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469 lines
17 KiB
469 lines
17 KiB
12 years ago
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<?php // $Id: importppt.php,v 1.3 2012/07/25 11:16:05 bdaloukas Exp $
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/**
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* This is a very rough importer for powerpoint slides
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* Export a powerpoint presentation with powerpoint as html pages
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* Do it with office 2002 (I think?) and no special settings
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* Then zip the directory with all of the html pages
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* and the zip file is what you want to upload
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*
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* The script supports book and lesson.
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*
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* @version $Id: importppt.php,v 1.3 2012/07/25 11:16:05 bdaloukas Exp $
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* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
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* @package lesson
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**/
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require_once("../../config.php");
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require_once("locallib.php");
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$id = required_param('id', PARAM_INT); // Course Module ID
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$pageid = optional_param('pageid', '', PARAM_INT); // Page ID
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global $matches;
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if (! $cm = get_coursemodule_from_id('lesson', $id)) {
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print_error('Course Module ID was incorrect');
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}
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if (! $course = $DB->get_record('course', array( 'id' => $cm->course))) {
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print_error('Course is misconfigured');
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}
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// allows for adaption for multiple modules
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if(! $modname = $DB->get_field('modules', 'name', array( 'id' => $cm->module))) {
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print_error('Could not find module name');
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}
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if (! $mod = $DB->get_record($modname, array( "id" => $cm->instance))) {
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print_error('Course module is incorrect');
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}
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require_login($course->id, false);
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$context = get_context_instance(CONTEXT_MODULE, $cm->id);
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require_capability('mod/lesson:edit', $context);
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$strimportppt = get_string("importppt", "lesson");
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$strlessons = get_string("modulenameplural", "lesson");
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echo $OUTPUT->heading("$strimportppt", " $strimportppt", "<a href=\"index.php?id=$course->id\">$strlessons</a> -> <a href=\"{$CFG->wwwroot}/mod/$modname/view.php?id=$cm->id\">".format_string($mod->name,true)."</a>-> $strimportppt");
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if ($form = data_submitted()) { /// Filename
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if (empty($_FILES['newfile'])) { // file was just uploaded
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notify(get_string("uploadproblem") );
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}
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if ((!is_uploaded_file($_FILES['newfile']['tmp_name']) or $_FILES['newfile']['size'] == 0)) {
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notify(get_string("uploadnofilefound") );
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} else { // Valid file is found
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if ($rawpages = readdata($_FILES, $course->id, $modname))
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{ // first try to reall all of the data in
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$pageobjects = extract_data($rawpages, $course->id, $mod->name, $modname); // parse all the html files into objects
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clean_temp(); // all done with files so dump em
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$mod_create_objects = $modname.'_create_objects';
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$mod_save_objects = $modname.'_save_objects';
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$objects = $mod_create_objects($pageobjects, $mod->id); // function to preps the data to be sent to DB
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if(! $mod_save_objects($objects, $mod->id, $pageid)) { // sends it to DB
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print_error( 'could not save');
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}
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} else {
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print_error('could not get data');
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}
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echo "<hr>";
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print_continue("{$CFG->wwwroot}/mod/$modname/view.php?id=$cm->id");
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echo $OUTPUT->footer($course);
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exit;
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}
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}
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/// Print upload form
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print_heading_with_help($strimportppt, "importppt", "lesson");
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echo $OUTPUT->box_start('center');
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echo "<form id=\"theform\" enctype=\"multipart/form-data\" method=\"post\">";
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echo "<input type=\"hidden\" name=\"id\" value=\"$cm->id\" />\n";
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echo "<input type=\"hidden\" name=\"pageid\" value=\"$pageid\" />\n";
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echo "<table cellpadding=\"5\">";
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echo "<tr><td align=\"right\">";
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print_string("upload");
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echo ":</td><td>";
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echo "<input name=\"newfile\" type=\"file\" size=\"50\" />";
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echo "</td></tr><tr><td> </td><td>";
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echo "<input type=\"submit\" name=\"save\" value=\"".get_string("uploadthisfile")."\" />";
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echo "</td></tr>";
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echo "</table>";
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echo "</form>";
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echo $OUTPUT->box_end();
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echo $OUTPUT->footer($course);
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// START OF FUNCTIONS
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function readdata($file, $courseid, $modname) {
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// this function expects a zip file to be uploaded. Then it parses
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// outline.htm to determine the slide path. Then parses each
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// slide to get data for the content
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global $CFG;
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// create an upload directory in temp
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make_upload_directory('temp/'.$modname);
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$base = $CFG->dataroot."/temp/$modname/";
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$zipfile = $_FILES["newfile"]["name"];
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$tempzipfile = $_FILES["newfile"]["tmp_name"];
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// create our directory
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$path_parts = pathinfo($zipfile);
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$dirname = substr($zipfile, 0, strpos($zipfile, '.'.$path_parts['extension'])); // take off the extension
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if (!file_exists($base.$dirname)) {
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mkdir($base.$dirname);
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}
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// move our uploaded file to temp/lesson
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move_uploaded_file($tempzipfile, $base.$zipfile);
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// unzip it!
