moodle_local_treestudyplan/classes/studyplan.php

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<?php
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// 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/>.
/**
*
* @package local_treestudyplan
* @copyright 2023 P.M. Kuipers
* @license https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace local_treestudyplan;
require_once($CFG->libdir.'/externallib.php');
class studyplan {
const TABLE = "local_treestudyplan";
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private static $STUDYPLANCACHE = [];
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private $r; // Holds database record.
private $id;
private $aggregator;
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private $context = null; // Hold context object once retrieved.
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private $linkeduserids = null; // Cache lookup of linked users (saves queries).
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private $pagecache = null;
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public function aggregator() {
return $this->aggregator;
}
// Cache constructors to avoid multiple creation events in one session.
public static function findById($id): self {
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if (!array_key_exists($id, self::$STUDYPLANCACHE)) {
self::$STUDYPLANCACHE[$id] = new self($id);
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}
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return self::$STUDYPLANCACHE[$id];
}
private function __construct($id) {
global $DB;
$this->id = $id;
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$this->r = $DB->get_record(self::TABLE, ['id' => $id]);
$this->aggregator = aggregator::createOrDefault($this->r->aggregation, $this->r->aggregation_config);
}
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public function id() {
return $this->id;
}
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public function shortname() {
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return $this->r->shortname;
}
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public function name() {
return $this->r->name;
}
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public function pages() {
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// Cached version of find_studyplan_children.
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// (may be premature optimization, since .
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// Find_studyplan_children also does some caching).
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if (empty($this->page_cache)) {
$this->page_cache = studyplanpage::find_studyplan_children($this);
}
return $this->page_cache;
}
/**
* Return the context this studyplan is associated to
*/
public function context(): \context{
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if (!isset($this->context)) {
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try {
$this->context = contextinfo::by_id($this->r->context_id)->context;
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} catch (\dml_missing_record_exception $x) {
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// Just throw it up again. catch is included here to make sure we know it throws this exception.
throw new \InvalidArgumentException(
"Context {$this->r->context_id} not available");
}
}
return $this->context;
}
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public static function simple_structure($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'),
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"shortname" => new \external_value(PARAM_TEXT, 'shortname of studyplan'),
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"idnumber" => new \external_value(PARAM_TEXT, 'idnumber of curriculum'),
"context_id" => new \external_value(PARAM_INT, 'context_id of studyplan'),
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"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(),
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"pages" => new \external_multiple_structure(studyplanpage::simple_structure(), 'pages'),
], 'Basic studyplan info', $value);
}
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public function simple_model() {
$pages = [];
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foreach ($this->pages() as $p) {
$pages[] = $p->simple_model();
}
return [
'id' => $this->r->id,
'name' => $this->r->name,
'shortname' => $this->r->shortname,
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'idnumber' => $this->r->idnumber,
'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' => $pages,
];
}
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public static function editor_structure($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'),
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"shortname" => new \external_value(PARAM_TEXT, 'shortname of studyplan'),
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"idnumber" => new \external_value(PARAM_TEXT, 'idnumber of curriculum'),
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"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'),
])),
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], "Scale forcing on stuff", VALUE_OPTIONAL),
], "Advanced features available", VALUE_OPTIONAL),
], 'Studyplan full structure', $value);
}
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public function editor_model() {
global $DB;
$model = [
'id' => $this->r->id,
'name' => $this->r->name,
'shortname' => $this->r->shortname,
'idnumber' => $this->r->idnumber,
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'description' => $this->r->description,
'context_id' => $this->context()->id,
"aggregation" => $this->r->aggregation,
"aggregation_config" => $this->aggregator->config_string(),
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'aggregation_info' => $this->aggregator->basic_model(),
'pages' => [],
];
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foreach ($this->pages() as $p) {
$model['pages'][] = $p->editor_model();
}
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if (has_capability('local/treestudyplan:forcescales', \context_system::instance())) {
if (!array_key_exists('advanced', $model)) {
// Create advanced node if it does not exist.
$model['advanced'] = [];
}
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// Get a list of available scales.
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$scales = array_map( function($scale) {
return [ "id" => $scale->id, "name" => $scale->name, ];
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}, \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', 'idnumber', 'context_id', 'aggregation', 'aggregation_config'];
$info = ['enddate' => null ];
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foreach ($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($id); // Make sure the new studyplan is immediately cached.
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// Start temporary skräpp code.
// Add a single page and copy the names.This keeps the data sane until the upgrade to .
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// Real page management is done.
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// On import, adding an empty page messes things up for now, so we have an option to skip this....
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// TODO: Remove this when proper page management is implemented.
if (!$bare) {
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$pageaddable = ['name', 'shortname', 'description', 'periods', 'startdate', 'enddate'];
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$pageinfo = ['studyplan_id' => $id];
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foreach ($pageaddable as $f) {
if (array_key_exists($f, $fields)) {
if ($f == "name") {
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$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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}
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// End temporary skräpp code.
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return $plan;
}
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public function edit($fields) {
global $DB;
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$editable = ['name', 'shortname', 'description', 'idnumber', 'context_id', '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);
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//reload record after edit.
