This package is a part of the Plone's collective.fg bundle. It adds the opengraph metadata to your HTML head section.

Supported metadata:

• og:site_name name of the site
• og:url url of the webpage
• og:title title of the webpage
• og:description description of the webpage
• og:image your webpage image (either 'image' field of your context or collective.contentleadimage one)

from the control panel you can manage following settings: - the default og:type - which content types should be opengraph metadata aware

One of the goals of this package is to allow developers extend the default metadata definition. It's availabe through the IOpengrapMetatags adapter:

from collective.opengraph.interfaces IOpengraphMetatags
from collective.opengraph.viewlets import ATMetatags

    class MyATMetatags(ATMetatags):

    implements(IOpengrapMetatags)

    @property
    def metatags(self):
    tags = super(MyATMetatags, self).metatags
            tags.update({'og:newtype': 'custom value'})
            return tags

You can also customize existing og values:

from collective.opengraph.interfaces IOpengraphMetatags
from collective.opengraph.viewlets import ATMetatags

    class AnotherMetatags(ATMetatags):

    implements(IOpengrapMetatags)

    @property
        def title(self):
            return '%s - Lorem ipsum' % self.context.Title()

Once your class is declared (let's say in a viewlets.py file), add the following adapter tag within your overrides.zcml file:

<adapter 
    for="Products.ATContentTypes.interface.interfaces.IATContentType"
    factory=".viewlets.MyATMetatags"
    provides="collective.opengraph.interfaces.IOpengraphMetatags"
   />