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unzip_file($base.$zipfile, $base, false);
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$base = $base.$dirname; // update the base
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// this is the file where we get the names of the files for the slides (in the correct order too)
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$outline = $base.'/outline.htm';
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$pages = array();
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if (file_exists($outline) and is_readable($outline)) {
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$outlinecontents = file_get_contents($outline);
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$filenames = array();
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preg_match_all("/javascript:GoToSld\('(.*)'\)/", $outlinecontents, $filenames); // this gets all of our files names
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// file $pages with the contents of all of the slides
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foreach ($filenames[1] as $file) {
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$path = $base.'/'.$file;
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if (is_readable($path)) {
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$pages[$path] = file_get_contents($path);
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} else {
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return false;
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}
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}
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} else {
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// cannot find the outline, so grab all files that start with slide
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$dh = opendir($base);
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while (false !== ($file = readdir($dh))) { // read throug the directory
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if ('slide' == substr($file, 0, 5)) { // check for name (may want to check extension later)
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$path = $base.'/'.$file;
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if (is_readable($path)) {
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$pages[$path] = file_get_contents($path);
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} else {
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return false;
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}
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}
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}
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ksort($pages); // order them by file name
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}
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if (empty($pages)) {
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return false;
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}
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return $pages;
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}
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function extract_data($pages, $courseid, $lessonname, $modname) {
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// this function attempts to extract the content out of the slides
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// the slides are ugly broken xml. and the xml is broken... yeah...
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global $CFG;
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global $matches;
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$extratedpages = array();
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// directory for images
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make_mod_upload_directory($courseid); // make sure moddata is made
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make_upload_directory($courseid.'/moddata/'.$modname, false); // we store our images in a subfolder in here
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$imagedir = $CFG->dataroot.'/'.$courseid.'/moddata/'.$modname;
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if ($CFG->slasharguments) {
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$imagelink = $CFG->wwwroot.'/file.php/'.$courseid.'/moddata/'.$modname;
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} else {
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$imagelink = $CFG->wwwroot.'/file.php?file=/'.$courseid.'/moddata/'.$modname;
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}
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// try to make a unique subfolder to store the images
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$lessonname = str_replace(' ', '_', $lessonname); // get rid of spaces
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$i = 0;
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while(true) {
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if (!file_exists($imagedir.'/'.$lessonname.$i)) {
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// ok doesnt exist so make the directory and update our paths
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mkdir($imagedir.'/'.$lessonname.$i);
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$imagedir = $imagedir.'/'.$lessonname.$i;
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$imagelink = $imagelink.'/'.$lessonname.$i;
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break;
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}
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$i++;
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}
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foreach ($pages as $file => $content) {
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// to make life easier on our preg_match_alls, we strip out all tags except
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// for div and img (where our content is). We want div because sometimes we
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// can identify the content in the div based on the div's class
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$tags = '<div><img>'; // should also allow <b><i>
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$string = strip_tags($content,$tags);
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//echo s($string);
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$matches = array();
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// this will look for a non nested tag that is closed
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// want to allow <b><i>(maybe more) tags but when we do that
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// the preg_match messes up.