$this->r = $DB->get_record(self::TABLE, ['id' => $this->id], "*", MUST_EXIST);
//reload the context...
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$this->context = null;
$this->context();
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// Reload aggregator.
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$this->aggregator = aggregator::createOrDefault($this->r->aggregation, $this->r->aggregation_config);
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// Start temporary skräpp code.
// TODO: Until proper page editing is implemented, copy data from studyplan to it's first page.
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// This keeps the data sane until the upgrade is done.
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if (count($this->pages()) == 1) {
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// Update the info to the page as well.
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$page = $this->pages()[0];
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$pageeditable = ['name', 'shortname', 'description', 'periods', 'startdate', 'enddate'];
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$pageinfo = [];
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foreach ($pageeditable as $f) {
if (array_key_exists($f, $fields)) {
if ($f == "name") {
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$pageinfo["fullname"] = $fields[$f];
}else {
$pageinfo[$f] = $fields[$f];
}
}
}
$page->edit($pageinfo);
}
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// End temporary skräpp code.
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return $this;
}
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public function delete($force=false) {
global $DB;
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if ($force) {
$children = studyplanpage::find_studyplan_children($this);
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foreach ($children as $c) {
$c->delete($force);
}
}
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if ($DB->count_records('local_treestudyplan_page', ['studyplan_id' => $this->id]) > 0) {
return success::fail('cannot delete studyplan that still has pages');
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} else {
$DB->delete_records('local_treestudyplan', ['id' => $this->id]);
return success::success();
}
}
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public static function find_all($contextid=-1) {
global $DB, $USER;
$list = [];
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if ($contextid <= 0) {
$ids = $DB->get_fieldset_select(self::TABLE, "id", "");
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} else {
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if ($contextid == 1) {
$contextid = 1;
$where = "context_id <= :contextid OR context_id IS NULL";
} else {
$where = "context_id = :contextid";
}
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$ids = $DB->get_fieldset_select(self::TABLE, "id", $where, ["contextid" => $contextid]);
}
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foreach ($ids as $id) {
$list[] = studyplan::findById($id);
}
return $list;
}
public static function find_by_shortname($shortname, $contextid = 0): array{
global $DB;
$list = [];
$where = "shortname = :shortname AND context_id = :contextid";
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if ($contextid == 0) {
$where .= "OR context_id IS NULL";
}
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$ids = $DB->get_fieldset_select(self::TABLE, "id", $where, ["shortname" => $shortname, "contextid" => $contextid]);
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foreach ($ids as $id) {
$list[] = studyplan::findById($id);
}
return $list;
}
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public static function find_for_user($userid) {
global $DB;
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$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";
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$cohortplan_ids = $DB->get_fieldset_sql($sql, ['userid' => $userid]);
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$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";
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$userplan_ids = $DB->get_fieldset_sql($sql, ['userid' => $userid]);
$plans = [];
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foreach ($cohortplan_ids as $id) {
$plans[$id] = self::findById($id);
}
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foreach ($userplan_ids as $id) {
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if (!array_key_exists($id, $plans)) {
$plans[$id] = self::findById($id);
}
}
return $plans;
}
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static public function exist_for_user($userid) {
global $DB;
$count = 0;
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$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' => $userid]);
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$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);
}
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/**
* Retrieve the users linked to this studyplan.
* @return array of User objects
*/
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public function find_linked_users() {
global $DB;
$users = [];
$uids = $this->find_linked_userids();
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foreach ($uids as $uid) {
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$users[] = $DB->get_record("user", ["id" => $uid]);
}
return $users;
}
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/**
* 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 $DB;
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if ($this->linked_userids === null) {
$uids = [];
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// 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' => $this->id]);
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$uids = array_merge($uids, $ulist);
foreach ($ulist as $uid) {
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$users[] = $DB->get_record("user", ["id" => $uid]);
}
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// 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' => $this->id]);
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$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
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* @param bool|stdClass $user The userid or user record of the user
*/
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public function has_linked_user($user) {
if (is_int($user)) {
$userid = $user;
} else {
$userid = $user->id;
}
$uids = $this->find_linked_userids();
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if (in_array($userid, $uids)) {
return true;
} else {
return false;
}
}
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public static function user_structure($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'),
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"shortname" => new \external_value(PARAM_TEXT, 'shortname of studyplan'),
"description" => new \external_value(PARAM_TEXT, 'description of studyplan'),
"idnumber" => new \external_value(PARAM_TEXT, 'idnumber of curriculum'),
"pages" => new \external_multiple_structure(studyplanpage::user_structure()),
"aggregation_info" => aggregator::basic_structure(),
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], 'Studyplan with user info', $value);
}
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public function user_model($userid) {
$model = [
'id' => $this->r->id,
'name' => $this->r->name,
'shortname' => $this->r->shortname,
'description' => $this->r->description,
'idnumber' => $this->r->idnumber,
'pages' => [],
'aggregation_info' => $this->aggregator->basic_model(),
];
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foreach ($this->pages() as $p) {
$model['pages'][] = $p->user_model($userid);
}
return $model;
}
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public static function duplicate_plan($planid, $name, $shortname) {
$ori = self::findById($planid);
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$new = $ori->duplicate($name, $shortname);
return $new->simple_model();
}
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public function duplicate($name, $shortname) {
// First duplicate the studyplan structure.
