/**
* Return the chartjs structured array data for a line graph
*
* @param array $data Array of information to graph
* Includes: 'data': associative array of point label -> data point
* 'labels': labels for the lines
* 'colours': custom colours from the function to use instead of the defaults
* 'labellang': the lang file to find the label string translation
* 'configs': associative array of config overrides
* @param array $colours Custom colours from js to use instead of the defaults
* @param bool $cron If function is called from cron we don't want to reply via js
*
* @return array $graphdata An array structure that can be encoded to json for chartjs
*/
function get_line_graph_json($data, $colours = null, $cron = false)
{
if (empty($data['data'])) {
$data['empty'] = true;
if ($cron) {
return $data;
}
json_reply(false, array('data' => $data));
}
$data['colours'] = get_graph_colours($data, $colours);
$graphdata = array();
$x = 0;
$graphdata['labels'] = $data['labels'];
foreach ($data['data'] as $key => $value) {
$dataobj['fillColor'] = "rgba(" . $data['colours'][$x] . ",0.2)";
$dataobj['strokeColor'] = "rgba(" . $data['colours'][$x] . ",1)";
$dataobj['pointColor'] = "rgba(" . $data['colours'][$x] . ",1)";
$dataobj['pointStrokeColor'] = "rgba(255,255,255,1)";
$dataobj['pointHighlightFill'] = "rgba(255,255,255,1)";
$dataobj['pointHighlightStroke'] = "rgba(" . $data['colours'][$x] . ",1)";
$dataobj['label'] = !empty($data['labellang']) ? get_string($key, $data['labellang']) : $key;
$dataobj['data'] = is_array($value) ? array_values($value) : array($value);
$graphdata['datasets'][] = $dataobj;
$x = empty($data['colours'][$x + 1]) ? 0 : $x + 1;
}
$configs = isset($data['configs']) ? $data['configs'] : (object) array();
return array($graphdata, $configs);
}
$x = 0;
foreach ($jsondata[0] as $key => $option) {
foreach ($option as $optkey => $optval) {
if (preg_match('/^rgba\\(/', $optval)) {
$jsondata[0][$key]->{$optkey} = preg_replace('/\\((.*\\,)/', '(' . $colours[$x] . ',', $optval);
}
}
$x = empty($colours[$x + 1]) ? 0 : $x + 1;
}
}
$data['datastr'] = json_encode($jsondata[0]);
$data['configstr'] = json_encode($data['configs']);
json_reply(false, array('data' => $data));
}
$graphdata = array();
$data['colours'] = get_graph_colours($data, $colours);
// Now covert it to something Chart.js can understand
switch ($data['graph']) {
case 'Pie':
case 'PolarArea':
case 'Doughnut':
list($graphdata, $configs) = get_circular_graph_json($data, $colours);
break;
case 'Bar':
list($graphdata, $configs) = get_bar_graph_json($data, $colours);
break;
case 'Line':
list($graphdata, $configs) = get_line_graph_json($data, $colours);
break;
default:
}
