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< ? php
interface h5pFramework {
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public function setErrorMessage ( $message );
public function setInfoMessage ( $message );
public function t ( $message , $replacements );
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public function getUploadedH5pFolderPath ();
public function getH5pPath ();
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public function getUploadedH5pPath ();
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public function isStoredLibrary ( $machineName , $minimumVersion );
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public function storeLibraryData ( $libraryData );
public function storeContentData ( $contentId , $contentJson , $mainJsonData );
public function saveLibraryUsage ( $contentId , $librariesInUse );
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}
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class h5pValidator {
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public $h5pF ;
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public $h5pC ;
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// Schemas used to validate the h5p files
private $h5pRequired = array (
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'title' => '/^.{1,255}$/' ,
'mainVersion' => '/^[0-9]{1,5}$/' ,
'language' => '/^[a-z]{1,5}$/' ,
'machineName' => '/^[a-z0-9\-]{1,255}$/' ,
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'preloadedDependencies' => array (
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'machineName' => '/^[a-z0-9\-]{1,255}$/' ,
'minimumVersion' => '/^[0-9]{1,5}$/' ,
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),
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'init' => '/^[$a-z_][0-9a-z_\.$]{1,254}$/i' ,
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'embedTypes' => array ( 'iframe' , 'div' ),
);
private $h5pOptional = array (
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'contentType' => '/^.{1,255}$/' ,
'utilization' => '/^.{1,}$/' ,
'subVersion' => '/^[0-9]{1,5}$/' ,
'author' => '/^.{1,255}$/' ,
'lisence' => '/^(iframe|div)$/' ,
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'dynamicDependencies' => array (
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'machineName' => '/^[a-z0-9\-]{1,255}$/' ,
'minimumVersion' => '/^[0-9]{1,5}$/' ,
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),
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'preloadedJs' => array (
'path' => '/^(\\[a-z_\-\s0-9\.]+)+\.(?i)(js)$/' ,
),
'preloadedCss' => array (
'path' => '/^(\\[a-z_\-\s0-9\.]+)+\.(?i)(js)$/' ,
),
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'w' => '/^[0-9]{1,4}$/' ,
'h' => '/^[0-9]{1,4}$/' ,
'metaKeywords' => '/^.{1,}$/' ,
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'metaDescription' => '/^.{1,}$/k' ,
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);
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// These are the same as above, except the preloadedDependencies are optional. Created in the constructor.
private $h5pLibraryRequired ;
private $h5pLibraryOptional ;
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/**
* Constructor for the h5pValidator
*
* @ param object $h5pFramework
* The frameworks implementation of the h5pFramework interface
*/
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public function __construct ( $h5pFramework , $h5pCore ) {
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$this -> h5pF = $h5pFramework ;
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$this -> h5pC = $h5pCore ;
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$this -> h5pLibraryRequired = $this -> arrayCopy ( $this -> h5pLibraryRequired );
$requiredDependencies = $this -> h5pLibraryRequired [ 'requiredDependencies' ];
unset ( $this -> h5pLibraryRequired [ 'requiredDependencies' ]);
$this -> h5pLibraryOptional = $this -> arrayCopy ( $this -> h5pLibraryRequired );
$this -> h5pLibraryOptional [ 'requiredDependencies' ] = $requiredDependencies ;
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}
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/**
* Validates a . h5p file
*
* @ return boolean
* TRUE if the . h5p file is valid
*/
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public function isValidPackage () {
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// Requires PEAR
require_once 'Archive/Tar.php' ;
// Create a temporary dir to extract package in.
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$tmp_dir = $this -> h5pFramework -> getUploadedH5pFolderPath ();
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$tmp_path = $this -> h5pFramework -> getUploadedH5pPath ();
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$valid = TRUE ;
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// Extract and then remove the package file.
