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Removed procedural implementation

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This commit is contained in:
Yusuf Kandemir 2018-11-10 15:11:39 +03:00
parent 880d3d8346
commit b3edcd23a4
1 changed files with 0 additions and 272 deletions
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src/procedures.php
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@ -1,272 +0,0 @@
<?php
// Microdata Extractor
function extractMicrodata(DOMNodeList $topLevelItems)
{
// Step 1
$result = new stdClass;
// Step 2
$items = [];
// Step 3
// items = map("top-level microdata items", item => getObject(item))
$items = array_map('getObject', iterator_to_array($topLevelItems));
/*foreach ($topLevelItems as $topLevelItem) {
$items[] = getObject($topLevelItem);
}*/
// Step 4
$result->items = $items;
// Step 5
return $result;
}
// Get Object
function getObject(DOMElement $item, $memory = [])
{
// Step 1
$result = new stdClass();
// Step 2 in 2nd parameter of this function
// $memory = [];
// Step 3
$memory[] = $item;
// Step 4
$itemtype = $item->getAttribute('itemtype');
$result->type = $itemtype ? preg_split('/\s+/', $itemtype) : [];
// @todo Check if types are valid absolute urls
// Step 5
if ($itemId = $item->getAttribute('itemid')) {
$result->id = $itemId;
}
// @todo Check if item ids are valid absolute urls or like isbn:xxx
// Step 6
$properties = new stdClass;
// Step 7
foreach (getProperties($item) as $element) {
$value = getPropertyValue($element);
if (isItem($value)) {
foreach ($memory as $memory_item) {
if ($element->isSameNode($memory_item)) {
$value = 'ERROR';
}
}
if ($value != 'ERROR') {
$value = getObject($value, $memory);
}
}
foreach (getPropertyNames($element) as $name) {
$properties->{$name}[] = $value;
}
}
// Step 8
$result->properties = $properties;
// Step 9
return $result;
}
// https://www.w3.org/TR/microdata/#dfn-property-name
function getPropertyNames(DOMElement $item)
{
// Step 1
$itemprop = $item->getAttribute('itemprop');
$tokens = $itemprop ? preg_split('/\s+/', $itemprop) : [];
// Step 2
$properties = [];
// Step 3
foreach ($tokens as $token) {
if (isAbsoluteUri($token)) {
$properties[] = $token;
} elseif (isTypedItem($item)) {
$properties[] = /*$vocabularyIdentifier . */ $token;
} else {
$properties[] = $token;
}
}
$properties = array_unique($properties);
return $properties;
}
// https://www.w3.org/TR/microdata/#dfn-item-properties
function getProperties(DOMElement $root)
{
// Step 1
$results = [];
$memory = [];
$pending = [];
// Step 2
$memory[] = $root;
// Step 3
if ($root->hasChildNodes()) {
$childNodes = iterator_to_array($root->childNodes);
$childNodes = array_filter($childNodes, function ($node) {
return $node instanceof DOMElement;
}); // Get only DOMElements
$pending = array_merge($pending, $childNodes);
}
// Step 4
if ($root->hasAttribute('itemref')) {
$tokens = preg_split('/\s+/', $root->getAttribute('itemref'));
foreach ($tokens as $token) {
// @todo Implement xpath query and get the first item
}
}
// Step 5
while ($pending) {
// Step 6
$current = array_pop($pending);
// Step 7
// in_array can't compare objects
/*if (in_array($current, $memory)) {
// There is MicrodataError
continue;
}*/
$error = false;
foreach ($memory as $memory_item) {
if ($current->isSameNode($memory_item)) {
// There is MicrodataError
$error = true;
break;
}
}
if ($error) {
continue;
}
// Step 8
$memory[] = $current;
// Step 9
if (! $current->hasAttribute('itemscope')) {
if ($current->hasChildNodes()) {
$childNodes = iterator_to_array($current->childNodes);
$childNodes = array_filter($childNodes, function ($node) {
return $node instanceof DOMElement;
});
$pending = array_merge($pending, $childNodes);
}
}
// Step 10
if ($current->hasAttribute('itemprop') && /* hasPropertyNames */ getPropertyNames($current)) {
$results[] = $current;
}
// Step 11: Return to loop
}
// Step 12: End of loop. Sort results in tree order.
$results = array_reverse($results);
// Step 13
return $results;
}
// https://www.w3.org/TR/microdata/#dfn-property-value
function getPropertyValue(DOMElement $item)
{
if ($item->hasAttribute('itemscope')) {
return $item;
}
if ($item->hasAttribute('content')) {
return $item->getAttribute('content');
}
$base = $item->ownerDocument->documentURI;
switch ($item->tagName) {
case 'audio':
case 'embed':
case 'iframe':
case 'img':
case 'source':
case 'track':
case 'video':
if ($item->hasAttribute('src')) {
$result = $item->getAttribute('src');
// @todo check against protocol relative urls like "//example.com/test.jpg"
return isAbsoluteUri($result) ? $result : $base.$result;
}
case 'a':
case 'area':
case 'link':
if ($item->hasAttribute('href')) {
$result = $item->getAttribute('href');
return isAbsoluteUri($result) ? $result : $base.$result;
}
case 'object':
if ($item->hasAttribute('data')) {
$result = $item->getAttribute('data');
return isAbsoluteUri($result) ? $result : $base.$result;
}
case 'data':
case 'meter':
if ($item->hasAttribute('value')) {
return $item->getAttribute('value');
}
case 'time':
if ($item->hasAttribute('datetime')) {
return $item->getAttribute('datetime');
}
default:
return $item->textContent;
}
}
function isItem($element)
{
return $element instanceof DOMElement && $element->hasAttribute('itemscope');
}
function isTypedItem(DOMElement $item)
{
$tokens = [];
if ($item->hasAttribute('itemtype')) {
$tokens = preg_split("/\s+/", $item->getAttribute('itemtype'));
}
return !empty($tokens);
}
function isAbsoluteUri(string $uri)
{
return preg_match("/^\w+:/", trim($uri));
}