Partial version of append_entry() method -- not yet working.

[irspy-moved-to-github.git] / lib / ZOOM / IRSpy / Record.pm

diff --git a/lib/ZOOM/IRSpy/Record.pm b/lib/ZOOM/IRSpy/Record.pm
index bded029..8a09c54 100644 (file)
--- a/lib/ZOOM/IRSpy/Record.pm
+++ b/lib/ZOOM/IRSpy/Record.pm
@@ -1,4 +1,4 @@
-# $Id: Record.pm,v 1.2 2006-06-20 12:36:14 mike Exp $
+# $Id: Record.pm,v 1.6 2006-07-21 16:50:20 mike Exp $
 
 package ZOOM::IRSpy::Record;
 
@@ -6,17 +6,21 @@ use 5.008;
 use strict;
 use warnings;
 
+use XML::LibXML;
+use XML::LibXML::XPathContext;
+
+
 =head1 NAME
 
 ZOOM::IRSpy::Record - record describing a target for IRSpy
 
 =head1 SYNOPSIS
 
- ### To follow
+ ## To follow
 
 =head1 DESCRIPTION
 
-I<### To follow>
+I<## To follow>
 
 =cut
 
@@ -24,14 +28,60 @@ sub new {
     my $class = shift();
     my($target, $zeerex) = @_;
 
-    ### Should compile the ZeeRex record into something useful.
+    if (!defined $zeerex) {
+       $zeerex = _empty_zeerex_record($target);
+    }
+
+    my $parser = new XML::LibXML();
     return bless {
        target => $target,
-       zeerex => $zeerex,
+       zeerex => $parser->parse_string($zeerex)->documentElement(),
     }, $class;
 }
 
 
+sub _empty_zeerex_record {
+    my($target) = @_;
+
+    ### Doesn't recognise SRU/SRW URLs
+    my($host, $port, $db) = ZOOM::IRSpy::_parse_target_string($target);
+
+    return <<__EOT__;
+<explain xmlns="http://explain.z3950.org/dtd/2.0/">
+ <serverInfo protocol="Z39.50" version="1995">
+  <host>$host</host>
+  <port>$port</port>
+  <database>$db</database>
+ </serverInfo>
+</explain>
+__EOT__
+}
+
+
+sub append_entry {
+    my $this = shift();
+    my($xpath, $frag) = @_;
+
+    print STDERR "this=$this, xpath='$xpath', frag='$frag'\n";
+    my $root = $this->{zeerex}; # XML::LibXML::Element ISA XML::LibXML::Node
+    print "Record='", $root->toString(), "'\n";
+    my $xc = XML::LibXML::XPathContext->new($root);
+    $xc->registerNs(zeerex => "http://explain.z3950.org/dtd/2.0/");
+    $xc->registerNs(irspy => "http://indexdata.com/irspy/1.0");
+
+    my @nodes = $xc->findnodes($xpath);
+    if (@nodes == 0) {
+       ZOOM::Log::log("irspy", "no matches for '$xpath': can't append");
+       return;
+    } elsif (@nodes > 1) {
+       ZOOM::Log::log("irspy", scalar(@nodes),
+                      " matches for '$xpath': using first");
+    }
+
+    print STDERR "zeerex='$root'\n";
+}
+
+
 =head1 SEE ALSO
 
 ZOOM::IRSpy