DashboardPanelChart.module

<?php namespace Daun\Dashboard;

use function ProcessWire\__;

// Include abstract panel base class
require_once dirname(__DIR__).'/Dashboard/DashboardPanel.class.php';

class DashboardPanelChart extends DashboardPanel
{
    public static function getModuleInfo()
    {
        return array_merge(
            parent::getModuleInfo(),
            [
                'title'    => __('Dashboard Panel: Chart', __FILE__),
                'summary'  => __('Display a customizable chart from any data source', __FILE__),
                'author'   => 'Philipp Daun',
                'version'  => '1.5.7',
            ]
        );
    }

    public function getIcon()
    {
        return 'pie-chart';
    }

    public function getContent()
    {
        return $this->view('panels/chart', [
            'theme'   => $this->theme,
            'default' => $this->defaultTheme,
            'chart'   => $this->chart,
            'padding' => $this->padding,
        ]);
    }

    public function setup()
    {
        parent::setup();
        $this->theme = $this->data['theme'] ?? false;
        $this->defaultTheme = $this->getDefaultTheme();
        $this->chart = $this->parseChartData($this->data['chart'] ?? []);
        $this->aspectRatio = $this->chart['options']['aspectRatio'] ?? 0;
        $this->padding = $this->aspectRatioPadding($this->aspectRatio);
    }

    public function getScripts()
    {
        return ['https://cdn.jsdelivr.net/npm/chart.js@2.9.4'];
    }

    /**
     * Manipulate the chart data if necessary.
     */
    public function ___parseChartData($data)
    {
        return $data;
    }

    /**
     * Get the name of the default color theme.
     */
    public function ___getDefaultTheme()
    {
        return 'processwire';
    }

    /**
     * Calculate bottom padding for aspect ratio placeholder.
     */
    protected function aspectRatioPadding($ratio)
    {
        if ($ratio <= 0) {
            return '';
        }
        $padding = 100 / $ratio;
        $padding = number_format($padding, 2, '.', '');

        return "padding-bottom: {$padding}%;";
    }
}