moodle_local_treestudyplan/classes/studyplan.php

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<?php
namespace local_treestudyplan;
require_once($CFG->libdir.'/externallib.php');
class studyplan {
const TABLE = "local_treestudyplan";
private static $STUDYPLAN_CACHE = [];
private $r; // Holds database record
private $id;
private $aggregator;
private $context = null; // Hold context object once retrieved
private $linked_userids = null; // cache lookup of linked users (saves queries)
private $page_cache = null;
public function aggregator(){
return $this->aggregator;
}
// Cache constructors to avoid multiple creation events in one session.
public static function findById($id): self {
if(!array_key_exists($id,self::$STUDYPLAN_CACHE)){
self::$STUDYPLAN_CACHE[$id] = new self($id);
}
return self::$STUDYPLAN_CACHE[$id];
}
private function __construct($id) {
global $DB;
$this->id = $id;
$this->r = $DB->get_record(self::TABLE,['id' => $id]);
$this->aggregator = aggregator::createOrDefault($this->r->aggregation, $this->r->aggregation_config);
}
public function id(){
return $this->id;
}
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public function shortname(){
return $this->r->shortname;
}
public function name(){
return $this->r->name;
}
public function pages(){
// cached version of find_studyplan_children.
// (may be premature optimization, since
// find_studyplan_children also does some caching)
if(empty($this->page_cache)){
$this->page_cache = studyplanpage::find_studyplan_children($this);
}
return $this->page_cache;
}
/**
* Return the context this studyplan is associated to
*/
public function context(): \context{
if(!isset($this->context)){
try{
$this->context = contextinfo::by_id($this->r->context_id)->context;
}
catch(\dml_missing_record_exception $x){
throw new \InvalidArgumentException("Context {$this->r->context_id} not available"); // Just throw it up again. catch is included here to make sure we know it throws this exception
}
}
return $this->context;
}
public static function simple_structure($value=VALUE_REQUIRED){
return new \external_single_structure([
"id" => new \external_value(PARAM_INT, 'id of studyplan'),
"name" => new \external_value(PARAM_TEXT, 'name of studyplan'),
"shortname"=> new \external_value(PARAM_TEXT, 'shortname of studyplan'),
"context_id" => new \external_value(PARAM_INT, 'context_id of studyplan'),
"description"=> new \external_value(PARAM_TEXT, 'description of studyplan'),
"aggregation" => new \external_value(PARAM_TEXT, 'selected aggregator'),
"aggregation_config" => new \external_value(PARAM_TEXT, 'config string for aggregator'),
"aggregation_info" => aggregator::basic_structure(),
"pages" => new \external_multiple_structure(studyplanpage::simple_structure(),'pages'),
],'Basic studyplan info',$value);
}
public function simple_model(){
$pages = [];
foreach($this->pages() as $p){
$pages[] = $p->simple_model();
}
return [
'id' => $this->r->id,
'name' => $this->r->name,
'shortname' => $this->r->shortname,
'context_id' => $this->context()->id,
'description' => $this->r->description,
'aggregation' => $this->r->aggregation,
'aggregation_config' => $this->aggregator->config_string(),
'aggregation_info' => $this->aggregator->basic_model(),
'pages' => $pages,
];
}
public static function editor_structure($value=VALUE_REQUIRED){
return new \external_single_structure([
"id" => new \external_value(PARAM_INT, 'id of studyplan'),
"name" => new \external_value(PARAM_TEXT, 'name of studyplan'),
"shortname"=> new \external_value(PARAM_TEXT, 'shortname of studyplan'),
"description"=> new \external_value(PARAM_TEXT, 'description of studyplan'),
"context_id" => new \external_value(PARAM_INT, 'context_id of studyplan'),
"aggregation" => new \external_value(PARAM_TEXT, 'selected aggregator'),
"aggregation_config" => new \external_value(PARAM_TEXT, 'config string for aggregator'),
"aggregation_info" => aggregator::basic_structure(),
