Saturday, April 15, 2017

how to include custom meta tag headers from AEM Tags

how to include custom meta tag headers from AEM Tags

This post explains the approach to include custom meta tag headers from AEM/CQ5 Tags.

Customize the page properties dialog:

Customize the page properties dialog to add the field to select custom tags

Copy /libs/foundation/components/page/dialog and /libs/foundation/components/page/tab_basic under custom page rendering component e.g. /apps/training/components/page-content/

Create a node of type cq:widget under tab_basic with the following properties

Name Type Value
allowBlank Boolean true
fieldLabel String Page Type
name String ./page-type
namespaces String[] page-type
xtype String tags

Refer https://www.albinsblog.com/2017/03/how-to-customize-page-properties-dialog-dynamic-dropdownlist-aem-cq5-in-touchui-classicui.html for more details on customizing the page properties dialog.


Define new tag namespace & tags:
Create new tag namespace(page-type) through http://localhost:4502/tagging


Create required tags under page-type namespace



Override the the head.jsp if the page component is inhering from foundation/components/page. Add required logic in head.jsp to include the custom metatags from AEM tags.
e.g.
<%
%><%@ include file="/libs/foundation/global.jsp"%><%
%><%@ page contentType="text/html; charset=utf-8" import="com.albinsblog.samples.core.TagsUtil,com.day.cq.tagging.*"%><%

TagManager tagManager = resourceResolver.adaptTo(TagManager.class);
String[] pageTypeTags = properties.get("./page-type", String[].class);
String pageTypes = TagsUtil.getTagTitles(tagManager, pageTypeTags);
%><head>
 <cq:include script="/libs/wcm/core/components/init/init.jsp"/>
   <meta name="page-types" content="<%= pageTypes %>" />
</head>

TagsUtil.java - util class to fetch the tag titles and convert the titles to required formats.

import com.day.cq.tagging.Tag;
import com.day.cq.tagging.TagManager;
public class TagsUtil {
public static String getTagTitles(TagManager tagManager, String[] typeTags) {
StringBuffer typeBuffer = new StringBuffer();
if (typeTags != null) {
for (String typeTagId : typeTags) {
Tag typeTag = tagManager.resolve(typeTagId);
if (typeTag != null) {
String tagPath = typeTag.getTitlePath();
String[] splitTags = tagPath.split(":");
String tagName = splitTags[1];
if (typeTag != null)
typeBuffer.append(tagName + ";"); }
}
if (typeBuffer.length() != 0)
typeBuffer.deleteCharAt(typeBuffer.length() - 1);
}
return typeBuffer.toString();
}
}
Configure required tags in page properties dialog

The defined meta tag will be added to the page 



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