Add rel="canonical" entries for Glossary-, FAQ-, and News-, and Calendar Items

Allows to add individual

<link rel="canonical" href="...">

entries for pages that show glossary-, FAQ-, calendar, or news items (i.e. pages where the respective reader module is included).

Supported bundles

• Glossary "oveleon/contao-glossary-bundle with version constraint "^2.0".
• FAQ "contao/faq-bundle
• News "contao/news-bundle
• Calendar "contao/calendar-bundle.

Note

Not selecting an option for “rel="canonical" setzen"” or selecting the option “Nicht setzen” does not mean there will be no <link rel="canonical" ...> in the page. It just means, this bundle will not perform any action (and Contao will probably set the header value).

Roadmap

Make this bundle work with Contao 5.x.

Required work: switch from the legacy content elements and frontend modules to controllers.

As of now

• Glossary should be OK already
• FAQ "contao/faq-bundle still has contao/modules/ModuleFaqReader
• News "contao/news-bundle still has contao/modules/ModuleNewsReader
• Calendar "contao/calendar-bundle still has contao/modules/ModuleEventReader

so the bundle should work with Contao 5.x already. (TODO test it!).

References

• https://github.com/plenta/contao-rel-canonical-bundle Does more or less the same, but does not handle
  glossaray items (see https://github.com/oveleon/contao-glossary-bundle)