$tar = new Archive_Tar ( $tmp_path , 'bz2' );
if ( ! $tar -> extract ( $tmp_dir )) {
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$this -> h5pF -> setErrorMessage ( $this -> h5pF -> t ( 'The file you uploaded is not a valid HTML5 Pack.' ));
$this -> delTree ( $tmp_dir );
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return ;
}
unlink ( $tmp_path );
// Process content and libraries
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$libraries = array ();
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$files = scandir ( $tmp_dir );
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$mainH5pData ;
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$libraryJsonData ;
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$mainH5pExists = $imageExists = $contentExists = FALSE ;
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foreach ( $files as $file ) {
if ( in_array ( $file , array ( '.' , '..' ))) {
continue ;
}
$file_path = $tmp_dir . DIRECTORY_SEPARATOR . $file ;
if ( strtolower ( $file ) == 'h5p.json' ) {
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$mainH5pData = $this -> getJsonData ( $file_path );
if ( $mainH5pData === FALSE ) {
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$valid = FALSE ;
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$this -> h5pF -> setErrorMessage ( $this -> h5pF -> t ( 'Could not find or parse the main h5p.json file' ));
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}
else {
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$validH5p = $this -> isValidH5pData ( $mainH5pData , $file , $this -> h5pRequired , $this -> h5pOptional );
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if ( $validH5p ) {
$mainH5pExists = TRUE ;
}
else {
$valid = FALSE ;
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$this -> h5pF -> setErrorMessage ( $this -> h5pF -> t ( 'Could not find or parse the main h5p.json file' ));
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}
}
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}
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elseif ( strtolower ( $file ) == 'h5p.jpg' ) {
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$imageExists = TRUE ;
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}
elseif ( $file == 'content' ) {
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$contentJsonData = $this -> getJsonData ( $file_path . DIRECTORY_SEPARATOR . 'content.json' );
if ( $contentJsonData === FALSE ) {
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$this -> h5pF -> setErrorMessage ( $this -> h5pF -> t ( 'Could not find or parse the content.json file' ));
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$valid = FALSE ;
continue ;
}
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else {
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$contentExists = TRUE ;
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// In the future we might let the librarys provide validation functions for content.json
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}
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}
elseif ( strpos ( $file , '.' ) !== FALSE ) {
// Illegal file fond. This is ignored.
continue ;
}
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else {
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if ( preg_match ( '/[^a-z0-9\-]/' , $file ) === 0 ) {
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$this -> h5pF -> setErrorMessage ( $this -> h5pF -> t ( 'Invalid library name: %name' , array ( '%name' => $file )));
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$valid = FALSE ;
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continue ;
}
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$h5pData = $this -> getJsonData ( $file_path . DIRECTORY_SEPARATOR . 'h5p.json' );
if ( $h5pData === FALSE ) {
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$this -> h5pF -> setErrorMessage ( $this -> h5pF -> t ( 'Could not find h5p.json file with valid json format for library %name' , array ( '%name' => $file )));
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$valid = FALSE ;
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continue ;
}
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$validLibrary = $this -> isValidH5pData ( $h5pData , $library_name , $this -> h5pLibraryRequired , $this -> h5pLibraryOptional );
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if ( isset ( $h5pData -> preloadedJs )) {
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$validLibrary = $this -> isExcistingFiles ( $h5pData -> preloadedJs , $tmp_dir , $file ) && $validLibrary ;
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}
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if ( isset ( $h5pData -> preloadedCss )) {
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$validLibrary = $this -> isExcistingFiles ( $h5pData -> preloadedCss , $tmp_dir , $file ) && $validLibrary ;
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}
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if ( $validLibrary ) {
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$libraries [ $file ][ $h5pData [ 'mainVersion' ]] = $h5pData ;
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}
$valid = $validLibrary && $valid ;
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}
}
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if ( ! $contentExists ) {
$this -> h5pF -> setErrorMessage ( $this -> h5pF -> t ( 'A valid content folder is missing' ));
$valid = FALSE ;
}
if ( ! $mainH5pExists ) {
$this -> h5pF -> setErrorMessage ( $this -> h5pF -> t ( 'A valid main h5p.json file is missing' ));
$valid = FALSE ;
}
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if ( $valid ) {
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$this -> h5pC -> librariesJsonData = $libraries ;
$this -> h5pC -> mainJsonData = $mainH5pData ;
