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<?php

class FusionCharts {
        
        private $constructorOptions = [];
        private $constructorTemplate = <<<EOD
        <script type="text/javascript">
            FusionCharts.ready(function () {
                new FusionCharts(__constructorOptions__);
            });
        </script>
EOD;
        private $renderTemplate = <<<EOD
        <script type='text/javascript'>
            FusionCharts.ready(function () {
                FusionCharts("__chartId__").render();
            });
        </script>
EOD;

// constructor
        function __construct($type, $id, $width = 400, $height = 300, $renderAt, $dataFormat, $dataSource) {
            isset($type) ? $this->constructorOptions['type'] = $type : '';
            isset($id) ? $this->constructorOptions['id'] = $id : 'php-fc-'.time();
            isset($width) ? $this->constructorOptions['width'] = $width : '';
            isset($height) ? $this->constructorOptions['height'] = $height : '';
            isset($renderAt) ? $this->constructorOptions['renderAt'] = $renderAt : '';
            isset($dataFormat) ? $this->constructorOptions['dataFormat'] = $dataFormat : '';
            isset($dataSource) ? $this->constructorOptions['dataSource'] = $dataSource : '';

$tempArray = [];
            foreach($this->constructorOptions as $key => $value) {
                if ($key === 'dataSource') {
                    $tempArray['dataSource'] = '__dataSource__';
                } else {
                    $tempArray[$key] = $value;
                }
            }
            
            $jsonEncodedOptions = json_encode($tempArray);
            
            if ($dataFormat === 'json') {
                $jsonEncodedOptions = preg_replace('/\"__dataSource__\"/', $this->constructorOptions['dataSource'], $jsonEncodedOptions);
            } elseif ($dataFormat === 'xml') { 
                $jsonEncodedOptions = preg_replace('/\"__dataSource__\"/', '\'__dataSource__\'', $jsonEncodedOptions);
                $jsonEncodedOptions = preg_replace('/__dataSource__/', $this->constructorOptions['dataSource'], $jsonEncodedOptions);
            } elseif ($dataFormat === 'xmlurl') {
                $jsonEncodedOptions = preg_replace('/__dataSource__/', $this->constructorOptions['dataSource'], $jsonEncodedOptions);
            } elseif ($dataFormat === 'jsonurl') {
                $jsonEncodedOptions = preg_replace('/__dataSource__/', $this->constructorOptions['dataSource'], $jsonEncodedOptions);
            }
            $newChartHTML = preg_replace('/__constructorOptions__/', $jsonEncodedOptions, $this->constructorTemplate);

echo $newChartHTML;
        }

// render the chart created
        // It prints a script and calls the FusionCharts javascript render method of created chart
        function render() {
           $renderHTML = preg_replace('/__chartId__/', $this->constructorOptions['id'], $this->renderTemplate);
           echo $renderHTML;
        }

}
?>