAttribute('title') !== null) {
|
||
return $u->getAttribute('title');
|
||
} elseif (in_array($u->tagName, array('data', 'input')) and $u->getAttribute('value') !== null) {
|
||
return $u->getAttribute('value');
|
||
} else {
|
||
return unicodeTrim($this->textContent($u));
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Given an element with class="dt-*", get the value of the datetime as a php date object
|
||
*
|
||
* @param DOMElement $dt The element to parse
|
||
* @param array $dates Array of dates processed so far
|
||
* @return string The datetime string found
|
||
*/
|
||
public function parseDT(\DOMElement $dt, &$dates = array()) {
|
||
// Check for value-class pattern
|
||
$valueClassChildren = $this->xpath->query('./*[contains(concat(" ", @class, " "), " value ") or contains(concat(" ", @class, " "), " value-title ")]', $dt);
|
||
$dtValue = false;
|
||
|
||
if ($valueClassChildren->length > 0) {
|
||
// They’re using value-class
|
||
$dateParts = array();
|
||
|
||
foreach ($valueClassChildren as $e) {
|
||
if (strstr(' ' . $e->getAttribute('class') . ' ', ' value-title ')) {
|
||
$title = $e->getAttribute('title');
|
||
if (!empty($title))
|
||
$dateParts[] = $title;
|
||
}
|
||
elseif ($e->tagName == 'img' or $e->tagName == 'area') {
|
||
// Use @alt
|
||
$alt = $e->getAttribute('alt');
|
||
if (!empty($alt))
|
||
$dateParts[] = $alt;
|
||
}
|
||
elseif ($e->tagName == 'data') {
|
||
// Use @value, otherwise innertext
|
||
$value = $e->hasAttribute('value') ? $e->getAttribute('value') : unicodeTrim($e->nodeValue);
|
||
if (!empty($value))
|
||
$dateParts[] = $value;
|
||
}
|
||
elseif ($e->tagName == 'abbr') {
|
||
// Use @title, otherwise innertext
|
||
$title = $e->hasAttribute('title') ? $e->getAttribute('title') : unicodeTrim($e->nodeValue);
|
||
if (!empty($title))
|
||
$dateParts[] = $title;
|
||
}
|
||
elseif ($e->tagName == 'del' or $e->tagName == 'ins' or $e->tagName == 'time') {
|
||
// Use @datetime if available, otherwise innertext
|
||
$dtAttr = ($e->hasAttribute('datetime')) ? $e->getAttribute('datetime') : unicodeTrim($e->nodeValue);
|
||
if (!empty($dtAttr))
|
||
$dateParts[] = $dtAttr;
|
||
}
|
||
else {
|
||
if (!empty($e->nodeValue))
|
||
$dateParts[] = unicodeTrim($e->nodeValue);
|
||
}
|
||
}
|
||
|
||
// Look through dateParts
|
||
$datePart = '';
|
||
$timePart = '';
|
||
foreach ($dateParts as $part) {
|
||
// Is this part a full ISO8601 datetime?
|
||
if (preg_match('/^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}(?::\d{2})?(?:Z?[+|-]\d{2}:?\d{2})?$/', $part)) {
|
||
// Break completely, we’ve got our value.
|
||
$dtValue = $part;
|
||
break;
|
||
} else {
|
||
// Is the current part a valid time(+TZ?) AND no other time representation has been found?
|
||
if ((preg_match('/\d{1,2}:\d{1,2}(Z?[+|-]\d{2}:?\d{2})?/', $part) or preg_match('/\d{1,2}[a|p]m/', $part)) and empty($timePart)) {
|
||
$timePart = $part;
|
||
} elseif (preg_match('/\d{4}-\d{2}-\d{2}/', $part) and empty($datePart)) {
|
||
// Is the current part a valid date AND no other date representation has been found?
|
||
$datePart = $part;
|
||
}
|
||
|
||
if ( !empty($datePart) && !in_array($datePart, $dates) ) {
|
||
$dates[] = $datePart;
|
||
}
|
||
|
||
$dtValue = '';
|
||
|
||
if ( empty($datePart) && !empty($timePart) ) {
|
||
$timePart = convertTimeFormat($timePart);
|
||
$dtValue = unicodeTrim($timePart, 'T');
|
||
}
|
||
else if ( !empty($datePart) && empty($timePart) ) {
|
||
$dtValue = rtrim($datePart, 'T');
|
||
}
|
||
else {
|
||
$timePart = convertTimeFormat($timePart);
|
||
$dtValue = rtrim($datePart, 'T') . 'T' . unicodeTrim($timePart, 'T');
|
||
}
|
||
}
|
||
}
|
||
} else {
|
||
// Not using value-class (phew).
|
||
if ($dt->tagName == 'img' or $dt->tagName == 'area') {
|
||
// Use @alt
|
||
// Is it an entire dt?
|
||
$alt = $dt->getAttribute('alt');
|
||
if (!empty($alt))
|
||
$dtValue = $alt;
|
||
} elseif (in_array($dt->tagName, array('data'))) {
|
||
// Use @value, otherwise innertext
|
||
// Is it an entire dt?
