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lib.php
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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Library of interface functions and constants for module simplevideo
*
* All the core Moodle functions, neeeded to allow the module to work
* integrated in Moodle should be placed here.
*
* All the simplevideo specific functions, needed to implement all the module
* logic, should go to locallib.php. This will help to save some memory when
* Moodle is performing actions across all modules.
*
* @package mod_simplevideo
* @copyright 2016 Takayuki Fuwa
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
define('simplevideo_ULTIMATE_ANSWER', 42);
/* Moodle core API */
/**
* Returns the information on whether the module supports a feature
*
* See {@link plugin_supports()} for more info.
*
* @param string $feature FEATURE_xx constant for requested feature
* @return mixed true if the feature is supported, null if unknown
*/
function simplevideo_supports($feature) {
switch($feature) {
case FEATURE_MOD_INTRO:
return true;
case FEATURE_SHOW_DESCRIPTION:
return true;
case FEATURE_GRADE_HAS_GRADE:
return true;
case FEATURE_BACKUP_MOODLE2:
return true;
default:
return null;
}
}
/**
* Saves a new instance of the simplevideo into the database
*
* Given an object containing all the necessary data,
* (defined by the form in mod_form.php) this function
* will create a new instance and return the id number
* of the new instance.
*
* @param stdClass $simplevideo Submitted data from the form in mod_form.php
* @param mod_simplevideo_mod_form $mform The form instance itself (if needed)
* @return int The id of the newly inserted simplevideo record
*/
function simplevideo_add_instance(stdClass $simplevideo, mod_simplevideo_mod_form $mform = null) {
global $DB;
$simplevideo->timecreated = time();
$simplevideo->id = $DB->insert_record('simplevideo', $simplevideo);
simplevideo_grade_item_update($simplevideo);
return $simplevideo->id;
}
/**
* Updates an instance of the simplevideo in the database
*
* Given an object containing all the necessary data,
* (defined by the form in mod_form.php) this function
* will update an existing instance with new data.
*
* @param stdClass $simplevideo An object from the form in mod_form.php
* @param mod_simplevideo_mod_form $mform The form instance itself (if needed)
* @return boolean Success/Fail
*/
function simplevideo_update_instance(stdClass $simplevideo, mod_simplevideo_mod_form $mform = null) {
global $DB;
$simplevideo->timemodified = time();
$simplevideo->id = $simplevideo->instance;
$result = $DB->update_record('simplevideo', $simplevideo);
simplevideo_grade_item_update($simplevideo);
return $result;
}
/**
* Removes an instance of the simplevideo from the database
*
* 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 $id Id of the module instance
* @return boolean Success/Failure
*/
function simplevideo_delete_instance($id) {
global $DB;
if (! $simplevideo = $DB->get_record('simplevideo', array('id' => $id))) {
return false;
}
$DB->delete_records('simplevideo', array('id' => $simplevideo->id));
simplevideo_grade_item_delete($simplevideo);
return true;
}
/**
* Returns 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
*
* @param stdClass $course The course record
* @param stdClass $user The user record
* @param cm_info|stdClass $mod The course module info object or record
* @param stdClass $simplevideo The simplevideo instance record
* @return stdClass|null
*/
function simplevideo_user_outline($course, $user, $mod, $simplevideo) {
$return = new stdClass();
$return->time = 0;
$return->info = '';
return $return;
}
/**
* Prints a detailed representation of what a user has done with
* a given particular instance of this module, for user activity reports.
*
* It is supposed to echo directly without returning a value.
*
* @param stdClass $course the current course record
* @param stdClass $user the record of the user we are generating report for
* @param cm_info $mod course module info
* @param stdClass $simplevideo the module instance record
*/
function simplevideo_user_complete($course, $user, $mod, $simplevideo) {
}
/**
* Given a course and a time, this module should find recent activity
* that has occurred in simplevideo activities and print it out.
