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705 lines
28 KiB
705 lines
28 KiB
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Book module local lib functions
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*
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* @package mod_book
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* @copyright 2010-2011 Petr Skoda {@link http://skodak.org}
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die;
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require_once(__DIR__.'/lib.php');
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require_once($CFG->libdir.'/filelib.php');
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/**
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* The following defines are used to define how the chapters and subchapters of a book should be displayed in that table of contents.
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* BOOK_NUM_NONE No special styling will applied and the editor will be able to do what ever thay want in the title
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* BOOK_NUM_NUMBERS Chapters and subchapters are numbered (1, 1.1, 1.2, 2, ...)
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* BOOK_NUM_BULLETS Subchapters are indented and displayed with bullets
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* BOOK_NUM_INDENTED Subchapters are indented
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*/
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define('BOOK_NUM_NONE', '0');
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define('BOOK_NUM_NUMBERS', '1');
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define('BOOK_NUM_BULLETS', '2');
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define('BOOK_NUM_INDENTED', '3');
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/**
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* The following defines are used to define the navigation style used within a book.
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* BOOK_LINK_TOCONLY Only the table of contents is shown, in a side region.
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* BOOK_LINK_IMAGE Arrows link to previous/next/exit pages, in addition to the TOC.
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* BOOK_LINK_TEXT Page names and arrows link to previous/next/exit pages, in addition to the TOC.
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*/
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define ('BOOK_LINK_TOCONLY', '0');
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define ('BOOK_LINK_IMAGE', '1');
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define ('BOOK_LINK_TEXT', '2');
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/**
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* Preload book chapters and fix toc structure if necessary.
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*
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* Returns array of chapters with standard 'pagenum', 'id, pagenum, subchapter, title, content, contentformat, hidden'
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* and extra 'parent, number, subchapters, prev, next'.
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* Please note the content/text of chapters is not included.
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*
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* @param stdClass $book
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* @return array of id=>chapter
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*/
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function book_preload_chapters($book) {
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global $DB;
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$chapters = $DB->get_records('book_chapters', array('bookid' => $book->id), 'pagenum', 'id, pagenum,
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subchapter, title, content, contentformat, hidden');
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if (!$chapters) {
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return array();
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}
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$prev = null;
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$prevsub = null;
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$first = true;
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$hidesub = true;
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$parent = null;
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$pagenum = 0; // chapter sort
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$i = 0; // main chapter num
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$j = 0; // subchapter num
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foreach ($chapters as $id => $ch) {
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$oldch = clone($ch);
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$pagenum++;
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$ch->pagenum = $pagenum;
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if ($first) {
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// book can not start with a subchapter
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$ch->subchapter = 0;
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$first = false;
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}
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if (!$ch->subchapter) {
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if ($ch->hidden) {
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if ($book->numbering == BOOK_NUM_NUMBERS) {
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$ch->number = 'x';
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} else {
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$ch->number = null;
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}
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} else {
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$i++;
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$ch->number = $i;
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}
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$j = 0;
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$prevsub = null;
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$hidesub = $ch->hidden;
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$parent = $ch->id;
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$ch->parent = null;
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$ch->subchapters = array();
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} else {
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$ch->parent = $parent;
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$ch->subchapters = null;
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$chapters[$parent]->subchapters[$ch->id] = $ch->id;
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if ($hidesub) {
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// all subchapters in hidden chapter must be hidden too
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$ch->hidden = 1;
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}
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if ($ch->hidden) {
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if ($book->numbering == BOOK_NUM_NUMBERS) {
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$ch->number = 'x';
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} else {
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$ch->number = null;
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}
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} else {
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$j++;
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$ch->number = $j;
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}
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}
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if ($oldch->subchapter != $ch->subchapter or $oldch->pagenum != $ch->pagenum or $oldch->hidden != $ch->hidden) {
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// update only if something changed
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$DB->update_record('book_chapters', $ch);
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}
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$chapters[$id] = $ch;
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}
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return $chapters;
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}
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/**
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* Returns the title for a given chapter
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*
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* @param int $chid
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* @param array $chapters
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* @param stdClass $book
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* @param context_module $context
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* @return string
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*/
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function book_get_chapter_title($chid, $chapters, $book, $context) {
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$ch = $chapters[$chid];
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$title = trim(format_string($ch->title, true, array('context'=>$context)));
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$numbers = array();
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if ($book->numbering == BOOK_NUM_NUMBERS) {
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if ($ch->parent and $chapters[$ch->parent]->number) {
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$numbers[] = $chapters[$ch->parent]->number;
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}
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if ($ch->number) {
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$numbers[] = $ch->number;
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}
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}
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if ($numbers) {
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$title = implode('.', $numbers) . '. ' . $title;
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}
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return $title;
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}
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/**
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* Add the book TOC sticky block to the default region.
