open-graph.vm

## Derived from "Open Graph och Twitter Cards för SiteVision" Limepark AB 

##
## MIT License
## 
## 
## Copyright © 2022 rek.ai

## Settings

#set ($titleOrder = ['OG.Title', 'SV.Title'])
#set ($renderTitleMeta = true)

#set ($preambleOrder = ['OG.Description', 'SV.Description', 'summary'])
#set ($renderPreambleMeta = true)
#set ($renderPreambleAsDescription = false)
#set ($maxPreambleLength = 600)

#set ($imageOrder = ['OG.Image', 'SV.Image'])
#set ($renderImageMeta = true)

## UPDATE THIS VALUE
#set ($imageFallbackUrl = '')
#set ($imageFallbackWidth = '200')
#set ($imageFallbackHeight = '200')

## End of settings

#set ($utils = $request.getAttribute('sitevision.utils'))
#set ($nodeTreeUtil = $utils.nodeTreeUtil)
#set ($propertyUtil = $utils.propertyUtil)
#set ($currentPage = $utils.portletContextUtil.currentPage)
#set ($endecUtil  = $utils.endecUtil)

#set ($imageUrl = '')
#set ($preambleText = '')
#set ($titleText = '')
#set ($imageWidth = '')
#set ($imageHeight = '')
#set ($imageMimeType = '')

#if ($renderImageMeta)
   #foreach ($meta in $imageOrder)
      #if ($imageUrl == '')
         #set ($imageNode = $propertyUtil.getNode($currentPage, $meta))
         #if ($imageNode)
            #set ($imageWidth = $propertyUtil.getInt($imageNode, 'width', 0))
            #set ($imageHeight = $propertyUtil.getInt($imageNode, 'height', 0))
            #set ($imageMimeType = $propertyUtil.getStringEscaped($imageNode, 'mimeType', ''))

            #if ($imageWidth >= 200 && $imageHeight >= 200)
               #set ($imageUrl = $propertyUtil.getString($imageNode, 'URL', ''))
            #end
         #end
      #end
   #end

   #if ($imageUrl == '')
      #if ($imageFallbackUrl != '')
         #if ($imageFallbackUrl.substring(0, 1) == '/')
            #set ($sitePageUrl = $propertyUtil.getString($utils.resourceLocatorUtil.sitePage, 'URL'))
            #set ($sitePageUri = $propertyUtil.getString($utils.resourceLocatorUtil.sitePage, 'URI'))
            #set ($dollar = '$')

            #set ($imageFallbackUrl = $sitePageUrl.replaceAll("$!{sitePageUri}$!{dollar}", '') + $imageFallbackUrl)
         #end

         #set ($imageUrl = $imageFallbackUrl)
         #set ($imageWidth = $imageFallbackWidth)
         #set ($imageHeight = $imageFallbackHeight)
      #end
   #end

   #if ($imageUrl != '')
      <meta property="og:image" content="$!imageUrl" />

      #if ($imageWidth)
         <meta property="og:image:width" content="$!imageWidth" />
      #end

      #if ($imageHeight)
         <meta property="og:image:height" content="$!imageHeight" />
      #end

      #if ($imageMimeType != "")
         <meta property="og:image:type" content="$!imageMimeType" />
      #end
   #end
#end

#if ($renderPreambleMeta)
   #foreach ($meta in $preambleOrder)
      #if ($preambleText == '')
         #set ($preambleText = $propertyUtil.getString($currentPage, $meta, ''))
      #end
   #end
   #set ($preambleText = $preambleText.trim())
   #if ($maxPreambleLength > 0 && $preambleText.length() > $maxPreambleLength)
      #set ( $preambleText = $preambleText.substring(0, $maxPreambleLength) + '...')
   #end

   #if ($preambleText != '')
      #set ($preambleText = $endecUtil.escapeXML($preambleText))
      <meta property="og:description" content="$!preambleText" />

      #if ($renderPreambleAsDescription)
         <meta name="description" content="$!preambleText" />
      #end
   #end
#end

#if ($renderTitleMeta)
   #foreach ($meta in $titleOrder)
      #if ($titleText == '')
         #set ($titleText = $propertyUtil.getStringEscaped($currentPage, $meta, ''))
      #end
   #end
   #set ($titleText = $titleText.trim())

   #if ($titleText != '')
      <meta property="og:title" content="$!titleText" />
   #end
#end

<meta name="twitter:card" content="summary" />
<meta property="og:url" content="$propertyUtil.getString($currentPage, 'URL', '')" />

For keywords:
<meta name="keywords" content="$propertyUtil.getString($currentPage, 'searchKeywords', '')" />