[%#

=head1 MACROS

These are some default macros which are used by various templates in the
system.

=head2 link

This creates an <A HREF="..."> to a command in the Apache::MVC system by
catenating the base URL, table, command, and any arguments.

#%]
[%
MACRO link(table, command, additional, label) BLOCK;
    SET lnk = base _ "/" _ table _ "/" _ command _ "/" _ additional;
    lnk = lnk | uri | html;
    '<a href="' _ lnk _ '">';
    label | html;
    "</a>";
END;
%]

[%#

=head2 maybe_link_view

C<maybe_link_view> takes something returned from the database - either
some ordinary data, or an object in a related class expanded by a
has-a relationship. If it is an object, it constructs a link to the view
command for that object. Otherwise, it just displays the data.

#%]

[%
MACRO maybe_link_view(object) BLOCK;
    IF object.isa('Maypole::Model::Base');
        link(object.table, "view", object.id.join('/'), object);
    ELSE;
        object | html ;
    END;
END;
%]

[%#

=head2 display_line

C<display_line> is used in the list template to display a row from the
database, by iterating over the columns and displaying the data for each
column. It misses out the C<id> column by default, and magically
URLifies columns called C<url>. This may be considered too much magic
for some.

#%]
[% MACRO display_line(item) BLOCK;
    FOR col = classmetadata.list_columns;
	NEXT IF col == "id" OR col == classmetadata.table _ "_id";
	col_obj = item.find_column(col);
        "<td>";
        IF col == "url" AND item.url;
            '<a href="'; item.url | html ; '"> '; item.url; '</a>';
        ELSIF col == classmetadata.stringify_column;
            maybe_link_view(item);
 		ELSIF col_obj; # its a real column
            accessor = item.accessor_name_for(col_obj) ||
			           item.accessor_name(col_obj); # deprecated in cdbi
            maybe_link_view(item.$accessor);
        ELSE; 
            item.$col;
        END;

        "</td>";
    END;
    '<td class="actions">';
    button(item, "edit");
    button(item, "delete");
    "</td>";
END %]
[%#

=head2 button

This is a generic button, which performs an action on an object.

=cut

#%]
[% MACRO button(obj, action) BLOCK; %]
[% IF obj.is_public(action) %]
<form class="actionform" action="[% base %]/[% obj.table %]/[% action %]/[% obj.id.join('/') %]" method="post">
<div class="field"><input class="actionbutton" type="submit" value="[% action %]" /></div></form>
[% END %]
[% END %]
[%#

=head2 view_related

This takes an object, and looks up the C<related_accessors>; this should
give a list of accessors that can be called to get a list of related
objects. It then displays a title for that accessor, (i.e. "Beers" for a
brewery) calls the accesor, and displays a list of the results. 

=cut

#%]
[% 
MACRO view_related(object) BLOCK;
    FOR accessor = classmetadata.related_accessors.list;
        "<div id=\"subtitle\">"; accessor | ucfirst; "</div>\n";
        "<ul id=\"vlist\">";
        FOR thing = object.$accessor;
            "<li>"; maybe_link_view(thing); "</li>\n";
        END;
        "</ul>";
    END; 
END;

MACRO test_xxxx(myblock) BLOCK;
    FOR col = classmetadata.columns;
        NEXT IF col == "id";
        myblock;
    END;
END;
%]
[%#

=head2 view_item

This takes an object and and displays its properties in a table. 

=cut

#%]
[% MACRO view_item(item) BLOCK; %]
    [% SET string = classmetadata.stringify_column %]
    <div id="title"> [% item.$string | html %]</div>
    [% INCLUDE navbar %]
    <table class="view">
        <tr>
            <td class="field">[% classmetadata.colnames.$string  %]</td>
            <td>[% item.$string | html %]</td>
        </tr>
        [% FOR col = classmetadata.columns.list;
            NEXT IF col == "id" OR col == string OR col == classmetadata.table _ "_id";;
            NEXT UNLESS item.$col;
        %]
[%# 

=for doc

It gets the displayable form of a column's name from the hash returned
from the C<column_names> method:

#%]
            <tr>
                <td class="field">[% classmetadata.colnames.$col || 
                     col | ucfirst | replace('_',' '); %]</td>
                <td>
                    [% IF col == "url" && item.url;  # Possibly too much magic.
                        '<a href="'; item.url | html ; '"> '; item.url; '</a>';
					ELSIF item.$col.size > 1; # has_many column
						FOR thing IN item.$col; 
							maybe_link_view(thing);",  ";
						 END;

                    ELSE;
                        maybe_link_view(item.$col); 
                    END; %]
[%#

This tests whether or not the returned value is an object, and if so,
creates a link to a page viewing that object; if not, it just displays
the text as normal. The object is linked using its stringified name;
by default this calls the C<name> method, or returns the object's ID
if there is no C<name> method or other stringification method defined.

=cut

#%] 
                </td>
            </tr>
        [% END; %]
    </table>
[% END %]