362 lines
12 KiB
PHP
362 lines
12 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 period descriptions
|
|
* @package local_treestudyplan
|
|
* @copyright 2023 P.M. Kuipers
|
|
* @license https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
|
|
*/
|
|
|
|
namespace local_treestudyplan;
|
|
|
|
use DateInterval;
|
|
|
|
defined('MOODLE_INTERNAL') || die();
|
|
|
|
require_once($CFG->libdir.'/externallib.php');
|
|
|
|
/**
|
|
* Model class for period descriptions
|
|
*/
|
|
class period {
|
|
/** @var string */
|
|
const TABLE = "local_treestudyplan_period";
|
|
/**
|
|
* Cache all retrieved periods in this session
|
|
* @var array */
|
|
private static $cache = [];
|
|
/**
|
|
* Cache the collection of periods per page retrieved this session
|
|
* @var array */
|
|
private static $pagecache = [];
|
|
|
|
/**
|
|
* Holds database record
|
|
* @var stdClass
|
|
*/
|
|
private $r;
|
|
/** @var int */
|
|
private $id;
|
|
/** @var studyplanpage */
|
|
private $page;
|
|
|
|
/**
|
|
* Shortcut to studyplan (page)'s aggregator
|
|
*/
|
|
public function aggregator() : aggregator {
|
|
return $this->page->aggregator();
|
|
}
|
|
|
|
/**
|
|
* Find record in database and return management object
|
|
* *Caches to avoid multiple creation events in one session.
|
|
* @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[$id];
|
|
}
|
|
|
|
/**
|
|
* Find a period by page and period number [1..$page->periods()]
|
|
* @param studyplanpage $page Studyplan page to find period for
|
|
* @param int $periodnr Period sequence nr [1..$page->periods()]
|
|
*/
|
|
public static function find(studyplanpage $page, $periodnr): self {
|
|
global $DB;
|
|
if ($periodnr < 1) {
|
|
// Clamp period index .
|
|
$periodnr = 1;
|
|
}
|
|
try {
|
|
$id = $DB->get_field(self::TABLE, "id", ["page_id" => $page->id(), "period" => $periodnr], MUST_EXIST);
|
|
$period = self::find_by_id($id);
|
|
} catch (\dml_missing_record_exception $x) {
|
|
// Period does not exist - create one ...
|
|
// Make a best guess estimate of the start and end date, based on surrounding periods,.
|
|
// Or specified duration of the page and the sequence of the periods .
|
|
$pcount = $page->periods();
|
|
$ystart = $page->startdate()->getTimestamp();
|
|
$yend = $page->enddate()->getTimestamp();
|
|
|
|
// Estimate the period's timing to make a reasonable first guess.
|
|
$ydelta = $yend - $ystart;
|
|
$ptime = $ydelta / $pcount;
|
|
|
|
try {
|
|
// Check if we have a previous period to glance the end date of as a reference.
|
|
$startdate = $DB->get_field(self::TABLE, "enddate",
|
|
["page_id" => $page->id(), "period" => $periodnr - 1], MUST_EXIST);
|
|
$pstart = strtotime($startdate) + (24 * 60 * 60); // Add one day.
|
|
} catch (\dml_missing_record_exception $x2) {
|
|
// If not, do a fair guess.
|
|
$pstart = $ystart + (($periodnr - 1) * $ptime);
|
|
}
|
|
try {
|
|
// Check if we have a next period to glance the start date of as a reference.
|
|
$enddate = $DB->get_field(self::TABLE, "startdate",
|
|
["page_id" => $page->id(), "period" => $periodnr + 1], MUST_EXIST);
|
|
$pstart = strtotime($enddate) - (24 * 60 * 60); // Subtract one day.
|
|
} catch (\dml_missing_record_exception $x) {
|
|
// If not, do a fair guess.
|
|
$pend = $pstart + $ptime;
|
|
}
|
|
|
|
// And create the period.