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$newplan =studyplan::add([
'name' => $name,
'shortname' => $shortname,
'description' => $this->r->description,
]);
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// Next, copy the studylines.
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foreach ($this->pages() as $p) {
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$newchild = $p->duplicate($newplan);
}
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return $newplan;
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}
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public static function export_structure() {
return new \external_single_structure([
"format" => new \external_value(PARAM_TEXT, 'format of studyplan export'),
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"content" => new \external_value(PARAM_TEXT, 'exported studyplan content'),
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], 'Exported studyplan');
}
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public function export_plan() {
$model = $this->export_model();
$json = json_encode([
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"type" => "studyplan",
"version" => 2.0,
"studyplan" => $model
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], \JSON_PRETTY_PRINT);
return [ "format" => "application/json", "content" => $json];
}
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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;
}
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public function export_pages_model() {
$pages = [];
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foreach ($this->pages() as $p) {
$pages[] = $p->export_model();
}
return $pages;
}
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public static function import_studyplan($content, $format="application/json", $contextid=1) {
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if ($format != "application/json") {
return false;
}
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$content = json_decode($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"]);
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// And make sure the context_id is set to the provided context for import.
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$content["studyplan"]["context_id"] = $contextid;
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// Create a new plan, based on the given parameters - this is the import studyplan part.
$plan = self::add($content["studyplan"], true);
// Now import each page.
return $plan->import_pages_model($content["studyplan"]["pages"]);
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} else {
error_log("Invalid format and type: {$content['type']} version {$content['version']}");
return false;
}
}
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public function import_pages($content, $format="application/json") {
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if ($format != "application/json") {
return false;
}
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$content = json_decode($content, true);
if ($content["version"] >= 2.0) {
if ($content["type"] == "studyplanpage") {
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// Import single page from a studyplanpage (wrapped in array of one page).
return $this->import_pages_model([$content["page"]]);
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} else if ($content["type"] == "studyplan") {
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// Import all pages from the studyplan.
return $this->import_pages_model($content["studyplan"]["pages"]);
}
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} else {
return false;
}
}
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protected function import_pages_model($model) {
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$this->pages(); // Make sure the page cache is initialized, since we will be adding to it.
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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
*/
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public function mark_csync_changed() {
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global $DB;
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$DB->update_record(self::TABLE, ['id' => $this->id, "csync_flag" => 1]);
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// Manually set it in the cache, if something unexpected happened, an exception has already been thrown anyway.
$this->r->csync_flag = 1;
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}
/**
* Clear the csync mark
*/
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public function clear_csync_changed() {
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global $DB;
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$DB->update_record(self::TABLE, ['id' => $this->id, "csync_flag" => 0]);
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// Manually set it in the cache, if something unexpected happened, an exception has already been thrown anyway.
$this->r->csync_flag = 0;
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}
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public function has_csync_changed() {
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return ($this->r->csync_flag > 0) ? true : false;
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}
/**
* See if the specified course id is linked in this studyplan
*/
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public function course_linked($courseid) {
global $DB;
$sql = "SELECT COUNT(i.id)
FROM {local_treestudyplan}
INNER JOIN {local_treestudyplan_line} l ON p.id = l.studyplan_id
INNER JOIN {local_treestudyplan_item} i ON l.id = i.line_id
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WHERE p.id = :planid
AND i.course_id = :courseid";
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$count = $DB->get_field_sql($sql, ["courseid" => $courseid, "planid" => $this->id]);
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return ($count > 0) ? true : false;
}
/**
* List the course id is linked in this studyplan
* Used for cohort enrolment cascading
*/
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public function get_linked_course_ids() {
global $DB;
$sql = "SELECT i.course_id
FROM {local_treestudyplan} p
INNER JOIN {local_treestudyplan_page} pg ON p.id = pg.studyplan_id
INNER JOIN {local_treestudyplan_line} l ON pg.id = l.page_id
INNER JOIN {local_treestudyplan_item} i ON l.id = i.line_id
WHERE p.id = :studyplan_id AND i.type = :itemtype";
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$fields = $DB->get_fieldset_sql($sql, ["studyplan_id" => $this->id, "itemtype" => studyitem::COURSE]);
return $fields;
}
/**
* List the cohort id's associated with this studyplan
*/
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public function get_linked_cohort_ids() {
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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
*/
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public function get_linked_user_ids() {
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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 $fields;
}
/**
* See if the specified course id is linked in this studyplan
*/
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public function badge_linked($badgeid) {
global $DB;
$sql = "SELECT COUNT(i.id)
FROM {local_treestudyplan}
INNER JOIN {local_treestudyplan_line} l ON p.id = l.studyplan_id
INNER JOIN {local_treestudyplan_item} i ON l.id = i.line_id
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WHERE p.id = :planid
AND i.badge_id = :badgeid";
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$count = $DB->get_field_sql($sql, ["badgeid" => $badgeid, "planid" => $this->id]);
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return ($count > 0) ? true : false;
}
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}