"pages" => new \external_multiple_structure(studyplanpage::editor_structure()),
"advanced" => new \external_single_structure([
"force_scales" => new \external_single_structure([
"scales" => new \external_multiple_structure(new \external_single_structure([
"id" => new \external_value(PARAM_INT, 'id of scale'),
"name" => new \external_value(PARAM_TEXT, 'name of scale'),
])),
],"Scale forcing on stuff", VALUE_OPTIONAL),
],"Advanced features available", VALUE_OPTIONAL),
],'Studyplan full structure',$value);
}
public function editor_model(){
global $DB;
$model = [
'id' => $this->r->id,
'name' => $this->r->name,
'shortname' => $this->r->shortname,
'description' => $this->r->description,
'context_id' => $this->context()->id,
"aggregation" => $this->r->aggregation,
"aggregation_config" => $this->aggregator->config_string(),
'aggregation_info' => $this->aggregator->basic_model(),
'pages' => [],
];
foreach($this->pages() as $p)
{
$model['pages'][] = $p->editor_model();
}
if(has_capability('local/treestudyplan:forcescales', \context_system::instance())){
if(!array_key_exists('advanced',$model)){
// Create advanced node if it does not exist
$model['advanced'] = [];
}
// get a list of available scales
$scales = array_map( function($scale){
return [ "id" => $scale->id, "name" => $scale->name,];
}, \grade_scale::fetch_all(array('courseid'=>0)) ) ;
$model['advanced']['force_scales'] = [
'scales' => $scales,
];
}
return $model;
}
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public static function add($fields,$bare=false){
global $CFG, $DB;
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$addable = ['name','shortname','description','context_id','aggregation','aggregation_config'];
$info = ['enddate' => null ];
foreach($addable as $f){
if(array_key_exists($f,$fields)){
$info[$f] = $fields[$f];
}
}
$id = $DB->insert_record(self::TABLE, $info);
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$plan = self::findById($id); // make sure the new studyplan is immediately cached
// Start temporary skräpp code
// Add a single page and copy the names.This keeps the data sane until the upgrade to
// real page management is done
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// On import, adding an empty page messes things up for now, so we have an option to skip this....
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// TODO: Remove this when proper page management is implemented
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if(!$bare){
$pageaddable = ['name','shortname','description',];
$pageinfo = ['studyplan_id' => $id];
foreach($pageaddable as $f){
if(array_key_exists($f,$fields)){
if($f == "name"){
$pageinfo["fullname"] = $fields[$f];
} else {
$pageinfo[$f] = $fields[$f];
}
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}
}
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$page = studyplanpage::add($pageinfo);
$plan->page_cache = [$page];
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}
// End temporary skräpp code
return $plan;
}
public function edit($fields){
global $DB;
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$editable = ['name','shortname','description','context_id','periods','startdate','enddate','aggregation','aggregation_config'];
$info = ['id' => $this->id,];
foreach($editable as $f){
if(array_key_exists($f,$fields)){
$info[$f] = $fields[$f];
}
}
$DB->update_record(self::TABLE, $info);
//reload record after edit
$this->r = $DB->get_record(self::TABLE,['id' => $this->id],"*",MUST_EXIST);
//reload the context...
$this->context = null;
$this->context();
// reload aggregator
$this->aggregator = aggregator::createOrDefault($this->r->aggregation, $this->r->aggregation_config);
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// Start temporary skräpp code
// TODO: Until proper page editing is implemented, copy data from studyplan to it's first page
// This keeps the data sane until the upgrade is done.
