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lib.php
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lib.php
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<?php // $Id: lib.php,v 1.4 2006/08/28 16:41:20 mark-nielsen Exp $
/**
* Library of functions and constants for module decisiontree
*
* @author
* @version $Id: lib.php,v 1.4 2006/08/28 16:41:20 mark-nielsen Exp $
* @package decisiontree
*
* Copyright (C) 2011, Andre Scherl
* You should have received a copy of the GNU General Public License
* along with DASIS. If not, see <http://www.gnu.org/licenses/>.
*/
$decisiontree_CONSTANT = 7; /// for example
/**
* Given an object containing all the necessary data,
* (defined by the form in mod.html) this function
* will create a new instance and return the id number
* of the new instance.
*
* @param object $instance An object from the form in mod.html
* @return int The id of the newly inserted decisiontree record
**/
function decisiontree_add_instance($decisiontree) {
global $DB;
$decisiontree->timemodified = time();
# May have to add extra stuff in here #
return $DB->insert_record("decisiontree", $decisiontree);
}
/**
* Given an object containing all the necessary data,
* (defined by the form in mod.html) this function
* will update an existing instance with new data.
*
* @param object $instance An object from the form in mod.html
* @return boolean Success/Fail
**/
function decisiontree_update_instance($decisiontree) {
global $DB;
$decisiontree->timemodified = time();
$decisiontree->id = $decisiontree->instance;
# May have to add extra stuff in here #
return $DB->update_record("decisiontree", $decisiontree);
}
/**
* Given an ID of an instance of this module,
* this function will permanently delete the instance
* and any data that depends on it.
*
* @param int $id Id of the module instance
* @return boolean Success/Failure
**/
function decisiontree_delete_instance($id) {
global $DB;
if (! $decisiontree = $DB->get_record("decisiontree", array("id"=>$id))) {
return false;
}
$result = true;
# Delete any dependent records here #
if (! $DB->delete_records("decisiontree", array("id" => $decisiontree->id))) {
$result = false;
}
return $result;
}
/**
* Return a small object with summary information about what a
* user has done with a given particular instance of this module
* Used for user activity reports.
* $return->time = the time they did it
* $return->info = a short text description
*
* @return null
* @todo Finish documenting this function
**/
function decisiontree_user_outline($course, $user, $mod, $decisiontree) {
return $return;
}
/**
* Print a detailed representation of what a user has done with
* a given particular instance of this module, for user activity reports.
*
* @return boolean
* @todo Finish documenting this function
**/
function decisiontree_user_complete($course, $user, $mod, $decisiontree) {
return true;
}
/**
* Given a course and a time, this module should find recent activity
* that has occurred in decisiontree activities and print it out.
* Return true if there was output, or false is there was none.
*
* @uses $CFG
* @return boolean
* @todo Finish documenting this function
**/
function decisiontree_print_recent_activity($course, $isteacher, $timestart) {
global $CFG;
return false; // True if anything was printed, otherwise false
}
/**
* Function to be run periodically according to the moodle cron
* This function searches for things that need to be done, such
* as sending out mail, toggling flags etc ...
*
* @uses $CFG
* @return boolean
* @todo Finish documenting this function
**/
function decisiontree_cron () {
global $CFG;
return true;
}
/**
* Must return an array of grades for a given instance of this module,
* indexed by user. It also returns a maximum allowed grade.
*
* Example:
* $return->grades = array of grades;
* $return->maxgrade = maximum allowed grade;
*
* return $return;
*
* @param int $decisiontreeid ID of an instance of this module
* @return mixed Null or object with an array of grades and with the maximum grade
**/
function decisiontree_grades($decisiontreeid) {
return NULL;
}
/**
* Must return an array of user records (all data) who are participants
* for a given instance of decisiontree. Must include every user involved
* in the instance, independient of his role (student, teacher, admin...)
* See other modules as example.
*
* @param int $decisiontreeid ID of an instance of this module
* @return mixed boolean/array of students
**/
function decisiontree_get_participants($decisiontreeid) {
return false;
}
/**
* This function returns if a scale is being used by one decisiontree
* it it has support for grading and scales. Commented code should be
* modified if necessary. See forum, glossary or journal modules
* as reference.
*
* @param int $decisiontreeid ID of an instance of this module
* @return mixed
* @todo Finish documenting this function
**/
function decisiontree_scale_used ($decisiontreeid,$scaleid) {
$return = false;
//$rec = get_record("decisiontree","id","$decisiontreeid","scale","-$scaleid");
//
//if (!empty($rec) && !empty($scaleid)) {
// $return = true;
//}
return $return;
}
//////////////////////////////////////////////////////////////////////////////////////
/// Any other decisiontree functions go here. Each of them must have a name that
/// starts with decisiontree_
function decisiontree_supports($feature) {
switch($feature) {
case FEATURE_BACKUP_MOODLE2:
return true;
default: return null;
}
}
?>