moodle_local_treestudyplan/classes/studyline.php

835 lines
28 KiB
PHP

<?php
// This file is part of the Studyplan plugin for Moodle
//
// 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 <https://www.gnu.org/licenses/>.
/**
* Model class for study lines
* @package local_treestudyplan
* @copyright 2023 P.M. Kuipers
* @license https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace local_treestudyplan;
defined('MOODLE_INTERNAL') || die();
require_once($CFG->libdir.'/externallib.php');
/**
* Model class for study lines
*/
class studyline {
/**
* Studyline is not enrollable
* @var int
*/
public const ENROLLABLE_NONE = 0;
/**
* Studyline can be enrolled into by the student
* @var int
*/
public const ENROLLABLE_SELF = 1;
/**
* Studyline can be enrolled into by specific role(s)
* @var int
*/
public const ENROLLABLE_ROLE = 2;
/**
* Studyline can be enrolled by user and/or role
* @var int
*/
public const ENROLLABLE_SELF_ROLE = 3;
/**
* Handle for course slots in the period for webservice export
* @var string
*/
public const SLOTSET_COURSES = 'courses';
/**
* Handle for filter slots around the periods for webservice export
* @var string
*/
public const SLOTSET_FILTER = 'filters';
/**
* List of item types allowed in the course slot
* @var array
*/
public const COURSE_TYPES = [
studyitem::COURSE,
];
/**
* List of item types allowed in the filter slot
* @var array
*/
public const FILTER_TYPES = [
studyitem::JUNCTION,
studyitem::BADGE,
studyitem::FINISH,
studyitem::START,
];
/**
* List of item types allowed in the first filter slot
* @var array
*/
public const FILTER0_TYPES = [
studyitem::START,
];
/** @var string */
public const TABLE = "local_treestudyplan_line";
/**
* Cache retrieved studylines for optimization
* @var array
*/
private static $cache = [];
/**
* Holds database record
* @var stdClass
*/
private $r;
/** @var int */
private $id;
/** @var studyplanpage */
private $page;
/** @var studyplan*/
private $studyplan;
/**
* Return the context the studyplan is associated to
*/
public function context(): \context {
return $this->studyplan->context();
}
/**
* Return the studyplan for this line
*/
public function studyplan() : studyplan {
return $this->studyplan;
}
/**
* Return the studyplan page for this line
*/
public function page() : studyplanpage {
return $this->page;
}
/**
* Find record in database and return management object
* @param int $id Id of database record
*/
public static function find_by_id($id): self {
if (!array_key_exists($id, self::$cache)) {
self::$cache[$id] = new self($id);
}
return self::$cache[$id];
}
/**
* Construct new instance from DB record
* @param int $id Id of database record
*/
private function __construct($id) {
global $DB;
$this->id = $id;
$this->r = $DB->get_record(self::TABLE, ['id' => $id]);
$this->page = studyplanpage::find_by_id($this->r->page_id);
$this->studyplan = $this->page->studyplan();
}
/**
* Return database identifier
*/
public function id() : int {
return $this->id;
}
/**
* Return full name
*/
public function name() : string {
return $this->r->name;
}
/**
* Return short name
*/
public function shortname() : string {
return $this->r->shortname;
}
/**
* Whether this line is enrollable by the student
*/
public function self_enrollable() : bool {
return ($this->r->enrollable == self::ENROLLABLE_SELF || $this->r->enrollable == self::ENROLLABLE_SELF_ROLE);
}
/**
* Whether this line is enrollable by a role
*/
public function role_enrollable() : bool {
return ($this->r->enrollable == self::ENROLLABLE_ROLE || $this->r->enrollable == self::ENROLLABLE_SELF_ROLE);
}
/**
* Whether the current user can enrol a specific user in this line
* @param int|null $user ID or user object for user or null
*/
public function can_enrol($userid=null) : bool {
global $USER;
$plan = $this->studyplan();
if (!empty($userid)){
if ( $plan->has_linked_user(intval($userid))) {
if ( $this->self_enrollable() && $userid == $USER->id ) {
return true;
}
if ( $this->role_enrollable()) {
$context = $plan->context();
foreach ( $this->enrol_roleids() as $rid) {
if (\user_has_role_assignment($USER->id,$rid,$context->id)){
return true;
}
}
}
}
} else {
if ( $this->role_enrollable()) {
$context = $plan->context();
foreach ( $this->enrol_roleids() as $rid) {
if (\user_has_role_assignment($USER->id,$rid,$context->id)){
return true;
}
}
}
}
return false;
}
/**
* Whether this line is enrollable at all
*/
public function enrollable() : bool {
return $this->r->enrollable != self::ENROLLABLE_NONE;
}
/**
* List the available roles that can enrol the student
*/
public function enrol_roles() : array {
global $DB;
$list = [];
$roles = explode(",",$this->r->enrolrole);
foreach($roles as $r) {
$roleid = intval($r);
if ($roleid > 0) {
try {
$role = $DB->get_record('role',["id" => $roleid],"*", MUST_EXIST);
$list[] = $role;
} catch(\Exception $x) {}
}
}
return $list;
}
/**
* List the available roles that can enrol the student
*/
public function enrol_roleids() : array {
global $DB;
$list = [];
$roles = explode(",",$this->r->enrolrole);
foreach($roles as $r) {
$roleid = intval($r);
if ($roleid > 0) {
$list[] = $roleid;
}
}
return $list;
}
/**
* List the available roles that can enrol the student in a proper model
*/
public function enrol_roles_model() : array {
$list = [];
foreach($this->enrol_roles as $role) {
$name = role_get_name($role,$this->context()); // Get localized role name.
