h5p-php-library/h5p.classes.php

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<?php
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// TODO: Validate folders(is_dir)
// TODO: Make sure newest patchVersion is used
// TODO: Update .h5p file
interface h5pFramework {
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public function setErrorMessage($message);
public function setInfoMessage($message);
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public function t($message, $replacements = array());
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public function getUploadedH5pFolderPath();
public function getH5pPath();
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public function getUploadedH5pPath();
public function isStoredLibrary($machineName, $majorVersion, $minorVersion);
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public function storeLibraryData(&$libraryData);
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public function storeContentData($contentId, $contentJson, $mainJsonData);
public function saveLibraryUsage($contentId, $librariesInUse);
public function loadLibrary($machineName, $majorVersion, $minorVersion);
}
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class h5pValidator {
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public $h5pF;
public $h5pC;
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// Schemas used to validate the h5p files
private $h5pRequired = array(
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'title' => '/^.{1,255}$/',
'language' => '/^[a-z]{1,5}$/',
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'preloadedDependencies' => array(
'machineName' => '/^[a-z0-9\-]{1,255}$/i',
'majorVersion' => '/^[0-9]{1,5}$/',
'minorVersion' => '/^[0-9]{1,5}$/',
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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 $h5pOptional = array(
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'contentType' => '/^.{1,255}$/',
'description' => '/^.{1,}$/',
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'author' => '/^.{1,255}$/',
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'license' => '/^(cc-by|cc-by-sa|cc-by-nd|cc-by-nc|cc-by-nc-sa|cc-by-nc-nd|pd|cr)$/',
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'dynamicDependencies' => array(
'machineName' => '/^[a-z0-9\-]{1,255}$/i',
'majorVersion' => '/^[0-9]{1,5}$/',
'minorVersion' => '/^[0-9]{1,5}$/',
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),
'w' => '/^[0-9]{1,4}$/',
'h' => '/^[0-9]{1,4}$/',
'metaKeywords' => '/^.{1,}$/',
'metaDescription' => '/^.{1,}$/k',
);
private $libraryRequired = array(
'title' => '/^.{1,255}$/',
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'majorVersion' => '/^[0-9]{1,5}$/',
'minorVersion' => '/^[0-9]{1,5}$/',
'patchVersion' => '/^[0-9]{1,5}$/',
'machineName' => '/^[a-z0-9\-]{1,255}$/i',
);
private $libraryOptional = array(
'init' => '/^[$a-z_][0-9a-z_\.$]{1,254}$/i',
'author' => '/^.{1,255}$/',
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'license' => '/^(cc-by|cc-by-sa|cc-by-nd|cc-by-nc|cc-by-nc-sa|cc-by-nc-nd|pd|cr)$/',
'description' => '/^.{1,}$/',
'dynamicDependencies' => array(
'machineName' => '/^[a-z0-9\-]{1,255}$/i',
'majorVersion' => '/^[0-9]{1,5}$/',
'minorVersion' => '/^[0-9]{1,5}$/',
),
'preloadedDependencies' => array(
'machineName' => '/^[a-z0-9\-]{1,255}$/i',
'majorVersion' => '/^[0-9]{1,5}$/',
'patchVersion' => '/^[0-9]{1,5}$/',
),
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'preloadedJs' => array(
'path' => '/^((\\\|\/)?[a-z_\-\s0-9]+)+\.js$/i',
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),
'preloadedCss' => array(
'path' => '/^((\\\|\/)?[a-z_\-\s0-9]+)+\.css$/i',
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),
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'w' => '/^[0-9]{1,4}$/',
'h' => '/^[0-9]{1,4}$/',
'embedTypes' => array('iframe', 'div'),
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);
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/**
* Constructor for the h5pValidator
*
* @param object $h5pFramework
* The frameworks implementation of the h5pFramework interface
*/
public function __construct($h5pFramework, $h5pCore) {
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$this->h5pF = $h5pFramework;
$this->h5pC = $h5pCore;
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}
/**
* Validates a .h5p file
*
* @return boolean
* TRUE if the .h5p file is valid
*/
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public function isValidPackage() {
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// Create a temporary dir to extract package in.
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$tmp_dir = $this->h5pF->getUploadedH5pFolderPath();
$tmp_path = $this->h5pF->getUploadedH5pPath();
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$valid = TRUE;
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// Extract and then remove the package file.