$this -> h5pC -> contentJsonData = $contentJsonData ;
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$libraries [ 'mainH5pData' ][] = $mainH5pData ;
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$missingLibraries = $this -> getMissingLibraries ( $libraries );
foreach ( $missingLibraries as $missing ) {
if ( $this -> h5pF -> isStoredLibrary ( $missing [ 'machineName' ], $missing [ 'minimumVersion' ])) {
unset ( $missingLibraries [ $missing [ 'machineName' ]]);
}
}
$valid = empty ( $missingLibraries ) && $valid ;
}
if ( ! $valid ) {
$this -> delTree ( $tmp_dir );
}
return $valid ;
}
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/**
* Use the dependency declarations to find any missing libraries
*
* @ param array $libraries
* A multidimensional array of libraries keyed with machineName first and mainVersion second
* @ return array
* A list of libraries that are missing keyed with machineName and holds objects with
* machineName and minimumVersion properties
*/
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private function getMissingLibraries ( $libraries ) {
$missing = array ();
foreach ( $libraries as $library ) {
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$library = end ( $library );
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if ( isset ( $library [ 'preloadedDependencies' ])) {
array_merge ( $missing , $this -> getMissingDependencies ( $library [ 'preloadedDependencies' ], $libraries ));
}
if ( isset ( $library [ 'dynamicDependencies' ])) {
array_merge ( $missing , $this -> getMissingDependencies ( $library [ 'dynamicDependencies' ], $libraries ));
}
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}
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return $missing ;
}
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/**
* Helper function for getMissingLibraries , searches for dependency required libraries in
* the provided list of libraries
*
* @ param array $dependencies
* A list of objects with machineName and minimumVersion properties
* @ param array $libraries
* A multidimensional array of libraries keyed with machineName first and mainVersion second
* @ return
* A list of libraries that are missing keyed with machineName and holds objects with
* machineName and minimumVersion properties
*/
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private function getMissingDependencies ( $dependencies , $libraries ) {
$missing = array ();
foreach ( $library [ 'preloadedDependencies' ] as $dependency ) {
if ( isset ( $libraries [ $dependency [ 'machineName' ]])) {
if ( $libraries [ $dependency [ 'machineName' ]][ 'minimumVersion' ] < $dependency [ 'minimumVersion' ]) {
$missing [ $dependency [ 'machineName' ]] = $dependency ;
}
}
else {
$missing [ $dependency [ 'machineName' ]] = $dependency ;
}
}
return $missing ;
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}
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/**
* Figure out if the provided file paths exists
*
* Triggers error messages if files doesn ' t exist
*
* @ param array $files
* List of file paths relative to $tmp_dir
* @ param string $tmp_dir
* Path to the directory where the $files are stored .
* @ param string $library
* Name of the library we are processing
* @ return boolean
* TRUE if all the files excists
*/
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private function isExcistingFiles ( $files , $tmp_dir , $library ) {
foreach ( $files as $file_path ) {
$path = str_replace ( array ( '/' , '\\' ), DIRECTORY_SEPARATOR , $file_path );
if ( ! file_exists ( $tmp_dir . DIRECTORY_SEPARATOR . $path )) {
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$this -> h5pF -> setErrorMessage ( 'The JS file %file is missing from library: %name' , array ( '%file' => $file_path , '%name' => $library ));
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return FALSE ;
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}
}
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return TRUE ;
}
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/**
* Validates h5p . json data
*
* Error messages are triggered if the data isn ' t valid
*
* @ param array $h5pData
* h5p data
* @ param string $library_name
* Name of the library we are processing
* @ param array $required
* Validation pattern for required properties
* @ param array $optional
* Validation pattern for optional properties
* @ return boolean
* TRUE if the $h5pData is valid
*/
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private function isValidH5pData ( $h5pData , $library_name , $required , $optional ) {
$valid = $this -> isValidRequiredH5pData ( $h5pData , $required , $library_name );
$valid = $this -> isValidOptionalH5pData ( $h5pData , $optional , $library_name ) && $valid ;
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return $valid ;
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}
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/**
* Helper function for isValidH5pData
*
* Validates the optional part of the h5pData
*
* Triggers error messages
*
* @ param array $h5pData
* h5p data
* @ param array $requirements
* Validation pattern
* @ param string $library_name
* Name of the library we are processing
* @ return boolean
* TRUE if the optional part of the $h5pData is valid
*/
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private function isValidOptionalH5pData ( $h5pData , $requirements , $library_name ) {
$valid = TRUE ;
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foreach ( $h5pData as $key => $value ) {
if ( isset ( $requirements [ $key ])) {
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$valid = isValidRequirement ( $h5pData , $requirement , $library_name , $property_name ) && $valid ;
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}
// Else: ignore, a package can have parameters that this library doesn't care about, but that library
// specific implementations does care about...