if(count($this->pages()) == 1){
// update the info to the page as well
$page = $this->pages()[0];
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$pageeditable = ['name','shortname','description'];
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$pageinfo = [];
foreach($pageeditable as $f){
if(array_key_exists($f,$fields)){
if($f == "name"){
$pageinfo["fullname"] = $fields[$f];
}else {
$pageinfo[$f] = $fields[$f];
}
}
}
$page->edit($pageinfo);
}
// End temporary skräpp code
return $this;
}
public function delete($force=false){
global $DB;
if($force){
$children = studyplanpage::find_studyplan_children($this);
foreach($children as $c){
$c->delete($force);
}
}
if($DB->count_records('local_treestudyplan_page',['studyplan_id' => $this->id]) > 0){
return success::fail('cannot delete studyplan that still has pages');
}
else
{
$DB->delete_records('local_treestudyplan', ['id' => $this->id]);
return success::success();
}
}
public static function find_all($contextid=-1){
global $DB, $USER;
$list = [];
if($contextid <= 0){
$ids = $DB->get_fieldset_select(self::TABLE,"id","");
}
else{
if($contextid == 1){
$contextid = 1;
$where = "context_id <= :contextid OR context_id IS NULL";
} else {
$where = "context_id = :contextid";
}
$ids = $DB->get_fieldset_select(self::TABLE,"id",$where,["contextid" => $contextid]);
}
foreach($ids as $id)
{
$list[] = studyplan::findById($id);
}
return $list;
}
public static function find_by_shortname($shortname, $contextid = 0): array{
global $DB;
$list = [];
$where = "shortname = :shortname AND context_id = :contextid";
if($contextid == 0){
$where .= "OR context_id IS NULL";
}
$ids = $DB->get_fieldset_select(self::TABLE,"id",$where,["shortname"=>$shortname, "contextid" => $contextid]);
foreach($ids as $id)
{
$list[] = studyplan::findById($id);
}
return $list;
}
public static function find_for_user($userid)
{
global $DB;
$sql = "SELECT s.id FROM {local_treestudyplan} s
INNER JOIN {local_treestudyplan_cohort} j ON j.studyplan_id = s.id
INNER JOIN {cohort_members} cm ON j.cohort_id = cm.cohortid
WHERE cm.userid = :userid";
$cohort_plan_ids = $DB->get_fieldset_sql($sql, ['userid' => $userid]);
$sql = "SELECT s.id FROM {local_treestudyplan} s
INNER JOIN {local_treestudyplan_user} j ON j.studyplan_id = s.id
WHERE j.user_id = :userid";
$user_plan_ids = $DB->get_fieldset_sql($sql, ['userid' => $userid]);
$plans = [];
foreach($cohort_plan_ids as $id) {
$plans[$id] = self::findById($id);
}
foreach($user_plan_ids as $id) {
if(!array_key_exists($id,$plans)){
$plans[$id] = self::findById($id);
}
}
return $plans;
}
static public function exist_for_user($userid)
{
global $DB;
$count = 0;
$sql = "SELECT s.* FROM {local_treestudyplan} s
INNER JOIN {local_treestudyplan_cohort} j ON j.studyplan_id = s.id
INNER JOIN {cohort_members} cm ON j.cohort_id = cm.cohortid
WHERE cm.userid = :userid";
$count += $DB->count_records_sql($sql, ['userid' => $userid]);
$sql = "SELECT s.* FROM {local_treestudyplan} s
INNER JOIN {local_treestudyplan_user} j ON j.studyplan_id = s.id
WHERE j.user_id = :userid";
$count += $DB->count_records_sql($sql, ['userid' => $userid]);
return ($count > 0);
}
/**
* Retrieve the users linked to this studyplan.
* @return array of User objects
*/
public function find_linked_users(){
global $DB;
$users = [];
$uids = $this->find_linked_userids();
foreach($uids as $uid){
$users[] = $DB->get_record("user",["id"=>$uid]);
}
return $users;
}
/**
* Retrieve the user id's of the users linked to this studyplan.