|
||
$value = $dt->getAttribute('value');
|
||
if (!empty($value))
|
||
$dtValue = $value;
|
||
else
|
||
$dtValue = $dt->nodeValue;
|
||
} elseif ($dt->tagName == 'abbr') {
|
||
// Use @title, otherwise innertext
|
||
// Is it an entire dt?
|
||
$title = $dt->getAttribute('title');
|
||
if (!empty($title))
|
||
$dtValue = $title;
|
||
else
|
||
$dtValue = $dt->nodeValue;
|
||
} elseif ($dt->tagName == 'del' or $dt->tagName == 'ins' or $dt->tagName == 'time') {
|
||
// Use @datetime if available, otherwise innertext
|
||
// Is it an entire dt?
|
||
$dtAttr = $dt->getAttribute('datetime');
|
||
if (!empty($dtAttr))
|
||
$dtValue = $dtAttr;
|
||
else
|
||
$dtValue = $dt->nodeValue;
|
||
} else {
|
||
$dtValue = $dt->nodeValue;
|
||
}
|
||
|
||
if (preg_match('/(\d{4}-\d{2}-\d{2})/', $dtValue, $matches)) {
|
||
$dates[] = $matches[0];
|
||
}
|
||
}
|
||
|
||
/**
|
||
* if $dtValue is only a time and there are recently parsed dates,
|
||
* form the full date-time using the most recently parsed dt- value
|
||
*/
|
||
if ((preg_match('/^\d{1,2}:\d{1,2}(Z?[+|-]\d{2}:?\d{2})?/', $dtValue) or preg_match('/^\d{1,2}[a|p]m/', $dtValue)) && !empty($dates)) {
|
||
$dtValue = convertTimeFormat($dtValue);
|
||
$dtValue = end($dates) . 'T' . unicodeTrim($dtValue, 'T');
|
||
}
|
||
|
||
return $dtValue;
|
||
}
|
||
|
||
/**
|
||
* Given the root element of some embedded markup, return a string representing that markup
|
||
*
|
||
* @param DOMElement $e The element to parse
|
||
* @return string $e’s innerHTML
|
||
*
|
||
* @todo need to mark this element as e- parsed so it doesn’t get parsed as it’s parent’s e-* too
|
||
*/
|
||
public function parseE(\DOMElement $e) {
|
||
$classTitle = $this->parseValueClassTitle($e);
|
||
|
||
if ($classTitle !== null)
|
||
return $classTitle;
|
||
|
||
// Expand relative URLs within children of this element
|
||
// TODO: as it is this is not relative to only children, make this .// and rerun tests
|
||
$this->resolveChildUrls($e);
|
||
|
||
$html = '';
|
||
foreach ($e->childNodes as $node) {
|
||
$html .= $node->C14N();
|
||
}
|
||
|
||
return array(
|
||
'html' => $html,
|
||
'value' => unicodeTrim($this->textContent($e))
|
||
);
|
||
}
|
||
|
||
/**
|
||
* Recursively parse microformats
|
||
*
|
||
* @param DOMElement $e The element to parse
|
||
* @return array A representation of the values contained within microformat $e
|
||
*/
|
||
public function parseH(\DOMElement $e) {
|
||
// If it’s already been parsed (e.g. is a child mf), skip
|
||
if ($this->parsed->contains($e))
|
||
return null;
|
||
|
||
// Get current µf name
|
||
$mfTypes = mfNamesFromElement($e, 'h-');
|
||
|
||
// Initalise var to store the representation in
|
||
$return = array();
|
||
$children = array();
|
||
$dates = array();
|
||
|
||
// Handle nested microformats (h-*)
|
||
foreach ($this->xpath->query('.//*[contains(concat(" ", @class)," h-")]', $e) as $subMF) {
|
||
// Parse
|
||
$result = $this->parseH($subMF);
|
||
|
||
// If result was already parsed, skip it
|
||
if (null === $result)
|
||
continue;
|
||
|
||
// In most cases, the value attribute of the nested microformat should be the p- parsed value of the elemnt.
|
||
// The only times this is different is when the microformat is nested under certain prefixes, which are handled below.
|
||
$result['value'] = $this->parseP($subMF);
|
||
|
||
// Does this µf have any property names other than h-*?
|
||
$properties = nestedMfPropertyNamesFromElement($subMF);
|
||
|
||
if (!empty($properties)) {
|
||
// Yes! It’s a nested property µf
|
||
foreach ($properties as $property => $prefixes) {
|
||
// Note: handling microformat nesting under multiple conflicting prefixes is not currently specified by the mf2 parsing spec.
|
||
$prefixSpecificResult = $result;
|
||
if (in_array('p-', $prefixes)) {
|
||
$prefixSpecificResult['value'] = $prefixSpecificResult['properties']['name'][0];
|
||
} elseif (in_array('e-', $prefixes)) {
|
||
$eParsedResult = $this->parseE($subMF);
|
||
$prefixSpecificResult['html'] = $eParsedResult['html'];
|
||
$prefixSpecificResult['value'] = $eParsedResult['value'];
|
||
} elseif (in_array('u-', $prefixes)) {
|
||
$prefixSpecificResult['value'] = $this->parseU($subMF);
|
||
}
|
||
$return[$property][] = $prefixSpecificResult;
|
||
}
|
||
} else {
|
||
// No, it’s a child µf
|
||
$children[] = $result;
|
||
}
|
||
|
||
// Make sure this sub-mf won’t get parsed as a µf or property
|
||
// TODO: Determine if clearing this is required?
