NAME

       AnyEvent::XMPP::Ext::DataForm - XEP-0004 DataForm

SYNOPSIS

DESCRIPTION

       This module represents a Data Form as specified in XEP-0004.

METHODS

       new (%args)
       append_field ($field)
           This method appends a field to the form.  $field must have the structure as described
           in "FIELD STRUCTURE" below.

       from_node ($node)
           This method interprets the AnyEvent::XMPP::Node object in $node as data form XML node
           and reads out the fields and all associated information.

           ($node must be the XML node of the <x xmlns='jabber:x:data'> tag).

       make_answer_form ($request_form)
           This method initializes this form with default answers and other neccessary fields
           from $request_form, which must be of type AnyEvent::XMPP::Ext::DataForm or compatible.

           The result will be a form with a copy of all fields which are not of type "fixed". The
           fields will also have the default value copied over.

           The form type will be set to "submit".

           The idea is: this creates a template answer form from $request_form.

           To strip out the unneccessary fields later you don't need call the
           "clear_empty_fields" method.

       clear_empty_fields
           This method removes all fields that have no values and options.

       remove_field ($field_or_var)
           This method removes a field either by it's unique name or by reference. $field_or_var
           can either be the unique name or the actual field hash reference you get from
           "get_field" or "get_fields".

       set_form_type ($type)
           This method sets the type of the form, which must be one of:

              form, submit, cancel, result

       form_type
           This method returns the type of the form, which is one of the options described in
           "set_form_type" above or undef if no type was yet set.

       get_reported_fields
           If this is a search result this method returns more than one element here. The
           returned list consists of fields as described in "FIELD STRUCTURE", only that they
           lack values and options.

           See also the "get_items" method.

       get_items
           If this form is a search result this method returns the list of items of that search.

           An item is a array ref of fields (field structure is described in "FIELD STRUCTURE").
           This method returns a list of items.

       get_fields
           This method returns a list of fields. Each field has the structure as described in
           "FIELD STRUCTURE".

       get_field ($var)
           Returns the field with the unique field name $var or undef if no such field is in this
           form.

       set_field_value ($var, $value)
           This method sets the value of the field with the unique name $var.  If the field has
           supports multiple values all values will be removed and only $value will be added, if
           $value is undefined the field's value will be deleted.

       add_field_value ($var, $value)
           This method adds the $value to the field with the unique name $var.  If the field
           doesn't support multiple values this method has the same effect as "set_field_value".

       to_simxml
           This method converts the form to a data strcuture that you can pass as "node" argument
           to the "simxml" function which is documented in AnyEvent::XMPP::Util.

           Example call might be:

              my $node = $form->to_simxml;
              simxml ($w, defns => $node->{ns}, node => $node);

           NOTE: The returned simxml node has the "dns" field set so that no prefixes are
           generated for the namespace it is in.

       as_debug_string
           This method returns a string that represents the form.  Only for debugging purposes.

FIELD STRUCTURE

          {
             label    => 'field label',
             type     => 'field type',
             var      => '(unique) field name'
             required => true or false value,
             values   => [
                'value text',
                ...
             ],
             options  => [
                ['option label', 'option text'],
                ...
             ]
          }

       For the semantics of all fields please consult XEP 0004.

SEE ALSO

          XEP 0004

AUTHOR

       Robin Redeker, "<elmex at ta-sa.org>", JID: "<elmex at jabber.org>"

COPYRIGHT & LICENSE

       Copyright 2007, 2008 Robin Redeker, all rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.