$list[] = [
"id" => $role->id,
"name" => $name,
];
}
return $list;
}
/**
* Webservice structure for editor info
* @param int $value Webservice requirement constant
*/
public static function editor_structure($value = VALUE_REQUIRED) : \external_description {
return new \external_single_structure([
"id" => new \external_value(PARAM_INT, 'id of studyline'),
"name" => new \external_value(PARAM_TEXT, 'shortname of studyline'),
"shortname" => new \external_value(PARAM_TEXT, 'idnumber of studyline'),
"color" => new \external_value(PARAM_TEXT, 'description of studyline'),
"sequence" => new \external_value(PARAM_INT, 'order of studyline'),
"enrol" => self::enrol_info_structure(),
"slots" => new \external_multiple_structure(
new \external_single_structure([
self::SLOTSET_COURSES => new \external_multiple_structure(
studyitem::editor_structure(), 'competency items', VALUE_OPTIONAL),
self::SLOTSET_FILTER => new \external_multiple_structure(
studyitem::editor_structure(), 'filter items'),
])
)
],"Study line editor structure",$value);
}
/**
* Webservice structure for enrolment info
* @param int $value Webservice requirement constant
*/
public static function enrol_info_structure($value = VALUE_REQUIRED) {
return new \external_single_structure([
"enrollable" => new \external_value(PARAM_INT, 'enrol mode (raw)'),
"enrolroles" => new \external_multiple_structure(new \external_value(PARAM_INT, 'id of role')),
"allowedroles" => new \external_multiple_structure(new \external_single_structure([
"id" => new \external_value(PARAM_INT, 'id of role'),
"name" => new \external_value(PARAM_TEXT, 'name of role'),
])),
"can_enrol" => new \external_value(PARAM_BOOL, 'enrollable by current user',VALUE_OPTIONAL),
"enrolled" => new \external_value(PARAM_BOOL, 'student is enrolled',VALUE_OPTIONAL),
"enrolled_time" => new \external_value(PARAM_INT, 'moment of enrollment',VALUE_OPTIONAL),
"enrolled_by" => new \external_value(PARAM_TEXT, 'Name of enrolling user',VALUE_OPTIONAL),
],"Enrollment info",$value);
}
/**
* Webservice structure for simple info
* @param int $value Webservice requirement constant
*/
public static function simple_structure($value = VALUE_REQUIRED) : \external_description {
return new \external_single_structure([
"id" => new \external_value(PARAM_INT, 'id of studyline'),
"name" => new \external_value(PARAM_TEXT, 'shortname of studyline'),
"shortname" => new \external_value(PARAM_TEXT, 'idnumber of studyline'),
"color" => new \external_value(PARAM_TEXT, 'description of studyline'),
"sequence" => new \external_value(PARAM_INT, 'order of studyline'),
"enrol" => self::enrol_info_structure(),
],"Study line simple structure",$value);
}
/**
* Webservice model for simple info
* @return array Webservice data model
*/
public function simple_model() : array {
return [
'id' => $this->r->id,
'name' => $this->r->name,
'shortname' => $this->r->shortname,
'color' => $this->r->color,
'sequence' => $this->r->sequence,
'enrol' => $this->enrol_info_model(),
];
}
/**
* Webservice model for editor info
* @return array Webservice data model
*/
public function editor_model() : array {
return $this->generate_model("editor");
}
/**
* Create a model for the given type of operation
* @param string $mode One of [ 'editor', 'export']
*/
protected function generate_model($mode) : array {
// Mode parameter is used to geep this function for both editor model and export model.