|
||
$this->elementPrefixParsed($subMF, 'h');
|
||
$this->elementPrefixParsed($subMF, 'p');
|
||
$this->elementPrefixParsed($subMF, 'u');
|
||
$this->elementPrefixParsed($subMF, 'dt');
|
||
$this->elementPrefixParsed($subMF, 'e');
|
||
}
|
||
|
||
if($e->tagName == 'area') {
|
||
$coords = $e->getAttribute('coords');
|
||
$shape = $e->getAttribute('shape');
|
||
}
|
||
|
||
// Handle p-*
|
||
foreach ($this->xpath->query('.//*[contains(concat(" ", @class) ," p-")]', $e) as $p) {
|
||
if ($this->isElementParsed($p, 'p'))
|
||
continue;
|
||
|
||
$pValue = $this->parseP($p);
|
||
|
||
// Add the value to the array for it’s p- properties
|
||
foreach (mfNamesFromElement($p, 'p-') as $propName) {
|
||
if (!empty($propName))
|
||
$return[$propName][] = $pValue;
|
||
}
|
||
|
||
// Make sure this sub-mf won’t get parsed as a top level mf
|
||
$this->elementPrefixParsed($p, 'p');
|
||
}
|
||
|
||
// Handle u-*
|
||
foreach ($this->xpath->query('.//*[contains(concat(" ", @class)," u-")]', $e) as $u) {
|
||
if ($this->isElementParsed($u, 'u'))
|
||
continue;
|
||
|
||
$uValue = $this->parseU($u);
|
||
|
||
// Add the value to the array for it’s property types
|
||
foreach (mfNamesFromElement($u, 'u-') as $propName) {
|
||
$return[$propName][] = $uValue;
|
||
}
|
||
|
||
// Make sure this sub-mf won’t get parsed as a top level mf
|
||
$this->elementPrefixParsed($u, 'u');
|
||
}
|
||
|
||
// Handle dt-*
|
||
foreach ($this->xpath->query('.//*[contains(concat(" ", @class), " dt-")]', $e) as $dt) {
|
||
if ($this->isElementParsed($dt, 'dt'))
|
||
continue;
|
||
|
||
$dtValue = $this->parseDT($dt, $dates);
|
||
|
||
if ($dtValue) {
|
||
// Add the value to the array for dt- properties
|
||
foreach (mfNamesFromElement($dt, 'dt-') as $propName) {
|
||
$return[$propName][] = $dtValue;
|
||
}
|
||
}
|
||
|
||
// Make sure this sub-mf won’t get parsed as a top level mf
|
||
$this->elementPrefixParsed($dt, 'dt');
|
||
}
|
||
|
||
// Handle e-*
|
||
foreach ($this->xpath->query('.//*[contains(concat(" ", @class)," e-")]', $e) as $em) {
|
||
if ($this->isElementParsed($em, 'e'))
|
||
continue;
|
||
|
||
$eValue = $this->parseE($em);
|
||
|
||
if ($eValue) {
|
||
// Add the value to the array for e- properties
|
||
foreach (mfNamesFromElement($em, 'e-') as $propName) {
|
||
$return[$propName][] = $eValue;
|
||
}
|
||
}
|
||
// Make sure this sub-mf won’t get parsed as a top level mf
|
||
$this->elementPrefixParsed($em, 'e');
|
||
}
|
||
|
||
// Implied Properties
|
||
// Check for p-name
|
||
if (!array_key_exists('name', $return)) {
|
||
try {
|
||
// Look for img @alt
|
||
if (($e->tagName == 'img' or $e->tagName == 'area') and $e->getAttribute('alt') != '')
|
||
throw new Exception($e->getAttribute('alt'));
|
||
|
||
if ($e->tagName == 'abbr' and $e->hasAttribute('title'))
|
||
throw new Exception($e->getAttribute('title'));
|
||
|
||
// Look for nested img @alt
|
||
foreach ($this->xpath->query('./img[count(preceding-sibling::*)+count(following-sibling::*)=0]', $e) as $em) {
|
||
$emNames = mfNamesFromElement($em, 'h-');
|
||
if (empty($emNames) && $em->getAttribute('alt') != '') {
|
||
throw new Exception($em->getAttribute('alt'));
|
||
}
|
||
}
|
||
|
||
// Look for nested area @alt
|
||
foreach ($this->xpath->query('./area[count(preceding-sibling::*)+count(following-sibling::*)=0]', $e) as $em) {
|
||
$emNames = mfNamesFromElement($em, 'h-');
|
||
if (empty($emNames) && $em->getAttribute('alt') != '') {
|
||
throw new Exception($em->getAttribute('alt'));
|
||
}
|
||
}
|
||
|
||
|
||
// Look for double nested img @alt
|
||