*
* @param stdClass $course The course record
* @param bool $viewfullnames Should we display full names
* @param int $timestart Print activity since this timestamp
* @return boolean True if anything was printed, otherwise false
*/
function simplevideo_print_recent_activity($course, $viewfullnames, $timestart) {
return false;
}
/**
* Prepares the recent activity data
*
* This callback function is supposed to populate the passed array with
* custom activity records. These records are then rendered into HTML via
* {@link simplevideo_print_recent_mod_activity()}.
*
* Returns void, it adds items into $activities and increases $index.
*
* @param array $activities sequentially indexed array of objects with added 'cmid' property
* @param int $index the index in the $activities to use for the next record
* @param int $timestart append activity since this time
* @param int $courseid the id of the course we produce the report for
* @param int $cmid course module id
* @param int $userid check for a particular user's activity only, defaults to 0 (all users)
* @param int $groupid check for a particular group's activity only, defaults to 0 (all groups)
*/
function simplevideo_get_recent_mod_activity(&$activities, &$index, $timestart, $courseid, $cmid, $userid=0, $groupid=0) {
}
/**
* Prints single activity item prepared by {@link simplevideo_get_recent_mod_activity()}
*
* @param stdClass $activity activity record with added 'cmid' property
* @param int $courseid the id of the course we produce the report for
* @param bool $detail print detailed report
* @param array $modnames as returned by {@link get_module_types_names()}
* @param bool $viewfullnames display users' full names
*/
function simplevideo_print_recent_mod_activity($activity, $courseid, $detail, $modnames, $viewfullnames) {
}
/**
* 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 ...
*
* Note that this has been deprecated in favour of scheduled task API.
*
* @return boolean
*/
function simplevideo_cron () {
return false;
}
/**
* Returns all other caps used in the module
*
* For example, this could be array('moodle/site:accessallgroups') if the
* module uses that capability.
*
* @return array
*/
function simplevideo_get_extra_capabilities() {
return array();
}
/* Gradebook API */
/**
* Is a given scale used by the instance of simplevideo?
*
* This function returns if a scale is being used by one simplevideo
* if it has support for grading and scales.
*
* @param int $simplevideoid ID of an instance of this module
* @param int $scaleid ID of the scale
* @return bool true if the scale is used by the given simplevideo instance
*/
function simplevideo_scale_used($simplevideoid, $scaleid) {
global $DB;
if ($scaleid and $DB->record_exists('simplevideo', array('id' => $simplevideoid, 'grade' => -$scaleid))) {
return true;
} else {
return false;
}
}
/**
* Checks if scale is being used by any instance of simplevideo.
*
* This is used to find out if scale used anywhere.
*
* @param int $scaleid ID of the scale
* @return boolean true if the scale is used by any simplevideo instance
*/
function simplevideo_scale_used_anywhere($scaleid) {
global $DB;
if ($scaleid and $DB->record_exists('simplevideo', array('grade' => -$scaleid))) {
return true;
} else {
return false;
}
}
/**
* Creates or updates grade item for the given simplevideo instance
*
* Needed by {@link grade_update_mod_grades()}.
*
* @param stdClass $simplevideo instance object with extra cmidnumber and modname property
* @param bool $reset reset grades in the gradebook
* @return void
*/
function simplevideo_grade_item_update(stdClass $simplevideo, $reset=false) {
global $CFG;
require_once($CFG->libdir.'/gradelib.php');
$item = array();
$item['itemname'] = clean_param($simplevideo->name, PARAM_NOTAGS);
$item['gradetype'] = GRADE_TYPE_VALUE;
if ($simplevideo->grade > 0) {
$item['gradetype'] = GRADE_TYPE_VALUE;
$item['grademax'] = $simplevideo->grade;
$item['grademin'] = 0;
} else if ($simplevideo->grade < 0) {
$item['gradetype'] = GRADE_TYPE_SCALE;
$item['scaleid'] = -$simplevideo->grade;
} else {
$item['gradetype'] = GRADE_TYPE_NONE;
}
if ($reset) {
$item['reset'] = true;
}
grade_update('mod/simplevideo', $simplevideo->course, 'mod', 'simplevideo',
$simplevideo->id, 0, null, $item);
}
/**
* Delete grade item for given simplevideo instance
*
* @param stdClass $simplevideo instance object
* @return grade_item
*/
function simplevideo_grade_item_delete($simplevideo) {
global $CFG;
require_once($CFG->libdir.'/gradelib.php');
return grade_update('mod/simplevideo', $simplevideo->course, 'mod', 'simplevideo',
$simplevideo->id, 0, null, array('deleted' => 1));
}
/**
* Update simplevideo grades in the gradebook
*
* Needed by {@link grade_update_mod_grades()}.
