[cms] Allow specifying "robots" meta for pages [5.3.0-B1]

On website there are pages of 2 conceptual types:

pages that makes sense for robots (e.g. Google) to index (show in search results)
pages, that doesn't make to index (e.g. "No Permissions", "Form Submitted Template")

For later page category it makes sense to add following into <head>:

<meta name="robots" content="nofollow, noindex, noarchive"/>

Solution

html_head.elm.tpl

<inp2:m_if check="c.current_Field" name="MetaKeywords"><meta name="Keywords" content="<inp2:c.current_PageInfo name='MetaKeywords'/>"/></inp2:m_if>

/core/admin_templates/categories/ categories_edit.tpl

<div id="scroll_container">
   <table class="edit-form">
	
	.....

<inp2:m_RenderElement name="inp_edit_checkboxes" prefix="c" field="MetaNofollowNoindex" title="la_fld_MetaNofollowNoindex" />
 
	.....
 
    <!-- custom fields: begin -->
   <inp2:m_include t="incs/custom_blocks"/>
   <inp2:cf.general_PrintList render_as="cv_row_block" SourcePrefix="c" value_field="Value" per_page="-1" grid="Default" />
   <!-- custom fields: end -->

   <inp2:m_RenderElement name="inp_edit_filler"/>
</table>

sql

ALTER TABLE {TABLE_PREFIX}Categoies ADD `MetaNofollowNoindex` VARCHAR(30) NULL DEFAULT NULL;

/core/units/categories/categories_config.php

'Fields' => Array (

	.....

'MetaNofollowNoindex' => Array (
	'type' => 'string',
	'formatter' => 'kOptionsFormatter', 'options' => Array ('nofollow' => 'NoFollow', 'noindex' => 'NoIndex', 'noarchive' => 'NoArchive', 'noimageindex' => 'NoImageIndex', 'noodp' => 'NoOdp',  'nosnippet' => 'NoSnippet'),
 	'default' => NULL
),
	.....
),

/core/units/categories/categories_tag_processor.php

function PageInfo($params){
 $page =& $this->_getPage($params);

 switch ($params['type']) {

	.....

 case 'meta_nofollownoindex':
 $db_field = 'MetaNofollowNoindex';
 break;

	.....

 default:
 return '';
 }

 $default = isset($params['default']) ? $params['default'] : '';
 $val = $page->GetField($db_field);

 if ($db_field == 'MetaNofollowNoindex') {
 return str_replace('|',', ',trim($val,'|'));
 }
		.....

 return $val;
}