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*
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* @param array $chapters The Chapters in the book
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* @param stdClass $chapter The current chapter
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* @param stdClass $book The book
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* @param stdClass $cm The course module
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* @param bool|null $edit Whether the user is editing
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*/
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function book_add_fake_block($chapters, $chapter, $book, $cm, $edit = null) {
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global $PAGE, $USER;
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if ($edit === null) {
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if (has_capability('mod/book:edit', context_module::instance($cm->id))) {
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if (isset($USER->editing)) {
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$edit = $USER->editing;
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} else {
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$edit = 0;
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}
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} else {
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$edit = 0;
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}
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}
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$toc = book_get_toc($chapters, $chapter, $book, $cm, $edit);
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$bc = new block_contents();
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$bc->title = get_string('toc', 'mod_book');
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$bc->attributes['class'] = 'block block_book_toc';
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$bc->content = $toc;
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$defaultregion = $PAGE->blocks->get_default_region();
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$PAGE->blocks->add_fake_block($bc, $defaultregion);
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}
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/**
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* Generate toc structure
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*
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* @param array $chapters
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* @param stdClass $chapter
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* @param stdClass $book
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* @param stdClass $cm
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* @param bool $edit
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* @return string
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*/
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function book_get_toc($chapters, $chapter, $book, $cm, $edit) {
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global $USER, $OUTPUT;
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$toc = '';
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$nch = 0; // Chapter number
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$ns = 0; // Subchapter number
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$first = 1;
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$context = context_module::instance($cm->id);
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$viewhidden = has_capability('mod/book:viewhiddenchapters', $context);
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switch ($book->numbering) {
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case BOOK_NUM_NONE:
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$toc .= html_writer::start_tag('div', array('class' => 'book_toc_none clearfix'));
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break;
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case BOOK_NUM_NUMBERS:
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$toc .= html_writer::start_tag('div', array('class' => 'book_toc_numbered clearfix'));
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break;
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case BOOK_NUM_BULLETS:
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$toc .= html_writer::start_tag('div', array('class' => 'book_toc_bullets clearfix'));
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break;
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case BOOK_NUM_INDENTED:
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$toc .= html_writer::start_tag('div', array('class' => 'book_toc_indented clearfix'));
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break;
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}
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if ($edit) { // Editing on (Teacher's TOC).