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$zip = new ZipArchive;
if ($zip->open($tmp_path) === true) {
$zip->extractTo($tmp_dir);
$zip->close();
}
else {
$this->h5pF->setErrorMessage($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
$libraries = array();
$files = scandir($tmp_dir);
$mainH5pData;
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$libraryJsonData;
$mainH5pExists = $imageExists = $contentExists = FALSE;
foreach ($files as $file) {
if (in_array($file, array('.', '..'))) {
continue;
}
$file_path = $tmp_dir . DIRECTORY_SEPARATOR . $file;
if (strtolower($file) == 'h5p.json') {
$mainH5pData = $this->getJsonData($file_path);
if ($mainH5pData === FALSE) {
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$valid = FALSE;
$this->h5pF->setErrorMessage($this->h5pF->t('Could not find or parse the main h5p.json file'));
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}
else {
$validH5p = $this->isValidH5pData($mainH5pData, $file, $this->h5pRequired, $this->h5pOptional);
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if ($validH5p) {
$mainH5pExists = TRUE;
}
else {
$valid = FALSE;
$this->h5pF->setErrorMessage($this->h5pF->t('Could not find or parse the main h5p.json file'));
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}
}
}
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elseif (strtolower($file) == 'h5p.jpg') {
$imageExists = TRUE;
}
elseif ($file == 'content') {
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$contentJsonData = $this->getJsonData($file_path . DIRECTORY_SEPARATOR . 'content.json');
if ($contentJsonData === FALSE) {
$this->h5pF->setErrorMessage($this->h5pF->t('Could not find or parse the content.json file'));
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$valid = FALSE;
continue;
}
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else {
$contentExists = TRUE;
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// In the future we might let the librarys provide validation functions for content.json
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}
}
elseif (strpos($file, '.') !== FALSE) {
// Illegal file fond. This is ignored.
continue;
}
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else {
if (preg_match('/^[a-z0-9\-]{1,255}$/i', $file) === 0) {
$this->h5pF->setErrorMessage($this->h5pF->t('Invalid library name: %name', array('%name' => $file)));
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$valid = FALSE;
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continue;
}
$h5pData = $this->getJsonData($file_path . DIRECTORY_SEPARATOR . 'library.json');
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if ($h5pData === FALSE) {
$this->h5pF->setErrorMessage($this->h5pF->t('Could not find library.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, $file, $this->libraryRequired, $this->libraryOptional);
if (isset($h5pData['preloadedJs'])) {
$validLibrary = $this->isExcistingFiles($h5pData['preloadedJs'], $tmp_dir, $file) && $validLibrary;
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}
if (isset($h5pData['preloadedCss'])) {
$validLibrary = $this->isExcistingFiles($h5pData['preloadedCss'], $tmp_dir, $file) && $validLibrary;
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}
if ($validLibrary) {
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$libraries[$file][$h5pData['majorVersion']] = $h5pData;
}
$valid = $validLibrary && $valid;
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}
}
if (!$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'));
$valid = FALSE;
}
if ($valid) {
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$this->h5pC->librariesJsonData = $libraries;
$this->h5pC->mainJsonData = $mainH5pData;
$this->h5pC->contentJsonData = $contentJsonData;
$libraries['mainH5pData'][] = $mainH5pData;
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$missingLibraries = $this->getMissingLibraries($libraries);
foreach ($missingLibraries as $missing) {
if ($this->h5pF->isStoredLibrary($missing['machineName'], $missing['majorVersion'], $missing['minorVersion'])) {
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unset($missingLibraries[$missing['machineName']]);
}
}
$valid = empty($missingLibraries) && $valid;
}
if (!$valid) {
$this->delTree($tmp_dir);
}
return $valid;
}
/**
* Use the dependency declarations to find any missing libraries
*
* @param array $libraries
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* A multidimensional array of libraries keyed with machineName first and majorVersion second
* @return array
* A list of libraries that are missing keyed with machineName and holds objects with
* machineName, majorVersion and minorVersion properties
*/
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private function getMissingLibraries($libraries) {
$missing = array();
foreach ($libraries as $library) {
$library = end($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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return $missing;
}
/**
* Helper function for getMissingLibraries, searches for dependency required libraries in
* the provided list of libraries
*
* @param array $dependencies
* A list of objects with machineName, majorVersion and minorVersion properties
* @param array $libraries
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* A multidimensional array of libraries keyed with machineName first and majorVersion second
* @return
* A list of libraries that are missing keyed with machineName and holds objects with
* machineName, majorVersion and minorVersion properties
*/
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private function getMissingDependencies($dependencies, $libraries) {
$missing = array();
foreach ($dependencies as $dependency) {
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if (isset($libraries[$dependency['machineName']])) {
if (!$this->h5pC->isSameVersion($libraries[$dependency['machineName']], $dependency)) {
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$missing[$dependency['machineName']] = $dependency;
}
}
else {
$missing[$dependency['machineName']] = $dependency;
}
}
return $missing;
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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 = str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $file['path']);
if (!file_exists($tmp_dir . DIRECTORY_SEPARATOR . $library . DIRECTORY_SEPARATOR . $path)) {
$this->h5pF->setErrorMessage($this->h5pF->t('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;
}
/**
* Validates h5p.json and library.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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}
/**
* 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])) {