// (Export model results in fewer parameters on children, but is otherwise basically the same as this function).
global $DB;
$model = [
'id' => $this->r->id,
'name' => $this->r->name,
'shortname' => $this->r->shortname,
'color' => $this->r->color,
'sequence' => $this->r->sequence,
'enrol' => $this->enrol_info_model(),
'slots' => [],
];
if ($mode == "export") {
// Id and sequence are not used in export model.
unset($model["id"]);
unset($model["sequence"]);
}
// Get the number of slots.
// As a safety data integrity measure, if there are any items in a higher slot than currently allowed, .
// Make sure there are enought slots to account for them.
// Alternatively, we could ensure that on reduction of slots, the items that no longer have a slot will be removed.
$maxslot = $DB->get_field_select(studyitem::TABLE, "MAX(slot)", "line_id = :lineid", ['lineid' => $this->id]);
$numslots = max($this->page->periods(), $maxslot + 1);
// Create the required amount of slots.
for ($i = 0; $i < $numslots + 1; $i++) {
if ($mode == "export") {
// Export mode does not separate between filter or competency type, since that is determined automatically.
$slots = [];
} else {
if ($i > 0) {
$slots = [self::SLOTSET_COURSES => [], self::SLOTSET_FILTER => []];
} else {
$slots = [self::SLOTSET_FILTER => []];
}
}
$model['slots'][$i] = $slots;
}
$children = studyitem::find_studyline_children($this);
foreach ($children as $c) {
if ($mode == "export") {
$model['slots'][$c->slot()][] = $c->export_model();
} else {
$slotset = null;
if ($c->slot() > 0) {
if (in_array($c->type(), self::COURSE_TYPES)) {
$slotset = self::SLOTSET_COURSES;
} else if (in_array($c->type(), self::FILTER_TYPES)) {
$slotset = self::SLOTSET_FILTER;
}
} else if (in_array($c->type(), self::FILTER0_TYPES)) {
$slotset = self::SLOTSET_FILTER;
}
if (isset($slotset)) {
$model['slots'][$c->slot()][$slotset][] = $c->editor_model();
}
}
}
return $model;
}
/**
* Add a new study line
* @param array $fields Properties for study line ['page_id', 'name', 'shortname', 'color']
*/
public static function add($fields) : self {
global $DB;
if (!isset($fields['page_id'])) {
throw new \InvalidArgumentException("parameter 'page_id' missing");
}
$pageid = $fields['page_id'];
$sqmax = $DB->get_field_select(self::TABLE, "MAX(sequence)", "page_id = :page_id", ['page_id' => $pageid]);
$addable = ['page_id', 'name', 'shortname', 'color','enrollable','enrolrole'];
$info = ['sequence' => $sqmax + 1];
foreach ($addable as $f) {
if (array_key_exists($f, $fields)) {
$info[$f] = $fields[$f];
}
}
$id = $DB->insert_record(self::TABLE, $info);
return self::find_by_id($id);
}
/**
* Edit study line properties
* @param array $fields Changed roperties for study line ['name', 'shortname', 'color']
*/
public function edit($fields) : self {
global $DB;
$editable = ['name', 'shortname', 'color','enrollable','enrolrole'];
$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);
return $this;
}
/**
* Delete studyline
* @param bool $force Force deletion even if study line contains items
*/
public function delete($force = false) : success {
global $DB;
if ($force) {
$children = studyitem::find_studyline_children($this);
foreach ($children as $c) {
$c->delete($force);
}
}
// Check if this item has study items in it.