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$toc .= html_writer::start_tag('ul');
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$i = 0;
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foreach ($chapters as $ch) {
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$i++;
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$title = trim(format_string($ch->title, true, array('context' => $context)));
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$titleunescaped = trim(format_string($ch->title, true, array('context' => $context, 'escape' => false)));
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$titleout = $title;
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if (!$ch->subchapter) {
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if ($first) {
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$toc .= html_writer::start_tag('li', array('class' => 'clearfix'));
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} else {
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$toc .= html_writer::end_tag('ul');
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$toc .= html_writer::end_tag('li');
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$toc .= html_writer::start_tag('li', array('class' => 'clearfix'));
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}
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if (!$ch->hidden) {
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$nch++;
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$ns = 0;
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if ($book->numbering == BOOK_NUM_NUMBERS) {
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$title = "$nch. $title";
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$titleout = $title;
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}
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} else {
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if ($book->numbering == BOOK_NUM_NUMBERS) {
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$title = "x. $title";
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}
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$titleout = html_writer::tag('span', $title, array('class' => 'dimmed_text'));
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}
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} else {
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if ($first) {
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$toc .= html_writer::start_tag('li', array('class' => 'clearfix'));
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$toc .= html_writer::start_tag('ul');
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$toc .= html_writer::start_tag('li', array('class' => 'clearfix'));
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} else {
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$toc .= html_writer::start_tag('li', array('class' => 'clearfix'));
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}
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if (!$ch->hidden) {
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$ns++;
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if ($book->numbering == BOOK_NUM_NUMBERS) {
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$title = "$nch.$ns. $title";
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$titleout = $title;
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}
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} else {
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if ($book->numbering == BOOK_NUM_NUMBERS) {
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if (empty($chapters[$ch->parent]->hidden)) {
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$title = "$nch.x. $title";
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} else {
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$title = "x.x. $title";
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}
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}
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$titleout = html_writer::tag('span', $title, array('class' => 'dimmed_text'));
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}
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}
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if ($ch->id == $chapter->id) {
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$toc .= html_writer::tag('strong', $titleout);
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} else {
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$toc .= html_writer::link(new moodle_url('view.php', array('id' => $cm->id, 'chapterid' => $ch->id)), $titleout,
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array('title' => $titleunescaped));
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}
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$toc .= html_writer::start_tag('div', array('class' => 'action-list'));
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if ($i != 1) {
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$toc .= html_writer::link(new moodle_url('move.php', array('id' => $cm->id, 'chapterid' => $ch->id, 'up' => '1', 'sesskey' => $USER->sesskey)),
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$OUTPUT->pix_icon('t/up', get_string('movechapterup', 'mod_book', $title)),
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array('title' => get_string('movechapterup', 'mod_book', $titleunescaped)));
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}
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if ($i != count($chapters)) {
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$toc .= html_writer::link(new moodle_url('move.php', array('id' => $cm->id, 'chapterid' => $ch->id, 'up' => '0', 'sesskey' => $USER->sesskey)),
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$OUTPUT->pix_icon('t/down', get_string('movechapterdown', 'mod_book', $title)),
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array('title' => get_string('movechapterdown', 'mod_book', $titleunescaped)));
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}
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$toc .= html_writer::link(new moodle_url('edit.php', array('cmid' => $cm->id, 'id' => $ch->id)),
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$OUTPUT->pix_icon('t/edit', get_string('editchapter', 'mod_book', $title)),
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array('title' => get_string('editchapter', 'mod_book', $titleunescaped)));
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$deleteaction = new confirm_action(get_string('deletechapter', 'mod_book', $titleunescaped));
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$toc .= $OUTPUT->action_icon(
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new moodle_url('delete.php', [
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'id' => $cm->id,
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'chapterid' => $ch->id,
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'sesskey' => sesskey(),
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'confirm' => 1,
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]),
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new pix_icon('t/delete', get_string('deletechapter', 'mod_book', $title)),
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$deleteaction,
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['title' => get_string('deletechapter', 'mod_book', $titleunescaped)]
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);
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if ($ch->hidden) {
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$toc .= html_writer::link(new moodle_url('show.php', array('id' => $cm->id, 'chapterid' => $ch->id, 'sesskey' => $USER->sesskey)),
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$OUTPUT->pix_icon('t/show', get_string('showchapter', 'mod_book', $title)),
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array('title' => get_string('showchapter', 'mod_book', $titleunescaped)));
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} else {
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$toc .= html_writer::link(new moodle_url('show.php', array('id' => $cm->id, 'chapterid' => $ch->id, 'sesskey' => $USER->sesskey)),
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$OUTPUT->pix_icon('t/hide', get_string('hidechapter', 'mod_book', $title)),
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array('title' => get_string('hidechapter', 'mod_book', $titleunescaped)));
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}
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$buttontitle = get_string('addafterchapter', 'mod_book', ['title' => $ch->title]);
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$toc .= html_writer::link(new moodle_url('edit.php', array('cmid' => $cm->id, 'pagenum' => $ch->pagenum, 'subchapter' => $ch->subchapter)),
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$OUTPUT->pix_icon('add', $buttontitle, 'mod_book'), array('title' => $buttontitle));
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$toc .= html_writer::end_tag('div');
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if (!$ch->subchapter) {
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$toc .= html_writer::start_tag('ul');
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} else {
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$toc .= html_writer::end_tag('li');
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}
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$first = 0;
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}
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$toc .= html_writer::end_tag('ul');
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$toc .= html_writer::end_tag('li');
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$toc .= html_writer::end_tag('ul');
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} else { // Editing off. Normal students, teachers view.
