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<?php
/**
* This is a data layer which uses the file system so it isn't specific to any framework.
*/
class H5PDevelopment {
const MODE_NONE = 0;
const MODE_CONTENT = 1;
const MODE_LIBRARY = 2;
private $h5pF, $libraries, $language, $filesPath;
/**
* Constructor.
*
* @param H5PFrameworkInterface|object $H5PFramework
* The frameworks implementation of the H5PFrameworkInterface
* @param string $filesPath
* Path to where H5P should store its files
* @param $language
* @param array $libraries Optional cache input.
*/
public function __construct(H5PFrameworkInterface $H5PFramework, $filesPath, $language, $libraries = NULL) {
$this->h5pF = $H5PFramework;
$this->language = $language;
$this->filesPath = $filesPath;
if ($libraries !== NULL) {
$this->libraries = $libraries;
}
else {
$this->findLibraries($filesPath . '/development');
}
}
/**
* Get contents of file.
*
* @param string $file File path.
* @return mixed String on success or NULL on failure.
*/
private function getFileContents($file) {
if (file_exists($file) === FALSE) {
return NULL;
}
$contents = file_get_contents($file);
if ($contents === FALSE) {
return NULL;
}
return $contents;
}
/**
* Scans development directory and find all libraries.
*
* @param string $path Libraries development folder
*/
private function findLibraries($path) {
$this->libraries = array();
if (is_dir($path) === FALSE) {
return;
}
$contents = scandir($path);
for ($i = 0, $s = count($contents); $i < $s; $i++) {
if ($contents[$i][0] === '.') {
continue; // Skip hidden stuff.
}
$libraryPath = $path . '/' . $contents[$i];
$libraryJSON = $this->getFileContents($libraryPath . '/library.json');
if ($libraryJSON === NULL) {
continue; // No JSON file, skip.
}
$library = json_decode($libraryJSON, TRUE);
if ($library === NULL) {
continue; // Invalid JSON.
}
// TODO: Validate props? Not really needed, is it? this is a dev site.
$library['libraryId'] = $this->h5pF->getLibraryId($library['machineName'], $library['majorVersion'], $library['minorVersion']);
// Convert metadataSettings values to boolean & json_encode it before saving
$library['metadataSettings'] = isset($library['metadataSettings']) ?
H5PMetadata::boolifyAndEncodeSettings($library['metadataSettings']) :
NULL;
// Save/update library.
$this->h5pF->saveLibraryData($library, $library['libraryId'] === FALSE);
// Need to decode it again, since it is served from here.
$library['metadataSettings'] = isset($library['metadataSettings'])
? json_decode($library['metadataSettings'])
: NULL;
$library['path'] = 'development/' . $contents[$i];
$this->libraries[H5PDevelopment::libraryToString($library['machineName'], $library['majorVersion'], $library['minorVersion'])] = $library;
}
// TODO: Should we remove libraries without files? Not really needed, but must be cleaned up some time, right?
// Go trough libraries and insert dependencies. Missing deps. will just be ignored and not available. (I guess?!)
$this->h5pF->lockDependencyStorage();
foreach ($this->libraries as $library) {
$this->h5pF->deleteLibraryDependencies($library['libraryId']);
// This isn't optimal, but without it we would get duplicate warnings.
// TODO: You might get PDOExceptions if two or more requests does this at the same time!!
$types = array('preloaded', 'dynamic', 'editor');
foreach ($types as $type) {
if (isset($library[$type . 'Dependencies'])) {
$this->h5pF->saveLibraryDependencies($library['libraryId'], $library[$type . 'Dependencies'], $type);
}
}
}
$this->h5pF->unlockDependencyStorage();
// TODO: Deps must be inserted into h5p_nodes_libraries as well... ? But only if they are used?!
}
/**
* @return array Libraries in development folder.
*/
public function getLibraries() {
return $this->libraries;
}
/**
* Get library
*
* @param string $name of the library.
* @param int $majorVersion of the library.
* @param int $minorVersion of the library.
* @return array library.
*/
public function getLibrary($name, $majorVersion, $minorVersion) {
$library = H5PDevelopment::libraryToString($name, $majorVersion, $minorVersion);
return isset($this->libraries[$library]) === TRUE ? $this->libraries[$library] : NULL;
}
/**
* Get semantics for the given library.
*
* @param string $name of the library.
* @param int $majorVersion of the library.
* @param int $minorVersion of the library.
* @return string Semantics
*/
public function getSemantics($name, $majorVersion, $minorVersion) {
$library = H5PDevelopment::libraryToString($name, $majorVersion, $minorVersion);
if (isset($this->libraries[$library]) === FALSE) {
return NULL;
}
return $this->getFileContents($this->filesPath . $this->libraries[$library]['path'] . '/semantics.json');
}
/**
* Get translations for the given library.
*
* @param string $name of the library.
* @param int $majorVersion of the library.
* @param int $minorVersion of the library.
* @param $language
* @return string Translation
*/
public function getLanguage($name, $majorVersion, $minorVersion, $language) {
$library = H5PDevelopment::libraryToString($name, $majorVersion, $minorVersion);
if (isset($this->libraries[$library]) === FALSE) {
return NULL;
}
return $this->getFileContents($this->filesPath . $this->libraries[$library]['path'] . '/language/' . $language . '.json');
}
/**
* Writes library as string on the form "name majorVersion.minorVersion"
*
* @param string $name Machine readable library name
* @param integer $majorVersion
* @param $minorVersion
* @return string Library identifier.
*/
public static function libraryToString($name, $majorVersion, $minorVersion) {
return $name . ' ' . $majorVersion . '.' . $minorVersion;
}
}