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Add generic function for generating metadata JSON

pull/48/head
Paal Joergensen 2018-09-17 13:44:42 +02:00
parent 2bf38c5b00
commit c9cb23e06c
1 changed files with 22 additions and 0 deletions
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22
h5p-metadata.class.php
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@ -43,6 +43,28 @@ abstract class H5PMetadata {
)
);
/**
* JSON encode metadata
*
* @param object $content
* @return string
*/
public static function toJSON($content) {
// Note: deliberatly creating JSON string "manually" to improve performance
return
'{"title":' . (isset($content->title) ? json_encode($content->title) : 'null') .
',"authors":' . (isset($content->authors) ? $content->authors : 'null') .
',"source":' . (isset($content->source) ? '"' . $content->source . '"' : 'null') .
',"license":' . (isset($content->license) ? '"' . $content->license . '"' : 'null') .
',"licenseVersion":' . (isset($content->license_version) ? '"' . $content->license_version . '"' : 'null') .
',"licenseExtras":' . (isset($content->license_extras) ? json_encode($content->license_extras) : 'null') .
',"yearFrom":' . (isset($content->year_from) ? $content->year_from : 'null') .
',"yearTo":' . (isset($content->year_to) ? $content->year_to : 'null') .
',"changes":' . (isset($content->changes) ? $content->changes : 'null') .
',"authorComments":' . (isset($content->author_comments) ? json_encode($content->author_comments) : 'null') . '}';
}
/**
* Make the metadata into an associative array keyed by the property names
* @param mixed $metadata Array or object containing metadata