tag/index.php

   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
  25 require_once('../config.php');
  26 require_once($CFG->dirroot . '/lib/weblib.php');
  27 require_once($CFG->dirroot . '/blog/lib.php');
  28
  29 require_login();
  30
  31 if (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 $systemcontext   = context_system::instance();
  47
  48 if ($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 }
  67 unset($tagid);
  68 if (empty($tag)) {
  69     redirect(new moodle_url('/tag/search.php'));
  70 }
  71
  72 if ($ctx && ($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 = '';
  89 if (has_capability('moodle/tag:manage', context_system::instance())) {
  90     $buttons .= $OUTPUT->single_button(new moodle_url('/tag/manage.php'),
  91             get_string('managetags', 'tag'), 'GET');
  92 }
  93 if ($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);
 107 if ($tagareaid) {
 108     $tagareas = array_intersect_key($tagareas, array($tagareaid => 1));
 109 }
 110 if (!$tagareaid && count($tagareas) == 1) {
 111     // Automatically set "exclusive" mode for tag collection with one tag area only.
 112     $exclusivemode = 1;
 113 }
 114 $entities = array();
 115 foreach ($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
 124 echo $OUTPUT->header();
 125 echo $pagecontents;
 126 echo $OUTPUT->footer();