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$toc .= html_writer::start_tag('ul');
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foreach ($chapters as $ch) {
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$title = trim(format_string($ch->title, true, array('context'=>$context)));
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$titleunescaped = trim(format_string($ch->title, true, array('context' => $context, 'escape' => false)));
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if (!$ch->hidden || ($ch->hidden && $viewhidden)) {
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if (!$ch->subchapter) {
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$nch++;
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$ns = 0;
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if ($first) {
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$toc .= html_writer::start_tag('li', array('class' => 'clearfix'));
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} else {
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$toc .= html_writer::end_tag('ul');
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$toc .= html_writer::end_tag('li');
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$toc .= html_writer::start_tag('li', array('class' => 'clearfix'));
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}
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if ($book->numbering == BOOK_NUM_NUMBERS) {
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$title = "$nch. $title";
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}
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} else {
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$ns++;
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if ($first) {
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$toc .= html_writer::start_tag('li', array('class' => 'clearfix'));
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$toc .= html_writer::start_tag('ul');
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$toc .= html_writer::start_tag('li', array('class' => 'clearfix'));
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} else {
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$toc .= html_writer::start_tag('li', array('class' => 'clearfix'));
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}
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if ($book->numbering == BOOK_NUM_NUMBERS) {
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$title = "$nch.$ns. $title";
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}
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}
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$cssclass = ($ch->hidden && $viewhidden) ? 'dimmed_text' : '';
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if ($ch->id == $chapter->id) {
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$toc .= html_writer::tag('strong', $title, array('class' => $cssclass));
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} else {
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$toc .= html_writer::link(new moodle_url('view.php',
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array('id' => $cm->id, 'chapterid' => $ch->id)),
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$title, array('title' => s($titleunescaped), 'class' => $cssclass));
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}
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if (!$ch->subchapter) {
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$toc .= html_writer::start_tag('ul');
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} else {
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$toc .= html_writer::end_tag('li');
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}
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$first = 0;
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}
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}
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$toc .= html_writer::end_tag('ul');
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$toc .= html_writer::end_tag('li');
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$toc .= html_writer::end_tag('ul');
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}
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$toc .= html_writer::end_tag('div');
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$toc = str_replace('<ul></ul>', '', $toc); // Cleanup of invalid structures.
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return $toc;
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}
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/**
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* Returns book chapters tagged with a specified tag.
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*
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* This is a callback used by the tag area mod_book/book_chapters to search for book chapters
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* tagged with a specific tag.
