AutorÃa | Ultima modificación | Ver Log |
<?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/>.
declare(strict_types=1);
namespace core_reportbuilder\local\filters;
use DateTimeImmutable;
use lang_string;
use MoodleQuickForm;
use core_reportbuilder\local\helpers\database;
/**
* Date report filter
*
* This filter accepts a unix timestamp to perform date filtering on
*
* @package core_reportbuilder
* @copyright 2021 Paul Holden <paulh@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class date extends base {
/** @var int Any value */
public const DATE_ANY = 0;
/** @var int Non-empty (positive) value */
public const DATE_NOT_EMPTY = 1;
/** @var int Empty (zero) value */
public const DATE_EMPTY = 2;
/** @var int Date within defined range */
public const DATE_RANGE = 3;
/** @var int Date in the last [X relative date unit(s)] */
public const DATE_LAST = 4;
/** @var int Date in the previous [X relative date unit(s)] Kept for backwards compatibility */
public const DATE_PREVIOUS = self::DATE_LAST;
/** @var int Date in current [relative date unit] */
public const DATE_CURRENT = 5;
/** @var int Date in the next [X relative date unit(s)] */
public const DATE_NEXT = 6;
/** @var int Date in the past */
public const DATE_PAST = 7;
/** @var int Date in the future */
public const DATE_FUTURE = 8;
/** @var int Date before [X relative date unit(s)] */
public const DATE_BEFORE = 9;
/** @var int Date after [X relative date unit(s)] */
public const DATE_AFTER = 10;
/** @var int Relative date unit for an hour */
public const DATE_UNIT_HOUR = 0;
/** @var int Relative date unit for a day */
public const DATE_UNIT_DAY = 1;
/** @var int Relative date unit for a week */
public const DATE_UNIT_WEEK = 2;
/** @var int Relative date unit for a month */
public const DATE_UNIT_MONTH = 3;
/** @var int Relative date unit for a month */
public const DATE_UNIT_YEAR = 4;
/**
* Return an array of operators available for this filter
*
* @return lang_string[]
*/
private function get_operators(): array {
$operators = [
self::DATE_ANY => new lang_string('filterisanyvalue', 'core_reportbuilder'),
self::DATE_NOT_EMPTY => new lang_string('filterisnotempty', 'core_reportbuilder'),
self::DATE_EMPTY => new lang_string('filterisempty', 'core_reportbuilder'),
self::DATE_RANGE => new lang_string('filterrange', 'core_reportbuilder'),
self::DATE_BEFORE => new lang_string('filterdatebefore', 'core_reportbuilder'),
self::DATE_AFTER => new lang_string('filterdateafter', 'core_reportbuilder'),
self::DATE_LAST => new lang_string('filterdatelast', 'core_reportbuilder'),
self::DATE_CURRENT => new lang_string('filterdatecurrent', 'core_reportbuilder'),
self::DATE_NEXT => new lang_string('filterdatenext', 'core_reportbuilder'),
self::DATE_PAST => new lang_string('filterdatepast', 'core_reportbuilder'),
self::DATE_FUTURE => new lang_string('filterdatefuture', 'core_reportbuilder'),
];
return $this->filter->restrict_limited_operators($operators);
}
/**
* Setup form
*
* @param MoodleQuickForm $mform
*/
public function setup_form(MoodleQuickForm $mform): void {
// Operator selector.
$operatorlabel = get_string('filterfieldoperator', 'core_reportbuilder', $this->get_header());
$typesnounit = [self::DATE_ANY, self::DATE_NOT_EMPTY, self::DATE_EMPTY, self::DATE_RANGE,
self::DATE_PAST, self::DATE_FUTURE];
$elements[] = $mform->createElement('select', "{$this->name}_operator", $operatorlabel, $this->get_operators());
$mform->setType("{$this->name}_operator", PARAM_INT);
$mform->setDefault("{$this->name}_operator", self::DATE_ANY);
// Value selector for last and next operators.
$valuelabel = get_string('filterfieldvalue', 'core_reportbuilder', $this->get_header());
$elements[] = $mform->createElement('text', "{$this->name}_value", $valuelabel, ['size' => 3]);
$mform->setType("{$this->name}_value", PARAM_INT);
$mform->setDefault("{$this->name}_value", 1);
$mform->hideIf("{$this->name}_value", "{$this->name}_operator", 'in', array_merge($typesnounit, [self::DATE_CURRENT]));
// Unit selector for last and next operators.