* @return array of int (User Id)
*/
public function find_linked_userids(): array {
global $DB;
if($this->linked_userids === null){
$uids = [];
// First get directly linked userids
$sql = "SELECT j.user_id FROM {local_treestudyplan_user} j
WHERE j.studyplan_id = :planid";
$ulist = $DB->get_fieldset_sql($sql, ['planid' => $this->id]);
$uids = array_merge($uids,$ulist);
foreach($ulist as $uid){
$users[] = $DB->get_record("user",["id"=>$uid]);
}
// Next het users linked though cohort
$sql = "SELECT cm.userid FROM {local_treestudyplan_cohort} j
INNER JOIN {cohort_members} cm ON j.cohort_id = cm.cohortid
WHERE j.studyplan_id = :planid";
$ulist = $DB->get_fieldset_sql($sql, ['planid' => $this->id]);
$uids = array_merge($uids,$ulist);
$this->linked_userids = array_unique($uids);
}
return $this->linked_userids;
}
/** Check if this studyplan is linked to a particular user
* @param bool|stdClass $user The userid or user record of the user
*/
public function has_linked_user($user){
if(is_int($user)){
$userid = $user;
} else {
$userid = $user->id;
}
$uids = $this->find_linked_userids();
if(in_array($userid,$uids)){
return true;
} else {
return false;
}
}
public static function user_structure($value=VALUE_REQUIRED){
return new \external_single_structure([
"id" => new \external_value(PARAM_INT, 'id of studyplan'),
"name" => new \external_value(PARAM_TEXT, 'name of studyplan'),
"shortname"=> new \external_value(PARAM_TEXT, 'shortname of studyplan'),
"description"=> new \external_value(PARAM_TEXT, 'description of studyplan'),
"pages" => new \external_multiple_structure(studyplanpage::user_structure()),
"aggregation_info" => aggregator::basic_structure(),
],'Studyplan with user info',$value);
}
public function user_model($userid){
$model = [
'id' => $this->r->id,
'name' => $this->r->name,
'shortname' => $this->r->shortname,
'description' => $this->r->description,
'pages' => [],
'aggregation_info' => $this->aggregator->basic_model(),
];
foreach($this->pages() as $p)
{
$model['pages'][] = $p->user_model($userid);
}
return $model;
}
public static function duplicate_plan($plan_id,$name,$shortname)
{
$ori = self::findById($plan_id);
$new = $ori->duplicate($name,$shortname);
return $new->simple_model();
}
public function duplicate($name,$shortname)
{
// First duplicate the studyplan structure
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$newplan =studyplan::add([
'name' => $name,
'shortname' => $shortname,
'description' => $this->r->description,
]);
// next, copy the studylines
foreach($this->pages() as $p){
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$newchild = $p->duplicate($newplan);
}
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return $newplan;
}
public static function export_structure()
{
return new \external_single_structure([
"format" => new \external_value(PARAM_TEXT, 'format of studyplan export'),
"content"=> new \external_value(PARAM_TEXT, 'exported studyplan content'),
],'Exported studyplan');
}
public function export_plan()
{
$model = $this->export_model();
$json = json_encode([
"type"=>"studyplan",
"version"=>2.0,
"studyplan"=>$model
],\JSON_PRETTY_PRINT);
return [ "format" => "application/json", "content" => $json];
}
public function export_model()
{
$model = [
'name' => $this->r->name,
'shortname' => $this->r->shortname,
'description' => $this->r->description,
"aggregation" => $this->r->aggregation,
"aggregation_config" => json_decode($this->aggregator->config_string()),
'aggregation_info' => $this->aggregator->basic_model(),
'pages' => $this->export_pages_model(),
];
return $model;
}
public function export_pages_model()
{
$pages = [];
foreach($this->pages() as $p)
{
$pages[] = $p->export_model();
}
return $pages;
}
public static function import_studyplan($content,$format="application/json",$context_id=1)
{
if($format != "application/json") { return false;}
$content = json_decode($content,true);
if($content["type"] == "studyplan" && $content["version"] >= 2.0){
// Make sure the aggregation_config is re-encoded as json text
$content["studyplan"]["aggregation_config"] = json_encode($content["studyplan"]["aggregation_config"]);
// And make sure the context_id is set to the provided context for import
$content["studyplan"]["context_id"] = $context_id;
// Create a new plan, based on the given parameters - this is the import studyplan part
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$plan = self::add($content["studyplan"],true);
// Now import each page
return $plan->import_pages_model($content["studyplan"]["pages"]);
}
else {
error_log("Invalid format and type: {$content['type']} version {$content['version']}");
return false;
}
}
public function import_pages($content,$format="application/json")
{
if($format != "application/json") { return false;}
$content = json_decode($content,true);
if($content["version"] >= 2.0){
if($content["type"] == "studyplanpage"){
// import single page from a studyplanpage (wrapped in array of one page)
return $this->import_pages_model([$content["page"]]);
}
else if($content["type"] == "studyplan"){
// Import all pages from the studyplan
return $this->import_pages_model($content["studyplan"]["pages"]);
}
}
else {
return false;
}
}
protected function import_pages_model($model)
{
$this->pages(); // make sure the page cache is initialized, since we will be adding to it.