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*
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* @param core_tag_tag $tag
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* @param bool $exclusivemode if set to true it means that no other entities tagged with this tag
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* are displayed on the page and the per-page limit may be bigger
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* @param int $fromctx context id where the link was displayed, may be used by callbacks
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* to display items in the same context first
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* @param int $ctx context id where to search for records
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* @param bool $rec search in subcontexts as well
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* @param int $page 0-based number of page being displayed
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* @return \core_tag\output\tagindex
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*/
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function mod_book_get_tagged_chapters($tag, $exclusivemode = false, $fromctx = 0, $ctx = 0, $rec = true, $page = 0) {
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global $OUTPUT;
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$perpage = $exclusivemode ? 20 : 5;
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// Build the SQL query.
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$ctxselect = context_helper::get_preload_record_columns_sql('ctx');
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$query = "SELECT bc.id, bc.title, bc.bookid, bc.hidden,
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cm.id AS cmid, c.id AS courseid, c.shortname, c.fullname, $ctxselect
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FROM {book_chapters} bc
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JOIN {book} b ON b.id = bc.bookid
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JOIN {modules} m ON m.name='book'
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JOIN {course_modules} cm ON cm.module = m.id AND cm.instance = b.id
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JOIN {tag_instance} tt ON bc.id = tt.itemid
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JOIN {course} c ON cm.course = c.id
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JOIN {context} ctx ON ctx.instanceid = cm.id AND ctx.contextlevel = :coursemodulecontextlevel
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WHERE tt.itemtype = :itemtype AND tt.tagid = :tagid AND tt.component = :component
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AND cm.deletioninprogress = 0
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|
AND bc.id %ITEMFILTER% AND c.id %COURSEFILTER%";
|
|
|
|
$params = array('itemtype' => 'book_chapters', 'tagid' => $tag->id, 'component' => 'mod_book',
|
|
'coursemodulecontextlevel' => CONTEXT_MODULE);
|
|
|
|
if ($ctx) {
|
|
$context = $ctx ? context::instance_by_id($ctx) : context_system::instance();
|
|
$query .= $rec ? ' AND (ctx.id = :contextid OR ctx.path LIKE :path)' : ' AND ctx.id = :contextid';
|
|
$params['contextid'] = $context->id;
|
|
$params['path'] = $context->path.'/%';
|
|
}
|
|
|
|
$query .= " ORDER BY ";
|
|
if ($fromctx) {
|
|
// In order-clause specify that modules from inside "fromctx" context should be returned first.
|
|
$fromcontext = context::instance_by_id($fromctx);
|
|
$query .= ' (CASE WHEN ctx.id = :fromcontextid OR ctx.path LIKE :frompath THEN 0 ELSE 1 END),';
|
|
$params['fromcontextid'] = $fromcontext->id;
|
|
$params['frompath'] = $fromcontext->path.'/%';
|
|
}
|
|
$query .= ' c.sortorder, cm.id, bc.id';
|
|
|
|
$totalpages = $page + 1;
|
|
|
|
// Use core_tag_index_builder to build and filter the list of items.
|
|
$builder = new core_tag_index_builder('mod_book', 'book_chapters', $query, $params, $page * $perpage, $perpage + 1);
|
|
while ($item = $builder->has_item_that_needs_access_check()) {
|
|
context_helper::preload_from_record($item);
|
|
$courseid = $item->courseid;
|
|
if (!$builder->can_access_course($courseid)) {
|
|
$builder->set_accessible($item, false);
|
|
continue;
|
|
}
|
|
$modinfo = get_fast_modinfo($builder->get_course($courseid));
|
|
// Set accessibility of this item and all other items in the same course.
|
|
$builder->walk(function ($taggeditem) use ($courseid, $modinfo, $builder) {
|
|
if ($taggeditem->courseid == $courseid) {
|
|
$accessible = false;
|
|
if (($cm = $modinfo->get_cm($taggeditem->cmid)) && $cm->uservisible) {
|
|
if (empty($taggeditem->hidden)) {
|
|
$accessible = true;
|
|
} else {
|
|
$accessible = has_capability('mod/book:viewhiddenchapters', context_module::instance($cm->id));
|
|
}
|
|
}
|
|
$builder->set_accessible($taggeditem, $accessible);
|
|
}
|
|
});
|
|
}
|
|
|
|
$items = $builder->get_items();
|
|
if (count($items) > $perpage) {
|
|
$totalpages = $page + 2; // We don't need exact page count, just indicate that the next page exists.
