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138 lines
3.8 KiB
138 lines
3.8 KiB
<?php
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namespace Percolator\Formats;
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class Mf2 {
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public static function parse($mf2) {
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$data = [
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'type' => 'entry',
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'author' => [
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'type' => 'card',
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'name' => null,
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'url' => null,
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'photo' => null
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]
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];
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if($item = $mf2['items'][0]) {
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if(in_array('h-entry', $item['type'])) {
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// Single plaintext values
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$properties = ['url','published','summary','rsvp'];
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foreach($properties as $p) {
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if($v = self::getPlaintext($item, $p))
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$data[$p] = $v;
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}
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// Always arrays
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$properties = ['photo','video','syndication','in-reply-to','like-of','repost-of'];
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foreach($properties as $p) {
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if(array_key_exists($p, $item['properties']))
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$data[$p] = $item['properties'][$p];
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}
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// Determine if the name is distinct from the content
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$name = self::getPlaintext($item, 'name');
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$content = null;
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$textContent = null;
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$htmlContent = null;
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if(array_key_exists('content', $item['properties'])) {
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$content = $item['properties']['content'][0];
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if(is_string($content)) {
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$textContent = $content;
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} elseif(!is_string($content) && is_array($content) && array_key_exists('value', $content)) {
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if(array_key_exists('html', $content)) {
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$textContent = strip_tags($content['html']);
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$htmlContent = $content['html'];
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} else {
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$textContent = $content['value'];
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}
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}
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// Trim ellipses from the name
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$name = preg_replace('/ ?(\.\.\.|…)$/', '', $name);
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// Check if the name is a prefix of the content
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if(strpos($textContent, $name) === 0) {
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$name = null;
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}
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}
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if($name) {
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$data['name'] = $name;
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}
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if($content) {
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$data['content'] = [
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'text' => $textContent
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];
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if($textContent != $htmlContent) {
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$data['content']['html'] = $htmlContent;
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}
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}
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return $data;
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}
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}
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return false;
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}
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private static function responseDisplayText($name, $summary, $content) {
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// Build a fake h-entry to pass to the comments parser
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$input = [
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'type' => ['h-entry'],
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'properties' => [
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'name' => [trim($name)],
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'summary' => [trim($summary)],
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'content' => [trim($content)]
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]
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];
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if(!trim($name))
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unset($input['properties']['name']);
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if(!trim($summary))
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unset($input['properties']['summary']);
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$result = \IndieWeb\comments\parse($input, false, 1024, 4);
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return [
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'name' => trim($result['name']),
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'content' => $result['text']
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];
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}
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private static function hasNumericKeys(array $arr) {
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foreach($arr as $key=>$val)
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if (is_numeric($key))
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return true;
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return false;
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}
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private static function isMicroformat($mf) {
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return is_array($mf)
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and !self::hasNumericKeys($mf)
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and !empty($mf['type'])
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and isset($mf['properties']);
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}
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// Given an array of microformats properties and a key name, return the plaintext value
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// at that property
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// e.g.
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// {"properties":{"published":["foo"]}} results in "foo"
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private static function getPlaintext($mf2, $k, $fallback=null) {
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if(!empty($mf2['properties'][$k]) and is_array($mf2['properties'][$k])) {
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// $mf2['properties'][$v] will always be an array since the input was from the mf2 parser
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$value = $mf2['properties'][$k][0];
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if(is_string($value)) {
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return $value;
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} elseif(self::isMicroformat($value) && array_key_exists('value', $value)) {
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return $value['value'];
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}
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}
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return $fallback;
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}
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}
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