foreach ($this->xpath->query('./*[count(preceding-sibling::*)+count(following-sibling::*)=0]/img[count(preceding-sibling::*)+count(following-sibling::*)=0]', $e) as $em) {
|
||
$emNames = mfNamesFromElement($em, 'h-');
|
||
if (empty($emNames) && $em->getAttribute('alt') != '') {
|
||
throw new Exception($em->getAttribute('alt'));
|
||
}
|
||
}
|
||
|
||
// Look for double nested img @alt
|
||
foreach ($this->xpath->query('./*[count(preceding-sibling::*)+count(following-sibling::*)=0]/area[count(preceding-sibling::*)+count(following-sibling::*)=0]', $e) as $em) {
|
||
$emNames = mfNamesFromElement($em, 'h-');
|
||
if (empty($emNames) && $em->getAttribute('alt') != '') {
|
||
throw new Exception($em->getAttribute('alt'));
|
||
}
|
||
}
|
||
|
||
throw new Exception($e->nodeValue);
|
||
} catch (Exception $exc) {
|
||
$return['name'][] = unicodeTrim($exc->getMessage());
|
||
}
|
||
}
|
||
|
||
// Check for u-photo
|
||
if (!array_key_exists('photo', $return)) {
|
||
// Look for img @src
|
||
try {
|
||
if ($e->tagName == 'img')
|
||
throw new Exception($e->getAttribute('src'));
|
||
|
||
// Look for nested img @src
|
||
foreach ($this->xpath->query('./img[count(preceding-sibling::*)+count(following-sibling::*)=0]', $e) as $em) {
|
||
if ($em->getAttribute('src') != '')
|
||
throw new Exception($em->getAttribute('src'));
|
||
}
|
||
|
||
// Look for double nested img @src
|
||
foreach ($this->xpath->query('./*[count(preceding-sibling::*)+count(following-sibling::*)=0]/img[count(preceding-sibling::*)+count(following-sibling::*)=0]', $e) as $em) {
|
||
if ($em->getAttribute('src') != '')
|
||
throw new Exception($em->getAttribute('src'));
|
||
}
|
||
} catch (Exception $exc) {
|
||
$return['photo'][] = $this->resolveUrl($exc->getMessage());
|
||
}
|
||
}
|
||
|
||
// Check for u-url
|
||
if (!array_key_exists('url', $return)) {
|
||
// Look for img @src
|
||
if ($e->tagName == 'a' or $e->tagName == 'area')
|
||
$url = $e->getAttribute('href');
|
||
|
||
// Look for nested a @href
|
||
foreach ($this->xpath->query('./a[count(preceding-sibling::a)+count(following-sibling::a)=0]', $e) as $em) {
|
||
$emNames = mfNamesFromElement($em, 'h-');
|
||
if (empty($emNames)) {
|
||
$url = $em->getAttribute('href');
|
||
break;
|
||
}
|
||
}
|
||
|
||
// Look for nested area @src
|
||
foreach ($this->xpath->query('./area[count(preceding-sibling::area)+count(following-sibling::area)=0]', $e) as $em) {
|
||
$emNames = mfNamesFromElement($em, 'h-');
|
||
if (empty($emNames)) {
|
||
$url = $em->getAttribute('href');
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (!empty($url))
|
||
$return['url'][] = $this->resolveUrl($url);
|
||
}
|
||
|
||
// Make sure things are in alphabetical order
|
||
sort($mfTypes);
|
||
|
||
// Phew. Return the final result.
|
||
$parsed = array(
|
||
'type' => $mfTypes,
|
||
'properties' => $return
|
||
);
|
||
|
||
if (!empty($shape)) {
|
||
$parsed['shape'] = $shape;
|
||
}
|
||
|
||
if (!empty($coords)) {
|
||
$parsed['coords'] = $coords;
|
||
}
|
||
|
||
if (!empty($children)) {
|
||
$parsed['children'] = array_values(array_filter($children));
|
||
}
|
||
return $parsed;
|
||
}
|
||
|
||
/**
|
||
* Parse Rels and Alternatives
|
||
*
|
||
* Returns [$rels, $alternatives]. If the $rels value is to be empty, i.e. there are no links on the page
|
||
* with a rel value *not* containing `alternate`, then the type of $rels depends on $this->jsonMode. If set
|
||
* to true, it will be a stdClass instance, optimising for JSON serialisation. Otherwise (the default case),
|
||
* it will be an empty array.