}
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return $valid ;
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}
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/**
*
*
* @ param < type > $h5pData
* @ param < type > $requirement
* @ param < type > $library_name
* @ param < type > $property_name
* @ return boolean
*/
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private function isValidRequirement ( $h5pData , $requirement , $library_name , $property_name ) {
$valid = TRUE ;
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if ( is_string ( $requirement )) {
// The requirement is a regexp, match it against the data
if ( is_string ( $h5pData )) {
if ( preg_match ( $requirement , $h5pData ) === 0 ) {
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$this -> h5pF -> setErrorMessage ( $this -> h5pF -> t ( " Ivalid data provided for %property in %library " , array ( '%property' => $property_name , '%library' => $library_name )));
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$valid = FALSE ;
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}
}
else {
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$this -> h5pF -> setErrorMessage ( $this -> h5pF -> t ( " Ivalid data provided for %property in %library " , array ( '%property' => $property_name , '%library' => $library_name )));
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$valid = FALSE ;
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}
}
elseif ( is_array ( $requirement )) {
// We have sub requirements
if ( is_array ( $h5pData )) {
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$valid = $this -> isValidRequiredH5pData ( $h5pData , $requirement , $library_name ) && $valid ;
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}
else {
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$this -> h5pF -> setErrorMessage ( $this -> h5pF -> t ( " Ivalid data provided for %property in %library " , array ( '%property' => $property_name , '%library' => $library_name )));
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$valid = FALSE ;
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}
}
else {
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$this -> h5pF -> setErrorMessage ( $this -> h5pF -> t ( " Can't read the property %property in %library " , array ( '%property' => $property_name , '%library' => $library_name )));
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$valid = FALSE ;
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}
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return $valid ;
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}
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private function isValidRequiredH5pData ( $h5pData , $requirements , $library_name ) {
$valid = TRUE ;
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foreach ( $requirements as $required => $requirement ) {
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if ( is_int ( $required )) {
// We have an array of allowed options
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return isValidH5pDataOptions ( $h5pData , $requirements , $library_name );
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}
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if ( isset ( $h5pData [ $required ])) {
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// TODO: Make sure this works with multiple css files.
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$valid = validateRequirement ( $h5pData [ $required ], $requirement , $library_name , $required ) && $valid ;
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}
else {
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$this -> h5pF -> setErrorMessage ( $this -> h5pF -> t ( 'The required property %property is missing from %library' , array ( '%property' => $required , '%library' => $library_name )));
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$valid = FALSE ;
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}
}
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return $valid ;
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}
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private function isValidH5pDataOptions ( $selected , $allowed , $library_name ) {
$valid = TRUE ;
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foreach ( $selected as $value ) {
if ( ! in_array ( $value , $allowed )) {
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$this -> h5pF -> setErrorMessage ( $this -> h5pF -> t ( 'Illegal option %option in %library' , array ( '%option' => $value , '%library' => $library_name )));
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$valid = FALSE ;
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}
}
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return $valid ;
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}
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private function getJsonData ( $file_path ) {
$json = file_get_contents ( $file_path );
if ( ! $json ) {
return FALSE ;
}
$jsonData = json_decode ( $json );
if ( ! $jsonData ) {
return FALSE ;
}
return $jsonData ;
}
private function arrayCopy ( array $array ) {
$result = array ();
foreach ( $array as $key => $val ) {
if ( is_array ( $val )) {
$result [ $key ] = arrayCopy ( $val );
}
elseif ( is_object ( $val )) {
$result [ $key ] = clone $val ;
}
else {
$result [ $key ] = $val ;
}
}
return $result ;
}
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/**
* Recursive function for removing directories .
*
* @ param string $dir Directory .
