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<?php
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/**
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* @file
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* Home of the FeedsFileFetcher and related classes.
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*/
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/**
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* Definition of the import batch object created on the fetching stage by
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* FeedsFileFetcher.
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*/
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class FeedsFileFetcherResult extends FeedsFetcherResult {
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/**
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* Constructor.
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*/
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public function __construct($file_path) {
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parent::__construct('');
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$this->file_path = $file_path;
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}
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/**
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* Overrides parent::getRaw().
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*/
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public function getRaw() {
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return $this->sanitizeRaw(file_get_contents($this->file_path));
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}
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/**
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* Overrides parent::getFilePath().
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*/
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public function getFilePath() {
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if (!file_exists($this->file_path)) {
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throw new Exception(t('File @filepath is not accessible.', array('@filepath' => $this->file_path)));
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}
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return $this->sanitizeFile($this->file_path);
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}
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}
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/**
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* Fetches data via HTTP.
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*/
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class FeedsFileFetcher extends FeedsFetcher {
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/**
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* Implements FeedsFetcher::fetch().
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*/
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public function fetch(FeedsSource $source) {
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$source_config = $source->getConfigFor($this);
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// Just return a file fetcher result if this is a file.
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if (is_file($source_config['source'])) {
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return new FeedsFileFetcherResult($source_config['source']);
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}
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// Batch if this is a directory.
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$state = $source->state(FEEDS_FETCH);
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$files = array();
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if (!isset($state->files)) {
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$state->files = $this->listFiles($source_config['source']);
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$state->total = count($state->files);
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}
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if (count($state->files)) {
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$file = array_shift($state->files);
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$state->progress($state->total, $state->total - count($state->files));
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return new FeedsFileFetcherResult($file);
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}
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throw new Exception(t('Resource is not a file or it is an empty directory: %source', array('%source' => $source_config['source'])));
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}
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/**
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* Returns an array of files in a directory.
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*
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* @param string $dir
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* A stream wreapper URI that is a directory.
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*
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* @return array
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* An array of stream wrapper URIs pointing to files. The array is empty if
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* no files could be found. Never contains directories.
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*/
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protected function listFiles($dir) {
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$dir = file_stream_wrapper_uri_normalize($dir);
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$files = array();
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if ($items = @scandir($dir)) {
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foreach ($items as $item) {
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if (is_file("$dir/$item") && strpos($item, '.') !== 0) {
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$files[] = "$dir/$item";
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}
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}
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}
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return $files;
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}
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/**
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* Source form.
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*/
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public function sourceForm($source_config) {
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$form = array();
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$form['fid'] = array(
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'#type' => 'value',
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'#value' => empty($source_config['fid']) ? 0 : $source_config['fid'],
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);
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if (empty($this->config['direct'])) {
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$form['source'] = array(
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'#type' => 'value',
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'#value' => empty($source_config['source']) ? '' : $source_config['source'],
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);
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$form['upload'] = array(
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'#type' => 'file',
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'#title' => empty($this->config['direct']) ? t('File') : NULL,
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'#description' => empty($source_config['source']) ? t('Select a file from your local system.') : t('Select a different file from your local system.'),
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'#theme' => 'feeds_upload',
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'#file_info' => empty($source_config['fid']) ? NULL : file_load($source_config['fid']),
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'#size' => 10,
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);
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}
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else {
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$form['source'] = array(
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'#type' => 'textfield',
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'#title' => t('File'),
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'#description' => t('Specify a path to a file or a directory. Prefix the path with a scheme. Available schemes: @schemes.', array('@schemes' => implode(', ', $this->config['allowed_schemes']))),
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'#default_value' => empty($source_config['source']) ? '' : $source_config['source'],
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);
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}
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return $form;
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}
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/**
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* Overrides parent::sourceFormValidate().