$valid = $this->isValidRequirement($value, $requirements[$key], $library_name, $key) && $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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}
/**
*
*
* @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
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if (is_string($h5pData) || is_int($h5pData)) {
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if (preg_match($requirement, $h5pData) === 0) {
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$this->h5pF->setErrorMessage($this->h5pF->t("Invalid 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("Invalid 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)) {
if (is_array(current($h5pData))) {
foreach ($h5pData as $sub_h5pData) {
$valid = $this->isValidRequiredH5pData($sub_h5pData, $requirement, $library_name) && $valid;
}
}
else {
$valid = $this->isValidRequiredH5pData($h5pData, $requirement, $library_name) && $valid;
}
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}
else {
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$this->h5pF->setErrorMessage($this->h5pF->t("Invalid data provided for %property in %library", array('%property' => $property_name, '%library' => $library_name)));
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$valid = FALSE;
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}
}
else {
$this->h5pF->setErrorMessage($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 => $requirement) {
if (is_int($required)) {
// We have an array of allowed options
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return $this->isValidH5pDataOptions($h5pData, $requirements, $library_name);
}
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if (isset($h5pData[$required])) {
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$valid = $this->isValidRequirement($h5pData[$required], $requirement, $library_name, $required) && $valid;
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}
else {
$this->h5pF->setErrorMessage($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) {
$valid = TRUE;
foreach ($selected as $value) {
if (!in_array($value, $allowed)) {
$this->h5pF->setErrorMessage($this->h5pF->t('Illegal option %option in %library', array('%option' => $value, '%library' => $library_name)));
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$valid = FALSE;
}
}
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return $valid;
}
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private function getJsonData($file_path) {
$json = file_get_contents($file_path);
if (!$json) {
return FALSE;
}
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$jsonData = json_decode($json, TRUE);
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if (!$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 $dir Directory.
* @return boolean Indicates if the directory existed.
*/
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public function delTree($dir) {
if (!is_dir($dir)) {
return;
}
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$files = array_diff(scandir($dir), array('.','..'));
foreach ($files as $file) {
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(is_dir("$dir/$file")) ? $this->delTree("$dir/$file") : unlink("$dir/$file");
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}
return rmdir($dir);
}
}
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) {
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foreach ($this->h5pC->librariesJsonData as $key => &$value) {
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if (!$this->h5pF->isStoredLibrary($key, key($value))) {
$this->h5pF->storeLibraryData(end($value));
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$current_path = $this->h5pF->getUploadedH5pFolderPath() . DIRECTORY_SEPARATOR . $key;
$destination_path = $this->h5pF->getH5pPath() . DIRECTORY_SEPARATOR . 'libraries' . DIRECTORY_SEPARATOR . $value['libraryId'];
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rename($current_path, $destination_path);
// @todo: Handle cases where we have a copy of this library, but of an older version
}
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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 . 'content.json');
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$this->h5pF->storeContentData($contentId, $contentJson, $this->h5pC->mainJsonData);
$librariesInUse = array();
$this->getLibraryUsage($librariesInUse, $this->h5pC->mainJsonData);
$this->h5pF->saveLibraryUsage($contentId, $librariesInUse);
// TODO: Remove folder from temp...
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}
public function getLibraryUsage(&$librariesInUse, $jsonData, $dynamic = FALSE) {
if (isset($jsonData['preloadedDependencies'])) {
foreach ($jsonData['preloadedDependencies'] as $preloadedDependency) {
$library = $this->h5pF->loadLibrary($preloadedDependency['machineName'], $preloadedDependency['majorVersion'], $preloadedDependency['minorVersion']);
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$librariesInUse[$preloadedDependency['machineName']] = array(
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'library' => $library,
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'preloaded' => $dynamic ? 0 : 1,
);
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$this->getLibraryUsage($librariesInUse, $library, $dynamic);
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}
}
if (isset($jsonData['dynamicDependencies'])) {
foreach ($jsonData['dynamicDependencies'] as $dynamicDependency) {
if (!isset($librariesInUse[$dynamicDependency['machineName']])) {
$library = $this->h5pF->loadLibrary($dynamicDependency['machineName'], $dynamicDependency['majorVersion'], $dynamicDependency['minorVersion']);
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$librariesInUse[$dynamicDependency['machineName']] = array(
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'library' => $library,
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'preloaded' => 0,
);
}
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$this->getLibraryUsage($librariesInUse, $library, TRUE);
}
}
}
}
class h5pCore {
public $h5pF;
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public $librariesJsonData;
public $contentJsonData;
public $mainJsonData;
/**
* Constructor for the h5pSaver
*
* @param object $h5pFramework
* The frameworks implementation of the h5pFramework interface
*/
public function __construct($h5pFramework) {
$this->h5pF = $h5pFramework;
}
public function isSameVersion($library, $dependency) {
if ($library['majorVersion'] != $dependency['majorVersion']) {
return FALSE;
}
if ($library['minorVersion'] != $dependency['minorVersion']) {
return FALSE;
}
return TRUE;
}
}
?>