foreach($model as $p){
$p["studyplan_id"] = $this->id();
$page = studyplanpage::add($p);
$this->page_cache[] = $page;
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$page->import_periods_model($p["perioddesc"]);
$page->import_studylines_model($p["studylines"]);
}
return true;
}
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/**
* Mark the studyplan as changed regarding courses and associated cohorts
*/
public function mark_csync_changed(){
global $DB;
$DB->update_record(self::TABLE, ['id' => $this->id,"csync_flag" => 1]);
$this->r->csync_flag = 1; //manually set it in the cache, if something unexpected happened, an exception has already been thrown anyway
}
/**
* Clear the csync mark
*/
public function clear_csync_changed(){
global $DB;
$DB->update_record(self::TABLE, ['id' => $this->id,"csync_flag" => 0]);
$this->r->csync_flag = 0; //manually set it in the cache, if something unexpected happened, an exception has already been thrown anyway
}
public function has_csync_changed(){
return ($this->r->csync_flag > 0)?true:false;
}
/**
* See if the specified course id is linked in this studyplan
*/
public function course_linked($courseid){
global $DB;
$sql = "SELECT COUNT(i.id)
FROM {local_treestudyplan}
INNER JOIN {local_treestudyplan_line} l ON p.id = l.studyplan_id
INNER JOIN {local_treestudyplan_item} i ON l.id = i.line_id
WHERE p.id = :planid
AND i.course_id = :courseid";
$count = $DB->get_field_sql($sql,["courseid" => $courseid, "planid" => $this->id]);
return ($count > 0)?true:false;
}
/**
* List the course id is linked in this studyplan
* Used for cohort enrolment cascading
*/
public function get_linked_course_ids(){
global $DB;
$sql = "SELECT i.course_id
FROM {local_treestudyplan} p
INNER JOIN {local_treestudyplan_page} pg ON p.id = pg.studyplan_id
INNER JOIN {local_treestudyplan_line} l ON pg.id = l.page_id
INNER JOIN {local_treestudyplan_item} i ON l.id = i.line_id
WHERE p.id = :studyplan_id AND i.type = :itemtype";
$fields = $DB->get_fieldset_sql($sql,["studyplan_id" => $this->id,"itemtype" => studyitem::COURSE]);
return $fields;
}
/**
* List the cohort id's associated with this studyplan
*/
public function get_linked_cohort_ids(){
global $CFG, $DB;
$sql = "SELECT DISTINCT j.cohort_id FROM {local_treestudyplan_cohort} j
WHERE j.studyplan_id = :studyplan_id";
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$fields = $DB->get_fieldset_sql($sql, ['studyplan_id' => $this->id]);
return $fields;
}
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/**
* List the user id's explicitly associated with this studyplan
*/
public function get_linked_user_ids(){
global $CFG, $DB;
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$sql = "SELECT DISTINCT j.user_id FROM {local_treestudyplan_user} j
WHERE j.studyplan_id = :studyplan_id";
$fields = $DB->get_fieldset_sql($sql, ['studyplan_id' => $this->id]);
return $fields;
}
/**
* See if the specified course id is linked in this studyplan
*/
public function badge_linked($badgeid){
global $DB;
$sql = "SELECT COUNT(i.id)
FROM {local_treestudyplan}
INNER JOIN {local_treestudyplan_line} l ON p.id = l.studyplan_id
INNER JOIN {local_treestudyplan_item} i ON l.id = i.line_id
WHERE p.id = :planid
AND i.badge_id = :badgeid";
$count = $DB->get_field_sql($sql,["badgeid" => $badgeid, "planid" => $this->id]);
return ($count > 0)?true:false;
}
}