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*/
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public function sourceFormValidate(&$values) {
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$values['source'] = trim($values['source']);
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if (empty($this->config['direct'])) {
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$feed_dir = $this->config['directory'];
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if (!file_prepare_directory($feed_dir, FILE_CREATE_DIRECTORY | FILE_MODIFY_PERMISSIONS)) {
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if (user_access('administer feeds')) {
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$plugin_key = feeds_importer($this->id)->config[$this->pluginType()]['plugin_key'];
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$link = url('admin/structure/feeds/' . $this->id . '/settings/' . $plugin_key);
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form_set_error('feeds][FeedsFileFetcher][source', t('Upload failed. Please check the upload <a href="@link">settings.</a>', array('@link' => $link)));
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}
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else {
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form_set_error('feeds][FeedsFileFetcher][source', t('Upload failed. Please contact your site administrator.'));
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}
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watchdog('feeds', 'The upload directory %directory required by a feed could not be created or is not accessible. A newly uploaded file could not be saved in this directory as a consequence, and the upload was canceled.', array('%directory' => $feed_dir));
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}
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// Validate and save uploaded file.
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elseif ($file = file_save_upload('feeds', array('file_validate_extensions' => array(0 => $this->config['allowed_extensions'])), $feed_dir)) {
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$values['source'] = $file->uri;
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$values['file'] = $file;
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}
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elseif (empty($values['source'])) {
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form_set_error('feeds][FeedsFileFetcher][source', t('Please upload a file.'));
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}
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else {
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// File present from previous upload. Nothing to validate.
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}
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}
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else {
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// Check if chosen url scheme is allowed.
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$scheme = file_uri_scheme($values['source']);
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if (!$scheme || !in_array($scheme, $this->config['allowed_schemes'])) {
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form_set_error('feeds][FeedsFileFetcher][source', t("The file needs to reside within the site's files directory, its path needs to start with scheme://. Available schemes: @schemes.", array('@schemes' => implode(', ', $this->config['allowed_schemes']))));
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}
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// Check wether the given path exists.
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elseif (!file_exists($values['source'])) {
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form_set_error('feeds][FeedsFileFetcher][source', t('The specified file or directory does not exist.'));
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}
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}
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}
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/**
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* Overrides parent::sourceSave().
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*/
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public function sourceSave(FeedsSource $source) {
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$source_config = $source->getConfigFor($this);
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// If a new file is present, delete the old one and replace it with the new
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// one.
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if (isset($source_config['file'])) {
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$file = $source_config['file'];
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if (isset($source_config['fid'])) {
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$this->deleteFile($source_config['fid'], $source->feed_nid);
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}
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$file->status = FILE_STATUS_PERMANENT;
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file_save($file);
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file_usage_add($file, 'feeds', get_class($this), $source->feed_nid);
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$source_config['fid'] = $file->fid;
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unset($source_config['file']);
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$source->setConfigFor($this, $source_config);
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}
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}
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/**
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* Overrides parent::sourceDelete().
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*/
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public function sourceDelete(FeedsSource $source) {
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$source_config = $source->getConfigFor($this);
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if (isset($source_config['fid'])) {
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$this->deleteFile($source_config['fid'], $source->feed_nid);
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}
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}
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/**
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* Overrides parent::configDefaults().
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*/
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public function configDefaults() {
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$schemes = $this->getSchemes();
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$scheme = in_array('private', $schemes) ? 'private' : 'public';
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return array(
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'allowed_extensions' => 'txt csv tsv xml opml',
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'direct' => FALSE,
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'directory' => $scheme . '://feeds',
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'allowed_schemes' => $schemes,
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);
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}
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/**
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* Overrides parent::configForm().