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preg_match_all("/(<([\w]+)[^>]*>)([^<\\2>]*)(<\/\\2>)/", $string, $matches);
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//(<([\w]+)[^>]*>)([^<\\2>]*)(<\/\\2>) original pattern
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//(<(div+)[^>]*>)[^(<div*)](<\/div>) work in progress
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$path_parts = pathinfo($file);
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$file = substr($path_parts['basename'], 0, strpos($path_parts['basename'], '.')); // get rid of the extension
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$imgs = array();
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// this preg matches all images
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preg_match_all("/<img[^>]*(src\=\"(".$file."\_image[^>^\"]*)\"[^>]*)>/i", $string, $imgs);
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// start building our page
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$page = new stdClass;
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$page->title = '';
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$page->contents = array();
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$page->images = array();
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$page->source = $path_parts['basename']; // need for book only
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// this foreach keeps the style intact. Found it doesn't help much. But if you want back uncomment
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// this foreach and uncomment the line with the comment imgstyle in it. Also need to comment out
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// the $page->images[]... line in the next foreach
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/*foreach ($imgs[1] as $img) {
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$page->images[] = '<img '.str_replace('src="', "src=\"$imagelink/", $img).' />';
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}*/
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foreach ($imgs[2] as $img) {
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copy($path_parts['dirname'].'/'.$img, $imagedir.'/'.$img);
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$page->images[] = "<img src=\"$imagelink/$img\" title=\"$img\" />"; // comment out this line if you are using the above foreach loop
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}
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for($i = 0; $i < count($matches[1]); $i++) { // go through all of our div matches
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$class = isolate_class($matches[1][$i]); // first step in isolating the class
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// check for any static classes
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switch ($class) {
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case 'T': // class T is used for Titles
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$page->title = $matches[3][$i];
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break;
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case 'B': // I would guess that all bullet lists would start with B then go to B1, B2, etc
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case 'B1': // B1-B4 are just insurance, should just hit B and all be taken care of
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case 'B2':
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case 'B3':
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case 'B4':
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$page->contents[] = build_list('<ul>', $i, 0); // this is a recursive function that will grab all the bullets and rebuild the list in html
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break;
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default:
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if ($matches[3][$i] != ' ') { // odd crap generated... sigh
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if (substr($matches[3][$i], 0, 1) == ':') { // check for leading : ... hate MS ...
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$page->contents[] = substr($matches[3][$i], 1); // get rid of :
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} else {
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$page->contents[] = $matches[3][$i];
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}
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}
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break;
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}
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}
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// add the page to the array;
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$extratedpages[] = $page;
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} // end $pages foreach loop
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return $extratedpages;
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}
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/**
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A recursive function to build a html list
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*/
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function build_list($list, &$i, $depth) {
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global $matches; // not sure why I global this...
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while($i < count($matches[1])) {
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$class = isolate_class($matches[1][$i]);
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if (strstr($class, 'B')) { // make sure we are still working with bullet classes
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if ($class == 'B') {
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$this_depth = 0; // calling class B depth 0
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} else {
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// set the depth number. So B1 is depth 1 and B2 is depth 2 and so on
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$this_depth = substr($class, 1);
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if (!is_numeric($this_depth)) {
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print_error( 'Depth not parsed!');
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}
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}
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if ($this_depth < $depth) {
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// we are moving back a level in the nesting
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break;
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}
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if ($this_depth > $depth) {
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// we are moving in a lvl in nesting
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$list .= '<ul>';
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$list = build_list($list, $i, $this_depth);
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// once we return back, should go to the start of the while
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continue;
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}
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// no depth changes, so add the match to our list
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if ($cleanstring = ppt_clean_text($matches[3][$i])) {
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$list .= '<li>'.ppt_clean_text($matches[3][$i]).'</li>';
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}
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$i++;
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} else {
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// not a B class, so get out of here...
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break;
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}
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}
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// end the list and return it
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$list .= '</ul>';
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return $list;
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}
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/**
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Given an html tag, this function will
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*/
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function isolate_class($string) {
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if($class = strstr($string, 'class=')) { // first step in isolating the class
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$class = substr($class, strpos($class, '=')+1); // this gets rid of <div blawblaw class= there are no "" or '' around the class name ...sigh...