|
||
*/
|
||
public function parseRelsAndAlternates() {
|
||
$rels = array();
|
||
$alternates = array();
|
||
|
||
// Iterate through all a, area and link elements with rel attributes
|
||
foreach ($this->xpath->query('//*[@rel and @href]') as $hyperlink) {
|
||
if ($hyperlink->getAttribute('rel') == '')
|
||
continue;
|
||
|
||
// Resolve the href
|
||
$href = $this->resolveUrl($hyperlink->getAttribute('href'));
|
||
|
||
// Split up the rel into space-separated values
|
||
$linkRels = array_filter(explode(' ', $hyperlink->getAttribute('rel')));
|
||
|
||
// If alternate in rels, create alternate structure, append
|
||
if (in_array('alternate', $linkRels)) {
|
||
$alt = array(
|
||
'url' => $href,
|
||
'rel' => implode(' ', array_diff($linkRels, array('alternate')))
|
||
);
|
||
if ($hyperlink->hasAttribute('media'))
|
||
$alt['media'] = $hyperlink->getAttribute('media');
|
||
|
||
if ($hyperlink->hasAttribute('hreflang'))
|
||
$alt['hreflang'] = $hyperlink->getAttribute('hreflang');
|
||
|
||
if ($hyperlink->hasAttribute('title'))
|
||
$alt['title'] = $hyperlink->getAttribute('title');
|
||
|
||
if ($hyperlink->hasAttribute('type'))
|
||
$alt['type'] = $hyperlink->getAttribute('type');
|
||
|
||
if ($hyperlink->nodeValue)
|
||
$alt['text'] = $hyperlink->nodeValue;
|
||
|
||
$alternates[] = $alt;
|
||
} else {
|
||
foreach ($linkRels as $rel) {
|
||
$rels[$rel][] = $href;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (empty($rels) and $this->jsonMode) {
|
||
$rels = new stdClass();
|
||
}
|
||
|
||
return array($rels, $alternates);
|
||
}
|
||
|
||
/**
|
||
* Kicks off the parsing routine
|
||
*
|
||
* If `$htmlSafe` is set, any angle brackets in the results from non e-* properties
|
||
* will be HTML-encoded, bringing all output to the same level of encoding.
|
||
*
|
||
* If a DOMElement is set as the $context, only descendants of that element will
|
||
* be parsed for microformats.
|
||
*
|
||
* @param bool $htmlSafe whether or not to html-encode non e-* properties. Defaults to false
|
||
* @param DOMElement $context optionally an element from which to parse microformats
|
||
* @return array An array containing all the µfs found in the current document
|
||
*/
|
||
public function parse($convertClassic = true, DOMElement $context = null) {
|
||
$mfs = array();
|
||
|
||
if ($convertClassic) {
|
||
$this->convertLegacy();
|
||
}
|
||
|
||
$mfElements = null === $context
|
||
? $this->xpath->query('//*[contains(concat(" ", @class), " h-")]')
|
||
: $this->xpath->query('.//*[contains(concat(" ", @class), " h-")]', $context);
|
||
|
||
// Parser microformats
|
||
foreach ($mfElements as $node) {
|
||
// For each microformat
|
||
$result = $this->parseH($node);
|
||
|
||
// Add the value to the array for this property type
|
||
$mfs[] = $result;
|
||
}
|
||
|
||
// Parse rels
|
||
list($rels, $alternates) = $this->parseRelsAndAlternates();
|
||
|
||
$top = array(
|
||
'items' => array_values(array_filter($mfs)),
|
||
'rels' => $rels
|
||
);
|
||
|
||
if (count($alternates))
|
||
$top['alternates'] = $alternates;
|
||
|
||
return $top;
|
||
}
|
||
|
||
/**
|
||
* Parse From ID
|
||
*
|
||
* Given an ID, parse all microformats which are children of the element with
|
||
* that ID.
|
||
*
|
||
* Note that rel values are still document-wide.
|
||
*
|
||
* If an element with the ID is not found, an empty skeleton mf2 array structure
|
||
* will be returned.
|
||
*
|
||
* @param string $id
|
||
* @param bool $htmlSafe = false whether or not to HTML-encode angle brackets in non e-* properties
|
||
* @return array
|
||
*/
|
||
public function parseFromId($id, $convertClassic=true) {
|
||
$matches = $this->xpath->query("//*[@id='{$id}']");
|
||
|
||
if (empty($matches))
|
||
return array('items' => array(), 'rels' => array(), 'alternates' => array());
|
||
|
||
return $this->parse($convertClassic, $matches->item(0));
|
||
}
|
||
|
||
/**
|
||
* Convert Legacy Classnames
|
||
*
|
||
* Adds microformats2 classnames into a document containing only legacy
|
||
* semantic classnames.
|
||
*
|
||
* @return Parser $this
|
||
*/
|
||
public function convertLegacy() {
|
||
$doc = $this->doc;
|
||
$xp = new DOMXPath($doc);
|
||
|
||
// replace all roots
|
||
foreach ($this->classicRootMap as $old => $new) {
|
||
foreach ($xp->query('//*[contains(concat(" ", @class, " "), " ' . $old . ' ") and not(contains(concat(" ", @class, " "), " ' . $new . ' "))]') as $el) {
|
||
$el->setAttribute('class', $el->getAttribute('class') . ' ' . $new);
|
||
}
|
||
}
|
||
|
||
foreach ($this->classicPropertyMap as $oldRoot => $properties) {
|
||
$newRoot = $this->classicRootMap[$oldRoot];
|
||
foreach ($properties as $old => $new) {
|
||
foreach ($xp->query('//*[contains(concat(" ", @class, " "), " ' . $oldRoot . ' ")]//*[contains(concat(" ", @class, " "), " ' . $old . ' ") and not(contains(concat(" ", @class, " "), " ' . $new . ' "))]') as $el) {
|
||
$el->setAttribute('class', $el->getAttribute('class') . ' ' . $new);
|
||
}
|
||
}
|
||
}
|
||
|
||
return $this;
|
||
}
|
||
|
||
/**
|
||
* XPath Query
|
||
*
|
||
* Runs an XPath query over the current document. Works in exactly the same
|
||
* way as DOMXPath::query.
