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<?php
/**
* Piwik - free/libre analytics platform
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik\Plugins\CoreVisualizations\Visualizations\JqplotGraph;
use Piwik\Common;
use Piwik\DataTable;
use Piwik\Period\Range;
use Piwik\Plugins\CoreVisualizations\JqplotDataGenerator;
use Piwik\Plugins\CoreVisualizations\Visualizations\JqplotGraph;
use Piwik\Site;
/**
* Visualization that renders HTML for a line graph using jqPlot.
*
* @property Evolution\Config $config
*/
class Evolution extends JqplotGraph
{
const ID = 'graphEvolution';
const SERIES_COLOR_COUNT = 8;
public static function getDefaultConfig()
{
return new Evolution\Config();
}
public function beforeRender()
{
parent::beforeRender();
$this->config->show_flatten_table = false;
$this->config->datatable_js_type = 'JqplotEvolutionGraphDataTable';
}
public function beforeLoadDataTable()
{
$this->calculateEvolutionDateRange();
parent::beforeLoadDataTable();
// period will be overridden when 'range' is requested in the UI
// but the graph will display for each day of the range.
// Default 'range' behavior is to return the 'sum' for the range
if (Common::getRequestVar('period', false) == 'range') {
$this->requestConfig->request_parameters_to_modify['period'] = 'day';
}
$this->config->custom_parameters['columns'] = $this->config->columns_to_display;
}
public function afterAllFiltersAreApplied()
{
parent::afterAllFiltersAreApplied();
if (false === $this->config->x_axis_step_size) {
$rowCount = $this->dataTable->getRowsCount();
$this->config->x_axis_step_size = $this->getDefaultXAxisStepSize($rowCount);
}
}
protected function makeDataGenerator($properties)
{
return JqplotDataGenerator::factory('evolution', $properties);
}
/**
* Based on the period, date and evolution_{$period}_last_n query parameters,
* calculates the date range this evolution chart will display data for.
*/
private function calculateEvolutionDateRange()
{
$period = Common::getRequestVar('period');
$idSite = Common::getRequestVar('idSite');
$timezone = Site::getTimezoneFor($idSite);
$defaultLastN = self::getDefaultLastN($period);
$originalDate = Common::getRequestVar('date', 'last' . $defaultLastN, 'string');
if ('range' != $period) { // show evolution limit if the period is not a range
// set the evolution_{$period}_last_n query param
if (Range::parseDateRange($originalDate)) {
// if a multiple period
// overwrite last_n param using the date range
$oPeriod = new Range($period, $originalDate, $timezone);
$lastN = count($oPeriod->getSubperiods());
} else {
// if not a multiple period
list($newDate, $lastN) = self::getDateRangeAndLastN($period, $originalDate, $defaultLastN);
$this->requestConfig->request_parameters_to_modify['date'] = $newDate;
$this->config->custom_parameters['dateUsedInGraph'] = $newDate;
}
$lastNParamName = self::getLastNParamName($period);
$this->config->custom_parameters[$lastNParamName] = $lastN;
}
}
/**
* Returns the entire date range and lastN value for the current request, based on
* a period type and end date.
*
* @param string $period The period type, 'day', 'week', 'month' or 'year'
* @param string $endDate The end date.
* @param int|null $defaultLastN The default lastN to use. If null, the result of
* getDefaultLastN is used.
* @return array An array w/ two elements. The first is a whole date range and the second
* is the lastN number used, ie, array('2010-01-01,2012-01-02', 2).
*/
public static function getDateRangeAndLastN($period, $endDate, $defaultLastN = null)
{
if ($defaultLastN === null) {
$defaultLastN = self::getDefaultLastN($period);
}
$lastNParamName = self::getLastNParamName($period);
$lastN = Common::getRequestVar($lastNParamName, $defaultLastN, 'int');
$site = new Site(Common::getRequestVar('idSite'));
$dateRange = Range::getRelativeToEndDate($period, 'last' . $lastN, $endDate, $site);
return array($dateRange, $lastN);
}
/**
* Returns the default last N number of dates to display for a given period.
*
* @param string $period 'day', 'week', 'month' or 'year'
* @return int
*/
public static function getDefaultLastN($period)
{
switch ($period) {
case 'week':
return 26;
case 'month':
return 24;
case 'year':
return 5;
case 'day':
default:
return 30;
}
}
/**
* Returns the query parameter that stores the lastN number of periods to get for
* the evolution graph.
*
* @param string $period The period type, 'day', 'week', 'month' or 'year'.
* @return string
*/
public static function getLastNParamName($period)
{
return "evolution_{$period}_last_n";
}
public function getDefaultXAxisStepSize($countGraphElements)
{
// when the number of elements plotted can be small, make sure the X legend is useful
if ($countGraphElements <= 7) {
return 1;
}
$periodLabel = Common::getRequestVar('period');
switch ($periodLabel) {
case 'day':
case 'range':
$steps = 5;
break;
case 'week':
$steps = 4;
break;
case 'month':
$steps = 5;
break;
case 'year':
$steps = 5;
break;
default:
$steps = 5;
break;
}
$paddedCount = $countGraphElements + 2; // pad count so last label won't be cut off
return ceil($paddedCount / $steps);
}
}
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