tinyMCE editor not updating on the fly

I have a HTML form with tinyMCE editor in it the form has an image upload option with a button which on click sends the file to ajax which then posts the value to the controller and uploads the image, I am good till here and everything is working. What I want is once the image has been uploaded it should be appended to the editor which is not happening. My javascript:

$('#uploadImageOnTheFly').click(function()
{
var photo = document.getElementById('photo');

var formData = new FormData();

formData.append('photo', photo.files[0], photo.value);

var editorvalue = $('#textbody').val();
$.ajax({
    type: 'POST',
    url: '/admin/uploadPhotoForTemplate',
    data: formData,
    contentType: false,
    processData: false,
    success: function (data) {
        var parsed = JSON.parse(data);
        if(parsed.status === 'success')
        {
            var body = $('#textbody');
            html = '<img src="' +parsed.url +'">';
            body.prepend(html);
        }
    }
});
});

My HTML form :

<div class="form-wrap">
    <div class="panel panel-body">
        <form method="POST" action="http://ift.tt/1Mzqf8j" accept-charset="UTF-8"><input name="_token" type="hidden" value="vsKR2MtkUxpTI7ku97Hsknz8RurV4ioQeJLkA9NP">
        <div class="form-group">
            <label for="name">Name</label>
            <input class="form-control" name="name" type="text" value="Alibaba edited" id="name">
        </div>
        <div class="form-group">
            <label for="email">Email</label>
            <input class="form-control" name="email" type="text" value="contact@alibaba.com" id="email">
        </div>

        <div class="form-group">
            <label for="subject">Subject</label>
            <input class="form-control" name="subject" type="text" value="Testing" id="subject">
        </div>

        <div class="form-group">
            <div class="input-group">
                <input type="file" id="photo">
                <span class="input-group-btn">
                    <button type="button" id="uploadImageOnTheFly" class="btn btn-info">Upload</button>
                    </span>
            </div>
        </div>

        <textarea style="min-height: 400px;" name="body" id="textbody">Data fetched from database goes here ...</textarea>
        <br/>

        <div class="form-group">
            <input type="submit" value="Save" class="btn btn-success">
            <button type="button" class="btn btn-danger">Cancel</button>
        </div>
        </form>
    </div>
</div>

and my laravel controller :

public function upload()
{
    if(Input::hasFile('photo'))
    {
        $allowedext = ["png", "jpg", "jpeg", "gif"];
        $photo = Input::file('photo');
        $destinationPath = public_path() . '/uploads/templates';
        $filename = str_random(12);
        $extension = $photo->getClientOriginalExtension();
        if(in_array($extension, $allowedext))
        {
            Input::file('photo')->move($destinationPath, $filename . '.' . $extension);
        } else
        {
            return json_encode('File format not supported');
        }

        return json_encode(['status' => 'success', 'url' => '/uploads/templates/' . $filename . '.' . $extension]);
    } else
    {
        return json_encode(['status' => 'failure']);
    }
}

EDIT tinyMCE calling script

<script type="text/javascript" src="/tinymce/tinymce.min.js"></script>

<script type="text/javascript">
tinymce.init({
    selector: "textarea",
    plugins: [
        "advlist autolink autosave link image lists charmap print preview hr anchor pagebreak spellchecker",
        "searchreplace wordcount visualblocks visualchars code fullscreen insertdatetime media nonbreaking",
        "table contextmenu directionality emoticons template textcolor paste fullpage textcolor"
    ],

    toolbar1: "newdocument fullpage | bold italic underline strikethrough | alignleft aligncenter alignright alignjustify | styleselect formatselect fontselect fontsizeselect",
    toolbar2: "cut copy paste | searchreplace | bullist numlist | outdent indent blockquote | undo redo | link unlink anchor image media code | inserttime preview | forecolor backcolor",
    toolbar3: "table | hr removeformat | subscript superscript | charmap emoticons | print fullscreen | ltr rtl | spellchecker | visualchars visualblocks nonbreaking template pagebreak restoredraft",

    menubar: false,
    toolbar_items_size: 'small',

    style_formats: [
        {title: 'Bold text', inline: 'b'},
        {title: 'Red text', inline: 'span', styles: {color: '#ff0000'}},
        {title: 'Red header', block: 'h1', styles: {color: '#ff0000'}},
        {title: 'Example 1', inline: 'span', classes: 'example1'},
        {title: 'Example 2', inline: 'span', classes: 'example2'},
        {title: 'Table styles'},
        {title: 'Table row 1', selector: 'tr', classes: 'tablerow1'}
    ],

    templates: [
        {title: 'Test template 1', content: 'Test 1'},
        {title: 'Test template 2', content: 'Test 2'}
    ]
});</script>

Most probably the problem is between line 18-23 in javascript

via Chebli Mohamed