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<?php // $Id$
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('blockname','block_glossary_random');
$this->version = 2007101509;
}
function specialization() {
global $CFG, $COURSE;
$this->course = $COURSE;
// load userdefined title and make sure it's never empty
if (empty($this->config->title)) {
$this->title = get_string('blockname','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 = count_records('glossary_entries','glossaryid',$this->config->glossary,
'approved',1)) {
$this->config->cache = get_string('noentriesyet','block_glossary_random');
$this->instance_config_commit();
}
$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 = get_records_sql(' SELECT concept, definition, format '.
' FROM '.$CFG->prefix.'glossary_entries'.
' WHERE glossaryid = '.$this->config->glossary.
' AND approved = 1 '.
'ORDER BY timemodified '.$SORT, $limitfrom, $limitnum)) {
$entry = reset($entry);
if (empty($this->config->showconcept)) {
$text = '';
} else {
$text = "<h3>".format_string($entry->concept,true)."</h3>";
}
$options = new object;
$options->trusttext = true;
$text .= format_text($entry->definition, $entry->format, $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 instance_config_print() {
global $CFG;
if (!isset($this->config)) {
// ... teacher has not yet configured the block, let's put some default values here to explain things
$this->config->title = get_string('blockname','block_glossary_random');
$this->config->refresh = 0;
$this->config->showconcept = 1;
$this->config->cache= get_string('notyetconfigured','block_glossary_random');
$this->config->addentry=get_string('addentry', 'block_glossary_random');
$this->config->viewglossary=get_string('viewglossary', 'block_glossary_random');
$this->config->invisible=get_string('invisible', 'block_glossary_random');
}
// select glossaries to put in dropdown box ...
$glossaries = get_records_select_menu('glossary', 'course='.$this->course->id,'name','id,name');
//format menu texts to avoid html and to filter multilang values
if(!empty($glossaries)) {
foreach($glossaries as $key => $value) {
$glossaries[$key] = strip_tags(format_string($value,true));
}
}
// and select quotetypes to put in dropdown box
$type[0] = get_string('random','block_glossary_random');
$type[1] = get_string('lastmodified','block_glossary_random');
$type[2] = get_string('nextone','block_glossary_random');
$this->config->nexttime = usergetmidnight(time()) + DAYSECS * $this->config->refresh;
// display the form
if (is_file($CFG->dirroot .'/blocks/'. $this->name() .'/config_instance.html')) {
print_simple_box_start('center', '', '', 5, 'blockconfigglobal');
include($CFG->dirroot .'/blocks/'. $this->name() .'/config_instance.html');
print_simple_box_end();
} else {
notice(get_string('blockconfigbad'), str_replace('blockaction=', 'dummy=', qualified_me()));
}
return true;
}
function get_content() {
global $USER, $CFG, $COURSE;
if (empty($this->config->glossary)) {
$this->content->text = get_string('notyetconfigured','block_glossary_random');
$this->content->footer = '';
return $this->content;
}
$glossaryid = $this->config->glossary;
if ($this->course->id == $COURSE->id) {
$course = $COURSE;
} else {
$course = get_record('course', 'id', $this->course->id);
}
require_once($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?id='.$cm->id
.'" title="'.$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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