|
|
$period = self::add([
|
|
'page_id' => $page->id(),
|
|
'period' => $periodnr,
|
|
'fullname' => \get_string("period_default_fullname", "local_treestudyplan", $periodnr),
|
|
'shortname' => \get_string("period_default_shortname", "local_treestudyplan", $periodnr),
|
|
'startdate' => date("Y-m-d", $pstart),
|
|
'enddate' => date("Y-m-d", $pend),
|
|
]);
|
|
}
|
|
return $period;
|
|
}
|
|
|
|
|
|
/**
|
|
* Find all periods registered to a studyplan in sequence
|
|
* @param studyplanpage $page Studyplan page to find periods for
|
|
* @return period[]
|
|
*/
|
|
public static function find_for_page(studyplanpage $page): array {
|
|
$periods = [];
|
|
// Find and add the periods to an array with the period sequence as a key.
|
|
for ($i = 1; $i <= $page->periods(); $i++) {
|
|
$period = self::find($page, $i);
|
|
$periods[$i] = $period;
|
|
}
|
|
return $periods;
|
|
}
|
|
|
|
/**
|
|
* 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);
|
|
}
|
|
|
|
/**
|
|
* Return database identifier
|
|
* @return int
|
|
*/
|
|
public function id() {
|
|
return $this->id;
|
|
}
|
|
|
|
/**
|
|
* Return associated studyplan
|
|
* @return studyplan
|
|
*/
|
|
public function studyplan() : studyplan {
|
|
return $this->page->studyplan();
|
|
}
|
|
|
|
/**
|
|
* Return associated studyplan page
|
|
* @return studyplanpage
|
|
*/
|
|
public function page() {
|
|
return $this->page;
|
|
}
|
|
|
|
/**
|
|
* Return short name
|
|
* @return string
|
|
*/
|
|
public function shortname() {
|
|
return $this->r->shortname;
|
|
}
|
|
|
|
/**
|
|
* Return full name
|
|
* @return string
|
|
*/
|
|
public function fullname() {
|
|
return $this->r->fullname;
|
|
}
|
|
|
|
/**
|
|
* Return period sequence number
|
|
* @return int
|
|
*/
|
|
public function period() {
|
|
return $this->r->period;
|
|
}
|
|
|
|
/**
|
|
* Start date
|
|
* @return \DateTime
|
|
*/
|
|
public function startdate() {
|
|
return new \DateTime($this->r->startdate);
|
|
}
|
|
|
|
/**
|
|
* End date
|
|
* @return \DateTime
|
|
*/
|
|
public function enddate() {
|
|
if ($this->r->enddate && strlen($this->r->enddate) > 0) {
|
|
return new \DateTime($this->r->enddate);
|
|
} else {
|
|
// Return a date 2 months into the future if not set.... Yes, it needs to be set.
|
|
return (new \DateTime($this->r->startdate))->add(new \DateInterval("P2M"));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Webservice structure for basic info
|
|
* @param int $value Webservice requirement constant
|
|
*/
|
|
public static function structure($value = VALUE_REQUIRED) : \external_description {
|
|
return new \external_single_structure([
|
|
"id" => new \external_value(PARAM_INT, 'id of period'),
|
|
"fullname" => new \external_value(PARAM_TEXT, 'Full name of period'),
|
|
"shortname" => new \external_value(PARAM_TEXT, 'Short name of period'),
|
|
"period" => new \external_value(PARAM_INT, 'period sequence'),
|
|
"startdate" => new \external_value(PARAM_TEXT, 'start date of period'),
|
|
"enddate" => new \external_value(PARAM_TEXT, 'end date of period'),
|
|
], 'Period info', $value);
|
|
}
|
|
|
|
/**
|
|
* Webservice model for basic info
|
|
* @return array Webservice data model
|
|
*/
|
|
public function model() {
|
|
return [
|
|
'id' => $this->r->id,
|
|
'fullname' => $this->r->fullname,
|
|
'shortname' => $this->r->shortname,
|
|
'period' => $this->r->period,
|
|
'startdate' => $this->r->startdate,
|
|
'enddate' => $this->r->enddate,