|
|
array_pop($items);
|
|
}
|
|
|
|
// Build the display contents.
|
|
if ($items) {
|
|
$tagfeed = new core_tag\output\tagfeed();
|
|
foreach ($items as $item) {
|
|
context_helper::preload_from_record($item);
|
|
$modinfo = get_fast_modinfo($item->courseid);
|
|
$cm = $modinfo->get_cm($item->cmid);
|
|
$pageurl = new moodle_url('/mod/book/view.php', array('chapterid' => $item->id, 'b' => $item->bookid));
|
|
$pagename = format_string($item->title, true, array('context' => context_module::instance($item->cmid)));
|
|
$pagename = html_writer::link($pageurl, $pagename);
|
|
$courseurl = course_get_url($item->courseid, $cm->sectionnum);
|
|
$cmname = html_writer::link($cm->url, $cm->get_formatted_name());
|
|
$coursename = format_string($item->fullname, true, array('context' => context_course::instance($item->courseid)));
|
|
$coursename = html_writer::link($courseurl, $coursename);
|
|
$icon = html_writer::link($pageurl, html_writer::empty_tag('img', array('src' => $cm->get_icon_url())));
|
|
$tagfeed->add($icon, $pagename, $cmname.'<br>'.$coursename);
|
|
}
|
|
|
|
$content = $OUTPUT->render_from_template('core_tag/tagfeed',
|
|
$tagfeed->export_for_template($OUTPUT));
|
|
|
|
return new core_tag\output\tagindex($tag, 'mod_book', 'book_chapters', $content,
|
|
$exclusivemode, $fromctx, $ctx, $rec, $page, $totalpages);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* File browsing support class
|
|
*
|
|
* @copyright 2010-2011 Petr Skoda {@link http://skodak.org}
|
|
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
|
|
*/
|
|
class book_file_info extends file_info {
|
|
/** @var stdClass Course object */
|
|
protected $course;
|
|
/** @var stdClass Course module object */
|
|
protected $cm;
|
|
/** @var array Available file areas */
|
|
protected $areas;
|
|
/** @var string File area to browse */
|
|
protected $filearea;
|
|
|
|
/**
|
|
* Constructor
|
|
*
|
|
* @param file_browser $browser file_browser instance
|
|
* @param stdClass $course course object
|
|
* @param stdClass $cm course module object
|
|
* @param stdClass $context module context
|
|
* @param array $areas available file areas
|
|
* @param string $filearea file area to browse
|
|
*/
|
|
public function __construct($browser, $course, $cm, $context, $areas, $filearea) {
|
|
parent::__construct($browser, $context);
|
|
$this->course = $course;
|
|
$this->cm = $cm;
|
|
$this->areas = $areas;
|
|
$this->filearea = $filearea;
|
|
}
|
|
|
|
/**
|
|
* Returns list of standard virtual file/directory identification.
|
|
* The difference from stored_file parameters is that null values
|
|
* are allowed in all fields
|
|
* @return array with keys contextid, filearea, itemid, filepath and filename
|
|
*/
|
|
public function get_params() {
|
|
return array('contextid'=>$this->context->id,
|
|
'component'=>'mod_book',
|
|
'filearea' =>$this->filearea,
|
|
'itemid' =>null,
|
|
'filepath' =>null,
|
|
'filename' =>null);
|
|
}
|
|
|
|
/**
|
|
* Returns localised visible name.
|
|
* @return string
|
|
*/
|
|
public function get_visible_name() {
|
|
return $this->areas[$this->filearea];
|
|
}
|
|
|
|
/**
|
|
* Can I add new files or directories?