|
||
*
|
||
* @param string $expression
|
||
* @param DOMNode $context
|
||
* @return DOMNodeList
|
||
*/
|
||
public function query($expression, $context = null) {
|
||
return $this->xpath->query($expression, $context);
|
||
}
|
||
|
||
/**
|
||
* Classic Root Classname map
|
||
*/
|
||
public $classicRootMap = array(
|
||
'vcard' => 'h-card',
|
||
'hfeed' => 'h-feed',
|
||
'hentry' => 'h-entry',
|
||
'hrecipe' => 'h-recipe',
|
||
'hresume' => 'h-resume',
|
||
'vevent' => 'h-event',
|
||
'hreview' => 'h-review',
|
||
'hproduct' => 'h-product'
|
||
);
|
||
|
||
public $classicPropertyMap = array(
|
||
'vcard' => array(
|
||
'fn' => 'p-name',
|
||
'url' => 'u-url',
|
||
'honorific-prefix' => 'p-honorific-prefix',
|
||
'given-name' => 'p-given-name',
|
||
'additional-name' => 'p-additional-name',
|
||
'family-name' => 'p-family-name',
|
||
'honorific-suffix' => 'p-honorific-suffix',
|
||
'nickname' => 'p-nickname',
|
||
'email' => 'u-email',
|
||
'logo' => 'u-logo',
|
||
'photo' => 'u-photo',
|
||
'url' => 'u-url',
|
||
'uid' => 'u-uid',
|
||
'category' => 'p-category',
|
||
'adr' => 'p-adr h-adr',
|
||
'extended-address' => 'p-extended-address',
|
||
'street-address' => 'p-street-address',
|
||
'locality' => 'p-locality',
|
||
'region' => 'p-region',
|
||
'postal-code' => 'p-postal-code',
|
||
'country-name' => 'p-country-name',
|
||
'label' => 'p-label',
|
||
'geo' => 'p-geo h-geo',
|
||
'latitude' => 'p-latitude',
|
||
'longitude' => 'p-longitude',
|
||
'tel' => 'p-tel',
|
||
'note' => 'p-note',
|
||
'bday' => 'dt-bday',
|
||
'key' => 'u-key',
|
||
'org' => 'p-org',
|
||
'organization-name' => 'p-organization-name',
|
||
'organization-unit' => 'p-organization-unit',
|
||
),
|
||
'hentry' => array(
|
||
'entry-title' => 'p-name',
|
||
'entry-summary' => 'p-summary',
|
||
'entry-content' => 'e-content',
|
||
'published' => 'dt-published',
|
||
'updated' => 'dt-updated',
|
||
'author' => 'p-author h-card',
|
||
'category' => 'p-category',
|
||
'geo' => 'p-geo h-geo',
|
||
'latitude' => 'p-latitude',
|
||
'longitude' => 'p-longitude',
|
||
),
|
||
'hrecipe' => array(
|
||
'fn' => 'p-name',
|
||
'ingredient' => 'p-ingredient',
|
||
'yield' => 'p-yield',
|
||
'instructions' => 'e-instructions',
|
||
'duration' => 'dt-duration',
|
||
'nutrition' => 'p-nutrition',
|
||
'photo' => 'u-photo',
|
||
'summary' => 'p-summary',
|
||
'author' => 'p-author h-card'
|
||
),
|
||
'hresume' => array(
|
||
'summary' => 'p-summary',
|
||
'contact' => 'h-card p-contact',
|
||
'education' => 'h-event p-education',
|
||
'experience' => 'h-event p-experience',
|
||
'skill' => 'p-skill',
|
||
'affiliation' => 'p-affiliation h-card',
|
||
),
|
||
'vevent' => array(
|
||
'dtstart' => 'dt-start',
|
||
'dtend' => 'dt-end',
|
||
'duration' => 'dt-duration',
|
||
'description' => 'p-description',
|
||
'summary' => 'p-summary',
|
||
'description' => 'p-description',
|
||
'url' => 'u-url',
|
||
'category' => 'p-category',
|
||
'location' => 'h-card',
|
||
'geo' => 'p-location h-geo'
|
||
),
|
||
'hreview' => array(
|
||
'summary' => 'p-name',
|
||
'fn' => 'p-item h-item p-name', // doesn’t work properly, see spec
|
||
'photo' => 'u-photo', // of the item being reviewed (p-item h-item u-photo)
|
||
'url' => 'u-url', // of the item being reviewed (p-item h-item u-url)
|
||
'reviewer' => 'p-reviewer p-author h-card',
|
||
'dtreviewed' => 'dt-reviewed',
|
||
'rating' => 'p-rating',
|
||
'best' => 'p-best',
|
||
'worst' => 'p-worst',
|
||
'description' => 'p-description'
|
||
),
|
||
'hproduct' => array(
|
||
'fn' => 'p-name',
|
||
'photo' => 'u-photo',
|
||
'brand' => 'p-brand',
|
||
'category' => 'p-category',
|
||
'description' => 'p-description',
|
||
'identifier' => 'u-identifier',
|
||
'url' => 'u-url',
|
||
'review' => 'p-review h-review',
|
||
'price' => 'p-price'
|
||
)
|
||
);
|
||
}
|
||
|
||
function parseUriToComponents($uri) {
|
||
$result = array(
|
||
'scheme' => null,
|
||
'authority' => null,
|
||
'path' => null,
|
||
'query' => null,
|
||
'fragment' => null
|
||
);
|
||
|
||
$u = @parse_url($uri);
|
||
|
||
if(array_key_exists('scheme', $u))
|
||
$result['scheme'] = $u['scheme'];
