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<?php namespace RedeyeVentures\GeoPattern;
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use RedeyeVentures\GeoPattern\SVGElements\Group;
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use RedeyeVentures\GeoPattern\SVGElements\Polyline;
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use RedeyeVentures\GeoPattern\SVGElements\Rectangle;
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use RedeyeVentures\GeoPattern\SVGElements\Circle;
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use RedeyeVentures\GeoPattern\SVGElements\Path;
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class SVG {
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    protected $width;
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    protected $height;
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    protected $svgString;
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    function __construct($options=array())
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    {
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        $this->width = 100;
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        $this->height = 100;
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        $this->svgString = '';
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    }
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    public function setWidth($width)
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    {
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        $this->width = floor($width);
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        return $this;
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    }
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    public function setHeight($height)
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    {
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        $this->height = floor($height);
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        return $this;
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    }
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    protected function getSvgHeader()
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    {
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        return "<?xml version=\"1.0\"?><svg xmlns=\"http://www.w3.org/2000/svg\" width=\"{$this->width}\" height=\"{$this->height}\">";
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    }
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    protected function getSvgFooter()
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    {
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        return '</svg>';
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    }
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    public function addRectangle($x, $y, $width, $height, $args=array())
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    {
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        $rectangle = new Rectangle($x, $y, $width, $height, $args);
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        $this->svgString .= $rectangle;
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        return $this;
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    }
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    public function addCircle($cx, $cy, $r, $args=array())
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    {
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        $circle = new Circle($cx, $cy, $r, $args);
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        $this->svgString .= $circle;
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        return $this;
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    }
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    public function addPath($d, $args=array())
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    {
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        $path = new Path($d, $args);
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        $this->svgString .= $path;
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        return $this;
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    }
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    public function addPolyline($points, $args=array())
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    {
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        $polyline = new Polyline($points, $args);
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        $this->svgString .= $polyline;
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        return $this;
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    }
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    public function addGroup($group, $args=array())
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    {
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        if ($group instanceof Group)
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        {
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            $group->setArgs($args);
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            $this->svgString .= $group;
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            return $this;
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        }
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        throw new \InvalidArgumentException("The group provided is not a valid instance of Group.");
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    }
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    public function getString()
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    {
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        return $this->getSvgHeader().$this->svgString.$this->getSvgFooter();
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    }
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    public function __toString()
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    {
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        return $this->getString();
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    }
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}