From 25df6e6ed7e192fe85435f6127e357f481a385ca Mon Sep 17 00:00:00 2001
From: "Sven-S. Porst" <porst@sub.uni-goettingen.de>
Date: Mon, 1 Oct 2012 18:13:40 +0200
Subject: [PATCH] add support for a <metadata> container tag

so one can have a setup like

<metadata>
	<metadata name="language" brief="yes" merge="unique" termlist="yes"/>
	<metadata name="id" brief="yes"/>
	<metadata name="lccn" merge="unique"/>
</metadata>

The underlying desire is to be able to include the complete metadata setup with XInclude.
This requires us to have a single container with all elements.

This patch adjust the metadata element counting and evaluation to interpret both metadata tags on their own and containers with metadata tags in them.
Attributes of a metadata container tag are ignored.
---
 src/pazpar2_config.c |   44 ++++++++++++++++++++++++++++++++++++--------
 1 file changed, 36 insertions(+), 8 deletions(-)

diff --git a/src/pazpar2_config.c b/src/pazpar2_config.c
index a4503b7..da3d469 100644
--- a/src/pazpar2_config.c
+++ b/src/pazpar2_config.c
@@ -512,6 +512,18 @@ static int parse_metadata(struct conf_service *service, xmlNode *n,
     return 0;
 }
 
+
+static void service_add_metadata(xmlNode *n, int *num_metadata, int *num_sortkeys)
+{
+    (*num_metadata)++;
+
+    xmlChar *sortkey = xmlGetProp(n, (xmlChar *) "sortkey");
+    if (sortkey && strcmp((const char *) sortkey, "no"))
+        (*num_sortkeys)++;
+    xmlFree(sortkey);
+}
+
+
 static struct conf_service *service_create_static(struct conf_server *server,
                                                   xmlNode *node,
                                                   const char *service_id)
@@ -530,11 +542,18 @@ static struct conf_service *service_create_static(struct conf_server *server,
         if (n->type == XML_ELEMENT_NODE && !strcmp((const char *)
                                                    n->name, "metadata"))
         {
-            xmlChar *sortkey = xmlGetProp(n, (xmlChar *) "sortkey");
-            num_metadata++;
-            if (sortkey && strcmp((const char *) sortkey, "no"))
-                num_sortkeys++;
-            xmlFree(sortkey);
+            if (n->children) // This is a <metadata> container, look at its contents.
+            {
+                xmlNode *m;
+                for (m = n->children; m; m = m->next)
+                {
+                    if (m->type == XML_ELEMENT_NODE &&
+                            !strcmp((const char *) m->name, "metadata"))
+                        service_add_metadata(m, &num_metadata, &num_sortkeys);
+                }
+            }
+            else // This is a metadata-element proper, count it right away.
+                service_add_metadata(n, &num_metadata, &num_sortkeys);
         }
 
     service = service_init(server, num_metadata, num_sortkeys, service_id);
@@ -631,8 +650,17 @@ static struct conf_service *service_create_static(struct conf_server *server,
         }
         else if (!strcmp((const char *) n->name, (const char *) "metadata"))
         {
-            if (parse_metadata(service, n, &md_node, &sk_node))
-                return 0;
+            if (n->children) // This is a <metadata> container, look at its content.
+            {
+                xmlNode *m;
+                for (m = n->children; m; m = m->next)
+                    if ((!strcmp((const char *) m->name, (const char *) "metadata")))
+                        if (parse_metadata(service, m, &md_node, &sk_node))
+                            return 0;
+            }
+            else // This is a metadata-element proper, count it right away.
+                if (parse_metadata(service, n, &md_node, &sk_node))
+                    return 0;
         }
         else if (!strcmp((const char *) n->name, (const char *) "xslt"))
         {
@@ -683,7 +711,7 @@ static struct conf_service *service_create_static(struct conf_server *server,
                 if (!strcmp(rank_length, "linear"))
                     service->rank_length = 2;
                 else if (!strcmp(rank_length, "log"))
-                    service->rank_length = 1; 
+                    service->rank_length = 1;
                 else if (!strcmp(rank_length, "none"))
                     service->rank_length = 0;
                 else
-- 
1.7.10.4