|
|
* @return bool
|
|
*/
|
|
public function is_writable() {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Is directory?
|
|
* @return bool
|
|
*/
|
|
public function is_directory() {
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Returns list of children.
|
|
* @return array of file_info instances
|
|
*/
|
|
public function get_children() {
|
|
return $this->get_filtered_children('*', false, true);
|
|
}
|
|
|
|
/**
|
|
* Help function to return files matching extensions or their count
|
|
*
|
|
* @param string|array $extensions, either '*' or array of lowercase extensions, i.e. array('.gif','.jpg')
|
|
* @param bool|int $countonly if false returns the children, if an int returns just the
|
|
* count of children but stops counting when $countonly number of children is reached
|
|
* @param bool $returnemptyfolders if true returns items that don't have matching files inside
|
|
* @return array|int array of file_info instances or the count
|
|
*/
|
|
private function get_filtered_children($extensions = '*', $countonly = false, $returnemptyfolders = false) {
|
|
global $DB;
|
|
$params = array('contextid' => $this->context->id,
|
|
'component' => 'mod_book',
|
|
'filearea' => $this->filearea,
|
|
'bookid' => $this->cm->instance);
|
|
$sql = 'SELECT DISTINCT bc.id, bc.pagenum
|
|
FROM {files} f, {book_chapters} bc
|
|
WHERE f.contextid = :contextid
|
|
AND f.component = :component
|
|
AND f.filearea = :filearea
|
|
AND bc.bookid = :bookid
|
|
AND bc.id = f.itemid';
|
|
if (!$returnemptyfolders) {
|
|
$sql .= ' AND filename <> :emptyfilename';
|
|
$params['emptyfilename'] = '.';
|
|
}
|
|
list($sql2, $params2) = $this->build_search_files_sql($extensions, 'f');
|
|
$sql .= ' '.$sql2;
|
|
$params = array_merge($params, $params2);
|
|
if ($countonly === false) {
|
|
$sql .= ' ORDER BY bc.pagenum';
|
|
}
|
|
|
|
$rs = $DB->get_recordset_sql($sql, $params);
|
|
$children = array();
|
|
foreach ($rs as $record) {
|
|
if ($child = $this->browser->get_file_info($this->context, 'mod_book', $this->filearea, $record->id)) {
|
|
if ($returnemptyfolders || $child->count_non_empty_children($extensions)) {
|
|
$children[] = $child;
|
|
}
|
|
}
|
|
if ($countonly !== false && count($children) >= $countonly) {
|
|
break;
|
|
}
|
|
}
|
|
$rs->close();
|
|
if ($countonly !== false) {
|
|
return count($children);
|
|
}
|
|
return $children;
|
|
}
|
|
|
|
/**
|
|
* Returns list of children which are either files matching the specified extensions
|
|
* or folders that contain at least one such file.
|
|
*
|
|
* @param string|array $extensions, either '*' or array of lowercase extensions, i.e. array('.gif','.jpg')
|
|
* @return array of file_info instances
|
|
*/
|
|
public function get_non_empty_children($extensions = '*') {
|
|
return $this->get_filtered_children($extensions, false);
|
|
}
|
|
|
|
/**
|
|
* Returns the number of children which are either files matching the specified extensions
|
|
* or folders containing at least one such file.
|
|
*
|
|
* @param string|array $extensions, for example '*' or array('.gif','.jpg')
|
|
* @param int $limit stop counting after at least $limit non-empty children are found
|
|
* @return int
|
|
*/
|
|
public function count_non_empty_children($extensions = '*', $limit = 1) {
|
|
return $this->get_filtered_children($extensions, $limit);
|
|
}
|
|
|
|
/**
|
|
* Returns parent file_info instance
|
|
* @return file_info or null for root
|
|
*/
|
|
public function get_parent() {
|
|
return $this->browser->get_file_info($this->context);
|
|
}
|
|
}
|
|
|