Image-Shortcake: Fix 'media_send_to_editor' for WP Insert Media

image-shortcake-admin.js

function myTest() {

  // Save default function
  var defaultSend = wp.media.editor.send.attachment;

  // new send function
  wp.media.editor.send.attachment = function( props, attachment) {
    // If not image, return default function
    if ( 'image' !== attachment.type )
      return defaultSend( props, attachment)

    var caption = attachment.caption,
          options, html;

    // If captions are disabled, clear the caption.
    if ( ! wp.media.view.settings.captions ) {
      delete attachment.caption;
    }

    props = wp.media.string.props( props, attachment );
    
    options = {
      id:           attachment.id,
      post_content: attachment.description,
      post_excerpt: caption,
      linkto:       props.link
    };

    if ( props.linkUrl ) {
      options.url = props.linkUrl;
    }

    html = wp.media.string.image( props );

    // Add linkTo
    options.linkto = props.link;

    // Remove URL if Link not Custom
    if ( 'custom' !== options.linkto && options.url ) {
      delete options.url;
    }

    _.each(
      {
        align: 'align',
        size:  'image-size',
        alt:   'image_alt'
      }, function( option, prop ) {
        if ( props[ prop ] )
          options[ option ] = props[ prop ];
      }
    );

    return wp.media.post( 'send-attachment-to-editor', {
      nonce:      wp.media.view.settings.nonce.sendToEditor,
      attachment: options,
      html:       html,
      post_id:    wp.media.view.settings.post.id
    });
  };

};

jQuery(document).ready(function(){
  myTest();
});

Nice. Is there a way to do this without overriding this method, or this the only way to get a value for link?

When in the editor we click "Insert", the function returns an array of options. The code indicates that the options is defined here. You can find the option in the functions below, but the image data is transmitted to "attachment" at start function and not returns. It will need to receive data again.
The example uses the code change only for images. The original function is cached and transmitted as the main, if not the image file. This simplifies support