*
* @param stdClass $simplevideo instance object with extra cmidnumber and modname property
* @param int $userid update grade of specific user only, 0 means all participants
*/
function simplevideo_update_grades(stdClass $simplevideo, $userid = 0) {
global $CFG, $DB;
require_once($CFG->libdir.'/gradelib.php');
// Populate array of grade objects indexed by userid.
$grades = array();
grade_update('mod/simplevideo', $simplevideo->course, 'mod', 'simplevideo', $simplevideo->id, 0, $grades);
}
/* File API */
/**
* Returns the lists of all browsable file areas within the given module context
*
* The file area 'intro' for the activity introduction field is added automatically
* by {@link file_browser::get_file_info_context_module()}
*
* @param stdClass $course
* @param stdClass $cm
* @param stdClass $context
* @return array of [(string)filearea] => (string)description
*/
function simplevideo_get_file_areas($course, $cm, $context) {
return array();
}
/**
* File browsing support for simplevideo file areas
*
* @package mod_simplevideo
* @category files
*
* @param file_browser $browser
* @param array $areas
* @param stdClass $course
* @param stdClass $cm
* @param stdClass $context
* @param string $filearea
* @param int $itemid
* @param string $filepath
* @param string $filename
* @return file_info instance or null if not found
*/
function simplevideo_get_file_info($browser, $areas, $course, $cm, $context, $filearea, $itemid, $filepath, $filename) {
return null;
}
/**
* Serves the files from the simplevideo file areas
*
* @package mod_simplevideo
* @category files
*
* @param stdClass $course the course object
* @param stdClass $cm the course module object
* @param stdClass $context the simplevideo's context
* @param string $filearea the name of the file area
* @param array $args extra arguments (itemid, path)
* @param bool $forcedownload whether or not force download
* @param array $options additional options affecting the file serving
*/
function simplevideo_pluginfile($course, $cm, $context, $filearea, array $args, $forcedownload, array $options=array()) {
global $DB, $CFG;
if ($context->contextlevel != CONTEXT_MODULE) {
send_file_not_found();
}
require_login($course, true, $cm);
send_file_not_found();
}
/* Navigation API */
/**
* Extends the global navigation tree by adding simplevideo nodes if there is a relevant content
*
* This can be called by an AJAX request so do not rely on $PAGE as it might not be set up properly.
*
* @param navigation_node $navref An object representing the navigation tree node of the simplevideo module instance
* @param stdClass $course current course record
* @param stdClass $module current simplevideo instance record
* @param cm_info $cm course module information
*/
function simplevideo_extend_navigation(navigation_node $navref, stdClass $course, stdClass $module, cm_info $cm) {
// TODO Delete this function and its docblock, or implement it.
}
/**
* Extends the settings navigation with the simplevideo settings
*
* This function is called when the context for the page is a simplevideo module. This is not called by AJAX
* so it is safe to rely on the $PAGE.
*
* @param settings_navigation $settingsnav complete settings navigation tree
* @param navigation_node $simplevideonode simplevideo administration node
*/
function simplevideo_extend_settings_navigation(settings_navigation $settingsnav, navigation_node $simplevideonode=null) {
// TODO Delete this function and its docblock, or implement it.
}