$unitlabel = get_string('filterfieldunit', 'core_reportbuilder', $this->get_header());
$units = [
self::DATE_UNIT_HOUR => get_string('filterdatehours', 'core_reportbuilder'),
self::DATE_UNIT_DAY => get_string('filterdatedays', 'core_reportbuilder'),
self::DATE_UNIT_WEEK => get_string('filterdateweeks', 'core_reportbuilder'),
self::DATE_UNIT_MONTH => get_string('filterdatemonths', 'core_reportbuilder'),
self::DATE_UNIT_YEAR => get_string('filterdateyears', 'core_reportbuilder'),
];
$elements[] = $mform->createElement('select', "{$this->name}_unit", $unitlabel, $units);
$mform->setType("{$this->name}_unit", PARAM_INT);
$mform->setDefault("{$this->name}_unit", self::DATE_UNIT_DAY);
$mform->hideIf("{$this->name}_unit", "{$this->name}_operator", 'in', $typesnounit);
// Add operator/value/unit group.
$mform->addGroup($elements, "{$this->name}_group", $this->get_header(), '', false)
->setHiddenLabel(true);
// Date selectors for range operator.
$mform->addElement('date_selector', "{$this->name}_from", get_string('filterdatefrom', 'core_reportbuilder'),
['optional' => true]);
$mform->setType("{$this->name}_from", PARAM_INT);
$mform->setDefault("{$this->name}_from", 0);
$mform->hideIf("{$this->name}_from", "{$this->name}_operator", 'neq', self::DATE_RANGE);
$mform->addElement('date_selector', "{$this->name}_to", get_string('filterdateto', 'core_reportbuilder'),
['optional' => true]);
$mform->setType("{$this->name}_to", PARAM_INT);
$mform->setDefault("{$this->name}_to", 0);
$mform->hideIf("{$this->name}_to", "{$this->name}_operator", 'neq', self::DATE_RANGE);
}
/**
* Return filter SQL
*
* @param array $values
* @return array
*/
public function get_sql_filter(array $values): array {
$fieldsql = $this->filter->get_field_sql();
$params = $this->filter->get_field_params();
$operator = (int) ($values["{$this->name}_operator"] ?? self::DATE_ANY);
$dateunitvalue = (int) ($values["{$this->name}_value"] ?? 1);
$dateunit = (int) ($values["{$this->name}_unit"] ?? self::DATE_UNIT_DAY);
switch ($operator) {
case self::DATE_NOT_EMPTY:
$sql = "COALESCE({$fieldsql}, 0) <> 0";
break;
case self::DATE_EMPTY:
$sql = "COALESCE({$fieldsql}, 0) = 0";
break;
case self::DATE_RANGE:
$sql = '';
$datefrom = (int)($values["{$this->name}_from"] ?? 0);
$dateto = (int)($values["{$this->name}_to"] ?? 0);
[$paramdatefrom, $paramdateto] = database::generate_param_names(2);
if ($datefrom > 0 && $dateto > 0) {
$sql = "{$fieldsql} BETWEEN :{$paramdatefrom} AND :{$paramdateto}";
$params[$paramdatefrom] = $datefrom;
$params[$paramdateto] = $dateto;
} else if ($datefrom > 0) {
$sql = "{$fieldsql} >= :{$paramdatefrom}";
$params[$paramdatefrom] = $datefrom;
} else if ($dateto > 0) {
$sql = "{$fieldsql} < :{$paramdateto}";
$params[$paramdateto] = $dateto;
}
break;
case self::DATE_BEFORE:
$param = database::generate_param_name();
// We can use the start date of the "Last" operator as the end date here.
$sql = "{$fieldsql} < :{$param}";
$params[$param] = self::get_relative_timeframe(self::DATE_LAST, $dateunitvalue, $dateunit)[0];
break;
case self::DATE_AFTER:
$param = database::generate_param_name();
// We can use the end date of the "Next" operator as the start date here.
$sql = "{$fieldsql} > :{$param}";
$params[$param] = self::get_relative_timeframe(self::DATE_NEXT, $dateunitvalue, $dateunit)[1];
break;
// Relative helper method can handle these three cases.
case self::DATE_LAST:
case self::DATE_CURRENT:
case self::DATE_NEXT:
// Last and next operators require a unit value greater than zero.
if ($operator !== self::DATE_CURRENT && $dateunitvalue === 0) {
return ['', []];
}
// Generate parameters and SQL clause for the relative date comparison.