if ($DB->count_records(studyitem::TABLE, ['line_id' => $this->id]) > 0) {
return success::fail('cannot delete studyline with items');
} else {
$DB->delete_records(self::TABLE, ['id' => $this->id]);
return success::success();
}
}
/**
* Reorder study lines
* @param int[] $resequence New order of study lines by id
*/
public static function reorder($resequence) : success {
global $DB;
foreach ($resequence as $sq) {
$DB->update_record(self::TABLE, [
'id' => $sq['id'],
'sequence' => $sq['sequence'],
]);
}
return success::success();
}
/**
* Find all studylines associated with a studyplan page
* @param studyplanpage $page The studyplanpage to search for
* @return studyline[]
*/
public static function find_page_children(studyplanpage $page) : array {
global $DB;
$list = [];
$ids = $DB->get_fieldset_select(self::TABLE, "id", "page_id = :page_id ORDER BY sequence",
['page_id' => $page->id()]);
foreach ($ids as $id) {
$list[] = self::find_by_id($id);
}
return $list;
}
/**
* Webservice structure for userinfo
* @param int $value Webservice requirement constant
*/
public static function user_structure($value = VALUE_REQUIRED) : \external_description {
return new \external_single_structure([
"id" => new \external_value(PARAM_INT, 'id of studyline'),
"name" => new \external_value(PARAM_TEXT, 'shortname of studyline'),
"shortname" => new \external_value(PARAM_TEXT, 'idnumber of studyline'),
"color" => new \external_value(PARAM_TEXT, 'description of studyline'),
"sequence" => new \external_value(PARAM_INT, 'order of studyline'),
"enrol" => self::enrol_info_structure(),
"slots" => new \external_multiple_structure(
new \external_single_structure([
self::SLOTSET_COURSES => new \external_multiple_structure(
studyitem::user_structure(), 'competency items', VALUE_OPTIONAL),
self::SLOTSET_FILTER => new \external_multiple_structure(
studyitem::user_structure(), 'filter items'),
])
)
], 'Studyline with user info', $value);
}
/**
* Webservice model for user enrolment info
* @param int $userid ID of user to check specific info for
* @return array Webservice data model
*/
public function enrol_info_model($userid=null) {
global $DB,$USER;
$model = [
'enrolroles' => $this->enrol_roleids(),
'allowedroles' => $this->enrol_roles_model(),
'enrollable' => $this->r->enrollable,
];
if (!empty($userid)) {
$r = $DB->get_record('local_treestudyplan_lineuser',[
'line_id' => $this->id(),
'user_id' => $userid,
]);
if (empty($r)) {
$enrolled = false;
$enrolled_time = 0;
$enrolled_by = "";
} else {
$enrolled = boolval($r->enrolled);
$enrolled_time = $r->timeenrolled;
$by = $DB->get_record('user',["id" => $r->enrolledby]);
if (empty($by)) {
$enrolled_by = \get_string("unknownuser","core");
} else {
$enrolled_by = "{$by->firstname} {$by->lastname}";
}
}
$usermodel = [
'can_enrol' => $this->can_enrol($userid),
"enrolled" => $enrolled,
"enrolled_time" => $enrolled_time,
"enrolled_by" => $enrolled_by,
];
$model = array_merge($model,$usermodel);
} else {
$model["can_enrol"] = $this->can_enrol();
}
return $model;
}
/**
* Check if student is enrolled in the line.
* @param int $userid ID of user to check specific info for
* @return array Webservice data model
*/
public function isenrolled($userid) {
global $DB;
if ($this->r->enrollable == self::ENROLLABLE_NONE) {
return true; // If student cannot enrol, the student always is enrolled
} else {
$r = $DB->get_record('local_treestudyplan_lineuser',[
'line_id' => $this->id(),
'user_id' => $userid,
]);
if (empty($r)) {
return false;
} else {
return boolval($r->enrolled);
}
}
}
/**
* Enrol student from this line (if line enrollable)
* NOTE: This function does not check if the current user should be allowed to do this,
* the checks need to be done in the calling webservice / function
* @param int $userid of user to enrol
*/
public function enrol($userid) {
global $DB,$USER;
if ($this->r->enrollable > self::ENROLLABLE_NONE) {
$r = $DB->get_record("local_treestudyplan_lineuser",
["line_id" => $this->id(),
"user_id" => $userid]);
if ($r) {
// Registration already exists, check if enrol is false and update accordingly.
if (! boolval($r->enrolled)) {
$r->enrolled = 1;
$r->timeenrolled = time();
$r->enrolledby = $USER->id;
$DB->update_record("local_treestudyplan_lineuser",$r);
}
// Otherwise, ignore the request.
} else {
// Insert new record.
$r = new \stdClass;
$r->enrolled = 1;
$r->line_id = $this->id();
$r->user_id = $userid;
$r->timeenrolled = time();
$r->enrolledby = $USER->id;
$DB->insert_record("local_treestudyplan_lineuser",$r);
}
}
}
/**
* Unenrol student from this line (if line enrollable)
* NOTE: This function does not check if the current user should be allowed to do this,
* the checks need to be done in the calling webservice / function
* @param int $userid of user to unenrol
*/
public function unenrol($userid) {
global $DB,$USER;
if ($this->r->enrollable > self::ENROLLABLE_NONE) {
// Check if an enrollment line exist.