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if (strstr($class, ' ')) {
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// spaces found, so cut off everything off after the first space
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return substr($class, 0, strpos($class, ' '));
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} else {
|
||
|
|
// no spaces so nothing else in the div tag, cut off the >
|
||
|
|
return substr($class, 0, strpos($class, '>'));
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
// no class defined in the tag
|
||
|
|
return '';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
This function strips off the random chars that ppt puts infront of bullet lists
|
||
|
|
*/
|
||
|
|
function ppt_clean_text($string) {
|
||
|
|
$chop = 1; // default: just a single char infront of the content
|
||
|
|
|
||
|
|
// look for any other crazy things that may be infront of the content
|
||
|
|
if (strstr($string, '<') and strpos($string, '<') == 0) { // look for the < in the sting and make sure it is in the front
|
||
|
|
$chop = 4; // increase the $chop
|
||
|
|
}
|
||
|
|
// may need to add more later....
|
||
|
|
|
||
|
|
$string = substr($string, $chop);
|
||
|
|
|
||
|
|
if ($string != ' ') {
|
||
|
|
return $string;
|
||
|
|
} else {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
Clean up the temp directory
|
||
|
|
*/
|
||
|
|
function clean_temp() {
|
||
|
|
global $CFG;
|
||
|
|
// this function is broken, use it to clean up later
|
||
|
|
// should only clean up what we made as well because someone else could be importing ppt as well
|
||
|
|
//delDirContents($CFG->dataroot.'/temp/lesson');
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
Creates objects an chapter object that is to be inserted into the database
|
||
|
|
*/
|
||
|
|
function book_create_objects($pageobjects, $bookid) {
|
||
|
|
|
||
|
|
$chapters = array();
|
||
|
|
$chapter = new stdClass;
|
||
|
|
|
||
|
|
// same for all chapters
|
||
|
|
$chapter->bookid = $bookid;
|
||
|
|
$chapter->pagenum = $DB->count_records('book_chapters', array( 'bookid' => $bookid))+1;
|
||
|
|
$chapter->timecreated = time();
|
||
|
|
$chapter->timemodified = time();
|
||
|
|
$chapter->subchapter = 0;
|
||
|
|
|
||
|
|
$i = 1;
|
||
|
|
foreach ($pageobjects as $pageobject) {
|
||
|
|
$page = prep_page($pageobject, $i); // get title and contents
|
||
|
|
$chapter->importsrc = addslashes($pageobject->source); // add the source
|
||
|
|
$chapter->title = $page->title;
|
||
|
|
$chapter->content = $page->contents;
|
||
|
|
$chapters[] = $chapter;
|
||
|
|
|
||
|
|
// increment our page number and our counter
|
||
|
|
$chapter->pagenum = $chapter->pagenum + 1;
|
||
|
|
$i++;
|
||
|
|
}
|
||
|
|
|
||
|
|
return $chapters;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
Builds the title and content strings from an object
|
||
|
|
*/
|
||
|
|
function prep_page($pageobject, $count) {
|
||
|
|
if ($pageobject->title == '') {
|
||
|
|
$page->title = "Page $count"; // no title set so make a generic one
|
||
|
|
} else {
|
||
|
|
$page->title = addslashes($pageobject->title);
|
||
|
|
}
|
||
|
|
|
||
|
|
$page->contents = '';
|
||
|
|
|
||
|
|
// nab all the images first
|
||
|
|
foreach ($pageobject->images as $image) {
|
||
|
|
$image = str_replace("\n", '', $image);
|
||
|
|
$image = str_replace("\r", '', $image);
|
||
|
|
$image = str_replace("'", '"', $image); // imgstyle
|
||
|
|
|
||
|
|
$page->contents .= addslashes($image);
|
||
|
|
}
|
||
|
|
// go through the contents array and put <p> tags around each element and strip out \n which I have found to be uneccessary
|
||
|
|
foreach ($pageobject->contents as $content) {
|
||
|
|
$content = str_replace("\n", '', $content);
|
||
|
|
$content = str_replace("\r", '', $content);
|
||
|
|
$content = str_replace(' ', '', $content); // puts in returns?
|
||
|
|
$content = '<p>'.$content.'</p>';
|
||
|
|
$page->contents .= addslashes($content);
|
||
|
|
}
|
||
|
|
return $page;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
Save the chapter objects to the database
|
||
|
|
*/
|
||
|
|
function book_save_objects($chapters, $bookid, $pageid='0') {
|
||
|
|
global $DB;
|
||
|
|
|
||
|
|
// nothing fancy, just save them all in order
|
||
|
|
foreach ($chapters as $chapter) {
|
||
|
|
if (!$chapter->id = $DB->insert_record('book_chapters', $chapter)) {
|
||
|
|
print_error('Could not update your book');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|