Improve the list of supported content types that the linkintegrity plugin will reference

[neilferreira]

Currently only links within RichText fields are being added as references.

I've currently got an updated method used in a project which could be a good starting point:

    def build_deps(referenced_content, value):
        logger = logging.getLogger(__name__)
        if not value:
            return
        if (isinstance(value, bool) or isinstance(value, int) or
           isinstance(value, NamedBlobFile) or isinstance(value, date) or
           isinstance(value, NamedFile)):
            # We can't do anything with these
            return
        elif (isinstance(value, RichTextValue) or isinstance(value, str) or
              isinstance(value, unicode)):
            if isinstance(value, RichTextValue):
                value = value.raw
            links = extractLinks(value)
            for content in getObjectsFromLinks(obj, links):
                referenced_content.append(getattr(content, 'context', content))
        elif isinstance(value, Structure):
            if value.hasContentObject:
                referenced_content.append(value.getContentObject())
        elif isinstance(value, dict):
            for key in value:
                build_deps(referenced_content, value[key])
        elif isinstance(value, list) or isinstance(value, set) or isinstance(value, tuple):
            for row in value:
                build_deps(referenced_content, row)
        elif isinstance(value, RelationValue):
            referenced_content.append(value.to_object)
        else:
            logger.error('Could not do anything with %s (type %s)' % (value, type(value)))

The "Structure" object is a custom widget type that we've created, ideally we could just check for a 'content object' on a specific attribute so support for this can be implemented by anyone wanting their custom schema types to include referenced content.

[jensens]

idea: use named adapters, register an adapter for each case, iterate over all adapters and let them do their work. so its easy to provide a custom adapter with an custom widget.