|
||
|
||
if(array_key_exists('host', $u)) {
|
||
if(array_key_exists('user', $u))
|
||
$result['authority'] = $u['user'];
|
||
if(array_key_exists('pass', $u))
|
||
$result['authority'] .= ':' . $u['pass'];
|
||
if(array_key_exists('user', $u) || array_key_exists('pass', $u))
|
||
$result['authority'] .= '@';
|
||
$result['authority'] .= $u['host'];
|
||
if(array_key_exists('port', $u))
|
||
$result['authority'] .= ':' . $u['port'];
|
||
}
|
||
|
||
if(array_key_exists('path', $u))
|
||
$result['path'] = $u['path'];
|
||
|
||
if(array_key_exists('query', $u))
|
||
$result['query'] = $u['query'];
|
||
|
||
if(array_key_exists('fragment', $u))
|
||
$result['fragment'] = $u['fragment'];
|
||
|
||
return $result;
|
||
}
|
||
|
||
function resolveUrl($baseURI, $referenceURI) {
|
||
$target = array(
|
||
'scheme' => null,
|
||
'authority' => null,
|
||
'path' => null,
|
||
'query' => null,
|
||
'fragment' => null
|
||
);
|
||
|
||
# 5.2.1 Pre-parse the Base URI
|
||
# The base URI (Base) is established according to the procedure of
|
||
# Section 5.1 and parsed into the five main components described in
|
||
# Section 3
|
||
$base = parseUriToComponents($baseURI);
|
||
|
||
# If base path is blank (http://example.com) then set it to /
|
||
# (I can't tell if this is actually in the RFC or not, but seems like it makes sense)
|
||
if($base['path'] == null)
|
||
$base['path'] = '/';
|
||
|
||
# 5.2.2. Transform References
|
||
|
||
# The URI reference is parsed into the five URI components
|
||
# (R.scheme, R.authority, R.path, R.query, R.fragment) = parse(R);
|
||
$reference = parseUriToComponents($referenceURI);
|
||
|
||
# A non-strict parser may ignore a scheme in the reference
|
||
# if it is identical to the base URI's scheme.
|
||
# TODO
|
||
|
||
if($reference['scheme']) {
|
||
$target['scheme'] = $reference['scheme'];
|
||
$target['authority'] = $reference['authority'];
|
||
$target['path'] = removeDotSegments($reference['path']);
|
||
$target['query'] = $reference['query'];
|
||
} else {
|
||
if($reference['authority']) {
|
||
$target['authority'] = $reference['authority'];
|
||
$target['path'] = removeDotSegments($reference['path']);
|
||
$target['query'] = $reference['query'];
|
||
} else {
|
||
if($reference['path'] == '') {
|
||
$target['path'] = $base['path'];
|
||
if($reference['query']) {
|
||
$target['query'] = $reference['query'];
|
||
} else {
|
||
$target['query'] = $base['query'];
|
||
}
|
||
} else {
|
||
if(substr($reference['path'], 0, 1) == '/') {
|
||
$target['path'] = removeDotSegments($reference['path']);
|
||
} else {
|
||
$target['path'] = mergePaths($base, $reference);
|
||
$target['path'] = removeDotSegments($target['path']);
|
||
}
|
||
$target['query'] = $reference['query'];
|
||
}
|
||
$target['authority'] = $base['authority'];
|
||
}
|
||
$target['scheme'] = $base['scheme'];
|
||
}
|
||
$target['fragment'] = $reference['fragment'];
|
||
|
||
# 5.3 Component Recomposition
|
||
$result = '';
|
||
if($target['scheme']) {
|
||
$result .= $target['scheme'] . ':';
|
||
}
|
||
if($target['authority']) {
|
||
$result .= '//' . $target['authority'];
|
||
}
|
||
$result .= $target['path'];
|
||
if($target['query']) {
|
||
$result .= '?' . $target['query'];
|
||
}
|
||
if($target['fragment']) {
|
||
$result .= '#' . $target['fragment'];
|
||
} elseif($referenceURI == '#') {
|
||
$result .= '#';
|
||
}
|
||
return $result;
|
||
}
|
||
|
||
# 5.2.3 Merge Paths
|
||
function mergePaths($base, $reference) {
|
||
# If the base URI has a defined authority component and an empty
|
||
# path,
|
||
if($base['authority'] && $base['path'] == null) {
|
||
# then return a string consisting of "/" concatenated with the
|
||
# reference's path; otherwise,
|
||
$merged = '/' . $reference['path'];
|
||
} else {
|
||
if(($pos=strrpos($base['path'], '/')) !== false) {
|
||
# return a string consisting of the reference's path component
|
||
# appended to all but the last segment of the base URI's path (i.e.,
|
||
# excluding any characters after the right-most "/" in the base URI
|
||
# path,
|
||
$merged = substr($base['path'], 0, $pos + 1) . $reference['path'];
