LNXSDK/leenkx/Sources/leenkx/logicnode/GetBlobUrlNode.hx

package leenkx.logicnode;


class GetBlobUrlNode extends LogicNode {
    public var value: Dynamic;
    public var property0: String;
    public function new(tree:LogicTree) {
        super(tree);
    }

   public function canvasToBlob(canvas : Dynamic) : js.html.Blob{
        //No toBlob from Google so followed the help here - https://code.google.com/p/chromium/issues/detail?id=67587
        var extractPattern = ~/data:([^;]*)(;base64)?,([0-9A-Za-z+\/]+)/;
        extractPattern.match(canvas.toDataURL());
        //assume base64 encoding
        var binStr = js.Browser.window.atob(extractPattern.matched(3));
        //convert to binary in ArrayBuffer
        var buf = new js.lib.ArrayBuffer(binStr.length);
        var view = new js.lib.Uint8Array(buf);
        for(i in 0...view.length){
            view[i] = binStr.charCodeAt(i);
        }
        var blob = new js.html.Blob([view], {type: extractPattern.matched(1)});
        return blob;
    }

    public function videoToDataUrl(video: Dynamic){

        var canvas:js.html.CanvasElement = new js.html.CanvasElement();
        var ctx = canvas.getContext('2d');

        ctx.drawImage(video, 0, 0);

    }


    override function get(from: Int): Dynamic {
        return switch (property0) {
            case 'file': 
                var data: Dynamic = inputs[0].get();
                data.getBlobURL(function(err, url) {
                  value = url;
                });     
                value;
            case 'object': 
                var data: Dynamic = inputs[0].get();
                value = js.html.URL.createObjectURL(data);          
                value;
            case 'canvas': 
                var data: Dynamic = inputs[0].get();
                var blob = canvasToBlob(data);
                value = js.html.URL.createObjectURL(blob);  
                trace(value);
                value;
            case 'video': 
                var video: js.html.VideoElement = inputs[0].get();
                var canvas: js.html.CanvasElement = cast js.Browser.document.createElement('canvas');
                canvas.width = video.width;
                canvas.height = video.height;
                var ctx    = canvas.getContext('2d');
                ctx.drawImage(video, 0, 0);
                canvas.toDataURL();
          default: 
                var data: Dynamic = inputs[0].get();
                value = js.html.URL.createObjectURL(data);          
                value;
        }
    }

}