Is there a way to provide the login provision for anonymous user when anonymous commenting is enabled?

Question

I have enabled provision for Anonymous commenting. But it provides the only option of

1. Your Name
2. Email Address
3. Homepage

What I would like is, above this, there should be a provision of Login. Hence this way user can see that, So he/she will have two options, either he/she can login OR he/she can comment anonymously.

What happen with current system is, Anonymous user keep on commenting as anonymous only, If there is a option of Login, then he may think about that.

So, I would like to make the system in commenting like,

Add Comment

**Login/create account**

OR

**Comment Anonymously**

Your-name*  |  Email*  |  Homepage 

Comment field

Update:

I just need a Link, like what appears above the comments title on every drupal site, as shown in following image, Log in or register to post comment

Image

Answer 1

Since you want to edit something in the contact form, you can use the same hook_form_FORM_ID_alter of my previous answer to alter the comment_form.

As you can see in the comment form all author details are in an array $form['author']. So you need to add an item to this array and move it to the top.

function MODULENAME_form_comment_form_alter(&$form, &$form_state, $form_id) {
  // Any code you already have here

  // Check if the user was not yet logged in. (It would be useless to show this otherwise.)
  if (!user_is_logged_in()) {

    $form['author']['login_url'] = array(
      '#type' => 'markup',
      '#markup' => t('<a href="@login">Login</a> or <a href="@create">create account</a>', array('@login' => url('user/login'), '@create' => url('user/register'))),
      '#weight' => -10, // Play with this value to control the height.
    );
  }
}