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<?php
define('BGR_RANDOMLY', '0');
define('BGR_LASTMODIFIED', '1');
define('BGR_NEXTONE', '2');
class block_glossary_random extends block_base {
function init() {
$this->title = get_string('pluginname','block_glossary_random');
}
function specialization() {
global $CFG, $DB;
require_once($CFG->libdir . '/filelib.php');
$this->course = $this->page->course;
// load userdefined title and make sure it's never empty
if (empty($this->config->title)) {
$this->title = get_string('pluginname','block_glossary_random');
} else {
$this->title = $this->config->title;
}
if (empty($this->config->glossary)) {
return false;
}
if (!isset($this->config->nexttime)) {
$this->config->nexttime = 0;
}
//check if it's time to put a new entry in cache
if (time() > $this->config->nexttime) {
// place glossary concept and definition in $pref->cache
if (!$numberofentries = $DB->count_records('glossary_entries',
array('glossaryid'=>$this->config->glossary, 'approved'=>1))) {
$this->config->cache = get_string('noentriesyet','block_glossary_random');
$this->instance_config_commit();
}
// Get module and context, to be able to rewrite urls
if (! $cm = get_coursemodule_from_instance("glossary", $this->config->glossary, $this->course->id)) {
return false;
}
$glossaryctx = get_context_instance(CONTEXT_MODULE, $cm->id);
$limitfrom = 0;
$limitnum = 1;
switch ($this->config->type) {
case BGR_RANDOMLY:
$i = rand(1,$numberofentries);
$limitfrom = $i-1;
$SORT = 'ASC';
break;
case BGR_NEXTONE:
if (isset($this->config->previous)) {
$i = $this->config->previous + 1;
} else {
$i = 1;
}
if ($i > $numberofentries) { // Loop back to beginning
$i = 1;
}
$limitfrom = $i-1;
$SORT = 'ASC';
break;
default: // BGR_LASTMODIFIED
$i = $numberofentries;
$limitfrom = 0;
$SORT = 'DESC';
break;
}
if ($entry = $DB->get_records_sql("SELECT id, concept, definition, definitionformat, definitiontrust
FROM {glossary_entries}
WHERE glossaryid = ? AND approved = 1
ORDER BY timemodified $SORT", array($this->config->glossary), $limitfrom, $limitnum)) {
$entry = reset($entry);
if (empty($this->config->showconcept)) {
$text = '';
} else {
$text = "<h3>".format_string($entry->concept,true)."</h3>";
}
$options = new stdClass();
$options->trusted = $entry->definitiontrust;
$options->overflowdiv = true;
$entry->definition = file_rewrite_pluginfile_urls($entry->definition, 'pluginfile.php', $glossaryctx->id, 'mod_glossary', 'entry', $entry->id);
$text .= format_text($entry->definition, $entry->definitionformat, $options);
$this->config->nexttime = usergetmidnight(time()) + DAYSECS * $this->config->refresh;
$this->config->previous = $i;
} else {
$text = get_string('noentriesyet','block_glossary_random');
}
// store the text
$this->config->cache = $text;
$this->instance_config_commit();
}
}
function instance_allow_multiple() {
// Are you going to allow multiple instances of each block?
// If yes, then it is assumed that the block WILL USE per-instance configuration
return true;
}
function get_content() {
global $USER, $CFG, $DB;
if (empty($this->config->glossary)) {
$this->content->text = get_string('notyetconfigured','block_glossary_random');
$this->content->footer = '';
return $this->content;
}
$glossaryid = $this->config->glossary;
$course = $this->page->course;
require_once($CFG->dirroot.'/course/lib.php');
$modinfo = get_fast_modinfo($course);
if (!isset($modinfo->instances['glossary'][$glossaryid])) {
// we can get here if the glossary has been deleted, so
// unconfigure the glossary from the block..
$this->config->glossary = 0;
$this->config->cache = '';
$this->instance_config_commit();
$this->content->text = get_string('notyetconfigured','block_glossary_random');
$this->content->footer = '';
return $this->content;
}
$cm = $modinfo->instances['glossary'][$glossaryid];
if (empty($this->config->cache)) {
$this->config->cache = '';
}
if ($this->content !== NULL) {
return $this->content;
}
$this->content = new stdClass;
$this->content->text = $this->config->cache;
// place link to glossary in the footer if the glossary is visible
//Obtain the visible property from the instance
if ($cm->uservisible) {
if (has_capability('mod/glossary:write', get_context_instance(CONTEXT_MODULE, $cm->id))) {
$this->content->footer = '<a href="'.$CFG->wwwroot.'/mod/glossary/edit.php?cmid='.$cm->id
.'" title="'.$this->config->addentry.'">'.$this->config->addentry.'</a><br />';
} else {
$this->content->footer = '';
}
$this->content->footer .= '<a href="'.$CFG->wwwroot.'/mod/glossary/view.php?id='.$cm->id
.'" title="'.$this->config->viewglossary.'">'.$this->config->viewglossary.'</a>';
// otherwise just place some text, no link
} else {
$this->content->footer = $this->config->invisible;
}
return $this->content;
}
function hide_header() {
if (empty($this->config->title)) {
return true;
}
return false;
}
}
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