1<?php 2// This file is part of Moodle - http://moodle.org/ 3// 4// Moodle is free software: you can redistribute it and/or modify 5// it under the terms of the GNU General Public License as published by 6// the Free Software Foundation, either version 3 of the License, or 7// (at your option) any later version. 8// 9// Moodle is distributed in the hope that it will be useful, 10// but WITHOUT ANY WARRANTY; without even the implied warranty of 11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12// GNU General Public License for more details. 13// 14// You should have received a copy of the GNU General Public License 15// along with Moodle. If not, see <http://www.gnu.org/licenses/>. 16 17 18/** 19 * @package core_tag 20 * @category tag 21 * @copyright 2007 Luiz Cruz <luiz.laydner@gmail.com> 22 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later 23 */ 24 25require_once('../config.php'); 26require_once($CFG->dirroot . '/lib/weblib.php'); 27require_once($CFG->dirroot . '/blog/lib.php'); 28 29require_login(); 30 31if (empty($CFG->usetags)) { 32 print_error('tagsaredisabled', 'tag'); 33} 34 35$tagid = optional_param('id', 0, PARAM_INT); // tag id 36$tagname = optional_param('tag', '', PARAM_TAG); // tag 37$tagareaid = optional_param('ta', 0, PARAM_INT); // Tag area id. 38$exclusivemode = optional_param('excl', 0, PARAM_BOOL); // Exclusive mode (show entities in one tag area only). 39$page = optional_param('page', 0, PARAM_INT); // Page to display. 40$fromctx = optional_param('from', null, PARAM_INT); 41$ctx = optional_param('ctx', null, PARAM_INT); 42$rec = optional_param('rec', 1, PARAM_INT); 43 44$edit = optional_param('edit', -1, PARAM_BOOL); 45 46$systemcontext = context_system::instance(); 47 48if ($tagname) { 49 $tagcollid = optional_param('tc', 0, PARAM_INT); 50 if (!$tagcollid) { 51 // Tag name specified but tag collection was not. Try to guess it. 52 $tags = core_tag_tag::guess_by_name($tagname, '*'); 53 if (count($tags) > 1) { 54 // This tag was found in more than one collection, redirect to search. 55 redirect(new moodle_url('/tag/search.php', array('query' => $tagname))); 56 } else if (count($tags) == 1) { 57 $tag = reset($tags); 58 } 59 } else { 60 if (!$tag = core_tag_tag::get_by_name($tagcollid, $tagname, '*')) { 61 redirect(new moodle_url('/tag/search.php', array('tc' => $tagcollid, 'query' => $tagname))); 62 } 63 } 64} else if ($tagid) { 65 $tag = core_tag_tag::get($tagid, '*'); 66} 67unset($tagid); 68if (empty($tag)) { 69 redirect(new moodle_url('/tag/search.php')); 70} 71 72if ($ctx && ($context = context::instance_by_id($ctx, IGNORE_MISSING)) && $context->contextlevel >= CONTEXT_COURSE) { 73 list($context, $course, $cm) = get_context_info_array($context->id); 74 require_login($course, false, $cm, false, true); 75} else { 76 $PAGE->set_context($systemcontext); 77} 78 79$tagcollid = $tag->tagcollid; 80 81$PAGE->set_url($tag->get_view_url($exclusivemode, $fromctx, $ctx, $rec)); 82$PAGE->set_subpage($tag->id); 83$tagnode = $PAGE->navigation->find('tags', null); 84$tagnode->make_active(); 85$PAGE->set_pagelayout('standard'); 86$PAGE->set_blocks_editing_capability('moodle/tag:editblocks'); 87 88$buttons = ''; 89if (has_capability('moodle/tag:manage', context_system::instance())) { 90 $buttons .= $OUTPUT->single_button(new moodle_url('/tag/manage.php'), 91 get_string('managetags', 'tag'), 'GET'); 92} 93if ($PAGE->user_allowed_editing()) { 94 if ($edit != -1) { 95 $USER->editing = $edit; 96 } 97 $buttons .= $OUTPUT->edit_button(clone($PAGE->url)); 98} 99 100$PAGE->navbar->add($tagname); 101$PAGE->set_title(get_string('tag', 'tag') .' - '. $tag->get_display_name()); 102$PAGE->set_heading($COURSE->fullname); 103$PAGE->set_button($buttons); 104 105// Find all areas in this collection and their items tagged with this tag. 106$tagareas = core_tag_collection::get_areas($tagcollid); 107if ($tagareaid) { 108 $tagareas = array_intersect_key($tagareas, array($tagareaid => 1)); 109} 110if (!$tagareaid && count($tagareas) == 1) { 111 // Automatically set "exclusive" mode for tag collection with one tag area only. 112 $exclusivemode = 1; 113} 114$entities = array(); 115foreach ($tagareas as $ta) { 116 $entities[] = $tag->get_tag_index($ta, $exclusivemode, $fromctx, $ctx, $rec, $page); 117} 118$entities = array_filter($entities); 119 120$tagrenderer = $PAGE->get_renderer('core', 'tag'); 121$pagecontents = $tagrenderer->tag_index_page($tag, array_filter($entities), $tagareaid, 122 $exclusivemode, $fromctx, $ctx, $rec, $page); 123 124echo $OUTPUT->header(); 125echo $pagecontents; 126echo $OUTPUT->footer(); 127