Insert embed image as Shortcode by WP Media

admin.js

// ### Convert an HTML-representation of an object to a string.
function myHTML() {
  // Save default function
  var defaultHTML = wp.html.string;
  // image intercept
  wp.html.string = function( options ) {
    // If image, send new function
    if( 'img' === options.tag ) {
      return shortcake.html( options );
    }
    // If image inside link, send new function
    if( 'a' === options.tag && 'img' === options.content.tag ) {
      return shortcake.html( options );
    }
    // Else returns default function
    return defaultHTML( options );
  }
}

var shortcake = shortcake || {};

// Convert Object of attr to String
shortcake.objToString = function( attrs ) {

  var attr_string = '';

  _.each( attrs, function( value, attr ) {

    // Fix Attr Name for href
    if( 'href' === attr )
      attr = 'url';

    attr_string += ' ' + attr;

    // Use empty attribute notation where possible.
    if ( '' === value ) {
      return;
    }

    // Convert boolean values to strings.
    if ( _.isBoolean( value ) ) {
      value = value ? 'true' : 'false';
    }

    attr_string += '="' + value + '"';
  });

  return attr_string;
}

// Create shortcode 
shortcake.html = function( options ) {
  var text = '[img',
      content = options.content || '';

  text += shortcake.objToString( options.attrs );

  if( _.isObject( content ) ) {
    text += shortcake.objToString( content.attrs );
  }


  return text + ']';
}

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