Paul Holden
952747912c
This allows each class to define the type of data that they return, regardless of the type of column to which they are applied. This is the pre-cursor to work on graphing and filtering of aggregated data. E.g. a text field that is aggregated with "count" is returning numeric data rather than text.
78 lines
2.1 KiB
PHP
78 lines
2.1 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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declare(strict_types=1);
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namespace core_reportbuilder\local\aggregation;
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use lang_string;
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use core_reportbuilder\local\report\column;
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/**
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* Column max aggregation type
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*
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* @package core_reportbuilder
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* @copyright 2021 Paul Holden <paulh@moodle.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class max extends base {
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/**
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* Return aggregation name
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*
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* @return lang_string
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*/
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public static function get_name(): lang_string {
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return new lang_string('aggregationmax', 'core_reportbuilder');
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}
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/**
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* This aggregation can be performed on all numeric/date/boolean types
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*
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* @param int $columntype
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* @return bool
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*/
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public static function compatible(int $columntype): bool {
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return in_array($columntype, [
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column::TYPE_INTEGER,
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column::TYPE_FLOAT,
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column::TYPE_TIMESTAMP,
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column::TYPE_BOOLEAN,
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]);
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}
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/**
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* Return the aggregated field SQL
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*
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* @param string $field
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* @param int $columntype
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* @return string
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*/
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public static function get_field_sql(string $field, int $columntype): string {
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return "MAX({$field})";
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}
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/**
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* Returns aggregated column type
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*
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* @param int $columntype
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* @return int
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*/
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public static function get_column_type(int $columntype): int {
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return $columntype;
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}
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}
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