HistogramTransform.php
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<?php
/*
"Contact Form to Database" Copyright (C) 2011-2012 Michael Simpson (email : michael.d.simpson@gmail.com)
This file is part of Contact Form to Database.
Contact Form to Database 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.
Contact Form to Database 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 Contact Form to Database.
If not, see <http://www.gnu.org/licenses/>.
*/
require_once('CFDBTransform.php');
abstract class HistogramTransform implements CFDBTransform {
/**
* @var string field holding the value
*/
var $valueField;
/**
* @var string field to group by
*/
var $groupByField;
/**
* @var array of name => value
*/
var $values = array();
function __construct($valueField, $groupByField) {
$this->valueField = $valueField;
$this->groupByField = $groupByField;
}
// https://bugs.php.net/bug.php?id=43200
// abstract method also defined interface is an error in PHP 5.0.0 - 5.3.8
//abstract public function addEntry(&$entry);
public function getTransformedData() {
$data = array();
foreach ($this->values as $name => $value) {
if (empty($this->groupByField)) {
$data[] = array($this->valueField => $value);
} else {
$data[] = array($this->groupByField => $name, $this->valueField => $value);
}
}
return $data;
}
}