[snippet] All META tags inserted automatically

//<?
/**
| --------------------------------------------------------------------------
| Snippet Title:     MetaTagsExtra
| Snippet Version:   1.5 (final) modified by Soda
|
| Description:
|   Returns HTML for document dependant meta tags: Generator,
|   Description, Abstract, Author, Copyright, 
|   Robots, Googlebot, Cache-Control, Pragma, Expires and Last Modified
|
| Snippet Author:
|   Miels with mods by Lloyd Borrett ([email protected])
|      modified by Soda to add keywords, lang and MODx compliance
| Version History:
|   1.3 - Lloyd Borrett added the Robots meta tag based 
|   on the idea in the SearchableSE snippet by jaredc
|
|   1.4 - Lloyd Borrett added the Abstract meta tag
|   based on the Site Name and the Long Title.
|   Also added the Generator meta tag based on the MODx version details.
|   The Robots meta tag is now only output if the document is non-searchable,
|   to reduce HTML bloat. The Googlebot meta tag is now also output 
|   when the document is non-searchable.
|
|   1.5 - Lloyd Borrett added no-cache directives via the Cache-Control 
|   and Pragma meta tags if the document is non-cacheable.
|   Abstract meta tag uses the document description if long title not set.
|   Cleaned up some other tests. 
|   
|   Edited by Shane Briggs to refer to MODx rather than Etomite and 
|   removed the Get Keyword function as that is provided by MODx
|   natively as well as via the GetKeywords snippet
|
|
| Snippet Category:
|   Search Engines           
|
| Usage:
|   Insert [[MetaTags]] anywhere in the head section of your template.
|   Don't forget to set the full name of all document authors.
|   You can find it at "Manage users" -> your username -> "full name".
|   This value is used for the Author and Copyright meta tags.
|
|   When you mark a page as "NOT searchable" - a Robots meta tag 
|   with "noindex, nofollow" is inserted to keep web search engines
|   from indexing that document. After all, there's little value in 
|   making your MODx document unsearchable to MODx, when 
|   Google still knows where it is! For "searchable" documents, no
|   Robots meta tag is inserted. The default is "index, follow", so not
|   putting it in reduced HTML bloat.
|   A Googlebot meta tag with "noindex, nofollow, noarchive, nosnippet"
|   is also output, to tell Google to clean out its cache.
|
|   When you mark a page as "non cacheable", no-cache directives 
|   are inserted via the Cache-Control and Pragma meta tags.
| ---------------------------------------------------------------------------
| The keywords for the page must be empty else MODx display a <meta http-equiv="keywords"... />
| I use a TV for specific page keywords nammed [*keywords*] which contains comma separated list of keywords.
*/
$MetaKeywords ="";
// Keywords displayed on all pages
// default is the $all_page_keywords parameter, else uncomment the line of your choice:
// With a chunk:
// $all_page_keywords="{{AllPageKeywords}}"; 
// Defined here
// $all_page_keywords="keywords1, keywors2,...";

$comma=(isset($all_page_keywords))?', ':'';
// *** KEYWORDS ***
$MetaKeywords= " <meta name=\"keywords\" content=\"{$all_page_keywords}{$comma}[*keywords*]\" />\n";

$MetaLang ="";
$MetaGenerator = "";
$MetaDesc = "";
$MetaAbstract = "";
$MetaAuthor = "";
$MetaCopyright = "";
$MetaRobots = "";
$MetaGooglebot = "";
$MetaCache = "";
$MetaPragma = "";
$MetaExpires = "";
$MetaEditedOn = "";

// *** Language***
$MetaLang = " <meta http-equiv=\"Content-Type\" content=\"text/html; charset=[(etomite_charset)]\" />\n";

// *** GENERATOR ***
$version = $modx->getVersionData();
$MetaGenerator = " <meta name=\"version\" content=\"";
if(!$version['version'] == ""){
   $MetaGenerator .= "MODx ".$version['version'];
}
if(!$version['code_name'] == ""){
   $MetaGenerator .= " (".$version['code_name'].")";
}
$MetaGenerator .= "\" />\n";

// *** DESCRIPTION ***
$description = $modx->documentObject['description'];
if(!$description == ""){
   $MetaDesc = " <meta name=\"description\" content=\"$description\" />\n";
}
// *** ABSTRACT ***
// Use the Site Name and the documents Long Title (or Description)  
// to build an Abstract meta tag.
$sitename = $modx->config['site_name'];
$abstract = $modx->config['longtitle'];
if($abstract == ""){
   $abstract = $description;
}
if(!sitename == ""){
   $MetaAbstract = " <meta name=\"abstract\" content=\"".$sitename;
   if(!$abstract == ""){
      $MetaAbstract .= " - ".$abstract."\" />\n";
   } else {
      $MetaAbstract .= "\" />\n";
   }
} else {
   if(!$abstract == ""){
      $MetaAbstract = " <meta name=\"abstract\" content=\"";
      $MetaAbstract .= $abstract."\" />\n";
   }
}

// *** AUTHOR, COPYRIGHT, PUBLISHER and COMPANY ***
$authorid = $modx->documentObject['createdby'];
$createdon = date(Y,$modx->documentObject['createdon']);
$tbl = $modx->getFullTableName("user_attributes");
$query = "SELECT fullname FROM $tbl WHERE $tbl.id = $authorid"; 
$rs = $modx->dbQuery($query);
$limit = $modx->recordCount($rs); 
if($limit=1) {
  $resourceauthor = $modx->fetchRow($rs); 
  $authorname = $resourceauthor['fullname'];  
}
if (!$authorname == ""){
  $MetaAuthor = " <meta name=\"author\" content=\"$authorname\" />\n";
  $MetaCopyright = " <meta name=\"copyright\" content=\"Copyright (c) $createdon by $authorname. All rights reserved.\" />\n";
}

// *** ROBOTS and GOOGLEBOT ***
// Determine if this document has been set to non-searchable.
// As the default for the Robots and Googlebot Meta Tags are index and follow,
// these tags are only needed when we don't want the document searched. 
if(!$modx->documentObject['searchable']){
  $MetaRobots = " <meta name=\"robots\" content=\"noindex, nofollow\" />\n";
  $MetaGooglebot = " <meta name=\"googlebot\" content=\"noindex, nofollow, noarchive, nosnippet\" />\n";
}

// *** CACHE-CONTROL and PRAGMA ***
// Output no-cache directives via the Cache-Control and Pragma meta tags
// if this document is set to non-cacheable. 
$cacheable = $modx->documentObject['cacheable'];
if (!$cacheable) {
   $MetaCache = " <meta http-equiv=\"cache-control\" content=\"no-cache\" />\n";
   $MetaPragma = " <meta http-equiv=\"pragma\" content=\"no-cache\" />\n";
}

// *** EXPIRES ***
$unpubdate = date(r,$modx->documentObject['unpub_date']);
if($unpubdate > 0){
   $MetaExpires = " <meta http-equiv=\"expires\" content=\"$unpubdate\" />\n";
}

// *** LAST MODIFIED ***
$editedon = date(r,$modx->documentObject['editedon']);
$MetaEditedOn = " <meta http-equiv=\"last-modified\" content=\"$editedon\" />\n";

// *** RETURN RESULTS ***
// you can change the order of displayed items:
$output = $MetaLang.$MetaGenerator.$MetaKeywords.$MetaDesc.$MetaAbstract.$MetaAuthor.$MetaCopyright;
$output .= $MetaRobots.$MetaGooglebot.$MetaCache.$MetaPragma.$MetaExpires.$MetaEditedOn;

return $output;
//?>