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*/
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public function configForm(&$form_state) {
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$form = array();
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$form['allowed_extensions'] = array(
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'#type' => 'textfield',
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'#title' => t('Allowed file extensions'),
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'#description' => t('Allowed file extensions for upload.'),
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'#default_value' => $this->config['allowed_extensions'],
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);
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$form['direct'] = array(
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'#type' => 'checkbox',
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'#title' => t('Supply path to file or directory directly'),
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'#description' => t('For experts. Lets users specify a path to a file <em>or a directory of files</em> directly,
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instead of a file upload through the browser. This is useful when the files that need to be imported
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are already on the server.'),
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'#default_value' => $this->config['direct'],
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);
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$form['directory'] = array(
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'#type' => 'textfield',
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'#title' => t('Upload directory'),
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'#description' => t('Directory where uploaded files get stored. Prefix the path with a scheme. Available schemes: @schemes.', array('@schemes' => implode(', ', $this->getSchemes()))),
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'#default_value' => $this->config['directory'],
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'#states' => array(
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'visible' => array(':input[name="direct"]' => array('checked' => FALSE)),
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'required' => array(':input[name="direct"]' => array('checked' => FALSE)),
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),
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);
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if ($options = $this->getSchemeOptions()) {
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$form['allowed_schemes'] = array(
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'#type' => 'checkboxes',
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'#title' => t('Allowed schemes'),
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'#default_value' => $this->config['allowed_schemes'],
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'#options' => $options,
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'#description' => t('Select the schemes you want to allow for direct upload.'),
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'#states' => array(
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'visible' => array(':input[name="direct"]' => array('checked' => TRUE)),
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),
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);
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}
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return $form;
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}
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/**
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* Overrides parent::configFormValidate().
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*
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* Ensure that the chosen directory is accessible.
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*/
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public function configFormValidate(&$values) {
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$values['directory'] = trim($values['directory']);
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$values['allowed_schemes'] = array_filter($values['allowed_schemes']);
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if (!$values['direct']) {
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// Ensure that the upload directory field is not empty when not in
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// direct-mode.
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if (!$values['directory']) {
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form_set_error('directory', t('Please specify an upload directory.'));
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// Do not continue validating the directory if none was specified.
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return;
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}
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// Validate the URI scheme of the upload directory.
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$scheme = file_uri_scheme($values['directory']);
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if (!$scheme || !in_array($scheme, $this->getSchemes())) {
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form_set_error('directory', t('Please enter a valid scheme into the directory location.'));
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// Return here so that attempts to create the directory below don't
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// throw warnings.
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return;
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}
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// Ensure that the upload directory exists.
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if (!file_prepare_directory($values['directory'], FILE_CREATE_DIRECTORY | FILE_MODIFY_PERMISSIONS)) {
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form_set_error('directory', t('The chosen directory does not exist and attempts to create it failed.'));
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}
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}
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}
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/**
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* Deletes a file.
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*
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* @param int $fid
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* The file id.
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* @param int $feed_nid
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* The feed node's id, or 0 if a standalone feed.
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*
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* @return bool|array
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* TRUE for success, FALSE in the event of an error, or an array if the file
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* is being used by any modules.
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*
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* @see file_delete()
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*/
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protected function deleteFile($fid, $feed_nid) {
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if ($file = file_load($fid)) {
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file_usage_delete($file, 'feeds', get_class($this), $feed_nid);
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return file_delete($file);
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}
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return FALSE;
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}
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325
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/**
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* Returns available schemes.
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*
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* @return array
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* The available schemes.
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*/
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protected function getSchemes() {
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return array_keys(file_get_stream_wrappers(STREAM_WRAPPERS_WRITE_VISIBLE));
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}
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/**
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* Returns available scheme options for use in checkboxes or select list.
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*
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* @return array
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* The available scheme array keyed scheme => description
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340
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*/
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341
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protected function getSchemeOptions() {
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342
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$options = array();
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343
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foreach (file_get_stream_wrappers(STREAM_WRAPPERS_WRITE_VISIBLE) as $scheme => $info) {
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$options[$scheme] = check_plain($scheme . ': ' . $info['description']);
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}
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return $options;
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}
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348
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349
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}
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