Habari\Post::comment_form PHP Method

    public function comment_form($context = 'public')
    {
        // Handle comment submissions and default commenter id values
        $cookie = 'comment_' . Options::get('public-GUID');
        $commenter_name = '';
        $commenter_email = '';
        $commenter_url = '';
        $commenter_content = '';
        $user = User::identify();
        if ($user->loggedin) {
            $commenter_name = $user->displayname;
            $commenter_email = $user->email;
            $commenter_url = Site::get_url('habari');
        } elseif (isset($_COOKIE[$cookie])) {
            // limit to 3 elements so a # in the URL stays appended
            $commenter = explode('#', $_COOKIE[$cookie], 3);
            // make sure there are always at least 3 elements
            $commenter = array_pad($commenter, 3, null);
            list($commenter_name, $commenter_email, $commenter_url) = $commenter;
        }
        // Now start the form.
        $form = new FormUI('comment-' . $context, 'comment');
        $form->add_class($context);
        $form->add_class('commentform');
        $form->set_wrap_each('<div>%s</div>');
        $form->set_setting('use_session_errors', true);
        // Enforce commenting rules
        if (Options::get('comments_disabled')) {
            $form->append(new FormControlStatic('message', _t('Comments are disabled site-wide.')));
            $form->class[] = 'comments_disabled';
            $form->set_properties(array('action' => '/'));
        } elseif ($this->info->comments_disabled) {
            $form->append(new FormControlStatic('message', _t('Comments for this post are disabled.')));
            $form->class[] = 'comments_disabled';
            $form->set_properties(array('action' => '/'));
        } elseif (Options::get('comments_require_logon') && !$user->loggedin) {
            $form->append(new FormControlStatic('message', _t('Commenting on this site requires authentication.')));
            $form->class[] = 'comments_require_logon';
            $form->set_properties(array('action' => '/'));
        } elseif (!$user->can('comment')) {
            $form->append(new FormControlStatic('message', _t('You do not have permission to comment on this site.')));
            $form->class[] = 'comments_require_permission';
            $form->set_properties(array('action' => '/'));
        } else {
            $form->set_properties(array('action' => URL::get('submit_feedback', array('id' => $this->id))));
            // Create the Name field
            $form->append(FormControlLabel::wrap(_t('Name <span class="required">*Required</span>'), FormControlText::create('cf_commenter', 'null:null', array('id' => 'comment_name', 'required' => 'required'))->add_validator('validate_required', _t('The Name field value is required'))));
            // Create the Email field
            $form->append($cf_email = FormControlText::create('cf_email', 'null:null', array('id' => 'comment_email', 'type' => 'email'))->add_validator('validate_email', _t('The Email field value must be a valid email address')));
            if (Options::get('comments_require_id') == 1) {
                $cf_email->add_validator('validate_required', _t('The Email field value must be a valid email address'));
                $cf_email->label(_t('Email <span class="required">*Required</span>'));
                $cf_email->set_property("required", "required");
            } else {
                $cf_email->label(_t('Email'));
            }
            $cf_email->set_value($commenter_email);
            // Create the URL field
            $form->append(FormControlLabel::wrap(_t('Website'), FormControlText::create('cf_url', 'null:null', array('id' => 'comment_url', 'type' => 'url')))->add_validator('validate_url', _t('The Website field value must be a valid URL')));
            $form->cf_url->value = $commenter_url;
            // Create the Comment field
            $form->append(FormControlTextArea::create('cf_content', 'null:null', array('id' => 'comment_content', 'required' => 'required'))->add_validator('validate_required', _t('The Comment field value is required'))->label(_t('Content')));
            $form->cf_content->value = $commenter_content;
            // Create the Submit button
            $form->append(FormControlSubmit::create('cf_submit')->set_properties(array('value' => _t('Submit'))));
            // Let plugins alter this form
            Plugins::act('form_comment', $form, $this, $context);
        }
        // Return the form object
        return $form;
    }