+static const char *get_mergekey(xmlDoc *doc, struct client *cl, int record_no,
+ struct conf_service *service, NMEM nmem)
+{
+ char *mergekey_norm = 0;
+ xmlNode *root = xmlDocGetRootElement(doc);
+ WRBUF norm_wr = wrbuf_alloc();
+ xmlNode *n;
+
+ /* consider mergekey from XSL first */
+ xmlChar *mergekey = xmlGetProp(root, (xmlChar *) "mergekey");
+ if (mergekey)
+ {
+ const char *norm_str;
+ pp2_relevance_token_t prt =
+ pp2_relevance_tokenize(
+ service->mergekey_pct,
+ (const char *) mergekey);
+
+ while ((norm_str = pp2_relevance_token_next(prt)))
+ {
+ if (*norm_str)
+ {
+ if (wrbuf_len(norm_wr))
+ wrbuf_puts(norm_wr, " ");
+ wrbuf_puts(norm_wr, norm_str);
+ }
+ }
+ pp2_relevance_token_destroy(prt);
+ xmlFree(mergekey);
+ }
+ else
+ {
+ /* no mergekey defined in XSL. Look for mergekey metadata instead */
+ for (n = root->children; n; n = n->next)
+ {
+ if (n->type != XML_ELEMENT_NODE)
+ continue;
+ if (!strcmp((const char *) n->name, "metadata"))
+ {
+ struct conf_metadata *ser_md = 0;
+ int md_field_id = -1;
+
+ xmlChar *type = xmlGetProp(n, (xmlChar *) "type");
+
+ if (!type)
+ continue;
+
+ md_field_id
+ = conf_service_metadata_field_id(service,
+ (const char *) type);
+ if (md_field_id >= 0)
+ {
+ ser_md = &service->metadata[md_field_id];
+ if (ser_md->mergekey == Metadata_mergekey_yes)
+ {
+ xmlChar *value = xmlNodeListGetString(doc, n->children, 1);
+ if (value)
+ {
+ const char *norm_str;
+ pp2_relevance_token_t prt =
+ pp2_relevance_tokenize(
+ service->mergekey_pct,
+ (const char *) value);
+
+ while ((norm_str = pp2_relevance_token_next(prt)))
+ {
+ if (*norm_str)
+ {
+ if (wrbuf_len(norm_wr))
+ wrbuf_puts(norm_wr, " ");
+ wrbuf_puts(norm_wr, norm_str);
+ }
+ }
+ xmlFree(value);
+ pp2_relevance_token_destroy(prt);
+ }
+ }
+ }
+ xmlFree(type);
+ }
+ }
+ }
+
+ /* generate unique key if none is not generated already or is empty */
+ if (wrbuf_len(norm_wr) == 0)
+ {
+ wrbuf_printf(norm_wr, "%s-%d",
+ client_get_database(cl)->database->url, record_no);
+ }
+ if (wrbuf_len(norm_wr) > 0)
+ mergekey_norm = nmem_strdup(nmem, wrbuf_cstr(norm_wr));
+ wrbuf_destroy(norm_wr);
+ return mergekey_norm;
+}
+
+static const char *str_tok_n(const char *s, const char *delim,
+ const char **res, size_t *len)
+{
+ *res = s;
+ while (*s && !strchr(delim, *s))
+ s++;
+ *len = s - *res;
+ if (*len == 0)
+ return 0;
+ if (*s && strchr(delim, *s))
+ s++;
+ return s;
+}
+
+/** \brief see if metadata for pz:recordfilter exists
+ \param root xml root element of normalized record
+ \param sdb session database for client
+ \retval 0 if there is no metadata for pz:recordfilter
+ \retval 1 if there is metadata for pz:recordfilter
+
+ If there is no pz:recordfilter defined, this function returns 1
+ as well.
+*/
+
+static int check_record_filter(xmlNode *root, struct session_database *sdb)
+{
+ int match = 0;
+ xmlNode *n;
+ const char *s;
+ s = session_setting_oneval(sdb, PZ_RECORDFILTER);
+
+ if (!s || !*s)
+ return 1;
+
+ for (n = root->children; n; n = n->next)
+ {
+ if (n->type != XML_ELEMENT_NODE)
+ continue;
+ if (!strcmp((const char *) n->name, "metadata"))
+ {
+ xmlChar *type = xmlGetProp(n, (xmlChar *) "type");
+ if (type)
+ {
+ const char *s1 = s;
+ size_t len;
+ const char *value;
+ while ((s1 = str_tok_n(s1, ",", &value, &len)) != 0)
+ {
+ if (len == strlen((const char *)type) &&
+ !memcmp((const char *) type, s, len))
+ {
+ xmlChar *value = xmlNodeGetContent(n);
+ if (value && *value)
+ {
+ xmlFree(value);
+ match = 1;
+ }
+ }
+ }
+ xmlFree(type);
+ }
+ }
+ }
+ return match;
+}
+
+
+/** \brief ingest XML record
+ \param cl client holds the result set for record
+ \param rec record buffer (0 terminated)
+ \param record_no record position (1, 2, ..)
+ \returns resulting record or NULL on failure
+*/