|
||
} else {
|
||
# or excluding the entire base URI path if it does not contain
|
||
# any "/" characters).
|
||
$merged = $base['path'];
|
||
}
|
||
}
|
||
return $merged;
|
||
}
|
||
|
||
# 5.2.4.A Remove leading ../ or ./
|
||
function removeLeadingDotSlash(&$input) {
|
||
if(substr($input, 0, 3) == '../') {
|
||
$input = substr($input, 3);
|
||
} elseif(substr($input, 0, 2) == './') {
|
||
$input = substr($input, 2);
|
||
}
|
||
}
|
||
|
||
# 5.2.4.B Replace leading /. with /
|
||
function removeLeadingSlashDot(&$input) {
|
||
if(substr($input, 0, 3) == '/./') {
|
||
$input = '/' . substr($input, 3);
|
||
} else {
|
||
$input = '/' . substr($input, 2);
|
||
}
|
||
}
|
||
|
||
# 5.2.4.C Given leading /../ remove component from output buffer
|
||
function removeOneDirLevel(&$input, &$output) {
|
||
if(substr($input, 0, 4) == '/../') {
|
||
$input = '/' . substr($input, 4);
|
||
} else {
|
||
$input = '/' . substr($input, 3);
|
||
}
|
||
$output = substr($output, 0, strrpos($output, '/'));
|
||
}
|
||
|
||
# 5.2.4.D Remove . and .. if it's the only thing in the input
|
||
function removeLoneDotDot(&$input) {
|
||
if($input == '.') {
|
||
$input = substr($input, 1);
|
||
} else {
|
||
$input = substr($input, 2);
|
||
}
|
||
}
|
||
|
||
# 5.2.4.E Move one segment from input to output
|
||
function moveOneSegmentFromInput(&$input, &$output) {
|
||
if(substr($input, 0, 1) != '/') {
|
||
$pos = strpos($input, '/');
|
||
} else {
|
||
$pos = strpos($input, '/', 1);
|
||
}
|
||
|
||
if($pos === false) {
|
||
$output .= $input;
|
||
$input = '';
|
||
} else {
|
||
$output .= substr($input, 0, $pos);
|
||
$input = substr($input, $pos);
|
||
}
|
||
}
|
||
|
||
# 5.2.4 Remove Dot Segments
|
||
function removeDotSegments($path) {
|
||
# 1. The input buffer is initialized with the now-appended path
|
||
# components and the output buffer is initialized to the empty
|
||
# string.
|
||
$input = $path;
|
||
$output = '';
|
||
|
||
$step = 0;
|
||
|
||
# 2. While the input buffer is not empty, loop as follows:
|
||
while($input) {
|
||
$step++;
|
||
|
||
if(substr($input, 0, 3) == '../' || substr($input, 0, 2) == './') {
|
||
# A. If the input buffer begins with a prefix of "../" or "./",
|
||
# then remove that prefix from the input buffer; otherwise,
|
||
removeLeadingDotSlash($input);
|
||
} elseif(substr($input, 0, 3) == '/./' || $input == '/.') {
|
||
# B. if the input buffer begins with a prefix of "/./" or "/.",
|
||
# where "." is a complete path segment, then replace that
|
||
# prefix with "/" in the input buffer; otherwise,
|
||
removeLeadingSlashDot($input);
|
||
} elseif(substr($input, 0, 4) == '/../' || $input == '/..') {
|
||
# C. if the input buffer begins with a prefix of "/../" or "/..",
|
||
# where ".." is a complete path segment, then replace that
|
||
# prefix with "/" in the input buffer and remove the last
|
||
# segment and its preceding "/" (if any) from the output
|
||
# buffer; otherwise,
|
||
removeOneDirLevel($input, $output);
|
||
} elseif($input == '.' || $input == '..') {
|
||
# D. if the input buffer consists only of "." or "..", then remove
|
||
# that from the input buffer; otherwise,
|
||
removeLoneDotDot($input);
|
||
} else {
|
||
# E. move the first path segment in the input buffer to the end of
|
||
# the output buffer and any subsequent characters up to, but not including,
|
||
# the next "/" character or the end of the input buffer
|
||
moveOneSegmentFromInput($input, $output);
|
||
}
|
||
}
|
||
|
||
return $output;
|
||
}
|