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<?php

protected function loadDataAndLabels($data) {
	$formatted = array(
		'cols' => array(),
		'rows' => array()
	);
	foreach ($data['labels'] as $labels) {
		foreach ($labels as $type => $label) {
			$formatted['cols'][] = compact('label', 'type');
		}
	}
	foreach ($data['data'] as $datum) {
		$entry = array_map(function($entry) {
			return array('v' => $entry);
		}, $datum);
		$formatted['rows'][] = array(
			'c' => $entry
		);
	}
	return json_encode($formatted);
}

<?php

protected function loadDataAndLabels($data, $graph_type) {
	$o = '';
	foreach($data['labels'] as $label) {
		foreach($label as $type => $label_name) {
			$o.= "data.addColumn('$type', '$label_name');\n";
		}
	}
	$data_count = count($data['data']);
	$label_count = count($data['labels']);
	$o.= "data.addRows($data_count);\n";
	for($i = 0; $i < $data_count; $i++) {
		for($j=0; $j < $label_count; $j++) {
			$value = $data['data'][$i][$j];
			$type = key($data['labels'][$j]);
			if($type == 'string') {
				$o.= "data.{$this->chart_types[$graph_type]['data_method']}($i, $j, '$value');\n";
			} else {
				$o.= "data.{$this->chart_types[$graph_type]['data_method']}($i, $j, $value);\n";
			}
		}
	}
	return $o;
}