[$paramdatefrom, $paramdateto] = database::generate_param_names(2);
$sql = "{$fieldsql} BETWEEN :{$paramdatefrom} AND :{$paramdateto}";
[
$params[$paramdatefrom],
$params[$paramdateto],
] = self::get_relative_timeframe($operator, $dateunitvalue, $dateunit);
break;
case self::DATE_PAST:
$param = database::generate_param_name();
$sql = "{$fieldsql} < :{$param}";
$params[$param] = time();
break;
case self::DATE_FUTURE:
$param = database::generate_param_name();
$sql = "{$fieldsql} > :{$param}";
$params[$param] = time();
break;
default:
// Invalid or inactive filter.
return ['', []];
}
return [$sql, $params];
}
/**
* Return start and end time of given relative date period
*
* @param int $operator One of the ::DATE_LAST/CURRENT/NEXT constants
* @param int $dateunitvalue Unit multiplier of the date unit
* @param int $dateunit One of the ::DATE_UNIT_* constants
* @return int[] Timestamps representing the start/end of timeframe
*/
private static function get_relative_timeframe(int $operator, int $dateunitvalue, int $dateunit): array {
// Initialise start/end time to now.
$datestart = $dateend = new DateTimeImmutable();
switch ($dateunit) {
case self::DATE_UNIT_HOUR:
if ($operator === self::DATE_CURRENT) {
$hour = (int) $datestart->format('G');
$datestart = $datestart->setTime($hour, 0);
$dateend = $dateend->setTime($hour, 59, 59);
} else if ($operator === self::DATE_LAST) {
$datestart = $datestart->modify("-{$dateunitvalue} hour");
} else if ($operator === self::DATE_NEXT) {
$dateend = $dateend->modify("+{$dateunitvalue} hour");
}
break;
case self::DATE_UNIT_DAY:
if ($operator === self::DATE_CURRENT) {
$datestart = $datestart->setTime(0, 0);
$dateend = $dateend->setTime(23, 59, 59);
} else if ($operator === self::DATE_LAST) {
$datestart = $datestart->modify("-{$dateunitvalue} day");
} else if ($operator === self::DATE_NEXT) {
$dateend = $dateend->modify("+{$dateunitvalue} day");
}
break;
case self::DATE_UNIT_WEEK:
if ($operator === self::DATE_CURRENT) {
// The first day of the week is determined by site calendar configuration/preferences.
$startweekday = \core_calendar\type_factory::get_calendar_instance()->get_starting_weekday();
$weekdays = ['sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat'];
// If calculated start of week is after today (today is Tues/start of week is Weds), move back a week.
$datestartnow = $datestart->getTimestamp();
$datestart = $datestart->modify($weekdays[$startweekday] . ' this week')->setTime(0, 0);
if ($datestart->getTimestamp() > $datestartnow) {
$datestart = $datestart->modify('-1 week');
}
$dateend = $datestart->modify('+6 day')->setTime(23, 59, 59);
} else if ($operator === self::DATE_LAST) {
$datestart = $datestart->modify("-{$dateunitvalue} week");
} else if ($operator === self::DATE_NEXT) {
$dateend = $dateend->modify("+{$dateunitvalue} week");
}
break;
case self::DATE_UNIT_MONTH:
if ($operator === self::DATE_CURRENT) {
$datestart = $datestart->modify('first day of this month')->setTime(0, 0);
$dateend = $dateend->modify('last day of this month')->setTime(23, 59, 59);
} else if ($operator === self::DATE_LAST) {
$datestart = $datestart->modify("-{$dateunitvalue} month");
} else if ($operator === self::DATE_NEXT) {
$dateend = $dateend->modify("+{$dateunitvalue} month");
}
break;
case self::DATE_UNIT_YEAR:
if ($operator === self::DATE_CURRENT) {
$datestart = $datestart->modify('first day of january this year')->setTime(0, 0);
$dateend = $dateend->modify('last day of december this year')->setTime(23, 59, 59);
} else if ($operator === self::DATE_LAST) {
$datestart = $datestart->modify("-{$dateunitvalue} year");
} else if ($operator === self::DATE_NEXT) {
$dateend = $dateend->modify("+{$dateunitvalue} year");
}
break;
}
return [
$datestart->getTimestamp(),
$dateend->getTimestamp(),
];
}
/**
* Return sample filter values
*
* @return array
*/
public function get_sample_values(): array {
return [
"{$this->name}_operator" => self::DATE_CURRENT,
"{$this->name}_unit" => self::DATE_UNIT_WEEK,
];
}
}