|
|
];
|
|
}
|
|
|
|
/**
|
|
* Add a new period for a studyplan page
|
|
* Use only when performing import! The static find() and find_for_page() functions create the period during normal operation
|
|
* @param array $fields Properties for ['page_id', 'fullname', 'shortname', 'period', 'startdate', 'enddate']
|
|
*/
|
|
public static function add($fields) : self {
|
|
global $DB;
|
|
|
|
if (!isset($fields['page_id'])) {
|
|
throw new \InvalidArgumentException("parameter 'page_id' missing");
|
|
}
|
|
if (!isset($fields['period'])) {
|
|
throw new \InvalidArgumentException("parameter 'period' missing");
|
|
}
|
|
|
|
if ($DB->record_exists(self::TABLE, ["page_id" => $fields["page_id"], "period" => $fields["period"]])) {
|
|
throw new \InvalidArgumentException("record already exists for specified page and period");
|
|
}
|
|
|
|
$addable = ['page_id', 'fullname', 'shortname', 'period', 'startdate', 'enddate'];
|
|
$info = [ ];
|
|
foreach ($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); // Make sure the new page is immediately cached.
|
|
}
|
|
|
|
/**
|
|
* Edit period properties
|
|
* @param array $fields Properties for ['fullname', 'shortname', 'startdate', 'enddate']
|
|
*/
|
|
public function edit($fields) : self {
|
|
global $DB;
|
|
|
|
$pages = self::find_for_page($this->page());
|
|
$prev = (count($pages) > 2 && $this->period() >= 1) ? $pages[$this->period() - 1] : null;
|
|
$next = (count($pages) > $this->period()) ? $pages[$this->period() + 1] : null;
|
|
|
|
$editable = ['fullname', 'shortname', 'startdate', 'enddate'];
|
|
$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 and ensure end dates of previous period are adjusted if needed.
|
|
$this->r = $DB->get_record(self::TABLE, ['id' => $this->id], "*", MUST_EXIST);
|
|
|
|
// Adjust end date of previous period if needed.
|
|
if (isset($prev) && !empty($fields['startdate'])) {
|
|
$maxdate = $this->startdate()->sub(new DateInterval("P1D")); // Subtract 1 day, since periods include the end day.
|
|
$rqdate = $prev->enddate();
|
|
if ($maxdate < $rqdate) {
|
|
$prev->edit(["enddate" => $maxdate->format("Y-m-d")]);
|
|
}
|
|
}
|
|
|
|
// Adjust start date of next period if needed.
|
|
if (isset($next) && !empty($fields['enddate'])) {
|
|
$mindate = $this->enddate()->add(new DateInterval("P1D")); // Subtract 1 day, since periods include the end day.
|
|
$rqdate = $next->startdate();
|
|
if ($mindate > $rqdate) {
|
|
$next->edit(["startdate" => $mindate->format("Y-m-d")]);
|
|
}
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Delete period
|
|
*/
|
|
public function delete() : success {
|
|
global $DB;
|
|
$DB->delete_records(self::TABLE, ['id' => $this->id]);
|
|
return success::success();
|
|
}
|
|
|
|
/**
|
|
* Webservice structure for list of periods in page
|
|
* @param int $value Webservice requirement constant
|
|
*/
|
|
public static function page_structure($value = VALUE_REQUIRED) : \external_description {
|
|
return new \external_multiple_structure(self::structure(), "The periods in the page", $value);
|
|
}
|
|
|
|
/**
|
|
* Webservice model list of periods in page
|
|
* @param studyplanpage $page The page to create the model for
|
|
* @return array Webservice data model
|
|
*/
|
|
public static function page_model(studyplanpage $page) : array {
|
|
$model = [];
|
|
foreach (self::find_for_page($page,true) as $p) {
|
|
$model[] = $p->model();
|
|
}
|
|
return $model;
|
|
}
|
|
}
|