function rdf_preprocess_username

Implements MODULE_preprocess_HOOK().

File

modules/rdf/rdf.module, line 608

Code

function rdf_preprocess_username(&$variables) {
    // Because xml:lang is set on the HTML element that wraps the page, the
    // username inherits this language attribute. However, since the username
    // might not be transliterated to the same language that the content is in,
    // we do not want it to inherit the language attribute, so we set the
    // attribute to an empty string.
    if (empty($variables['attributes_array']['xml:lang'])) {
        $variables['attributes_array']['xml:lang'] = '';
    }
    // $variables['account'] is a pseudo account object, and as such, does not
    // contain the RDF mappings for the user. In the case of nodes and comments,
    // it contains the mappings for the node or comment object instead. However,
    // while the RDF mappings are available from a full user_load(), this should
    // be avoided for performance reasons. Since the type and bundle for users is
    // already known, call rdf_mapping_load() directly.
    $rdf_mapping = rdf_mapping_load('user', 'user');
    // The profile URI is used to identify the user account. The about attribute
    // is used to set the URI as the default subject of the predicates embedded
    // as RDFa in the child elements. Even if the user profile is not accessible
    // to the current user, we use its URI in order to identify the user in RDF.
    // We do not use this attribute for the anonymous user because we do not have
    // a user profile URI for it (only a homepage which cannot be used as user
    // profile in RDF.)
    if ($variables['uid'] > 0) {
        $variables['attributes_array']['about'] = url('user/' . $variables['uid']);
    }
    $attributes = array();
    // The typeof attribute specifies the RDF type(s) of this resource. They
    // are defined in the 'rdftype' property of the user RDF mapping.
    if (!empty($rdf_mapping['rdftype'])) {
        $attributes['typeof'] = $rdf_mapping['rdftype'];
    }
    // Annotate the username in RDFa. A property attribute is used with an empty
    // datatype attribute to ensure the username is parsed as a plain literal
    // in RDFa 1.0 and 1.1.
    if (!empty($rdf_mapping['name'])) {
        $attributes['property'] = $rdf_mapping['name']['predicates'];
        $attributes['datatype'] = '';
    }
    // Add the homepage RDFa markup if present.
    if (!empty($variables['homepage']) && !empty($rdf_mapping['homepage'])) {
        $attributes['rel'] = $rdf_mapping['homepage']['predicates'];
    }
    // The remaining attributes can have multiple values listed, with whitespace
    // separating the values in the RDFa attributes
    // (see http://www.w3.org/TR/rdfa-syntax/#rdfa-attributes).
    // Therefore, merge rather than override so as not to clobber values set by
    // earlier preprocess functions.
    $variables['attributes_array'] = array_merge_recursive($variables['attributes_array'], $attributes);
}