$r = $DB->get_record("local_treestudyplan_lineuser",
["line_id" => $this->id(),
"user_id" => $userid]);
if ($r) {
// Registration already exists, check if enrolled is true and update accordingly.
if (boolval($r->enrolled)) {
$r->enrolled = 0;
$r->timeenrolled = time(); // Regi
$r->enrolledby = $USER->id;
$DB->update_record("local_treestudyplan_lineuser",$r);
}
// Otherwise, ignore the request.
}
// Otherwise, no action is needed.
}
}
/**
* Webservice model for user info
* @param int $userid ID of user to check specific info for
* @return array Webservice data model
*/
public function user_model($userid) {
global $DB;
$model = [
'id' => $this->r->id,
'name' => $this->r->name,
'shortname' => $this->r->shortname,
'color' => $this->r->color,
'sequence' => $this->r->sequence,
'enrol' => $this->enrol_info_model($userid),
'slots' => [],
];
// Get the number of slots.
// As a safety data integrity measure, if there are any items in a higher slot than currently allowed, .
// Make sure there are enought slots to account for them.
// Alternatively, we could ensure that on reduction of slots, the items that no longer have a slot will be removed.
$maxslot = $DB->get_field_select(studyitem::TABLE, "MAX(slot)", "line_id = :lineid", ['lineid' => $this->id]);
$numslots = max($this->page->periods(), $maxslot + 1);
// Create the required amount of slots.
for ($i = 0; $i < $numslots + 1; $i++) {
if ($i > 0) {
$slots = [self::SLOTSET_COURSES => [], self::SLOTSET_FILTER => []];
} else {
$slots = [self::SLOTSET_FILTER => []];
}
$model['slots'][$i] = $slots;
}
$children = studyitem::find_studyline_children($this);
foreach ($children as $c) {
if ($c->valid()) {
$slotset = null;
if ($c->slot() > 0) {
if (in_array($c->type(), self::COURSE_TYPES)) {
$slotset = self::SLOTSET_COURSES;
} else if (in_array($c->type(), self::FILTER_TYPES)) {
$slotset = self::SLOTSET_FILTER;
}
} else if (in_array($c->type(), self::FILTER0_TYPES)) {
$slotset = self::SLOTSET_FILTER;
}
if (isset($slotset)) {
$model['slots'][$c->slot()][$slotset][] = $c->user_model($userid);
}
}
}
return $model;
}
/**
* Duplicate this studyplan page
* @param studyplan $newstudyplan Studyplan to copy the line into
* @param array $translation Mapping array of old item ids to new item ids for connection matching
*/
public function duplicate($newstudyplan, &$translation) : self {
global $DB;
// Clone the database fields.
$fields = clone $this->r;
// Set new studyplan id.
unset($fields->id);
$fields->studyplan_id = $newstudyplan->id();
// Create new record with the new data.
$id = $DB->insert_record(self::TABLE, (array)$fields);
$new = self::find_by_id($id);
// Next copy all the study items for this studyline.
// And record the original and copy id's in the $translation array.
// So the calling function can connect the new studyitems as required.
$children = studyitem::find_studyline_children($this);
$translation = [];
foreach ($children as $c) {
$newchild = $c->duplicate($new);
$translation[$c->id()] = $newchild->id();
}
return $new;
}
/**
* Export essential information for export
* @return array information model
*/
public function export_model() {
return $this->generate_model("export");
}
/**
* Import study items into line from decoded array model
* @param array $model Decoded array
* @param array $itemtranslation Link to array to map old item ids to new item ids for connection matching
* @param array $connections Link to array of connections between item
* @return null
*/
public function import_studyitems(array $model, array &$itemtranslation, array &$connections) {
global $DB;
foreach ($model as $slot => $slotmodel) {
$courselayer = 0;
$filterlayer = 0;
foreach ($slotmodel as $itemmodel) {
if ($itemmodel["type"] == "course") {
$itemmodel["layer"] = $courselayer;
$courselayer++;
} else {
$itemmodel["layer"] = $filterlayer;
$filterlayer++;
}
$itemmodel["slot"] = $slot;
$itemmodel["line_id"] = $this->id();
$item = studyitem::import_item($itemmodel);
if (!empty($item)) {
$itemtranslation[$itemmodel["id"]] = $item->id();
if (count($itemmodel["connections"]) > 0) {
if (! isset($connections[$item->id()]) || ! is_array($connections[$item->id()])) {
$connections[$item->id()] = [];
}
foreach ($itemmodel["connections"] as $toid) {
$connections[$item->id()][] = $toid;
}
}
}
}
}
}
}