protected function _createSourcesGraph()
{
// load pChart graphic library
$this->_loadLibs();
// définition des données à afficher
$dataSet = new pData();
// need config, to know which data user wants to display : visits, unique visitors, pageviews
$sefConfig = Sh404sefFactory::getConfig();
// Google does not allow combining dimension=ga:medium with metric = unique visitors
$dataType = $sefConfig->analyticsDashboardDataType == 'ga:visitors' ? 'ga:visits' : $sefConfig->analyticsDashboardDataType;
$dataTypeString = str_replace('ga:', '', $dataType);
// sort data for proper display
usort($this->_rawData['sources'], array($this, '_sortSourcesDataCompareFunction'));
// we walk the array, pulling out alternatively
// the first and last items
// making the new array having the largest item
// followed by the smallest, then second largest
// then second smallest, ...
// which makes drawing labels much easier
$tmpArray = array();
$even = false;
$max = count($this->_rawData['sources']);
for ($i = 0; $i < $max; $i++) {
if ($even) {
// pull last item in sorted array
$tmpArray[] = array_pop($this->_rawData['sources']);
} else {
// pull array first item
$tmpArray[] = array_shift($this->_rawData['sources']);
}
// flag inversion
$even = !$even;
}
// get data from response
$data = array();
$types = array();
foreach ($tmpArray as $entry) {
$value = $entry->{$dataTypeString};
// do not add empty values, as pChart would choke on that and display a warning
if (!empty($value)) {
$data[] = $value;
$types[] = Sh404sefHelperAnalytics::getReferralLabel($entry->dimension['medium']);
}
}
$dataSet->AddPoint($data, "visits");
$dataSet->AddPoint($types, "types");
$dataSet->addSerie('visits');
$dataSet->SetAbsciseLabelSerie("types");
$label = JText::_('COM_SH404SEF_ANALYTICS_REPORT_SOURCES') . JText::_('COM_SH404SEF_ANALYTICS_REPORT_BY_LABEL') . Sh404sefHelperAnalytics::getDataTypeTitle();
$dataSet->SetSerieName($label, "visits");
// Initialise the graph
$w = intval(0.45 * $this->_options['cpWidth']);
$w = empty($w) ? 160 : $w;
$radius = intval($w * 0.22);
$margin = 5;
$h = intval($w * 0.8);
$centreX = intval(0.5 * $w);
$centreY = intval(0.5 * $h);
$chart = new pChart($w, $h);
$fontSize = 8;
// prepare graph
$chart->setFontProperties($this->_baseChartPath . DS . 'Fonts/arial.ttf', $fontSize);
$chart->loadColorPalette($this->_baseChartPath . DS . 'palettes' . DS . 'tones-2-green-soft.php');
$chart->setGraphArea($margin, $margin, $w - $margin, $h - $margin);
// This will draw a shadow under the pie chart
$chart->drawFilledCircle($centreX + 4, $centreY + 4, $radius, 200, 200, 200);
// Draw the pie chart
$d = $dataSet->GetData();
if (!empty($d)) {
$chart->drawBasicPieGraph($d, $dataSet->GetDataDescription(), $centreX, $centreY, $radius, PIE_PERCENTAGE_LABEL_VALUE, 255, 255, 218);
}
// create a temporary file for
$user =& JFactory::getUser();
// make sure the root tmp dir exists
$rootDir = 'tmp' . DS . 'sh404sef_analytics';
Sh404sefHelperFiles::createDirAndIndex(JPATH_ROOT . DS . $rootDir);
// file name is variable to avoid browser cache
$basePath = $rootDir . DS . md5('useless_' . $user->id . '_hashing') . DS;
// create path and make sure there's an index.html file in it
Sh404sefHelperFiles::createDirAndIndex(JPATH_ROOT . DS . $basePath);
$imageFileName = Sh404sefHelperAnalytics::createTempFile($basePath, $this->_options['report'] . '.' . $this->_options['accountId'] . '.sources.' . $dataTypeString);
$chart->Render(JPATH_ROOT . DS . $imageFileName);
// need cleaning up, so let's remove all report files for that user older than an hour or so
Sh404sefHelperAnalytics::cleanReportsImageFiles(JPATH_ROOT . DS . $basePath, $age = 4000);
return JURI::root() . $imageFileName;
}
