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<?php
/**
* MIT licence
* Version 1.1.0
* Sjaak Priester, Amsterdam 29-10-2015... 17-09-2017.
*
* Google Charts widget for Yii 2.0 framework
* @link https://developers.google.com/chart/
*/
namespace sjaakp\gcharts;
use Yii;
use yii\base\Widget;
use yii\base\InvalidConfigException;
use yii\base\Model;
use yii\helpers\Html;
use yii\helpers\ArrayHelper;
use yii\helpers\Inflector;
use yii\helpers\Json;
use yii\web\View;
use yii\web\JsExpression;
class Chart extends Widget {
/**
* @var string
* 'current'
* 'upcoming'
* number
* @link https://developers.google.com/chart/interactive/docs/basic_load_libs#load-version-name-or-number
*/
public $version = 'current';
/**
* @var string
* 'classic'
* 'material' Google Charts new design
* 'transition' same as 'material', but options will be converted
*/
public $mode = 'classic';
/**
* @var \yii\data\DataProviderInterface the data provider for the chart. This property is required.
*/
public $dataProvider;
public $columns;
public $height = '300px';
public $width;
/**
* @var array
* Client options for Google Charts.
* @link https://developers.google.com/chart
*/
public $options = [];
/**
* @var array event => Javascript
* @link https://developers.google.com/chart/interactive/docs/events
*/
public $events = [];
/**
* @var array
* HTML options of the chart container.
* Use this if you want to explicitly set the ID.
*/
public $htmlOptions = [];
protected static $loadOptions = [
'packages' => [],
];
protected static $jsLoaded = '';
public function init() {
if (is_null($this->dataProvider)) {
throw new InvalidConfigException('The "dataProvider" property must be set.');
}
if (isset($this->htmlOptions['id'])) {
$this->setId($this->htmlOptions['id']);
}
else $this->htmlOptions['id'] = $this->getId();
$style = "height:$this->height;";
if (! empty($this->width)) $style .= "width:$this->width;";
$this->htmlOptions['style'] = $style;
$this->columns = array_map(function($v) {
if (is_string($v)) {
if (!preg_match('/^([^:]+)(:(\w*))?(:(.*))?$/', $v, $matches)) {
throw new InvalidConfigException('Column must be specified in the format of "attribute", "attribute:type" or "attribute:type:label"');
}
$v = [
'attribute' => $matches[1],
'type' => isset($matches[3]) ? $matches[3] : 'number',
'label' => isset($matches[5]) ? $matches[5] : null,
];
}
return $v;
}, $this->columns);
$view = $this->getView();
$view->registerJsFile('//www.gstatic.com/charts/loader.js');
}
public function run() {
$view = $this->getView();
$lo = array_merge(self::$loadOptions, [
'callback' => new JsExpression('drawChart'),
'language' => Yii::$app->language
]);
$loadOpts = Json::encode($lo);
$allJs = self::$jsLoaded;
$view->registerJs("google.charts.load('{$this->version}',$loadOpts);function drawChart(){{$allJs}};",
View::POS_END, __NAMESPACE__);
echo Html::tag('div', '', $this->htmlOptions);
}
protected function loadPackages($packs) {
if (is_string($packs)) $packs = [$packs];
$loaded = &self::$loadOptions['packages'];
foreach ($packs as $pack) {
if (! in_array($pack, $loaded)) $loaded[] = $pack;
}
}
protected function drawChart($js) {
foreach ($this->events as $evt => $code) {
$js .= "google.visualization.events.addListener($this->id,'$evt',$code);";
}
self::$jsLoaded .= $js;
}
protected function dataTable() {
$provider = $this->dataProvider;
$models = $provider->getModels();
$model = reset($models);
$cols = array_map(function($v) use ($model) {
$r = [
'label' => $this->colLabel($model, $v),
'type' => $this->colType($v),
];
if (isset($v['pattern'])) $r['pattern'] = $v['pattern'];
if (isset($v['role'])) $r['p'] = [ 'role' => $v['role']];
return $r;
}, $this->columns);
$index = 0;
$rows = array_map(function($model) use(&$index) {
$cells = array_map(function($column) use($model, &$index) {
$r = $this->cell($model, $column, $index);
return $r;
}, $this->columns);
$index++;
return [
'c' => $cells
];
}, $models);
$jTable = self::encode([
'cols' => $cols,
'rows' => $rows
]);
return "new google.visualization.DataTable($jTable)";
}
protected function colLabel($model, $col) {
$label = ArrayHelper::getValue($col, 'label');
if (is_null($label)) { // label may be explicitly set to empty text
$attr = $this->colAttribute($col);
if ($model instanceof Model) $label = $model->getAttributeLabel($attr);
else $label = Inflector::camel2words($attr);
}
return $label;
}
protected function cell($model, $col, $index) {
$attr = $this->colAttribute($col);
$value = ArrayHelper::getValue($col, 'value');
if (is_callable($value)) $value = call_user_func($value, $model, $attr, $index, $this);
$formatted = ArrayHelper::getValue($col, 'formatted');
if (is_callable($formatted)) $formatted = call_user_func($formatted, $model, $attr, $index, $this);
if (is_null($value)) $value = ArrayHelper::getValue($model, $attr);
switch ($this->colType($col)) {
case 'string':
break;
case 'number':
$value = (float) $value;
break;
case 'boolean':
$value = (boolean) $value;
break;
default: // 'date', 'dattime', 'timeofday'
if (! is_numeric($value)) $value = "'$value'";
$value = new JsExpression("new Date($value)");
break;
}
$r = [ 'v' => $value ];
if ($formatted) $r['f'] = $formatted;
return $r;
}
protected function colAttribute($col) {
return ArrayHelper::getValue($col, 'attribute');
}
protected function colType($col) {
return ArrayHelper::getValue($col, 'type', 'number');
}
protected static function encode($php) {
return empty($php) ? '{}': preg_replace('/\"(\w+)\":/', '$1:', Json::htmlEncode($php));
}
}