* @ return boolean Indicates if the directory existed .
*/
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public static function delTree ( $dir ) {
$files = array_diff ( scandir ( $dir ), array ( '.' , '..' ));
foreach ( $files as $file ) {
( is_dir ( " $dir / $file " )) ? delTree ( " $dir / $file " ) : unlink ( " $dir / $file " );
}
return rmdir ( $dir );
}
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}
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class h5pSaver {
public $h5pF ;
public $h5pC ;
/**
* Constructor for the h5pSaver
*
* @ param object $h5pFramework
* The frameworks implementation of the h5pFramework interface
*/
public function __construct ( $h5pFramework , $h5pCore ) {
$this -> h5pF = $h5pFramework ;
$this -> h5pC = $h5pCore ;
}
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public function savePackage ( $contentId ) {
foreach ( $this -> h5pC -> librariesJsonData as $key => $value ) {
if ( ! $this -> h5pF -> isStoredLibrary ( $key , key ( $value ))) {
$current_path = $this -> h5pF -> getUploadedH5pFolderPath () . DIRECTORY_SEPARATOR . $key ;
$destination_path = $this -> h5pF -> getH5pPath () . DIRECTORY_SEPARATOR . 'libraries' . DIRECTORY_SEPARATOR . $key ;
rename ( $current_path , $destination_path );
$this -> h5pF -> storeLibraryData ( end ( $value ));
// @todo: Handle cases where we have a copy of this library, but of an older version
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}
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}
$current_path = $this -> h5pF -> getUploadedH5pFolderPath () . DIRECTORY_SEPARATOR . 'content' ;
$destination_path = $this -> h5pF -> getH5pPath () . DIRECTORY_SEPARATOR . 'content' . DIRECTORY_SEPARATOR . $contentId ;
rename ( $current_path , $destination_path );
$contentJson = file_get_contents ( $destination_path . DIRECTORY_SEPARATOR . $contentId . DIRECTORY_SEPARATOR . 'content.json' );
$this -> h5pF -> storeContentData ( $contentId , $contentJson , $this -> h5pC -> mainJsonData );
$librariesInUse = array ();
$this -> getLibraryUsage ( $librariesInUse , $this -> h5pC -> mainJsonData );
$this -> h5pF -> saveLibraryUsage ( $contentId , $librariesInUse );
}
public function getLibraryUsage ( & $librariesInUse , $jsonData , $dynamic = FALSE ) {
if ( isset ( $jsonData [ 'preloadedDependencies' ])) {
foreach ( $jsonData [ 'preloadedDependencies' ] as $preloadedDependency ) {
$librariesInUse [ $preloadedDependency [ 'machineName' ]] = array (
'mainVersion' => key ( $this -> h5pC -> librariesJsonData [ $preloadedDependency [ 'machineName' ]]),
'preloaded' => $dynamic ? 0 : 1 ,
);
$this -> saveLibraryUsage ( $librariesInUse , end ( $this -> h5pC -> librariesJsonData [ $preloadedDependency [ 'machineName' ]]), $dynamic );
}
}
if ( isset ( $jsonData [ 'dynamicDependencies' ])) {
foreach ( $jsonData [ 'dynamicDependencies' ] as $dynamicDependency ) {
if ( ! isset ( $librariesInUse [ $dynamicDependency [ 'machineName' ]])) {
$librariesInUse [ $dynamicDependency [ 'machineName' ]] = array (
'mainVersion' => key ( $this -> h5pC -> librariesJsonData [ $dynamicDependency [ 'machineName' ]]),
'preloaded' => 0 ,
);
}
$this -> saveLibraryUsage ( $librariesInUse , end ( $this -> h5pC -> librariesJsonData [ $dynamicDependency [ 'machineName' ]]), TRUE );
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}
}
}
}
class h5pCore {
public $h5pF ;
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public $librariesJsonData ;
public $contentJsonData ;
public $mainJsonData ;
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/**
* Constructor for the h5pSaver
*
* @ param object $h5pFramework
* The frameworks implementation of the h5pFramework interface
*/
public function __construct ( $h5pFramework ) {
$this -> h5pF = $h5pFramework ;
}
}
?>