93 lines
2.7 KiB
PHP
93 lines
2.7 KiB
PHP
<?php
|
|
/**
|
|
* @copyright Copyright (c) 2010, The volkszaehler.org project
|
|
* @package default
|
|
* @license http://www.opensource.org/licenses/gpl-license.php GNU Public License
|
|
*/
|
|
/*
|
|
* This file is part of volkzaehler.org
|
|
*
|
|
* volkzaehler.org 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
|
|
* any later version.
|
|
*
|
|
* volkzaehler.org 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 volkszaehler.org. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
namespace Volkszaehler\Interpreter;
|
|
|
|
/**
|
|
* Sensor interpreter
|
|
*
|
|
* @package default
|
|
* @author Steffen Vogel <info@steffenvogel.de>
|
|
*/
|
|
use Volkszaehler\Util;
|
|
|
|
class SensorInterpreter extends Interpreter {
|
|
|
|
/**
|
|
* @todo untested
|
|
* @param string|integer $groupBy
|
|
*/
|
|
public function getValues($tuples = NULL, $groupBy = NULL) {
|
|
$data = parent::getData($tuples, $groupBy);
|
|
|
|
$values = array();
|
|
foreach ($data as $reading) {
|
|
$values[] = array(
|
|
(float) $reading[0],
|
|
(float) $reading[1] / $reading[2],
|
|
(int) $reading[2]
|
|
);
|
|
}
|
|
|
|
return $values;
|
|
}
|
|
|
|
/**
|
|
* Fetch the smallest value from database
|
|
* @internal doesn't fits the SQL standard
|
|
* @return array (0 => timestamp, 1 => value)
|
|
*/
|
|
public function getMin() {
|
|
$min = $this->conn->fetchAssoc('SELECT value, timestamp FROM data WHERE channel_id = ?' . parent::buildDateTimeFilterSQL($this->from, $this->to) . ' ORDER BY value ASC LIMIT 1', array($this->channel->getId()));
|
|
return ($min) ? array_map('floatval', $min) : NULL;
|
|
}
|
|
|
|
/**
|
|
* Fetch the greatest value from the database
|
|
* @internal doesn't fits the SQL standard
|
|
* @return array (0 => timestamp, 1 => value)
|
|
*/
|
|
public function getMax() {
|
|
$max = $this->conn->fetchAssoc('SELECT value, timestamp FROM data WHERE channel_id = ?' . parent::buildDateTimeFilterSQL($this->from, $this->to) . ' ORDER BY value DESC LIMIT 1', array($this->channel->getId()));
|
|
return ($max) ? array_map('floatval', $max) : NULL;
|
|
}
|
|
|
|
/**
|
|
* Fetch the average value from the database
|
|
* @internal doesn't fits the SQL standard
|
|
* @return float
|
|
*/
|
|
public function getAverage() {
|
|
return (float) $this->conn->fetchColumn('SELECT AVG(value) FROM data WHERE channel_id = ?' . parent::buildDateTimeFilterSQL($this->from, $this->to), array($this->channel->getId()), 0);
|
|
}
|
|
|
|
/**
|
|
* @todo possible and/or required?
|
|
* @return float
|
|
*/
|
|
public function getConsumption() {
|
|
|
|
}
|
|
}
|
|
|
|
?>
|